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The following documents are online. You can also
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<H3>User Documentation</H3>
<DL>
<DT><H4><A HREF=drscheme/index.htm>PLT DrScheme: Programming Environment Manual</A></H4> <DD>
An introduction to DrScheme, including its dialect of Scheme,
for DrScheme users. Documentation for DrScheme's user interface is
provided by a help system built into DrScheme.
<DT><H4><A HREF=drschemejr/index.htm>PLT DrScheme Jr: Programming Shell Manual</A></H4> <DD>
How to use DrScheme Jr, a text-based implementation
of DrScheme with low resource requirements.
<DT><H4><A HREF=mrspidey/index.htm>PLT MrSpidey: Static Debugger Manual</A></H4> <DD>
Reference manual for the interactive static debugger for
DrScheme.
<DT><H4><A HREF=mzscheme/index.htm>PLT MzScheme: Language Manual</A></H4> <DD>
Reference for PLT's base Scheme language, MzScheme, and its
extensions to
<A HREF=r4rs/index.htm>standard
Scheme</A>, including the MzLib library.
<DT><H4><A HREF=mzc/index.htm>PLT <B><tt>mzc</tt></B>: MzScheme Compiler Manual</A></H4> <DD>
Reference for the <B><tt>mzc</tt></B> compiler.
<DT><H4><A HREF=match/index.htm>Pattern Matching for Scheme</A></H4> <DD>
Reference for <TT>match</TT>, Andrew Wright's pattern-matching syntax that
is part of MzLib.
<DT><H4><A HREF=r4rs/index.htm>Revised<SUP>4</SUP> Report on the Algorithmic Language Scheme</A></H4> <DD>
The standard definition of the Scheme language.
<DT><H4><A HREF=toolbox/index.htm>PLT MrEd: Graphical Toolbox Manual</A></H4> <DD>
Reference for
the
primitive procedures and classes for
graphical user interface programming.
<DT><H4><A HREF=master/index.htm>PLT Reference Master Index</A></H4> <DD>
A comprehensive index of the PLT user documentation.
</DL>
<HR>
<H3>System Documentation</H3>
<DL>
<DT><H4><A HREF=m3/index.htm>PLT McMicMac: Parser Manual</A></H4> <DD>
Reference for PLT's core parsing engine.
<DT><H4><A HREF=insidemz/index.htm>Inside PLT MzScheme</A></H4> <DD>
Reference for C/C++ programmers who embed MzScheme
within another language or extend MzScheme with new primitive
features.
<DT><H4><A HREF=xctocc/index.htm>PLT <TT>xctocc</TT>: C++ Glue Generator Manual</A></H4> <DD>
Reference for a utility that helps produce "glue" code for
extending MzScheme with new C++-based classes.
</DL>
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<table width=100%><TR><td align=right><address><A HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A> / scheme@cs.rice.edu</address></td></tr></table>
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<H1 ALIGN=CENTER>PLT DrScheme: Programming Environment Manual</H1>
<P ALIGN=CENTER><STRONG>PLT<BR> Rice University<BR> Houston, TX</STRONG></P><P>
<P ALIGN=CENTER><STRONG>Version 53<BR> July 1998</STRONG></P><P>
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html165" HREF="node2.htm">Send us your Web links</A>
<LI> <A NAME="tex2html166" HREF="node3.htm">Contents</A>
<LI> <A NAME="tex2html167" HREF="node4.htm">Why DrScheme?</A>
<LI> <A NAME="tex2html168" HREF="node5.htm">DrScheme Jr</A>
<LI> <A NAME="tex2html169" HREF="node6.htm">Users Guide</A>
<UL>
<LI> <A NAME="tex2html170" HREF="node7.htm">WARNING: Known Bugs</A>
<LI> <A NAME="tex2html171" HREF="node8.htm">Terminology</A>
<UL>
<LI> <A NAME="tex2html172" HREF="node9.htm">Buffers</A>
<LI> <A NAME="tex2html173" HREF="node10.htm">Buttons</A>
<LI> <A NAME="tex2html174" HREF="node11.htm">Menus</A>
</UL>
<LI> <A NAME="tex2html175" HREF="node12.htm">General DrScheme</A>
<UL>
<LI> <A NAME="tex2html176" HREF="node13.htm">Meet DrScheme</A>
<LI> <A NAME="tex2html177" HREF="node14.htm">Checking Syntax</A>
<LI> <A NAME="tex2html178" HREF="node15.htm">Locating Errors</A>
<LI> <A NAME="tex2html179" HREF="node16.htm">Console IO</A>
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<LI> <A NAME="tex2html184" HREF="node21.htm"><I>View</I></A>
<LI> <A NAME="tex2html185" HREF="node22.htm"><I>Scheme</I></A>
<LI> <A NAME="tex2html186" HREF="node23.htm"><I>Language</I></A>
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<UL>
<LI> <A NAME="tex2html189" HREF="node26.htm">Basic Concepts</A>
<LI> <A NAME="tex2html190" HREF="node27.htm">Moving Around</A>
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<LI> <A NAME="tex2html192" HREF="node29.htm">File Operations</A>
<LI> <A NAME="tex2html193" HREF="node30.htm">Searching</A>
<LI> <A NAME="tex2html194" HREF="node31.htm">Interactions</A>
</UL>
</UL>
<LI> <A NAME="tex2html195" HREF="node32.htm">Language Reference</A>
<UL>
<LI> <A NAME="tex2html196" HREF="node33.htm">Language Levels</A>
<LI> <A NAME="tex2html197" HREF="node34.htm">Configuring your language</A>
<LI> <A NAME="tex2html198" HREF="node35.htm">Initial Basis</A>
<UL>
<LI> <A NAME="tex2html199" HREF="node36.htm">Stand-alone Programs</A>
</UL>
<LI> <A NAME="tex2html200" HREF="node37.htm">Graphics</A>
<UL>
<LI> <A NAME="tex2html201" HREF="node38.htm">Basic Commands</A>
<LI> <A NAME="tex2html202" HREF="node39.htm">Position Operations</A>
<LI> <A NAME="tex2html203" HREF="node40.htm">Color Operations</A>
<LI> <A NAME="tex2html204" HREF="node41.htm">Draw, Clear and Flip Operations</A>
<UL>
<LI> <A NAME="tex2html205" HREF="node42.htm">Viewports</A>
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<LI> <A NAME="tex2html207" HREF="node44.htm">Lines</A>
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<LI> <A NAME="tex2html209" HREF="node46.htm">Ellipses</A>
<LI> <A NAME="tex2html210" HREF="node47.htm">Polygons</A>
<LI> <A NAME="tex2html211" HREF="node48.htm">Strings</A>
<LI> <A NAME="tex2html212" HREF="node49.htm">Pixmaps</A>
</UL>
<LI> <A NAME="tex2html213" HREF="node50.htm">Miscellaneous Operations</A>
<LI> <A NAME="tex2html214" HREF="node51.htm">A Basic Example</A>
<LI> <A NAME="tex2html215" HREF="node52.htm">A More Complicated Example</A>
<LI> <A NAME="tex2html216" HREF="node53.htm">Protecting Graphics Operations</A>
<LI> <A NAME="tex2html217" HREF="node54.htm">Mouse Operations</A>
<LI> <A NAME="tex2html218" HREF="node55.htm">Keyboard Operations</A>
</UL>
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<LI> <A NAME="tex2html222" HREF="node59.htm">Libraries</A>
<LI> <A NAME="tex2html223" HREF="node60.htm">Tools</A>
<UL>
<LI> <A NAME="tex2html224" HREF="node61.htm"><TT>drscheme:rep:edit%</TT></A>
<LI> <A NAME="tex2html225" HREF="node72.htm"><TT>drscheme:unit:definitions-canvas%</TT></A>
<LI> <A NAME="tex2html226" HREF="node75.htm"><TT>drscheme:unit:frame%</TT></A>
<LI> <A NAME="tex2html227" HREF="node89.htm"><TT>drscheme:unit:interactions-canvas%</TT></A>
<LI> <A NAME="tex2html228" HREF="node90.htm">Processing Programs with Zodiac</A>
<LI> <A NAME="tex2html229" HREF="node99.htm">Extending the DrScheme Classes</A>
</UL>
<LI> <A NAME="tex2html230" HREF="node105.htm">Frequently Asked Questions</A>
<UL>
<LI> <A NAME="tex2html231" HREF="node106.htm">Supported Operating Systems and Installation</A>
<LI> <A NAME="tex2html232" HREF="node107.htm">Using DrScheme</A>
<LI> <A NAME="tex2html233" HREF="node108.htm">Memory and Performance</A>
<LI> <A NAME="tex2html234" HREF="node109.htm">Troubleshooting</A>
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<H1 ALIGN=CENTER>PLT DrScheme: Programming Environment Manual</H1>
<P ALIGN=CENTER><STRONG>PLT<BR> Rice University<BR> Houston, TX</STRONG></P><P>
<P ALIGN=CENTER><STRONG>Version 53<BR> July 1998</STRONG></P><P>
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html165" HREF="node2.htm">Send us your Web links</A>
<LI> <A NAME="tex2html166" HREF="node3.htm">Contents</A>
<LI> <A NAME="tex2html167" HREF="node4.htm">Why DrScheme?</A>
<LI> <A NAME="tex2html168" HREF="node5.htm">DrScheme Jr</A>
<LI> <A NAME="tex2html169" HREF="node6.htm">Users Guide</A>
<UL>
<LI> <A NAME="tex2html170" HREF="node7.htm">WARNING: Known Bugs</A>
<LI> <A NAME="tex2html171" HREF="node8.htm">Terminology</A>
<UL>
<LI> <A NAME="tex2html172" HREF="node9.htm">Buffers</A>
<LI> <A NAME="tex2html173" HREF="node10.htm">Buttons</A>
<LI> <A NAME="tex2html174" HREF="node11.htm">Menus</A>
</UL>
<LI> <A NAME="tex2html175" HREF="node12.htm">General DrScheme</A>
<UL>
<LI> <A NAME="tex2html176" HREF="node13.htm">Meet DrScheme</A>
<LI> <A NAME="tex2html177" HREF="node14.htm">Checking Syntax</A>
<LI> <A NAME="tex2html178" HREF="node15.htm">Locating Errors</A>
<LI> <A NAME="tex2html179" HREF="node16.htm">Console IO</A>
</UL>
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<LI> <A NAME="tex2html184" HREF="node21.htm"><I>View</I></A>
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<LI> <A NAME="tex2html190" HREF="node27.htm">Moving Around</A>
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<LI> <A NAME="tex2html192" HREF="node29.htm">File Operations</A>
<LI> <A NAME="tex2html193" HREF="node30.htm">Searching</A>
<LI> <A NAME="tex2html194" HREF="node31.htm">Interactions</A>
</UL>
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<UL>
<LI> <A NAME="tex2html196" HREF="node33.htm">Language Levels</A>
<LI> <A NAME="tex2html197" HREF="node34.htm">Configuring your language</A>
<LI> <A NAME="tex2html198" HREF="node35.htm">Initial Basis</A>
<UL>
<LI> <A NAME="tex2html199" HREF="node36.htm">Stand-alone Programs</A>
</UL>
<LI> <A NAME="tex2html200" HREF="node37.htm">Graphics</A>
<UL>
<LI> <A NAME="tex2html201" HREF="node38.htm">Basic Commands</A>
<LI> <A NAME="tex2html202" HREF="node39.htm">Position Operations</A>
<LI> <A NAME="tex2html203" HREF="node40.htm">Color Operations</A>
<LI> <A NAME="tex2html204" HREF="node41.htm">Draw, Clear and Flip Operations</A>
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<LI> <A NAME="tex2html207" HREF="node44.htm">Lines</A>
<LI> <A NAME="tex2html208" HREF="node45.htm">Rectangles</A>
<LI> <A NAME="tex2html209" HREF="node46.htm">Ellipses</A>
<LI> <A NAME="tex2html210" HREF="node47.htm">Polygons</A>
<LI> <A NAME="tex2html211" HREF="node48.htm">Strings</A>
<LI> <A NAME="tex2html212" HREF="node49.htm">Pixmaps</A>
</UL>
<LI> <A NAME="tex2html213" HREF="node50.htm">Miscellaneous Operations</A>
<LI> <A NAME="tex2html214" HREF="node51.htm">A Basic Example</A>
<LI> <A NAME="tex2html215" HREF="node52.htm">A More Complicated Example</A>
<LI> <A NAME="tex2html216" HREF="node53.htm">Protecting Graphics Operations</A>
<LI> <A NAME="tex2html217" HREF="node54.htm">Mouse Operations</A>
<LI> <A NAME="tex2html218" HREF="node55.htm">Keyboard Operations</A>
</UL>
<LI> <A NAME="tex2html219" HREF="node56.htm">Turtles</A>
<LI> <A NAME="tex2html220" HREF="node57.htm">MrEd Toolbox</A>
<LI> <A NAME="tex2html221" HREF="node58.htm">Printer</A>
</UL>
<LI> <A NAME="tex2html222" HREF="node59.htm">Libraries</A>
<LI> <A NAME="tex2html223" HREF="node60.htm">Tools</A>
<UL>
<LI> <A NAME="tex2html224" HREF="node61.htm"><TT>drscheme:rep:edit%</TT></A>
<LI> <A NAME="tex2html225" HREF="node72.htm"><TT>drscheme:unit:definitions-canvas%</TT></A>
<LI> <A NAME="tex2html226" HREF="node75.htm"><TT>drscheme:unit:frame%</TT></A>
<LI> <A NAME="tex2html227" HREF="node89.htm"><TT>drscheme:unit:interactions-canvas%</TT></A>
<LI> <A NAME="tex2html228" HREF="node90.htm">Processing Programs with Zodiac</A>
<LI> <A NAME="tex2html229" HREF="node99.htm">Extending the DrScheme Classes</A>
</UL>
<LI> <A NAME="tex2html230" HREF="node105.htm">Frequently Asked Questions</A>
<UL>
<LI> <A NAME="tex2html231" HREF="node106.htm">Supported Operating Systems and Installation</A>
<LI> <A NAME="tex2html232" HREF="node107.htm">Using DrScheme</A>
<LI> <A NAME="tex2html233" HREF="node108.htm">Memory and Performance</A>
<LI> <A NAME="tex2html234" HREF="node109.htm">Troubleshooting</A>
</UL>
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<H1><A NAME="SECTION00010000000000000000">Copyright notice</A></H1>
<P>
Copyright ©1996-98 PLT, Rice University
<P>
Permission to make digital/hard copies and/or distribute this
documentation for any purpose is hereby granted without fee,
provided that the above copyright notice, author, and this
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<H1><A NAME="SECTION00100000000000000000">Send us your Web links</A></H1>
<P>
If you use any parts or all of the DrScheme package (software, lecture
notes) for one of your courses, for your research, or for your work, we
would like to know about it. Furthermore, if you use it and publicize the
fact on some Web page, we would like to link to that page. Please drop
us a line at <I>scheme@cs.rice.edu</I>.
Evidence of interest helps the DrScheme Project to maintain the
necessary intellectual and financial support. We appreciate your help.
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<BR> <P>
<P><H2><A NAME="SECTION00200000000000000000">Contents</A></H2>
<UL>
<LI> <A NAME="tex2html270" HREF="node2.htm">Send us your Web links</A>
<LI> <A NAME="tex2html271" HREF="node4.htm">Why DrScheme?</A>
<LI> <A NAME="tex2html272" HREF="node5.htm">DrScheme Jr</A>
<LI> <A NAME="tex2html273" HREF="node6.htm">Users Guide</A>
<UL>
<LI> <A NAME="tex2html274" HREF="node7.htm">WARNING: Known Bugs</A>
<LI> <A NAME="tex2html275" HREF="node8.htm">Terminology</A>
<UL>
<LI> <A NAME="tex2html276" HREF="node9.htm">Buffers</A>
<LI> <A NAME="tex2html277" HREF="node10.htm">Buttons</A>
<LI> <A NAME="tex2html278" HREF="node11.htm">Menus</A>
</UL>
<LI> <A NAME="tex2html279" HREF="node12.htm">General DrScheme</A>
<UL>
<LI> <A NAME="tex2html280" HREF="node13.htm">Meet DrScheme</A>
<LI> <A NAME="tex2html281" HREF="node14.htm">Checking Syntax</A>
<LI> <A NAME="tex2html282" HREF="node15.htm">Locating Errors</A>
<LI> <A NAME="tex2html283" HREF="node16.htm">Console IO</A>
</UL>
<LI> <A NAME="tex2html284" HREF="node17.htm">DrScheme's Menus</A>
<UL>
<LI> <A NAME="tex2html285" HREF="node18.htm"><I>File</I></A>
<LI> <A NAME="tex2html286" HREF="node19.htm"><I>Edit</I></A>
<LI> <A NAME="tex2html287" HREF="node20.htm"><I>Windows</I></A>
<LI> <A NAME="tex2html288" HREF="node21.htm"><I>View</I></A>
<LI> <A NAME="tex2html289" HREF="node22.htm"><I>Scheme</I></A>
<LI> <A NAME="tex2html290" HREF="node23.htm"><I>Language</I></A>
</UL>
<LI> <A NAME="tex2html291" HREF="node24.htm">Preferences</A>
<LI> <A NAME="tex2html292" HREF="node25.htm">Keyboard Shortcuts</A>
<UL>
<LI> <A NAME="tex2html293" HREF="node26.htm">Basic Concepts</A>
<LI> <A NAME="tex2html294" HREF="node27.htm">Moving Around</A>
<LI> <A NAME="tex2html295" HREF="node28.htm">Editing Operations</A>
<LI> <A NAME="tex2html296" HREF="node29.htm">File Operations</A>
<LI> <A NAME="tex2html297" HREF="node30.htm">Searching</A>
<LI> <A NAME="tex2html298" HREF="node31.htm">Interactions</A>
</UL>
</UL>
<LI> <A NAME="tex2html299" HREF="node32.htm">Language Reference</A>
<UL>
<LI> <A NAME="tex2html300" HREF="node33.htm">Language Levels</A>
<LI> <A NAME="tex2html301" HREF="node34.htm">Configuring your language</A>
<LI> <A NAME="tex2html302" HREF="node35.htm">Initial Basis</A>
<UL>
<LI> <A NAME="tex2html303" HREF="node36.htm">Stand-alone Programs</A>
</UL>
<LI> <A NAME="tex2html304" HREF="node37.htm">Graphics</A>
<UL>
<LI> <A NAME="tex2html305" HREF="node38.htm">Basic Commands</A>
<LI> <A NAME="tex2html306" HREF="node39.htm">Position Operations</A>
<LI> <A NAME="tex2html307" HREF="node40.htm">Color Operations</A>
<LI> <A NAME="tex2html308" HREF="node41.htm">Draw, Clear and Flip Operations</A>
<UL>
<LI> <A NAME="tex2html309" HREF="node42.htm">Viewports</A>
<LI> <A NAME="tex2html310" HREF="node43.htm">Pixels</A>
<LI> <A NAME="tex2html311" HREF="node44.htm">Lines</A>
<LI> <A NAME="tex2html312" HREF="node45.htm">Rectangles</A>
<LI> <A NAME="tex2html313" HREF="node46.htm">Ellipses</A>
<LI> <A NAME="tex2html314" HREF="node47.htm">Polygons</A>
<LI> <A NAME="tex2html315" HREF="node48.htm">Strings</A>
<LI> <A NAME="tex2html316" HREF="node49.htm">Pixmaps</A>
</UL>
<LI> <A NAME="tex2html317" HREF="node50.htm">Miscellaneous Operations</A>
<LI> <A NAME="tex2html318" HREF="node51.htm">A Basic Example</A>
<LI> <A NAME="tex2html319" HREF="node52.htm">A More Complicated Example</A>
<LI> <A NAME="tex2html320" HREF="node53.htm">Protecting Graphics Operations</A>
<LI> <A NAME="tex2html321" HREF="node54.htm">Mouse Operations</A>
<LI> <A NAME="tex2html322" HREF="node55.htm">Keyboard Operations</A>
</UL>
<LI> <A NAME="tex2html323" HREF="node56.htm">Turtles</A>
<LI> <A NAME="tex2html324" HREF="node57.htm">MrEd Toolbox</A>
<LI> <A NAME="tex2html325" HREF="node58.htm">Printer</A>
</UL>
<LI> <A NAME="tex2html326" HREF="node59.htm">Libraries</A>
<LI> <A NAME="tex2html327" HREF="node60.htm">Tools</A>
<UL>
<LI> <A NAME="tex2html328" HREF="node61.htm"><TT>drscheme:rep:edit%</TT></A>
<LI> <A NAME="tex2html329" HREF="node72.htm"><TT>drscheme:unit:definitions-canvas%</TT></A>
<LI> <A NAME="tex2html330" HREF="node75.htm"><TT>drscheme:unit:frame%</TT></A>
<LI> <A NAME="tex2html331" HREF="node89.htm"><TT>drscheme:unit:interactions-canvas%</TT></A>
<LI> <A NAME="tex2html332" HREF="node90.htm">Processing Programs with Zodiac</A>
<LI> <A NAME="tex2html333" HREF="node99.htm">Extending the DrScheme Classes</A>
</UL>
<LI> <A NAME="tex2html334" HREF="node105.htm">Frequently Asked Questions</A>
<UL>
<LI> <A NAME="tex2html335" HREF="node106.htm">Supported Operating Systems and Installation</A>
<LI> <A NAME="tex2html336" HREF="node107.htm">Using DrScheme</A>
<LI> <A NAME="tex2html337" HREF="node108.htm">Memory and Performance</A>
<LI> <A NAME="tex2html338" HREF="node109.htm">Troubleshooting</A>
</UL>
<LI> <A NAME="tex2html339" HREF="node110.htm">Index</A>
<LI> <A NAME="tex2html340" HREF="node111.htm"> About this document ... </A>
</UL>
<P>
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<H1><A NAME="SECTION00300000000000000000">Why DrScheme?</A></H1>
<P>
Teaching introductory computing courses with Scheme, or any other
functional programming language, facilitates many conceptual tasks and
greatly enhances the appeal of computer science. Specifically, students can
implement many interesting programs with just a small subset of the
language. The execution of a functional program can be explained with
simple reduction rules that students mostly know from secondary school.
Interactive implementations allow for quick feedback to the programmers and
make the development of small functions a pleasant experience.
<P>
Unfortunately, the poor quality of the available environments for
functional languages negates these advantages. Typical implementations
accept too many definitions, that is, definitions that are syntactically
well-formed in the sense of the full language but meaningless for
beginners. The results are inexplicable behavior, incomprehensible run-time
errors, or confusing type error messages. The imperative nature of
read-eval-print loops often introduces subtle bugs into otherwise perfect
program developments. Scheme, in particular, suffers from an adherence to
Lisp's output traditions, which often produces confusing effects. In many
cases, students, especially those familiar with commercial C++
environments, mistake these problems for problems with the functional
approach and reject the approach itself.
<P>
To overcome this obstacle, we have developed a new programming environment
for Scheme. It fully integrates a (graphics-enriched) editor, a
multi-lingual parser that can process a hierarchy of syntactically
restrictive variants of Scheme, a functional read-eval-print loop, and an
algebraically sensible printer. The environment catches the
typical syntactic mistakes of beginners and pinpoints the exact source
location of run-time exceptions. The new programming environment also
provides an algebraic stepper and a static debugger. The former
reduces Scheme programs, including programs with assignment
and control effects, to values (and effects). The static debugger infers
what set of values an expression may produce and how values flow from
expressions into variables. It exposes potential safety violations and, upon
demand from the programmer, explains its reasoning by drawing value flow
graphs over the program text. Preliminary experience with the environment
shows that Rice University students find it helpful and that they greatly
prefer it to shell-based or Emacs-based systems.
<P>
A paper that discusses DrScheme's educational benefits in more detail is
available on the web:
<A NAME="tex2html1" HREF="http://www.cs.rice.edu/CS/PLT/Publications/">http://www.cs.rice.edu/CS/PLT/Publications/</A>. It is published in the
proceedings for
<EM>The Ninth International Symposium on Programming Languages, Implementations, Logics, and Programs</EM>, September 1997.
<P>
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<BR> <P>
<H1><A NAME="SECTION00400000000000000000">DrScheme Jr</A></H1>
<P>
DrScheme Jr is an alternative to DrScheme that uses less memory and
only supports a textual interface. See
<A NAME="tex2html2" HREF="../drschemejr/index.html">DrScheme Jr</A>
for more information.
<P>
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<H1><A NAME="SECTION00500000000000000000">Users Guide</A></H1>
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html377" HREF="node7.htm">WARNING: Known Bugs</A>
<LI> <A NAME="tex2html378" HREF="node8.htm">Terminology</A>
<UL>
<LI> <A NAME="tex2html379" HREF="node9.htm">Buffers</A>
<LI> <A NAME="tex2html380" HREF="node10.htm">Buttons</A>
<LI> <A NAME="tex2html381" HREF="node11.htm">Menus</A>
</UL>
<LI> <A NAME="tex2html382" HREF="node12.htm">General DrScheme</A>
<UL>
<LI> <A NAME="tex2html383" HREF="node13.htm">Meet DrScheme</A>
<LI> <A NAME="tex2html384" HREF="node14.htm">Checking Syntax</A>
<LI> <A NAME="tex2html385" HREF="node15.htm">Locating Errors</A>
<LI> <A NAME="tex2html386" HREF="node16.htm">Console IO</A>
</UL>
<LI> <A NAME="tex2html387" HREF="node17.htm">DrScheme's Menus</A>
<UL>
<LI> <A NAME="tex2html388" HREF="node18.htm"><I>File</I></A>
<LI> <A NAME="tex2html389" HREF="node19.htm"><I>Edit</I></A>
<LI> <A NAME="tex2html390" HREF="node20.htm"><I>Windows</I></A>
<LI> <A NAME="tex2html391" HREF="node21.htm"><I>View</I></A>
<LI> <A NAME="tex2html392" HREF="node22.htm"><I>Scheme</I></A>
<LI> <A NAME="tex2html393" HREF="node23.htm"><I>Language</I></A>
</UL>
<LI> <A NAME="tex2html394" HREF="node24.htm">Preferences</A>
<LI> <A NAME="tex2html395" HREF="node25.htm">Keyboard Shortcuts</A>
<UL>
<LI> <A NAME="tex2html396" HREF="node26.htm">Basic Concepts</A>
<LI> <A NAME="tex2html397" HREF="node27.htm">Moving Around</A>
<LI> <A NAME="tex2html398" HREF="node28.htm">Editing Operations</A>
<LI> <A NAME="tex2html399" HREF="node29.htm">File Operations</A>
<LI> <A NAME="tex2html400" HREF="node30.htm">Searching</A>
<LI> <A NAME="tex2html401" HREF="node31.htm">Interactions</A>
</UL>
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<B> Previous:</B> <A NAME="tex2html403" HREF="node6.htm">Users Guide</A>
<BR> <P>
<H1><A NAME="SECTION00510000000000000000">WARNING: Known Bugs</A></H1>
<P>
<UL><LI> Check Syntax alpha-renaming does not work with <TT>define-struct</TT>.<LI> Check Syntax will treat some primitives as unbound identifiers,
notably <TT>first</TT>, and <TT>rest</TT>.<LI> Check Syntax will not always highlight nested expressions.<LI> The alpha renaming in Check Syntax may miss some names. You can check
which names will be renamed by moving the mouse cursor over the
<EM>binding</EM> occurrance of the variable you want to rename. The bound
occurrances that the arrows reach will also be the ones that are
renamed.<LI> If you break a long interaction several times, some of the breaks may
carry over to the next interactions.
</UL><BR> <HR>
<P><ADDRESS>
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<BR> <P>
<H1><A NAME="SECTION00520000000000000000">Terminology</A></H1>
<P>
These descriptions should help you understand the rest of the DrScheme help
documents.
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html426" HREF="node9.htm">Buffers</A>
<LI> <A NAME="tex2html427" HREF="node10.htm">Buttons</A>
<LI> <A NAME="tex2html428" HREF="node11.htm">Menus</A>
</UL>
<BR> <HR>
<P><ADDRESS>
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<BR> <P>
<H2><A NAME="SECTION00521000000000000000">Buffers</A></H2>
<P>
Each DrScheme frame contains two buffers. Using the <I>View</I> menu,
you can view either or both of these buffers. When both are shown, the top
buffer is the definitions buffer and the bottom buffer is the interactions
buffer.
<P>
<BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
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<BR> <P>
<H2><A NAME="SECTION00522000000000000000">Buttons</A></H2>
<P>
Each DrScheme frame also contains several buttons:
<UL><LI><I>Save</I> will save the contents of the program buffer to a file. If
there is a filename to the left of this button, the contents will be saved
to that name. If it says "Untitled" then you will be prompted for
a filename. This button only appears when the contents of the program
buffer have been modified since they were saved. Thus this button does not
appear when you start DrScheme or right after you save or load a file.<LI><I>Check Syntax</I> checks the syntax of the program buffer contents and
highlights the syntax.<LI><I>Analyze</I> opens the static debugger and invokes it on your
program. This button only appears if the static debugger is
installed. See the
<A NAME="tex2html3" HREF="../mrspidey/index.html">local MrSpidey Manual</A> (if
installed) or the
<A NAME="tex2html4" HREF="http://www.cs.rice.edu/CS/PLT/packages/mrspidey/">MrSpidey webpage</A>
for more information.<LI><I>Execute</I> first checks the syntax of the program buffer contents and, if
successful, then loads the contents of the program buffer into Scheme. In
other words, to define the functions and variables in the program buffer,
you should use "Execute".<LI><I>Break</I> will interrupt Scheme while it is evaluating something.
Use this if your program goes into an infinite loop.<LI> <I>Help</I> will open up a help frame.
</UL><BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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<BR> <P>
<H2><A NAME="SECTION00523000000000000000">Menus</A></H2>
<P>
Menus have different items that you can select. To see a menu's items,
press the left mouse button while the pointer is over the menu name. To
select a menu item, release the left mouse button while the pointer is over
that item.
<P>
There are five menus at the top of DrScheme. They are called the
<I>File</I> menu, the <I>Edit</I> menu, the <I>Windows</I> menu, the
<I>View</I> menu, the <I>Scheme</I> menu, and the <I>Language</I> menu.
<P>
<BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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<BR> <P>
<H1><A NAME="SECTION00530000000000000000">General DrScheme</A></H1>
<P>
This describes the general set-up of DrScheme. It also gives more
detailed explanations about checking syntax and locating errors.
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html475" HREF="node13.htm">Meet DrScheme</A>
<LI> <A NAME="tex2html476" HREF="node14.htm">Checking Syntax</A>
<LI> <A NAME="tex2html477" HREF="node15.htm">Locating Errors</A>
<LI> <A NAME="tex2html478" HREF="node16.htm">Console IO</A>
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<BR> <HR>
<P><ADDRESS>
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</ADDRESS>
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<BR> <P>
<H2><A NAME="SECTION00531000000000000000">Meet DrScheme</A></H2>
<P>
DrScheme provides a convenient environment for students learning to program
in Scheme. The program buffer is a regular editing buffer that
automatically indents Scheme code when you hit RETURN or TAB. The Scheme
buffer is a Scheme interpreter. You can click the mouse at any point in
either buffer to type at that point.
<P>
Hitting RETURN in the Scheme buffer will cause the preceding expression to
be evaluated, unless the parentheses don't balance in which case DrScheme
will move to the next line. You can select text and hit RETURN at any
point in the buffer to copy the selected text to the prompt.
<P>
When the cursor is next to a parenthesis, DrScheme will shade the region
between this parenthesis and the matching parenthesis. If you type a ``)''
which matches a ``['' the ``)'' will be changed to a ``]'' automatically.
If a closing parenthesis is not matched, DrScheme will beep. Quotation
marks are also matched. Beware, anopening quote mark will actually match to
the previous closing quote mark even though that isn't what you mean.
<P>
Generally when you program in DrScheme, you will begin by typing a new
program into the program buffer or opening an existing file into the
program buffer. As you program, try out expressions in the interactions
buffer as necessary. You can check the syntax of the program buffer
contents as well. When you are ready to run your program, press the
<I>Execute</I> button. Now, if all went well you can test out with the
interactions buffer. If an error occurs, DrScheme will report the source
location of the error. Don't forget to save your files when you are done!
<P>
<BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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<H2><A NAME="SECTION00532000000000000000">Checking Syntax</A></H2>
<P>
When you press the Check Syntax button, DrScheme will check the
syntax of the program buffer contents. Any illegal syntax in the buffer
will be highlighted. Each correct expression in the program will also be
annotated with colors describing the lexical structure of the program.
<P>
<BR> <HR>
<P><ADDRESS>
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<BR> <P>
<H2><A NAME="SECTION00533000000000000000">Locating Errors</A></H2>
<P>
When an error is located, it will be located either in the definitions
buffer or the interactions buffer. DrScheme will highlight the source
location of the error and print the error message in the interactions
buffer.
<P>
<BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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<H2><A NAME="SECTION00534000000000000000">Console IO</A></H2>
<P>
Many people who have used <TT>read</TT> in other Scheme implementations find
the <TT>read</TT> primitive in DrScheme odd. This section attempts to explain
what is happening.
<P>
One of the enhancements in DrScheme is that it carefully
differentiates the i/o of the program from the final value(s) it
returns. In a typical Scheme implementation, all these interactions
occur in the same visual space, which can be confusing, can lead to
incoherent i/o state, and produces illegible transcripts. In
DrScheme, all (screen) i/o creates its own separate i/o panel (and
uses separate color cues) to distinguish i/o from the results of
expression evaluation.
<P>
Unfortunately, this interaction is not always obvious.
Here's a simple example. Consider the program
<P>
<PRE> (define v (read))
v</PRE>
<P>
Executing this (by typing it into the definitions window and clicking
on the execute button) yields
<P>
<PRE> --------------------------------------------------------------------
|_ |
--------------------------------------------------------------------</PRE>
<P>
with the cursor at the spot marked by the underscore. The mouse pointer,
confusingly, turns into a watch cursor, even when you move it over the
panel. This is okay. Click the mouse inside the box and type. This will
be read by DrScheme. If you were to type <TT>(1 2)</TT> and hit enter, you
would see
<P>
<PRE> --------------------------------------------------------------------
|(1 2) |
--------------------------------------------------------------------
(1 2)
> _</PRE>
<P>
The second <TT>(1 2)</TT> is the value of <TT>v</TT> being printed out.
<P>
Here is a more confusing example. Consider the program
<P>
<PRE> (define v (read))
(display v)
v</PRE>
<P>
and provide the same input. Executing this produces
<P>
<PRE> --------------------------------------------------------------------
|(1 2) |
|(1 2) |
--------------------------------------------------------------------
(1 2)
> _</PRE>
<P>
The <TT>display</TT> has written its output beneath the input you typed.
However, say you were to enter this program one line at a time in
the interactions window instead. You would get
<P>
<PRE> > (define v read)
--------------------------------------------------------------------
| |
--------------------------------------------------------------------</PRE>
<P>
If you type in <TT>(1 2)</TT> followed by return, you get
<P>
<PRE> > (define v read)
--------------------------------------------------------------------
|(1 2) |
--------------------------------------------------------------------
></PRE>
<P>
Next, <TT>(display v)</TT>:
<P>
<PRE> > (display v)
--------------------------------------------------------------------
|(1 2) |
--------------------------------------------------------------------
> _</PRE>
<P>
Now enter <TT>v</TT>:
<P>
<PRE> > v
(1 2)
> _</PRE>
<P>
This example has the same program, but very different behavior! This
is because Scheme cannot determine the extent of a top-level's
interaction. Hence, each expression is treated as if it were a
program on its own.
<P>
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<H2><A NAME="SECTION00541000000000000000"><I>File</I></A></H2>
<P>
<UL><LI><I>New</I> creates a new DrScheme window.<LI><I>Open...</I> brings up a dialog box from which you choose a
file. The file you choose will be loaded into the program buffer. You
will be warned if the current definitions buffer contents are not saved. In
the dialog box, highlight a file and choose OK. To switch to a
subdirectory, highlight the subdirectory and choose OK. To switch to a
containing directory press the button above the file list and choose a
directory. To switch to an arbitrary directory type the directory in the
little window along the bottom of the dialog, and press return.<LI><I>Open URL...</I> will bring up a dialog box prompting you for a
Uniform Resource Locator (URL). Try <TT>http://www.cs.rice.edu/CS/PLT/</TT>!<LI><I>Revert</I> loads the file currently in the program buffer.
That is, any changes you made since the file was last saved will be
ignored. You are warned if the current program buffer contents are
not saved.<LI><I>Save Definitions</I> saves the definitions buffer contents.
If the file is untitled, you will be prompted for a filename.
If not, the current filename will be used.<LI><I>Save Definitions As...</I> will save the definitions buffer contents
in a new file. You are prompted for a filename.<LI><I>Save Definitions As Text...</I> saves the definitions buffer contents
in a new file, as text only. You are prompted for a filename.<LI><I>Save Interactions</I> saves the interactions buffer contents.
If the file is untitled, you will be prompted for a filename.
If not, the current filename will be used.<LI><I>Save Interactions As...</I> will save the interactions buffer
contents in a new file. You are prompted for a filename.<LI><I>Save Interactions As Text...</I> saves the definitions buffer contents
in a new file, as text only. You are prompted for a filename.<LI><I>Show Interactions History</I> opens a window that shows the
history of expressions evaluated in the interactions buffer. Use meta-p
in the interactions buffer to cycle through the history.<LI><I>Print Definitions...</I> opens a dialog for printing the program
currently in the definitions buffer.<LI><I>Print Interactions...</I> opens a dialog for printing the
contents of the interactions buffer.<LI><I>Close</I> closes this DrScheme window. If this is the last
DrScheme window open, DrScheme will quit. You will be warned if the
current definitions buffer is not saved.<LI><I>Quit</I> or <I>Exit</I> exits DrScheme. You will be warned if the current
definitions buffer is not saved.
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<BR> <P>
<H2><A NAME="SECTION00542000000000000000"><I>Edit</I></A></H2>
<P>
All edit menu items operate on the <I>active buffer</I>, the buffer with the
caret. Specifically, separate Undo and Redo records are kept for each
buffer. Thus, to undo or redo an action, the caret must be in that buffer.
<P>
<UL><LI><I>Undo</I> will undo the last editing action done in a buffer. A
history is stored so you can undo several actions by choosing Undo
several times.<LI><I>Redo</I> will ``undo an undo''. This is different than choosing <I>Undo</I> twice. <I>Redo</I> cancels undo, but choosing <I>Undo</I> twice
undoes the last two actions, except undos.<LI><I>Cut</I> will delete the selected text and copy the selected text
such that choosing Paste will use this text.<LI><I>Copy</I> will copy the selected text such that choosing Paste will
use this text.<LI><I>Paste</I> will paste the last text copied or cut at the current
caret position.<LI><I>Delete</I> will delete the selected text. This text is not saved for
use with <I>Paste</I>.<LI><I>Find</I> will open the serach panel at the bottom of the frame.<LI><I>Replace</I> will open the serach panel at the bottom of the frame.<LI><I>Insert Text Box</I> inserts a box. This box can have arbitrary
text inserted into it. It is treated as a value, like a symbol.<LI><I>Insert Graphic Box</I> inserts a box. This box is treated like a
symbol.<LI><I>Insert Image...</I> prompts the user for filename, and inserts the
image in that file. This image is treated like a symbol.<LI><I>Toggle Wrap Text</I> switches between wrapped text and unwrapped
text.<LI><I>Preferences</I> opens the preferences dialog box. See
section <A HREF="node24.htm#prefsexplanation"><IMG SRC="../icons/crossref.gif" WIDTH=13 HEIGHT=13 BORDER=0 ALIGN=BOTTOM ALT="[cross-reference]"></A>.
<P>
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<H2><A NAME="SECTION00543000000000000000"><I>Windows</I></A></H2>
<P>
This menu contains an entry for each open window. Selecting a menu item
makes the corresponding window come to the front.
<P>
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<H2><A NAME="SECTION00544000000000000000"><I>View</I></A></H2>
<P>
<UL><LI><I>Show Interactions</I> will show interactions buffer.<LI><I>Hide Interactions</I> will hide interactions buffer.<LI><I>Show Definitions</I> will show the definitions buffer.<LI><I>Hide Definitions</I> will hide the definitions buffer.
</UL>
Only the two relevant menu items appear at any given time.
<P>
Whenever a program is executed, the interactions buffer will automatically
be made visible.
<P>
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<H2><A NAME="SECTION00545000000000000000"><I>Scheme</I></A></H2>
<P>
<UL><LI><I>Execute</I> will execute the definitions window.<LI><I>Break</I> will break the current evaluation.<LI><I>Indent</I> will correctly indent the selected text. (This can also
be done just by pressing the Tab key on your keyboard.)<LI><I>Indent All</I> will correctly indent all of the text in the ``active
buffer'' (the buffer where the cursor currently is).<LI><I>Comment Out</I> will put ``;'' characters at the beginning of each
line of the selected text except for lines that already have a ``;'' at the
very left-most position.<LI><I>Uncomment</I> will remove all of the ``;'' characters at the left
of the lines in the selected text. It will remove ``;'' which come after
spaces but before other text. If multiple blocks of ``;'' exist (eg.
``;; ;'') it will only delete the left-most block.
</UL><BR> <HR>
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<H2><A NAME="SECTION00546000000000000000"><I>Language</I></A></H2>
<P>
The language menu controls the language in your drscheme.
<UL><LI><I>Configure Language</I>
This item brings up a dialog box which lets you control which language you
use in your DrScheme.
See section <A HREF="node34.htm#secconfigurelanguage"><IMG SRC="../icons/crossref.gif" WIDTH=13 HEIGHT=13 BORDER=0 ALIGN=BOTTOM ALT="[cross-reference]"></A> for more information.<LI><I>Select Library...</I>
<A NAME="selectinglibraries"></A>
This menu item brings up a the open file dialog, where you can choose a
library. The definitions in the library will be available in DrScheme after
the click on the <I>Execute</I> button.
<P>
See
<A HREF="node59.htm#constructinglibraries">the Extending DrScheme Section</A>
for information on how to construct libraries.<LI><I>Clear Library</I>
This will clear the library from DrScheme.
<P>
</UL><BR> <HR>
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<BR> <P>
<H1><A NAME="SECTION00550000000000000000">Preferences</A></H1>
<P>
<A NAME="prefsexplanation"></A>
<P>
The preferences are stored in a user-specific directory when possible:
<UL><LI> Under X Windows, preferences are stored in ``.mred.prefs''
in the user's home directory.<LI> Under Windows, if the HOMEDRIVE and HOMEPATH environment
variables are defined, preferences are stored in
``%HOMEDRIVE%\%HOMEPATH%\mred.pre'',
otherwise preferences are stored in ``mred.pre'' in the directory
contqining the MrEd binary.<LI> Under MacOS, preferences are stored in ``MrEd Preferences''
in the preferences folder.
</UL>
<P>
There are several different panels in the preferences dialog. Each is
listed below, along with a description of which configuration options each
has.
<UL><LI><B>General</B>
<UL><LI><I>Highlight between matching parens</I>
If this is checked, the region between matching parenthesis is marked,
either with a gray background (in color) or a stipple pattern (in
monochrome).<LI><I>Correct parens</I>
If this is checked, as a closing parenthesis is typed, it will be
corrected to match its opening parenthesis.<LI><I>Flash paren match</I>
If this is checked, typing a closing paren causes the corresponding
opening paren to flash briefly.<LI><I>Auto-save files</I>
If this is checked, autosave files will be created for files that have
not been saved for five minutes.<LI><I>Map delete to backspace</I>
If this is checked, the delete key does a backspace operation.<LI><I>Use platform-specific file dialogs</I>
If this is checked, the file dialogs for open, Save, and Save As... will
be the platform specific dialogs, implemented by the GUI on the
platform DrScheme is running on. If not, the dialogs provided by
MrEd are used.<LI><I>Verify exit</I>
If checked, a dialog will prompt the user before he exits, ensuring he
wants to exit.<LI><I>Ask before changing save format</I>
If this is checked, and a file with images is being saved, DrScheme will
prompt the user to be sure he wants to save in a non-text format.<LI><I>Wordwrap editor buffers</I>
If checked, wordwrapping is turned on. This preference only takes for new
frames, it does not change old ones<LI><I>Show status line</I>
If checked, each frame will have a status line showing the state of the
file being edited.<LI><I>Count line and column numbers from one</I>
If checked, the status line's line and column counter will count from
one. Otherwise, it will count from zero.<LI><I>Enable keybindings in menus</I>
If checked, some menus have keybindings in them. If not, those
keybindings will not appear (and of course, will not work).
This preference only takes for new
frames, it does not change old ones<LI><I>Automatically print to postscript file</I>
If checked, DrScheme will print directly to a postscript file, rather
than using the standard printer dialog. This is only available under
Windows and MacOS.
</UL><LI><B>Default Fonts</B>
<P>
These control the default fonts that DrScheme uses in various aspects of
it's display. These correspond to the font families found in the
<A NAME="tex2html5" HREF="../toolbox/index.html">MrEd Toolbox Manual</A>.
DrScheme uses the <I>Modern</I> font for editing Scheme code, and the <I>Default</I> font for editing other files.<LI><B>Indenting</B>
<P>
This controls how DrScheme's automatic indenting is parameterized.<LI><B>General II</B>
<UL><LI><I>Keep execution history in interactions buffer</I>
If this is checked, interactions from previous executions are visible in
the interactions buffer. Otherwise, they are cleared out on each execution.<LI><I>Only warn once when executions and interactions are not synchronized</I>
When checked, DrScheme warns the user after the first interaction where the
interactions window does not match the definitions window. If it is not
checked, the warning appears after each interaction.<LI><I>Open all files as Scheme programs</I>
When checked, all files are opened in a definitions window, and have an
interactions window below. If it is not checked, only files that end with
<TT>.ss</TT>, <TT>.scm</TT>, or <TT>.sch</TT> will have an interactions window.<LI><I>Interactions window always active</I>
<P>
If this preference is off, only the first DrScheme window will have an
active interactions window, and only if there is no file in it. If this
preference is on, all DrScheme windows will have an active interactions
window. If the interactions window is not active, DrScheme windows will
open faster.
<P>
Note that the interactions window will become active after the execute
button is clicked, in all cases.
<P>
</UL><LI><B>Check Syntax</B>
<P>
This controls the font and color changes that Check Syntax uses.
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<H1><A NAME="SECTION00560000000000000000">Keyboard Shortcuts</A></H1>
<P>
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<UL>
<LI> <A NAME="tex2html635" HREF="node26.htm">Basic Concepts</A>
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<BR> <P>
<H2><A NAME="SECTION00561000000000000000">Basic Concepts</A></H2>
<P>
Most of the key strokes that you type (``a'', ``3'', ``('', etc.) simply insert
that character into your file. But others do things like move the cursor
around, delete a line, insert a file, etc. These commands generally involve
the Control or Meta keys.
<P>
C- <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6030" SRC="img1.gif" > key <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6032" SRC="img2.gif" > = This means press the Control key, hold it down
and then press <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6030" SRC="img1.gif" > key <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6032" SRC="img2.gif" > and then release them both. For
example: C-e (Control-E) moves the cursor to the end of the current line.
<P>
M- <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6030" SRC="img1.gif" > key <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6032" SRC="img2.gif" > = Same as C- <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6030" SRC="img1.gif" > key <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6032" SRC="img2.gif" > , except with the
Meta key. Depending on your keyboard, Meta may be called ``Left'',
``Right'' or have a diamond symbol, but it's usually on the bottom row next
to the space bar. M- <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6030" SRC="img1.gif" > key <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6032" SRC="img2.gif" > can also be performed as a
two-character sequence: first, strike and release the Escape key, then
strike <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6030" SRC="img1.gif" > key <IMG WIDTH=4 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline6032" SRC="img2.gif" > . Under Windows and MacOS, meta is only
available through the Escape key.
<P>
DEL = The Delete key.
<P>
SPACE = The Space bar.
<P>
Note: On most keyboards, ``<'' and ``>'' are shifted characters. So, to
get M->, you actually have to type Meta-Shift->. That is, press and
hold down both the Meta and Shift keys, and then strike ``>''.
<P>
Note: Many of the key bindings can also be done with menu items.
<P>
Under Windows, some of these keybindings are actually standard menu items.
Those keybindings will behave according to the menus, unless the
<I>Enable Keybindings In Menus</I> preference is unchecked.
<P>
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<BR> <P>
<H2><A NAME="SECTION00562000000000000000">Moving Around</A></H2>
<P>
<UL><LI>C-f move forward one character<LI>C-b move backward one character<LI>M-f move forward one word<LI>M-b move backward one word<LI>C-v move forward one page<LI>M-v move backward one page<LI>M-< move to beginning of file<LI>M-> move to end of file<LI>C-a move to beginning of line (left)<LI>C-e move to end of line (right)<LI>C-n move to next line (down)<LI>C-p move to previous line (up)<LI>M-C-f move forward one S-expression<LI>M-C-b move backward one S-expression<LI>M-C-u move up out of an S-expression<LI>M-C-d move down into a nested S-expression<LI>M-C-SPACE select forward S-expression<LI>M-C-p match parentheses backward
</UL><BR> <HR>
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<H2><A NAME="SECTION00563000000000000000">Editing Operations</A></H2>
<P>
<UL><LI>C-d delete forward one character<LI>C-h delete backward one character<LI>M-d delete forward one word<LI>M-DEL delete backward one word<LI>C-k delete forward to end of line<LI>M-C-k delete forward one S-expression<LI>M-w copy selection to clipboard<LI>C-w delete selection to clipboard (cut)<LI>C-y paste from clipboard (yank)<LI>C-t transpose characters<LI>M-t transpose words<LI>C-_ undo<LI>C-+ redo<LI>C-x u undo
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<H2><A NAME="SECTION00564000000000000000">File Operations</A></H2>
<P>
<UL><LI>C-x C-s save file<LI>C-x C-w save file under new name
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<H2><A NAME="SECTION00565000000000000000">Searching</A></H2>
<P>
<UL><LI>C-s search for string forward<LI>C-r search for string backward
</UL><BR> <HR>
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<BR> <P>
<H2><A NAME="SECTION00566000000000000000">Interactions</A></H2>
<P>
The interactions window has all of the same keyboard shortcuts as the
definitions window plus a few more:
<P>
<UL><LI>M-p bring the previously executed expression down to the prompt.<LI>M-n bring the expression after the current expression in the
expression history down to the prompt.
</UL><BR> <HR>
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<H1><A NAME="SECTION00600000000000000000">Language Reference</A></H1>
<P>
<A NAME="chaplanguagereference"></A>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html723" HREF="node33.htm">Language Levels</A>
<LI> <A NAME="tex2html724" HREF="node34.htm">Configuring your language</A>
<LI> <A NAME="tex2html725" HREF="node35.htm">Initial Basis</A>
<UL>
<LI> <A NAME="tex2html726" HREF="node36.htm">Stand-alone Programs</A>
</UL>
<LI> <A NAME="tex2html727" HREF="node37.htm">Graphics</A>
<UL>
<LI> <A NAME="tex2html728" HREF="node38.htm">Basic Commands</A>
<LI> <A NAME="tex2html729" HREF="node39.htm">Position Operations</A>
<LI> <A NAME="tex2html730" HREF="node40.htm">Color Operations</A>
<LI> <A NAME="tex2html731" HREF="node41.htm">Draw, Clear and Flip Operations</A>
<UL>
<LI> <A NAME="tex2html732" HREF="node42.htm">Viewports</A>
<LI> <A NAME="tex2html733" HREF="node43.htm">Pixels</A>
<LI> <A NAME="tex2html734" HREF="node44.htm">Lines</A>
<LI> <A NAME="tex2html735" HREF="node45.htm">Rectangles</A>
<LI> <A NAME="tex2html736" HREF="node46.htm">Ellipses</A>
<LI> <A NAME="tex2html737" HREF="node47.htm">Polygons</A>
<LI> <A NAME="tex2html738" HREF="node48.htm">Strings</A>
<LI> <A NAME="tex2html739" HREF="node49.htm">Pixmaps</A>
</UL>
<LI> <A NAME="tex2html740" HREF="node50.htm">Miscellaneous Operations</A>
<LI> <A NAME="tex2html741" HREF="node51.htm">A Basic Example</A>
<LI> <A NAME="tex2html742" HREF="node52.htm">A More Complicated Example</A>
<LI> <A NAME="tex2html743" HREF="node53.htm">Protecting Graphics Operations</A>
<LI> <A NAME="tex2html744" HREF="node54.htm">Mouse Operations</A>
<LI> <A NAME="tex2html745" HREF="node55.htm">Keyboard Operations</A>
</UL>
<LI> <A NAME="tex2html746" HREF="node56.htm">Turtles</A>
<LI> <A NAME="tex2html747" HREF="node57.htm">MrEd Toolbox</A>
<LI> <A NAME="tex2html748" HREF="node58.htm">Printer</A>
</UL>
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<H1><A NAME="SECTION00610000000000000000">Language Levels</A></H1>
<P>
DrScheme supports four language levels with these features:
<P>
<A NAME="figlanguagelevels"></A>
<P> <IMG WIDTH=816 HEIGHT=707 ALIGN=BOTTOM ALT="tabular13718" SRC="img3.gif" > <P>
<P>
The MrEd language uses the MrEd vocabulary, which is more
efficient than the other vocabularies, but does not provide source
correlation for error messages.
<P>
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<H1><A NAME="SECTION00620000000000000000">Configuring your language</A></H1>
<P>
<A NAME="secconfigurelanguage"></A>
Choosing <I>Language</I> <IMG WIDTH=2 HEIGHT=24 ALIGN=MIDDLE ALT="tex2html_wrap_inline6218" SRC="img4.gif" > <I>Configure Language...</I> opens a window with a
choice dialog item. The choice permits you to choose a language level.
The dialog also contains a <I>Show Details</I> button. Clicking on this
button, or choosing the <I>Custom</I> language opens a new bottom portion of
the dialog.
<P>
The top and bottom portions of the dialog are always synchronized with each
other.
For example, if you select <I>Beginner</I> from the <I>Language</I>
choice, the items in the bottom portion change to reflect
the specifics of the language <I>Beginner</I>.
Conversely, if you are working in the language <I>Beginner</I>
and change
the <I>Output Syntax</I> choice, the <I>Language</I> choice changes
to <I>Custom</I> to show that the current language matches none of the
pre-defined languages.
<P>
The description of a language level consist of three parts:
input syntax, safety properties, and output syntax.
The input syntax is specified through the <I>Case sensitive</I> check box,
and a <I>vocabulary</I>, a set of syntactic forms.
The four pre-defined vocabularies are: <I>Beginner</I>,
<I>Intermediate</I>, <I>Advanced</I>, <I>R <IMG WIDTH=6 HEIGHT=7 ALIGN=BOTTOM ALT="tex2html_wrap_inline6220" SRC="img5.gif" > RS+</I> and
<I>MrEd</I>.
<P>
The first three rows of the table in figure <A HREF="node33.htm#figlanguagelevels"><IMG SRC="../icons/crossref.gif" WIDTH=13 HEIGHT=13 BORDER=0 ALIGN=BOTTOM ALT="[cross-reference]"></A>
specify the exact syntactic content of the various language levels, except
for the MrEd vocabulary. The MrEd vocabulary matches MrEd, as described in
the
<A NAME="tex2html6" HREF="../toolbox/index.html">PLT MrEd: Graphical Toolbox</A>:
manual.
<P>
The safety properties of DrScheme allow you to choose between
conformance with R <IMG WIDTH=6 HEIGHT=7 ALIGN=BOTTOM ALT="tex2html_wrap_inline6220" SRC="img5.gif" > RS and more sensible error reporting.
They can be specified with these check boxes:
<UL><LI><I>Allow improper lists</I>,<LI><I>Allow set! on undefined identifiers</I>,<LI><I>Unmatched cond/case is an error</I>,<LI><I>Signal endefined variables when first referenced</I>,<LI><I>Conditionals must evaluate to either <TT>#t</TT> or <TT>#f</TT></I>, and<LI><I>Eq? only compares symbols</I>.
</UL>
When the <I>Allow improper lists</I> is unchecked, <TT>cons</TT> can only
be used to construct lists; its second argument must always be either
<TT>null</TT> or the result of an application of <TT>cons</TT>.
The <I>Allow set! on undefined identifiers</I> check box controls whether
<TT>set!</TT> creates a new name at the top-level or signals an error for
unbound identifiers.
If <I>Unmatched cond/case is an error</I> is on, the implicit <TT>else</TT>
clause in <TT>cond</TT> and <TT>case</TT> expressions signal a run-time error,
and if it is off, the implicit
<TT>else</TT> clauses return a void value.
The <I>Signal undefined variables when first referenced</I> checkbox
determines when undefined variable references are signaled as an error. If
the checkbox is on, undefined variables are signaled as early as possible,
but at a significant runtime cost.
If <I>Conditionals must evaluate to either <TT>#t</TT> or <TT>#f</TT></I> is
set, then the question position of each cond clause must evaluate to a
boolean. If not, the question position can evaluate to any scheme value,
where <TT>#f</TT> is treated as false, and all other values are true.
When <I>Eq? only compares symbols</I> is checked, <TT>eq?</TT> will signal
an error unless its arguments are both symbols.
<P>
The output syntax is determined by the <I>Show sharing in values</I> check
box, the <I>Abbreviate multipls cons's with list</I> check box,
the <I>Print inexacts with #i</I> check box,
the <I>Print rationals in whole/part notation</I> check box, and the <I>Printing</I>
choice.
When <I>Show sharing in values</I> is on, all sharing within data
structures is displayed in the output.
When <I>Abbreviate multiple cons's with list</I> is on,
mutiple cons that have a null in the final <TT>cdr</TT> (or <TT>rest</TT>)
position will print using <TT>list</TT>.
When <I>Print inexact numbers with #i</I> is on,
inexact numbers are always printed with a leading <TT>#i</TT>.
When <I>Print rationals in whole/part notation</I> is on,
rationals number larger than one will print as a sum of the whole number
part and the fractional part.
For example, the number <TT>3/2</TT> will print as <TT>(+ 1 1/2)</TT>.
The <I>Printing</I> choice provides four alternatives:
<I>Constructor</I>, <I>Quasiquote (lists only)</I>, <I>Quasiquote (read syntax)</I>
or <I>R <IMG WIDTH=6 HEIGHT=7 ALIGN=BOTTOM ALT="tex2html_wrap_inline6220" SRC="img5.gif" > RS style</I>.
Constructor style output means that the list containing the numbers
<TT>1</TT>, <TT>2</TT>, and <TT>3</TT> prints out as <TT>(list 1 2 3)</TT>.
Because it mirrors input syntax, constructor style output is useful
for general programs and mandatory for pedagogic programming.
In contrast, quasiquote style is a compromise between the constructor
style output and the standard Scheme output style. Like the former,
the quasiquote-style printer outputs answers that match the Lisp-style
input syntax. But, its outputs can also be used as programs, just like
those of the standard Scheme printer.
<P>
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<BR> <P>
<H1><A NAME="SECTION00630000000000000000">Initial Basis</A></H1>
<P>
DrScheme provides almost all of the the standard MzScheme primitives, as
well as the core MzLib functions. In the R <IMG WIDTH=6 HEIGHT=7 ALIGN=BOTTOM ALT="tex2html_wrap_inline6220" SRC="img5.gif" > RS+ language level, it
provides all of MzScheme's syntactic forms.
<P>
DrScheme does not support all of the parameters that MzScheme provides.
<TT>current-prompt-read</TT>, <TT>current-print</TT>, and <TT>current-eval</TT> will
not change the behavior of DrScheme's <font size=-1><small>REPL</small></font>, but they will take effect
if you call <TT>eval</TT> or <TT>read-eval-print</TT>.
<P>
DrScheme also provides these syntactic forms in the R <IMG WIDTH=6 HEIGHT=7 ALIGN=BOTTOM ALT="tex2html_wrap_inline6220" SRC="img5.gif" > RS+ language
level.
<P>
<UL><LI> From the turtles, section <A HREF="node56.htm#turtles"><IMG SRC="../icons/crossref.gif" WIDTH=13 HEIGHT=13 BORDER=0 ALIGN=BOTTOM ALT="[cross-reference]"></A>:
<UL><LI> <TT>split</TT><LI> <TT>split*</TT><LI> <TT>tprompt</TT>
</UL><LI> From the <A NAME="tex2html7" HREF="../mrspidey/index.html">Static Debugger</A>:
<UL><LI> <TT>mrspidey:control</TT><LI> <TT>:</TT><LI> <TT>polymorphic</TT><LI> <TT>type:</TT>
</UL><LI> From <A HREF="../mzscheme/node162.htm#mzmzlib">MzLib</A>:
<UL><LI> <TT>begin-construction-time</TT><LI> <TT>begin-elaboration-time</TT><LI> <TT>define-constructor</TT><LI> <TT>define-type</TT><LI> <TT>local</TT><LI> <TT>nand</TT><LI> <TT>nor</TT><LI> <TT>rec</TT><LI> <TT>recur</TT><LI> <TT>reference</TT><LI> <TT>reference-library-unit</TT><LI> <TT>reference-library-unit/sig</TT><LI> <TT>reference-unit</TT><LI> <TT>reference-unit/sig</TT><LI> <TT>send*</TT>
</UL></UL>
<P>
Any other macros in <A HREF="../mzscheme/node162.htm#mzmzlib">MzLib</A> can be used in your
DrScheme program by calling <TT>reference-library</TT> as described in
<A HREF="../mzscheme/node162.htm#mzmzlib">Library Collections</A>.
<P>
<BR> <HR>
<UL>
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<H2><A NAME="SECTION00631000000000000000">Stand-alone Programs</A></H2>
<P>
After completing a DrScheme program it may be run in mzscheme.
The program must either run in DrScheme Jr or:
<UL><LI> not use any of the <TT>wx:</TT> or <TT>mred:</TT> identifiers, and<LI> must not use any picture values.
</UL>
<P>
If that is the case, consult the launcher collection's documentation,
<TT><B>plt/collects/launcher/doc.txt</TT></B> to create a launcher.
<P>
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<H1><A NAME="SECTION00640000000000000000">Graphics</A></H1>
<P>
<A NAME="graphics"></A>
DrScheme's graphics library is a simple, easy-to-use toolbox of
graphics commands. The library is not very powerful; it is intended
as a simple alternative to MrEd's full graphical toolbox.
<P>
The graphics library originated as SIXlib, a library of X Windows
commands available within Chez Scheme at Rice University. The
functionality of that library has been reproduced (with backward
compatibility) in the DrScheme version.
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html808" HREF="node38.htm">Basic Commands</A>
<LI> <A NAME="tex2html809" HREF="node39.htm">Position Operations</A>
<LI> <A NAME="tex2html810" HREF="node40.htm">Color Operations</A>
<LI> <A NAME="tex2html811" HREF="node41.htm">Draw, Clear and Flip Operations</A>
<UL>
<LI> <A NAME="tex2html812" HREF="node42.htm">Viewports</A>
<LI> <A NAME="tex2html813" HREF="node43.htm">Pixels</A>
<LI> <A NAME="tex2html814" HREF="node44.htm">Lines</A>
<LI> <A NAME="tex2html815" HREF="node45.htm">Rectangles</A>
<LI> <A NAME="tex2html816" HREF="node46.htm">Ellipses</A>
<LI> <A NAME="tex2html817" HREF="node47.htm">Polygons</A>
<LI> <A NAME="tex2html818" HREF="node48.htm">Strings</A>
<LI> <A NAME="tex2html819" HREF="node49.htm">Pixmaps</A>
</UL>
<LI> <A NAME="tex2html820" HREF="node50.htm">Miscellaneous Operations</A>
<LI> <A NAME="tex2html821" HREF="node51.htm">A Basic Example</A>
<LI> <A NAME="tex2html822" HREF="node52.htm">A More Complicated Example</A>
<LI> <A NAME="tex2html823" HREF="node53.htm">Protecting Graphics Operations</A>
<LI> <A NAME="tex2html824" HREF="node54.htm">Mouse Operations</A>
<LI> <A NAME="tex2html825" HREF="node55.htm">Keyboard Operations</A>
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<H2><A NAME="SECTION00641000000000000000">Basic Commands</A></H2>
<P>
<UL><LI> <A NAME=18522></A>
<TT>(open-graphics)</TT> <BR>
<TT>open-graphics</TT> initializes these graphics routines. It must be
called before any other graphics operations.<LI> <A NAME=18523></A>
<TT>(close-graphics)</TT> <BR>
<TT>close-graphics</TT> closes all of the windows and until
<TT>open-graphics</TT> is called again, no graphics routines will work.<LI> <A NAME=18524></A>
<TT>(open-viewport <EM>name</EM> <EM>horiz</EM> <EM>vert</EM> <EM>scale</EM>)</TT> <BR>
<TT>open-viewport</TT> takes a string <EM>name</EM> and integers
<EM>horiz</EM> and <EM>vert</EM> and creates a new window called <EM>name</EM>.
The window is <EM>horiz</EM>*<EM>scale</EM> pixels wide and <EM>vert</EM>*<EM>scale</EM>
pixels high. The <EM>scale</EM> value is used for all drawing commands, so
the drawing area is <EM>horix</EM> by <EM>vert</EM> units.
The <EM>scale</EM> argument can be omitted; it defaults to 1.0.
For backward compatibility, a single <TT>posn</TT> value (see below) can
be submitted in the place of <EM>horiz</EM> and <EM>vert</EM>. (In this case,
the <EM>scale</EM> argument is not allowed.)
<EM>open-viewport</EM> returns a viewport descriptor.<A NAME="tex2html11" HREF="footnode.htm#18526"><IMG SRC="../icons/footnote.gif" WIDTH=15 HEIGHT=15 BORDER=0 ALIGN=BOTTOM ALT="[footnote]"></A><LI> <A NAME=18527></A>
<TT>(open-pixmap <EM>name</EM> <EM>horiz</EM> <EM>vert</EM> <EM>scale</EM>)</TT> <BR>
<TT>open-pixmap</TT> is exactly like <TT>open-viewport</TT>, but the resulting
viewport is not displayed on the screen. Offscreen pixmaps are useful for
executing a sequence of drawing commands and displaying them all at once
with <TT>copy-viewport</TT>.<LI> <A NAME=18529></A>
<TT>(close-viewport <EM>viewport</EM>)</TT> <BR>
<TT>close-viewport</TT> takes a viewport descriptor. It removes the viewport
from the screen and makes subsequent operations dealing with the
viewport illegal.<LI> <A NAME=18531></A>
<TT>(set-viewport-scale<EM>viewport</EM> <EM>scale</EM>)</TT> <BR>
<TT>set-viewport-scale</TT> takes a viewport descriptor and a scale factor.
It clears the viewport and changes its scale for drawing commands.
<P>
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<BR> <P>
<H2><A NAME="SECTION00642000000000000000">Position Operations</A></H2>
<P>
A position is the place where a pixel goes in a viewport.
The upper-left corner is pixel (0, 0) and the orientation of
the position coordinates within a viewport is as follows:
<P>
<P> <IMG WIDTH=196 HEIGHT=80 ALIGN=BOTTOM ALT="picture493" SRC="img6.gif" > <P>
<P>
<UL><LI> <A NAME=18539></A>
<TT>(make-posn <EM>x</EM> <EM>y</EM>)</TT> <BR>
<TT>make-posn</TT> takes two integers and returns a position
with the specified <EM>x</EM> and <EM>y</EM> coordinates.<LI> <A NAME=18541></A>
<TT>(posn-x p)</TT>, <TT>(posn-y p)</TT> <BR>
<TT>posn-x</TT> and <TT>posn-y</TT> return the <EM>x</EM> and <EM>y</EM>
coordinates, respectively, of a position.<LI> <A NAME=18542></A>
<TT>(posn? <EM>p</EM>)</TT> <BR>
<TT>posn?</TT> reports whether its argument is a valid position.<LI> <A NAME=18544></A>
<TT>((get-pixel <EM>viewport</EM>) p)</TT> <BR>
<TT>get-pixel</TT> returns the color of the pixel at position <EM>p</EM> in
<EM>viewport</EM>; 0 denotes white and 1 denotes not white.
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<BR> <P>
<H2><A NAME="SECTION00643000000000000000">Color Operations</A></H2>
<P>
A color can be represented in two ways: as a color index or as a
<TT>rgb</TT> value. All drawing functions which take a color argument
accept colors in both forms. An <TT>rgb</TT> value is assigned to
and index with <TT>change-color</TT>.
<P>
<UL><LI> <A NAME=18546></A>
<TT>(make-rgb <EM>red</EM> <EM>green</EM> <EM>blue</EM>)</TT> <BR>
<TT>make-rgb</TT> takes three values in the range 0 (dark) to 1 (bright) and
returns an <TT>rgb</TT> (a color).<LI> <A NAME=18548></A>
<TT>(rgb-red <EM>color</EM>)<BR> (rgb-blue <EM>color</EM>)<BR> (rgb-green <EM>color</EM>)</TT> <BR>
<TT>rgb-red</TT>, <TT>rgb-green</TT> and <TT>rgb-blue</TT> return the red, green,
and blue components, respectively, of a color.<LI> <A NAME=18550></A>
<TT>(rgb? <EM>color</EM>)</TT> <BR>
<TT>rgb?</TT> reports whether <TT>color</TT> is a valid color.<LI> <A NAME=18552></A>
<TT>(change-color <EM>index</EM> <EM>rgb</EM>)</TT> <BR>
<TT>change-color</TT> changes the color at <EM>index</EM> in the color table to the
color specified in <EM>rgb</EM>.<LI> <A NAME=18554></A>
<TT>(default-display-is-color?)</TT> <BR>
<TT>default-display-is-color?</TT> returns <TT>#t</TT> if the default display
screen for viewports is in color or <TT>#f</TT> otherwise.
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<H2><A NAME="SECTION00644000000000000000">Draw, Clear and Flip Operations</A></H2>
<P>
These are the basic graphics operations for drawing to a viewport.
Each function takes a viewport as its argument and returns a function
operating within that viewport.
Further arguments, if any, are curried.
For example, <TT>(draw-line viewport)</TT> returns a
function, that can then be applied to the proper arguments to draw a
line in the viewport corresponding to viewport descriptor <EM>viewport</EM>.
An example follows.
<P>
Where ``draw-'' commands make pixels black, ``clear-'' commands make them
white.
<P>
Where ``draw-'' commands make pixels black, a ``flip-'' commands cause
them to change.
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html874" HREF="node42.htm">Viewports</A>
<LI> <A NAME="tex2html875" HREF="node43.htm">Pixels</A>
<LI> <A NAME="tex2html876" HREF="node44.htm">Lines</A>
<LI> <A NAME="tex2html877" HREF="node45.htm">Rectangles</A>
<LI> <A NAME="tex2html878" HREF="node46.htm">Ellipses</A>
<LI> <A NAME="tex2html879" HREF="node47.htm">Polygons</A>
<LI> <A NAME="tex2html880" HREF="node48.htm">Strings</A>
<LI> <A NAME="tex2html881" HREF="node49.htm">Pixmaps</A>
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<H3><A NAME="SECTION00644100000000000000">Viewports</A></H3>
<P>
<UL><LI> <A NAME=18555></A>
<TT>((draw-viewport <EM>viewport</EM>) <EM>color</EM>)</TT> <BR>
<TT>draw-viewport</TT> takes a viewport descriptor. It returns a
function that colors the entire contents of <EM>viewport</EM>.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18557></A>
<TT>((clear-viewport <EM>viewport</EM>))</TT> <BR>
<TT>clear-viewport</TT> takes a viewport descriptor. It returns a
function that whitens the entire contents of <EM>viewport</EM>.<LI> <A NAME=18559></A>
<TT>((flip-viewport <EM>viewport</EM>))</TT> <BR>
<TT>flip-viewport</TT> takes a viewport descriptor.
It returns a function that flips the contents of <EM>viewport</EM>.<LI> <A NAME=18561></A>
<TT>((copy-viewport <EM>source-viewport</EM> <EM>destination-viewport</EM>))</TT> <BR>
<TT>copy-viewport</TT> takes two viewport descriptors.
It copies the <EM>source-viewport</EM> into the <EM>destination-viewport</EM>.
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<H3><A NAME="SECTION00644200000000000000">Pixels</A></H3>
<P>
<UL><LI> <A NAME=18563></A>
<TT>((draw-pixel viewport) <EM>p</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-pixel</TT> takes a viewport descriptor. It returns a function that
draws a pixel in <EM>viewport</EM> at the specified position.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18565></A>
<TT>((clear-pixel <EM>viewport</EM>) <EM>p</EM>)</TT> <BR>
<TT>clear-pixel</TT> takes a viewport descriptor. It returns a function that
clears a pixel in <EM>viewport</EM> at the specified position.<LI> <A NAME=18567></A>
<TT>((flip-pixel <EM>viewport</EM>) <EM>p</EM>)</TT> <BR>
<TT>flip-pixel</TT> takes a viewport descriptor. It returns a function that
flips a pixel in <EM>viewport</EM> at the specified position.
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<H3><A NAME="SECTION00644300000000000000">Lines</A></H3>
<P>
<UL><LI> <A NAME=18569></A>
<TT>((draw-line <EM>viewport</EM>) <EM>p1</EM> <EM>p2</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-line</TT> takes a viewport descriptor. It returns a function that
draws a line in the <EM>viewport</EM> connecting positions <EM>p1</EM> and <EM>p2</EM>.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18571></A>
<TT>((clear-line <EM>viewport</EM>) <EM>p1</EM> <EM>p2</EM>)</TT> <BR>
<TT>clear-line</TT> takes a viewport descriptor. It returns a function that
clears a line in <EM>viewport</EM> connecting positions <EM>p1</EM> and <EM>p2</EM>.<LI> <A NAME=18573></A>
<TT>((flip-line <EM>viewport</EM>) <EM>p1</EM> <EM>p2</EM>)</TT> <BR>
<TT>flip-line</TT> takes a viewport descriptor. It returns a function that
flips a line in <EM>viewport</EM> connecting positions <EM>p1</EM> and <EM>p2</EM>.
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<H3><A NAME="SECTION00644400000000000000">Rectangles</A></H3>
<P>
<UL><LI> <A NAME=18575></A>
<TT>((draw-rectangle <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-rectangle</TT> takes a viewport descriptor. It returns a function
that draws a rectangle border in the <EM>viewport</EM> with the top-left of
the rectangle at the position <EM>posn</EM> and with sides <EM>width</EM> across
and <EM>height</EM> tall.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18577></A>
<TT>((clear-rectangle <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>clear-rectangle</TT> takes a viewport descriptor. It returns a function that
clears a rectangle border in the <EM>viewport</EM> with the top-left of the rectangle
at the position <EM>posn</EM> and with sides <EM>width</EM> across and <EM>height</EM> tall.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18579></A>
<TT>((flip-rectangle <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>flip-rectangle</TT> takes a viewport descriptor. It returns a function that
flips a rectangle border in the <EM>viewport</EM> with the top-left of the rectangle
at the position <EM>posn</EM> and with sides <EM>width</EM> across and <EM>height</EM> tall.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18581></A>
<TT>((draw-solid-rectangle <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-solid-rectangle</TT> takes a viewport descriptor. It returns a function that
paints a solid rectangle in the <EM>viewport</EM> with the top-left of the rectangle
at the position <EM>posn</EM> and with sides <EM>width</EM> across and <EM>height</EM> tall.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18583></A>
<TT>((clear-solid-rectangle <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>clear-solid-rectangle</TT> takes a viewport descriptor. It returns a function that
erases a solid rectangle in the <EM>viewport</EM> with the top-left of the rectangle
at the position <EM>posn</EM> and with sides <EM>width</EM> across and <EM>height</EM> tall.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18585></A>
<TT>((flip-solid-rectangle <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>flip-solid-rectangle</TT> takes a viewport descriptor. It returns a function that
flips a solid rectangle in the <EM>viewport</EM> with the top-left of the rectangle
at the position <EM>posn</EM> and with sides <EM>width</EM> across and <EM>height</EM> tall.
The optional <EM>color</EM> argument defaults to black.
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<H3><A NAME="SECTION00644500000000000000">Ellipses</A></H3>
<P>
<UL><LI> <A NAME=18587></A>
<TT>((draw-ellipse <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-ellipse</TT> takes a viewport descriptor. It returns a function that
draws an ellipse border in the <EM>viewport</EM>. The <EM>posn</EM>, <EM>width</EM>,
and <EM>height</EM> arguments are as in <TT>draw-rectangle</TT>; the ellispse
is inscribed within the specified rectangle.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18589></A>
<TT>((clear-ellipse <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>clear-ellipse</TT> takes a viewport descriptor. It returns a function that
clears an ellipse border in the <EM>viewport</EM>. The <EM>posn</EM>, <EM>width</EM>,
and <EM>height</EM> arguments are as in <TT>clear-rectangle</TT>; the ellispse
is inscribed within the specified rectangle.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18591></A>
<TT>((flip-ellipse <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>flip-ellipse</TT> takes a viewport descriptor. It returns a function that
flips an ellipse border in the <EM>viewport</EM>. The <EM>posn</EM>, <EM>width</EM>,
and <EM>height</EM> arguments are as in <TT>flip-rectangle</TT>; the ellispse
is inscribed within the specified rectangle.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18593></A>
<TT>((draw-solid-ellipse <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-solid-ellipse</TT> takes a viewport descriptor. It returns a function that
paints a solid ellipse in the <EM>viewport</EM>. The <EM>posn</EM>, <EM>width</EM>,
and <EM>height</EM> arguments are as in <TT>draw-rectangle</TT>; the ellispse
is inscribed within the specified rectangle.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18595></A>
<TT>((clear-solid-ellipse <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>clear-solid-ellipse</TT> takes a viewport descriptor. It returns a function that
erases a solid ellipse in the <EM>viewport</EM>. The <EM>posn</EM>, <EM>width</EM>,
and <EM>height</EM> arguments are as in <TT>clear-rectangle</TT>; the ellispse
is be inscribed within the specified rectangle.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18597></A>
<TT>((flip-solid-ellipse <EM>viewport</EM>) <EM>posn</EM> <EM>width</EM> <EM>height</EM> <EM>color</EM>)</TT> <BR>
<TT>flip-solid-ellipse</TT> takes a viewport descriptor. It returns a function that
flips a solid ellipse in the <EM>viewport</EM>. The <EM>posn</EM>, <EM>width</EM>,
and <EM>height</EM> arguments are as in <TT>flip-rectangle</TT>; the ellispse
is be inscribed within the specified rectangle.
The optional <EM>color</EM> argument defaults to black.
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<BR> <P>
<H3><A NAME="SECTION00644600000000000000">Polygons</A></H3>
<P>
<UL><LI> <A NAME=18599></A>
<TT>((draw-polygon <EM>viewport</EM>) <EM>posn-list</EM> <EM>posn</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-polygon</TT> takes a viewport descriptor. It returns a function that
draws a polygon border in the <EM>viewport</EM> using <EM>posn-list</EM> for the
polygon vertices and <EM>posn</EM> as an offeset for the polygon.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18601></A>
<TT>((clear-polygon <EM>viewport</EM>) <EM>posn-list</EM> <EM>posn</EM>)</TT> <BR>
<TT>clear-polygon</TT> takes a viewport descriptor. It returns a function that
erases a polygon border in the <EM>viewport</EM> using <EM>posn-list</EM> for the
polygon vertices and <EM>posn</EM> as an offeset for the polygon.<LI> <A NAME=18603></A>
<TT>((flip-polygon <EM>viewport</EM>) <EM>posn-list</EM> <EM>posn</EM>)</TT> <BR>
<TT>flip-polygon</TT> takes a viewport descriptor. It returns a function that
flips a polygon border in the <EM>viewport</EM> using <EM>posn-list</EM> for the
polygon vertices and <EM>posn</EM> as an offeset for the polygon.<LI> <A NAME=18605></A>
<TT>((draw-solid-polygon <EM>viewport</EM>) <EM>posn-list</EM> <EM>posn</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-solid-polygon</TT> takes a viewport descriptor. It returns a function that
paints a solid polygon in the <EM>viewport</EM> using <EM>posn-list</EM> for the
polygon vertices and <EM>posn</EM> as an offeset for the polygon.
The optional <EM>color</EM> argument defaults to black.<LI> <A NAME=18607></A>
<TT>((clear-solid-polygon <EM>viewport</EM>) <EM>posn-list</EM> <EM>posn</EM>)</TT> <BR>
<TT>clear-solid-polygon</TT> takes a viewport descriptor. It returns a function that
erases a solid polygon in the <EM>viewport</EM> using <EM>posn-list</EM> for the
polygon vertices and <EM>posn</EM> as an offeset for the polygon.<LI> <A NAME=18609></A>
<TT>((flip-solid-polygon <EM>viewport</EM>) <EM>posn-list</EM> <EM>posn</EM>)</TT> <BR>
<TT>flip-solid-polygon</TT> takes a viewport descriptor. It returns a function that
flips a solid polygon in the <EM>viewport</EM> using <EM>posn-list</EM> for the
polygon vertices and <EM>posn</EM> as an offeset for the polygon.
<P>
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<H3><A NAME="SECTION00644700000000000000">Strings</A></H3>
<P>
<A NAME=18611></A>
<TT>((draw-string <EM>viewport</EM>) <EM>p</EM> <EM>string</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-string</TT> takes a viewport descriptor. It returns a function that
draws a string at a specified location in the <EM>viewport</EM>. The lower
left of the string begins at <EM>p</EM>.
The optional <EM>color</EM> argument defaults to black.
<P>
<A NAME=18613></A>
<TT>((clear-string <EM>viewport</EM>) <EM>p</EM> <EM>string</EM>)</TT> <BR>
<TT>clear-string</TT> takes a viewport descriptor. It returns a
function that clears a string at a specified location in
<EM>viewport</EM>. The lower left of the string begins at <EM>p</EM>.
<P>
<A NAME=18615></A>
<TT>((flip-string <EM>viewport</EM>) <EM>p</EM> <EM>string</EM>)</TT> <BR>
<TT>flip-string</TT> takes a viewport descriptor. It returns a function that
flips a string at a specified location in <EM>viewport</EM>. The lower
left of the string begins at <EM>p</EM>.
<P>
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<H3><A NAME="SECTION00644800000000000000">Pixmaps</A></H3>
<P>
<UL><LI> <A NAME=18617></A>
<TT>(((draw-pixmap-posn <EM>filename</EM> <EM>type</EM>) <EM>viewport</EM>) <EM>posn</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-pixmap-posn</TT> draws an X bitmap into <EM>viewport</EM> with its
upper left corner at position <EM>posn</EM>.
<EM>type</EM> is a symbol, one of <TT>'gif</TT>, <TT>'xbm</TT>, <TT>'xpm</TT>,
<TT>'bmp</TT> or <TT>'pict</TT>. All formats are supported on all platforms
except <TT>'pict</TT> which is only supported under MacOS.
<EM>type</EM> defaults to the extension of <EM>filename</EM>
If <EM>color</EM> is not <TT>#f</TT> it is passed to
<TT>set-viewport-pen</TT> with the viewport. It defaults to <TT>#f</TT>.<LI> <A NAME=18619></A>
<TT>(((clear-pixmap-posn <EM>filename</EM> <EM>type</EM>) <EM>viewport</EM>) <EM>posn</EM>)</TT> <BR>
<TT>clear-pixmap-posn</TT> clears an X bitmap into <EM>viewport</EM>. All of
its arguments are the same as <TT>draw-pixmap-posn</TT>, except that no
<TT>color</TT> argument is accepted.<LI> <A NAME=18621></A>
<TT>(((flip-pixmap-posn <EM>filename</EM> <EM>type</EM>) <EM>viewport</EM>) <EM>posn</EM> <EM>color</EM>)</TT> <BR>
<TT>flip-pixmap-posn</TT> flips an X bitmap into <EM>viewport</EM>. All of the
arguments are the same as <TT>draw-pixmap-posn</TT><LI><A NAME=18623></A>
<TT>(pixmap-functions filename type)</TT>
<TT>pixmap-functions</TT> constructs the offscreen pixmap corresponding to
<EM>filename</EM> and <EM>type</EM>. <EM>type</EM> is optional, it defaults the
same way as the <EM>type</EM> argument as <EM>draw-pixmap-posn</EM>.
<TT>pixmap-functions</TT> return three values: <TT>draw</TT>, <TT>flip</TT> and
<TT>clear</TT>:
<UL><LI><TT>(draw <EM>viewport</EM> <EM>p</EM> <EM>color</EM>)</TT>
draw the pixmap at the posn <EM>p</EM> in <EM>viewport</EM>, first setting
the pen to <EM>color</EM>.<LI><TT>(clear <EM>viewport</EM> <EM>p</EM>)</TT>
clear the pixmap at the posn <EM>p</EM> in <EM>viewport</EM>.<LI><TT>(flip <EM>viewport</EM> <EM>p</EM> <EM>color</EM>)</TT>
flip the pixmap at the posn <EM>p</EM> in <EM>viewport</EM>, first setting
the pen to <EM>color</EM>.
</UL><LI> <A NAME=18627></A>
<TT>((draw-pixmap <EM>viewport</EM>) <EM>filename</EM> <EM>p</EM> <EM>color</EM>)</TT> <BR>
<TT>draw-pixmap</TT> draws an X bitmap into <EM>viewport</EM> <EM>w</EM> with its
upper left corner at position <EM>p</EM>.
If <EM>color</EM> is not <TT>#f</TT> it is passed to
<TT>set-viewport-pen</TT> with the viewport. It defaults to <TT>#f</TT>.
This function is for backward compatibility and should not be used. It is
very inefficient.<LI> <A NAME=18629></A>
<TT>((clear-pixmap <EM>viewport</EM>) <EM>filename</EM> <EM>p</EM>)</TT> <BR>
<TT>clear-pixmap</TT> clears an X bitmap into <EM>viewport</EM> with its
upper left corner at <EM>p</EM>.
This function is for backward compatibility and should not be used. It is
very inefficient.<LI> <A NAME=18631></A>
<TT>((flip-pixmap <EM>w</EM>) <EM>filename</EM> <EM>p</EM> <EM>color</EM>)</TT> <BR>
<TT>flip-pixmap</TT> flips an X bitmap into <EM>viewport</EM> with its
upper left corner at <EM>p</EM>.
If <EM>color</EM> is not <TT>#f</TT> it is passed to
<TT>set-viewport-pen</TT> with the viewport. It defaults to <TT>#f</TT>.
This function is for backward compatibility and should not be used. It is
very inefficient.
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<H2><A NAME="SECTION00645000000000000000">Miscellaneous Operations</A></H2>
<P>
<UL><LI> <A NAME=18633></A>
<TT>((get-string-size <EM>viewport</EM>) <EM>string</EM>)</TT> <BR>
<TT>get-string-size</TT> takes a viewport descriptor. It returns a
function that returns the size of a string as a list of two numbers:
the width and height.<LI> <A NAME=18635></A>
<TT>(viewport->snip <EM>viewport</EM>)</TT> <BR>
<TT>viewport->snip</TT> takes a viewport descriptor. It returns an
object that can be inserted into an editor buffer to display the
current image in the viewport. (Subsequent drawing to the viewport
does not affect the snip's image.)
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<H2><A NAME="SECTION00646000000000000000">A Basic Example</A></H2>
<P>
Type the following commands in DrScheme.
<P>
<PRE> ; nothing appears to happen
; but behind the scenes ...
> (open-graphics)
; viewport appears
> (define w (open-viewport "practice" 300 300))
; line appears
> ((draw-line w) (make-posn 30 30) (make-posn 100 100))
; viewport disappears
> (close-viewport w)
; again, nothing appears to happen
; unclosed viewports (if any) would disappear
> (close-graphics)</PRE>
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<H2><A NAME="SECTION00647000000000000000">A More Complicated Example</A></H2>
<P>
The use of multiple viewports, viewport descriptors, drawing
operations for multiple viewports is as easy as the use of a single
viewport:
<P>
<PRE> > (open-graphics)
> (let* ( ; w1 and w2 are viewport descriptors for different windows
[w1 (open-viewport "viewport 1" 300 300)]
[w2 (open-viewport "viewport 2" 200 500)]
; d1 and d2 are functions that draw lines in different viewports
[d1 (draw-line w1)]
[d2 (draw-line w2)])
; draws a line in viewport labeled "viewport 1"
(d1 (make-posn 100 5) (make-posn 5 100))
; draws a line in viewport labeled "viewport 2"
(d2 (make-posn 100 100) (make-posn 101 400)))
; we no longer have access to viewports 1 and 2,
; since their descriptors did not escape the let.
> (close-graphics) ; removes the viewports</PRE>
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<H2><A NAME="SECTION00648000000000000000">Protecting Graphics Operations</A></H2>
<P>
To guarantee the proper closing of viewports in cases of errors,
especially when a program manages several viewports simultaneously, a
programmer should use <TT>dynamic-wind:</TT>
<P>
<PRE>> (let ([w (open-viewport "hello" 100 100)])
(dynamic-wind
; what we want to happen first: nothing
void
; the main program (errors constrained to this piece)
(lambda () (draw-pixel 13)) ; an error
; what we would like to happen, whether the main program finishes
; normally or not
(lambda () (close-viewport w))))</PRE>
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<H2><A NAME="SECTION00649000000000000000">Mouse Operations</A></H2>
<P>
The graphics library contains functions that determine where the
mouse is, if there are any clicks, etc.
The functions <TT>get-mouse-click</TT> and <TT>ready-mouse-click</TT> first
return a ``mouse-click descriptor,'' and then other functions take
the descriptor and return the mouse's position, which button was
pushed, etc<A NAME="tex2html64" HREF="footnode.htm#18637"><IMG SRC="../icons/footnote.gif" WIDTH=15 HEIGHT=15 BORDER=0 ALIGN=BOTTOM ALT="[footnote]"></A>.
<P>
<UL><LI> <A NAME=18638></A>
<TT>(get-mouse-click <EM>viewport</EM>)</TT> <BR>
<TT>get-mouse-click</TT> takes a viewport descriptor and returns
a mouse click descriptor.
It returns the next mouse click in the <EM>viewport</EM>, waiting for a click
if necessary.<LI> <A NAME=18640></A>
<TT>(ready-mouse-click <EM>viewport</EM>)</TT> <BR>
<TT>ready-mouse-click</TT> takes a viewport descriptor and returns
either a mouse click descriptor, or else <TT>#f</TT> if none is available.
Unlike the previous function, <EM>ready-mouse-click</EM> returns immediately.<LI> <A NAME=18642></A>
<TT>(ready-mouse-release <EM>viewport</EM>)</TT> <BR>
<TT>ready-mouse-release</TT> takes a viewport descriptor and returns
either a click descriptor from a mouse-release (button-up) event,
or else <TT>#f</TT> if none is available.<LI> <A NAME=18644></A>
<TT>(query-mouse-posn <EM>viewport</EM>)</TT> <BR>
<TT>query-mouse-posn</TT> takes a viewport descriptor and returns
either the position of the mouse cursor within the <EM>viewport</EM>,
or else <TT>#f</TT> if the cursor is currently outside the <EM>viewport</EM>.<LI> <A NAME=18646></A>
<TT>(mouse-click-posn <EM>mouse-click</EM>)</TT> <BR>
<TT>mouse-click-posn</TT> takes a mouse click descriptor and
returns the position of the pixel where the click occurred.<LI> <A NAME=18648></A>
<TT>(left-mouse-click? <EM>mouse-click</EM>)</TT> <BR>
<TT>left-mouse-click?</TT> takes a mouse click descriptor and returns
<TT>#t</TT> if the click occurred with the left mouse button,
or else <TT>#f</TT>.<LI> <A NAME=18650></A>
<TT>(middle-mouse-click? <EM>mouse-click</EM>)</TT> <BR>
Similar to <TT>left-mouse-click?</TT>.<LI> <A NAME=18652></A>
<TT>(right-mouse-click? <EM>mouse-click</EM>)</TT> <BR>
Similar to <TT>left-mouse-click?</TT>.<LI> <A NAME=18654></A>
<TT>(viewport-flush-input <EM>viewport</EM>)</TT> <BR>
As noted above, mouse clicks are buffered.
<TT>viewport-flush-input</TT> takes a viewport descriptor
and empties the input buffer of mouse and keyboard events.
This action is useful in some real-time applications.
It returns unspecified.
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<H2><A NAME="SECTION006410000000000000000">Keyboard Operations</A></H2>
<P>
The graphics library contains functions that report key presses
from the keyboard.
The functions <TT>get-key-press</TT> and <TT>ready-key-press</TT>
return a ``key-press descriptor,'' and then <TT>key-value</TT> takes
the descriptor and returns an integer for the key that was
pressed (usually the ASCII value).<A NAME="tex2html74" HREF="footnode.htm#18656"><IMG SRC="../icons/footnote.gif" WIDTH=15 HEIGHT=15 BORDER=0 ALIGN=BOTTOM ALT="[footnote]"></A>.
<P>
<UL><LI> <A NAME=18657></A>
<TT>(get-key-press <EM>viewport</EM>)</TT> <BR>
<TT>get-key-press</TT> takes a viewport descriptor and returns
a mouse click descriptor.
It returns the next mouse click in the <EM>viewport</EM>, waiting for a click
if necessary.<LI> <A NAME=18659></A>
<TT>(ready-key-press <EM>viewport</EM>)</TT> <BR>
<TT>ready-key-press</TT> takes a viewport descriptor and returns
either a mouse click descriptor, or else <TT>#f</TT> if none is available.
Unlike the previous function, <EM>ready-key-press</EM> returns immediately.<LI> <A NAME=18661></A>
<TT>(key-value <EM>key-press</EM>)</TT> <BR>
<TT>key-value</TT> takes a key press descriptor and returns
an integer for the key that was pressed. Usually this is the ASCII
value of a character. Special keys return other values as defined by
wxWindows, the primitive GUI toolbox. For example, the up arrow key is
represented by the constant <TT>wx:k-const-up</TT>.<LI> <A NAME=18663></A>
<TT>(viewport-flush-input <EM>viewport</EM>)</TT> <BR>
As noted above, key presses are buffered.
<TT>viewport-flush-input</TT> takes a viewport descriptor
and empties the input buffer of mouse and keyboard events.
This action is useful in some real-time applications.
It returns unspecified.
</UL><BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
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<BR> <P>
<H1><A NAME="SECTION00650000000000000000">Turtles</A></H1>
<P>
<A NAME="turtles"></A>
DrScheme supports a turtle graphics interface.
These are the turtle functions:
<P>
<UL><LI><TT>(turtles b)</TT><A NAME=18666></A>
shows and hides the turtles window based on the boolean <TT>b</TT>.
The parameter <TT>b</TT> is optional; if it is left out, it toggles the
state of the turtles.<LI><TT>(move n)</TT><A NAME=18668></A>
moves the turtle n pixels.<LI><TT>(draw n)</TT><A NAME=18670></A>
moves the turtle n pixels and draws a line on that path.<LI><TT>(erase n)</TT><A NAME=18672></A>
moves the turtle n pixels and erases along that path.
<P>
<A NAME=18673></A>
<A NAME=18674></A>
<A NAME=18675></A><LI> <TT>(move-offset h v)</TT>, <TT>(draw-offset h v)</TT>, <TT>(erase-offset h v)</TT>
are just like move, draw and erase, except they take a horizontal and
vertical offset from the turtle's current position.<LI> <TT>(turn theta)</TT><A NAME=18678></A>
turns the turtle theta degrees counter-clockwise.<LI> <TT>(turn/radians theta)</TT><A NAME=18680></A>
turns the turtle theta radians counter-clockwise.<LI><TT>(clear)</TT><A NAME=18682></A>
erases the turtles window.<LI><TT>(save-turtle-bitmap filename filetype)</TT><A NAME=18684></A>
saves the window to a bitmap file. The supported file types are:
<P>
<UL><LI> <TT>wx:const-bitmap-type-gif</TT> -- save a GIF bitmap file (X Windows, Windows, MacOS)<LI> <TT>wx:const-bitmap-type-xbm</TT> -- save an X bitmap file (X Windows, Windows, MacOS)<LI> <TT>wx:const-bitmap-type-xpm</TT> -- save an XPM bitmap file (X Windows, Windows, MacOS)<LI> <TT>wx:const-bitmap-type-bmp</TT> -- save a Windows bitmap file (X Windows, Windows, MacOS)<LI> <TT>wx:const-bitmap-type-bmp-resource</TT> -- save a Windows bitmap from the resource database (Windows)<LI> <TT>wx:const-bitmap-type-pict</TT> -- save a PICT bitmap file (MacOS)<LI> <TT>wx:const-bitmap-type-pict-resource</TT> -- save a PICT resource (MacOS)
</UL></UL>
<P>
Turtles also adds these syntactic forms:
<P>
<UL><LI><TT>(split E)</TT><A NAME=18686></A>
spawns a new turtle where
the turtle is currently located. In order to distinguish the two turtles,
only the new one evaluates the expression E. For example, if you start
with a fresh turtle-window and type:
<P>
<P CENTER><TT>(split (turn/radians (/ pi 2)))</TT>
<P>
you will have two turtles, pointing at right angles to each other.
To see that, try this:
<P>
<P CENTER><TT>(draw 100)</TT>
<P>
You will see two lines. Now, if you evaluate those two expression
again, you will have four turtles, etc<LI><TT>(split* E...)</TT><A NAME=18690></A>
The form split* is similar to split, except it creates as many turtles as
there are expressions and each turtles does one of the expression. For
example, to create two turtles, one pointing at <IMG WIDTH=24 HEIGHT=24 ALIGN=MIDDLE ALT="tex2html_wrap_inline6234" SRC="img7.gif" > and one at
<IMG WIDTH=24 HEIGHT=24 ALIGN=MIDDLE ALT="tex2html_wrap_inline6236" SRC="img8.gif" > , evaluate this:
<P>
<TT>(split* (turn/radians (/ pi 3)) (turn/radians (/ pi 2)))</TT><LI><TT>(tprompt E...)</TT><A NAME=18692></A>
<P>
tprompt provides a way to limit the splitting of the turtles. Before
the expression E is run, the state of the turtles (how many, their
positions and headings) is "checkpointed," then E is evaluated and
the state of the turtles is restored, but all drawing that may have
occured during execution of E remains.
<P>
For example, if you do this:
<P>
<P CENTER><TT>(tprompt (draw 100))</TT>
<P>
the turtle will move forward 100 pixels, draw a line there and then
be immediately put back in it's original position. Also, if you do this:
<P>
<P CENTER><TT>(tprompt (split (turn/radians (/ pi 2))))</TT>
<P>
the turtle will split into two turtles, one will turn 90 degrees and then
the turtles will be put back into their original state - as if the split
never took place.
<P>
The fern functions below demonstrate more advanced use of tprompt.
</UL>
<P>
In the file ``turex.ss'' in the ``graphics'' library of your PLT
distribution, you will find these functions and values defined, as example
turtle programs. (The file is located in the ``graphics'' subdirectory of
the ``collects'' subdirectory of the ``mred'' subdirectory of the PLT
distribution).
<P>
<UL><LI><TT>(regular-poly sides radius)</TT>
draws a regular poly centered at the turtle with
sides sides and with radius radius.<LI><TT>(regular-polys sides s)</TT>
draws s regular polys spaced evenly outwards with sides sides.<LI><TT>(radial-turtles n)</TT>
places <IMG WIDTH=14 HEIGHT=11 ALIGN=BOTTOM ALT="tex2html_wrap_inline6238" SRC="img9.gif" > turtles spaced evenly pointing radially outward<LI><TT>(spaced-turtles n)</TT>
places <IMG WIDTH=14 HEIGHT=11 ALIGN=BOTTOM ALT="tex2html_wrap_inline6238" SRC="img9.gif" > turtles pointing in the same direction as the original turtle
evenly spaced in a line.<LI><TT>(spokes)</TT>
draws some spokes, using raidial-turtles and spaced-turtles<LI><TT>(spyro-gyra)</TT>
draws a spyro-grya reminicent shape<LI><TT>(neato)</TT>
as the name says...<LI><TT>(grapics-bexam)</TT>
draws a fractal that came up on an exam I took.<LI><TT>serp-size</TT>
a constant which is a good size for the serp procedures
<P>
<A NAME=14575></A><LI><TT>(serp serp-size)</TT>, <TT>(serp-nosplit serp-size)</TT>
draws the Serpinski triangle in two different ways, the first using split
heavily. After running the first one, try executing
<TT>(draw 10)</TT>.<LI><TT>koch-size</TT>
a constant which is a good size for the koch procedures
<P>
<A NAME=14580></A><LI><TT>(koch-split koch-size)</TT>,<TT>(koch-draw koch-size)</TT>
draws the same koch snowflake in two different ways.
<P>
<A NAME=14583></A>
<A NAME=14584></A><LI><TT>(lorenz a b c)</TT>
watch the lorenz "butterfly" attractor with inital values a b and c.<LI><TT>(lorenz1)</TT>
a good setting for the lorenz attractor
<P>
<A NAME=14587></A><LI><TT>(peano1 peano-size)</TT>
<P>
This will draw the Peano space-filling curve, using split.<LI><TT>(peano2 peano-size)</TT>
<P>
This will draw the Peano space-filling curve, without using split.
<P>
<A NAME=14590></A><LI><TT>fern-size</TT>
a good size for the fern functions<LI><TT>(fern1 fern-size)</TT>
You will probably want to point the turtle up before running
this one, with something like:
<P>
<TT>(turn/radians (- (/ pi 2)))</TT><LI><TT>(fern2 fern-size)</TT>
a fern - you may need to backup a little for this one.
<P>
</UL></P></P></P></P><HR><A NAME="tex2html1046" HREF="node55.htm"><IMG SRC="../icons/left.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[previous]"></A> <A NAME="tex2html1052" HREF="node32.htm"><IMG SRC="../icons/up.gif" WIDTH=30 HEIGHT=29 BORDER=0 ALIGN=BOTTOM ALT="[up]"></A> <A NAME="tex2html1054" HREF="node57.htm"><IMG SRC="../icons/right.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[next]"></A>     <A NAME="tex2html1056" HREF="node3.htm"><IMG SRC="../icons/contents.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[contents]"></A> <A NAME="tex2html1057" HREF="node110.htm"><IMG SRC="../icons/index.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[index]"></A><BR>
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<H1><A NAME="SECTION00660000000000000000">MrEd Toolbox</A></H1>
<P>
In addition to the graphics capabilities described above, DrScheme also
has the entire <A NAME="tex2html99" HREF="../toolbox/index.html">MrEd Toolbox</A>
available.
<P>
<BR> <HR>
<P><ADDRESS>
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<H1><A NAME="SECTION00670000000000000000">Printer</A></H1>
<P>
<A NAME=14603></A> <A NAME=14604></A>
DrScheme's contructors style printer treats <TT>cons</TT>, <TT>vector</TT>,
and similar primitives as value constructors, rather than functions. It
also treats <TT>list</TT> as shorthand for multiple <TT>cons</TT>'s ending with
the null list. So, when values are printed, they look different from usual
scheme implementations. This table details all of the differences between
MzScheme's and DrScheme's printed values.
<P>
<P> <IMG WIDTH=501 HEIGHT=300 ALIGN=BOTTOM ALT="tabular1148" SRC="img10.gif" > <P>
<P>
DrScheme's printer can be confusing if you are accustomed to the
traditional Scheme printer. Just remember that the output syntax for
drscheme matches the standard Scheme input syntax.
<P>
The printer is not as useful if you are using
s-expressions to represent programs. For example, the value
<TT>'(lambda (x) (lambda (y) (+ x y)))</TT> will print as
<P>
<TT>(lambda (x) (lambda (y) (+ x y)))</TT>
<P>
in MzScheme, but will print as
<P>
<TT>(list 'lambda (list 'x) (list 'lambda (list 'y) (list '+ 'x 'y)))</TT>
<P>
in DrScheme. For those programs, you should use the Quasiquote style
printer. Use the <I>Language</I> <IMG WIDTH=2 HEIGHT=24 ALIGN=MIDDLE ALT="tex2html_wrap_inline6218" SRC="img4.gif" > <I>Configure Language</I> dialog to change
the printer style.
The Quasiquote style printer uses quasiquote to print lists, and uses
unquote to escape back to constructor style printing for non-lists, and
non-symbols. The above example prints as:
<TT>`(lambda (x) (lambda (y) (+ x y)))</TT>
<BR> <HR>
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<H1><A NAME="SECTION00700000000000000000">Libraries</A></H1>
<P>
<A NAME="constructinglibraries"></A>
Libraries are the simpler of the two forms of extensibility in DrScheme.
They are designed for courses, where you want to extend the language of
DrScheme with some new functions on a temporary basis, and to let the
student control which sets of functions are available at any given time.
<P>
Each library must have a file whose last expression evaluates to a unit/sig
that imports the <TT>plt:userspace</TT><code>^</code> signature. That file is the
file that the users select when installing the library. The names in the export
signature of that unit are added to the users namespace, via
<TT>invoke-open-unit/sig</TT>. (See <A HREF="../mzscheme/node54.htm#mzunits">units</A> for more
information.)
<P>
The <TT>plt:userspace</TT><code>^</code> signature contains MzLib's pretty print, file,
function, compat, and string libraries
(see <A HREF="../mzscheme/node162.htm#mzmzlib">MzLib</A>).
It also contains the
<A HREF="node37.htm#graphics">graphics library</A>,
the
<A HREF="node56.htm#turtles">turtle library</A>,
and all of the names defined in the
<A NAME="tex2html102" HREF="../toolbox/index.html">toolbox manual</A>.
<P>
For example, this unit/sig defines a library which adds the binding `four'
to the users namespace:
<PRE>(unit/sig (four)
(import plt:userspace^)
(define four 4))</PRE>
<P>
See
<A HREF="node23.htm#selectinglibraries">selecting libraries</A>
for more information.
<P>
<BR> <HR>
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<H1><A NAME="SECTION00800000000000000000">Tools</A></H1>
<P>
Tools are designed for major extensions in DrScheme's functionality. To
extend DrScheme to extend the appearance or the functionality the DrScheme
window (say, to annotate programs in certain ways, or to add buttons on the
frame) use a tool. The Static Debugger and the Syntax Checker are
implemented as tools.
<P>
Libraries are for extensions of DrScheme that only want to add new
functions and other values bound in the users namespace.
See section <A HREF="node59.htm#constructinglibraries"><IMG SRC="../icons/crossref.gif" WIDTH=13 HEIGHT=13 BORDER=0 ALIGN=BOTTOM ALT="[cross-reference]"></A> for more information on
constructing libraries.
<P>
Tools rely heavily on MzScheme's units. See <A HREF="../mzscheme/node54.htm#mzunits">units</A>
for information on how to construct units. They also require understanding
of <A HREF="../mzscheme/node162.htm#mzmzlib">libraries and collections</A>
<P>
When DrScheme starts up, it looks in the tools subdirectory of the
<TT><B>drscheme</TT></B> collection directory to determine which tools are installed.
For each subdirectory of the tools directory, it looks for two files:
unit.ss and sig.ss. If sig.ss exists it is loaded when all of the
signatures of DrScheme are loaded. The file unit.ss is required to exist.
It must evaluate to a unit that imports 6 units matching the signatures:
<TT>wx^</TT> (all of the names in <A NAME="tex2html104" HREF="../toolbox/index.html">toolbox manual</A> beginning with <TT>wx</TT>).
<TT>mred^</TT> (all of the names in the <A NAME="tex2html105" HREF="../toolbox/index.html">toolbox manual</A> beginning with <TT>mred:</TT>)
<TT>mzlib:core^</TT> and <TT>mzlib:print-convert^</TT> (defined in the
<A HREF="../mzscheme/node162.htm#mzmzlib">MzLib</A>), <TT>drscheme:export^</TT> (defined below),
and <TT>zodiac:system^</TT> (defined in <A NAME="tex2html103" HREF="../m3/index.htm"><I>PLT McMicMac: Parser Manual</I></A>).
<P>
The <TT>drscheme:export^</TT> signature contains the parameters defined
in <A HREF="node99.htm#drsparameters">the parameters section</A>,
and the other classes described in the next subsections.
<P>
For example,
<PRE>(unit/sig ()
(import [wx : wx^]
[mred : mred^]
[mzlib : mzlib:core^]
[print-convert : mzlib:print-convert^]
[drscheme : drscheme:export^]
[zodiac : zodiac:system^])
(mred:message-box "tool loaded"))</PRE>
<P>
is a simple tool that opens a dialog as drscheme is started up.
<P>
<BR> <HR>
<UL>
<LI> <A NAME="tex2html1104" HREF="node61.htm"><TT>drscheme:rep:edit%</TT></A>
<LI> <A NAME="tex2html1105" HREF="node72.htm"><TT>drscheme:unit:definitions-canvas%</TT></A>
<LI> <A NAME="tex2html1106" HREF="node75.htm"><TT>drscheme:unit:frame%</TT></A>
<LI> <A NAME="tex2html1107" HREF="node89.htm"><TT>drscheme:unit:interactions-canvas%</TT></A>
<LI> <A NAME="tex2html1108" HREF="node90.htm">Processing Programs with Zodiac</A>
<LI> <A NAME="tex2html1109" HREF="node99.htm">Extending the DrScheme Classes</A>
</UL>
<BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
</BODY>
</HTML>
plt-doc-53/collects/doc/drscheme/node61.htm 100644 46062 1213 152042 6556126627 15365 0 ustar <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
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<HTML>
<HEAD>
<TITLE>drscheme:rep:edit</TITLE>
<META NAME="description" CONTENT="drscheme:rep:edit">
<META NAME="keywords" CONTENT="drs">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<LINK REL=STYLESHEET HREF="drs.css">
</HEAD>
<BODY LANG="EN" >
<A NAME="tex2html1110" HREF="node60.htm"><IMG SRC="../icons/left.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[previous]"></A> <A NAME="tex2html1116" HREF="node60.htm"><IMG SRC="../icons/up.gif" WIDTH=30 HEIGHT=29 BORDER=0 ALIGN=BOTTOM ALT="[up]"></A> <A NAME="tex2html1118" HREF="node62.htm"><IMG SRC="../icons/right.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[next]"></A>     <A NAME="tex2html1120" HREF="node3.htm"><IMG SRC="../icons/contents.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[contents]"></A> <A NAME="tex2html1121" HREF="node110.htm"><IMG SRC="../icons/index.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[index]"></A><BR>
<B> Next:</B> <A NAME="tex2html1119" HREF="node62.htm">break</A>
<B>Up:</B> <A NAME="tex2html1117" HREF="node60.htm">Tools</A>
<B> Previous:</B> <A NAME="tex2html1111" HREF="node60.htm">Tools</A>
<BR> <P>
<H1><A NAME="SECTION00810000000000000000"><TT>drscheme:rep:edit%</TT></A></H1>
<A NAME=18723></A> <A NAME="classdrschemerepedit"></A> Superclass: <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><A NAME=18725></A>
<P>
User submitted evaluations in DrScheme are evaluated asynchronously.
<P>
<UL><LI> <TT>(make-object drscheme:rep:edit% <EM>line-spacing</EM> <EM>tabstops</EM> <EM>numtabs</EM>)</TT> <TT>-></TT> <I><A HREF="node61.htm#classdrschemerepedit"><TT>drscheme:rep:edit%</TT></A> object</I>
<BR>     <EM>line-spacing = <TT>1.0</TT></EM> : <I>inexact real</I>
<BR>     <EM>tabstops = <TT>null</TT></EM> : <I>boxed inexact real or <TT>null</TT></I>
<BR>     <EM>numtabs = <TT>0</TT></EM> : <I>small integer</I>
<P>
<BR>
</UL>
Methods:
<UL><LI> <A HREF="node62.htm#methoddrschemerepeditbreak"><TT>break</TT></A><LI> <A HREF="node63.htm#methoddrschemerepeditdisplayresult"><TT>display-result</TT></A><LI> <A HREF="node64.htm#methoddrschemerepeditdoeval"><TT>do-eval</TT></A><LI> <A HREF="node65.htm#methoddrschemerepeditdomanybufferevals"><TT>do-many-buffer-evals</TT></A><LI> <A HREF="node66.htm#methoddrschemerepeditinitializeconsole"><TT>initialize-console</TT></A><LI> <A HREF="node67.htm#methoddrschemerepeditreporterror"><TT>report-error</TT></A><LI> <A HREF="node68.htm#methoddrschemerepeditresetconsole"><TT>reset-console</TT></A><LI> <A HREF="node69.htm#methoddrschemerepeditruninevaluationthread"><TT>run-in-evaluation-thread</TT></A><LI> <A HREF="node70.htm#methoddrschemerepeditsystemparameterization"><TT>system-parameterization</TT></A><LI> <A HREF="node71.htm#methoddrschemerepedituserparam"><TT>user-param</TT></A>
</UL>
All methods:
<UL><LI> <A HREF="../toolbox/node252.htm#methodmredconsoleeditCACHETIME"><TT>CACHE-TIME</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node253.htm#methodmredconsoleeditMAXCACHETIME"><TT>MAX-CACHE-TIME</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node254.htm#methodmredconsoleeditMINCACHETIME"><TT>MIN-CACHE-TIME</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node255.htm#methodmredconsoleeditTIMEFACTOR"><TT>TIME-FACTOR</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node228.htm#methodmredconnectionsmediaeditactivecanvas"><TT>active-canvas</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node1448.htm#methodwxmediabufferaddbufferfunctions"><TT>add-buffer-functions</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node229.htm#methodmredconnectionsmediaeditaddcanvas"><TT>add-canvas</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node1574.htm#methodwxmediaeditaddeditorfunctions"><TT>add-editor-functions</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1449.htm#methodwxmediabufferadjustcursor"><TT>adjust-cursor</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node559.htm#methodmredmediaeditafterchangestyle"><TT>after-change-style</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node488.htm#methodmredinfoeditafterdelete"><TT>after-delete</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node489.htm#methodmredinfoeditaftereditsequence"><TT>after-edit-sequence</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node490.htm#methodmredinfoeditafterinsert"><TT>after-insert</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node350.htm#methodmredfileeditafterloadfile"><TT>after-load-file</TT></A> from <A HREF="../toolbox/node349.htm#classmredfileedit"><TT>mred:file-edit%</TT></A><LI> <A HREF="../toolbox/node351.htm#methodmredfileeditaftersavefile"><TT>after-save-file</TT></A> from <A HREF="../toolbox/node349.htm#classmredfileedit"><TT>mred:file-edit%</TT></A><LI> <A HREF="../toolbox/node491.htm#methodmredinfoeditaftersetposition"><TT>after-set-position</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node564.htm#methodmredmediaeditaftersetsizeconstraint"><TT>after-set-size-constraint</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1453.htm#methodwxmediabufferappendedititems"><TT>append-edit-items</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1454.htm#methodwxmediabufferappendfontitems"><TT>append-font-items</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node95.htm#methodmredbackupautosaveeditautosave"><TT>auto-save?</TT></A> from <A HREF="../toolbox/node94.htm#classmredbackupautosaveedit"><TT>mred:backup-autosave-edit%</TT></A><LI> <A HREF="../toolbox/node565.htm#methodmredmediaeditautosetwrap"><TT>auto-set-wrap?</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node256.htm#methodmredconsoleeditautoprompting"><TT>autoprompting?</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node352.htm#methodmredfileeditautowrapbitmap"><TT>autowrap-bitmap</TT></A> from <A HREF="../toolbox/node349.htm#classmredfileedit"><TT>mred:file-edit%</TT></A><LI> <A HREF="../toolbox/node96.htm#methodmredbackupautosaveeditbackup"><TT>backup?</TT></A> from <A HREF="../toolbox/node94.htm#classmredbackupautosaveedit"><TT>mred:backup-autosave-edit%</TT></A><LI> <A HREF="../toolbox/node1455.htm#methodwxmediabufferbegineditsequence"><TT>begin-edit-sequence</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1456.htm#methodwxmediabufferbeginwriteheaderfootertofile"><TT>begin-write-header-footer-to-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="node62.htm#methoddrschemerepeditbreak"><TT>break</TT></A><LI> <A HREF="../toolbox/node1457.htm#methodwxmediabufferbufferlocationtodclocation"><TT>buffer-location-to-dc-location</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node230.htm#methodmredconnectionsmediaeditcanvases"><TT>canvases</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node1580.htm#methodwxmediaeditcarethidden"><TT>caret-hidden?</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1581.htm#methodwxmediaeditchangestyle"><TT>change-style</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node257.htm#methodmredconsoleeditcleanuptransparentio"><TT>cleanup-transparent-io</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1459.htm#methodwxmediabufferclear"><TT>clear</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1460.htm#methodwxmediabufferclearundos"><TT>clear-undos</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1582.htm#methodwxmediaeditcopy"><TT>copy</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node258.htm#methodmredconsoleeditcopynextpreviousexpr"><TT>copy-next-previous-expr</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node259.htm#methodmredconsoleeditcopyprevpreviousexpr"><TT>copy-prev-previous-expr</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node260.htm#methodmredconsoleeditcopypreviousexpr"><TT>copy-previous-expr</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1462.htm#methodwxmediabuffercopyself"><TT>copy-self</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1583.htm#methodwxmediaeditcopyselfto"><TT>copy-self-to</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1584.htm#methodwxmediaeditcut"><TT>cut</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1465.htm#methodwxmediabufferdclocationtobufferlocation"><TT>dc-location-to-buffer-location</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1585.htm#methodwxmediaeditdelete"><TT>delete</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node261.htm#methodmredconsoleeditdisplaydelta"><TT>display-delta</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="node63.htm#methoddrschemerepeditdisplayresult"><TT>display-result</TT></A><LI> <A HREF="../toolbox/node97.htm#methodmredbackupautosaveeditdoautosave"><TT>do-autosave</TT></A> from <A HREF="../toolbox/node94.htm#classmredbackupautosaveedit"><TT>mred:backup-autosave-edit%</TT></A><LI> <A HREF="../toolbox/node1586.htm#methodwxmediaeditdocopy"><TT>do-copy</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1466.htm#methodwxmediabufferdoedit"><TT>do-edit</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="node64.htm#methoddrschemerepeditdoeval"><TT>do-eval</TT></A><LI> <A HREF="../toolbox/node1467.htm#methodwxmediabufferdofont"><TT>do-font</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="node65.htm#methoddrschemerepeditdomanybufferevals"><TT>do-many-buffer-evals</TT></A><LI> <A HREF="../toolbox/node1587.htm#methodwxmediaeditdopaste"><TT>do-paste</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node264.htm#methodmredconsoleeditdoposteval"><TT>do-post-eval</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node265.htm#methodmredconsoleeditdopreeval"><TT>do-pre-eval</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node266.htm#methodmredconsoleeditdosaveandevalorreadavail"><TT>do-save-and-eval-or-read-avail</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node353.htm#methodmredfileediteditingthisfile"><TT>editing-this-file?</TT></A> from <A HREF="../toolbox/node349.htm#classmredfileedit"><TT>mred:file-edit%</TT></A><LI> <A HREF="../toolbox/node267.htm#methodmredconsoleeditenableautoprompt"><TT>enable-autoprompt</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1468.htm#methodwxmediabufferendeditsequence"><TT>end-edit-sequence</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1469.htm#methodwxmediabufferendwriteheaderfootertofile"><TT>end-write-header-footer-to-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1588.htm#methodwxmediaediterase"><TT>erase</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node268.htm#methodmredconsoleediterrordelta"><TT>error-delta</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node269.htm#methodmredconsoleeditevalanddisplay"><TT>eval-and-display</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node270.htm#methodmredconsoleeditevalbusy"><TT>eval-busy?</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node271.htm#methodmredconsoleeditevalstr"><TT>eval-str</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node568.htm#methodmredmediaeditextendeditsequencequeue"><TT>extend-edit-sequence-queue</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1589.htm#methodwxmediaeditfindline"><TT>find-line</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1590.htm#methodwxmediaeditfindposition"><TT>find-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1591.htm#methodwxmediaeditfindpositioninline"><TT>find-position-in-line</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node272.htm#methodmredconsoleeditfindprompt"><TT>find-prompt</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1470.htm#methodwxmediabufferfindscrollline"><TT>find-scroll-line</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1592.htm#methodwxmediaeditfindsnip"><TT>find-snip</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1593.htm#methodwxmediaeditfindstring"><TT>find-string</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1594.htm#methodwxmediaeditfindstringall"><TT>find-string-all</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node828.htm#methodmredsearchingeditfindstringembedded"><TT>find-string-embedded</TT></A> from <A HREF="../toolbox/node827.htm#classmredsearchingedit"><TT>mred:searching-edit%</TT></A><LI> <A HREF="../toolbox/node1595.htm#methodwxmediaeditfindwordbreak"><TT>find-wordbreak</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1596.htm#methodwxmediaeditflashoff"><TT>flash-off</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1597.htm#methodwxmediaeditflashon"><TT>flash-on</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node273.htm#methodmredconsoleeditgenericwrite"><TT>generic-write</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1471.htm#methodwxmediabuffergetadmin"><TT>get-admin</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1598.htm#methodwxmediaeditgetanchor"><TT>get-anchor</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1599.htm#methodwxmediaeditgetbetweenthreshold"><TT>get-between-threshold</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node231.htm#methodmredconnectionsmediaeditgetcanvas"><TT>get-canvas</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node1600.htm#methodwxmediaeditgetcharacter"><TT>get-character</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1472.htm#methodwxmediabuffergetdc"><TT>get-dc</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1473.htm#methodwxmediabuffergetdescent"><TT>get-descent</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node569.htm#methodmredmediaeditgeteditsnip"><TT>get-edit-snip</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1601.htm#methodwxmediaeditgetendposition"><TT>get-end-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1474.htm#methodwxmediabuffergetextent"><TT>get-extent</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node570.htm#methodmredmediaeditgetfile"><TT>get-file</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1602.htm#methodwxmediaeditgetfileformat"><TT>get-file-format</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1476.htm#methodwxmediabuffergetfilename"><TT>get-filename</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1477.htm#methodwxmediabuffergetflattenedtext"><TT>get-flattened-text</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1478.htm#methodwxmediabuffergetfocussnip"><TT>get-focus-snip</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node232.htm#methodmredconnectionsmediaeditgetframe"><TT>get-frame</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node1479.htm#methodwxmediabuffergetinactivefocusthreshold"><TT>get-inactive-focus-threshold</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1480.htm#methodwxmediabuffergetkeymap"><TT>get-keymap</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1481.htm#methodwxmediabuffergetloadoverwritesstyles"><TT>get-load-overwrites-styles</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1482.htm#methodwxmediabuffergetmaxheight"><TT>get-max-height</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1483.htm#methodwxmediabuffergetmaxundohistory"><TT>get-max-undo-history</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1484.htm#methodwxmediabuffergetmaxwidth"><TT>get-max-width</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1485.htm#methodwxmediabuffergetminheight"><TT>get-min-height</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1486.htm#methodwxmediabuffergetminwidth"><TT>get-min-width</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1603.htm#methodwxmediaeditgetoverwritemode"><TT>get-overwrite-mode</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node571.htm#methodmredmediaeditgetpasteboardsnip"><TT>get-pasteboard-snip</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1604.htm#methodwxmediaeditgetposition"><TT>get-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node274.htm#methodmredconsoleeditgetprompt"><TT>get-prompt</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1605.htm#methodwxmediaeditgetregiondata"><TT>get-region-data</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1487.htm#methodwxmediabuffergetsnipdata"><TT>get-snip-data</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1488.htm#methodwxmediabuffergetsniplocation"><TT>get-snip-location</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1606.htm#methodwxmediaeditgetsnipposition"><TT>get-snip-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1607.htm#methodwxmediaeditgetsnippositionandlocation"><TT>get-snip-position-and-location</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1489.htm#methodwxmediabuffergetspace"><TT>get-space</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1608.htm#methodwxmediaeditgetstartposition"><TT>get-start-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1490.htm#methodwxmediabuffergetstylelist"><TT>get-style-list</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1609.htm#methodwxmediaeditgettabs"><TT>get-tabs</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1610.htm#methodwxmediaeditgettext"><TT>get-text</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1491.htm#methodwxmediabuffergetviewsize"><TT>get-view-size</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1611.htm#methodwxmediaeditgetvisiblelinerange"><TT>get-visible-line-range</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1612.htm#methodwxmediaeditgetvisiblepositionrange"><TT>get-visible-position-range</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1613.htm#methodwxmediaeditgetwordbreakmap"><TT>get-wordbreak-map</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1492.htm#methodwxmediabufferglobaltolocal"><TT>global-to-local</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1614.htm#methodwxmediaedithidecaret"><TT>hide-caret</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node572.htm#methodmredmediaedithighlightrange"><TT>highlight-range</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node275.htm#methodmredconsoleeditinittransparentio"><TT>init-transparent-io</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node276.htm#methodmredconsoleeditinittransparentiodowork"><TT>init-transparent-io-do-work</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="node66.htm#methoddrschemerepeditinitializeconsole"><TT>initialize-console</TT></A><LI> <A HREF="../toolbox/node1615.htm#methodwxmediaeditinsert"><TT>insert</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1494.htm#methodwxmediabufferinsertbox"><TT>insert-box</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1495.htm#methodwxmediabufferinsertfile"><TT>insert-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1496.htm#methodwxmediabufferinsertimage"><TT>insert-image</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node278.htm#methodmredconsoleeditinsertprompt"><TT>insert-prompt</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1497.htm#methodwxmediabufferinvalidatebitmapcache"><TT>invalidate-bitmap-cache</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node279.htm#methodmredconsoleeditioeditPRECENT"><TT>io-edit%</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1616.htm#methodwxmediaeditkill"><TT>kill</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node280.htm#methodmredconsoleeditkillallowprotected"><TT>kill-allow-protected</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node281.htm#methodmredconsoleeditkillprotect"><TT>kill-protect</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1617.htm#methodwxmediaeditlastline"><TT>last-line</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1618.htm#methodwxmediaeditlastparagraph"><TT>last-paragraph</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1619.htm#methodwxmediaeditlastposition"><TT>last-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1620.htm#methodwxmediaeditlineendposition"><TT>line-end-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1621.htm#methodwxmediaeditlinelength"><TT>line-length</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1622.htm#methodwxmediaeditlinelocation"><TT>line-location</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1623.htm#methodwxmediaeditlineparagraph"><TT>line-paragraph</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1624.htm#methodwxmediaeditlinestartposition"><TT>line-start-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node573.htm#methodmredmediaeditloadfile"><TT>load-file</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node574.htm#methodmredmediaeditlocaleditsequence"><TT>local-edit-sequence?</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1500.htm#methodwxmediabufferlocaltoglobal"><TT>local-to-global</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node492.htm#methodmredinfoeditlock"><TT>lock</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node575.htm#methodmredmediaeditlocked"><TT>locked?</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node282.htm#methodmredconsoleeditmakethiserr"><TT>make-this-err</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node283.htm#methodmredconsoleeditmakethisout"><TT>make-this-out</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node284.htm#methodmredconsoleeditmaxsavepreviousexprs"><TT>max-save-previous-exprs</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node576.htm#methodmredmediaeditmode"><TT>mode</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1502.htm#methodwxmediabuffermodified"><TT>modified?</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1625.htm#methodwxmediaeditmoveposition"><TT>move-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node577.htm#methodmredmediaeditmovecopytoedit"><TT>move/copy-to-edit</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1503.htm#methodwxmediabufferneedsupdate"><TT>needs-update</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node285.htm#methodmredconsoleeditnormaldelta"><TT>normal-delta</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node286.htm#methodmredconsoleeditnormalfont"><TT>normal-font</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1504.htm#methodwxmediabuffernumscrolllines"><TT>num-scroll-lines</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1505.htm#methodwxmediabufferonchange"><TT>on-change</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node578.htm#methodmredmediaeditonchangestyle"><TT>on-change-style</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1506.htm#methodwxmediabufferonchar"><TT>on-char</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node98.htm#methodmredbackupautosaveeditonclose"><TT>on-close</TT></A> from <A HREF="../toolbox/node94.htm#classmredbackupautosaveedit"><TT>mred:backup-autosave-edit%</TT></A><LI> <A HREF="../toolbox/node1507.htm#methodwxmediabufferondefaultchar"><TT>on-default-char</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1508.htm#methodwxmediabufferondefaultevent"><TT>on-default-event</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node580.htm#methodmredmediaeditondelete"><TT>on-delete</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node493.htm#methodmredinfoeditoneditsequence"><TT>on-edit-sequence</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node1510.htm#methodwxmediabufferonevent"><TT>on-event</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node582.htm#methodmredmediaeditonfocus"><TT>on-focus</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node583.htm#methodmredmediaeditoninsert"><TT>on-insert</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node354.htm#methodmredfileeditonkillfocus"><TT>on-kill-focus</TT></A> from <A HREF="../toolbox/node349.htm#classmredfileedit"><TT>mred:file-edit%</TT></A><LI> <A HREF="../toolbox/node1512.htm#methodwxmediabufferonloadfile"><TT>on-load-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node287.htm#methodmredconsoleeditonlocalchar"><TT>on-local-char</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node584.htm#methodmredmediaeditonlocalevent"><TT>on-local-event</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node585.htm#methodmredmediaeditonnewbox"><TT>on-new-box</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1516.htm#methodwxmediabufferonnewimagesnip"><TT>on-new-image-snip</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1629.htm#methodwxmediaeditonnewtabsnip"><TT>on-new-tab-snip</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1630.htm#methodwxmediaeditonnewtextsnip"><TT>on-new-text-snip</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1517.htm#methodwxmediabufferonpaint"><TT>on-paint</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node207.htm#methodmredcleverfileformateditonsavefile"><TT>on-save-file</TT></A> from <A HREF="../toolbox/node205.htm#classmredcleverfileformatedit"><TT>mred:clever-file-format-edit%</TT></A><LI> <A HREF="../toolbox/node355.htm#methodmredfileeditonsetfocus"><TT>on-set-focus</TT></A> from <A HREF="../toolbox/node349.htm#classmredfileedit"><TT>mred:file-edit%</TT></A><LI> <A HREF="../toolbox/node586.htm#methodmredmediaeditonsetsizeconstraint"><TT>on-set-size-constraint</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node288.htm#methodmredconsoleeditorigstderr"><TT>orig-stderr</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node289.htm#methodmredconsoleeditorigstdout"><TT>orig-stdout</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1519.htm#methodwxmediabufferowncaret"><TT>own-caret</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1632.htm#methodwxmediaeditparagraphendline"><TT>paragraph-end-line</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1633.htm#methodwxmediaeditparagraphendposition"><TT>paragraph-end-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1634.htm#methodwxmediaeditparagraphstartline"><TT>paragraph-start-line</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1635.htm#methodwxmediaeditparagraphstartposition"><TT>paragraph-start-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1636.htm#methodwxmediaeditpaste"><TT>paste</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1637.htm#methodwxmediaeditpositionline"><TT>position-line</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1638.htm#methodwxmediaeditpositionlocation"><TT>position-location</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1639.htm#methodwxmediaeditpositionparagraph"><TT>position-paragraph</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node290.htm#methodmredconsoleeditpreviousexprpos"><TT>previous-expr-pos</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node291.htm#methodmredconsoleeditpreviousexprs"><TT>previous-exprs</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1521.htm#methodwxmediabufferprint"><TT>print</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node292.htm#methodmredconsoleeditpromptmode"><TT>prompt-mode?</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node293.htm#methodmredconsoleeditpromptposition"><TT>prompt-position</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node587.htm#methodmredmediaeditputfile"><TT>put-file</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node294.htm#methodmredconsoleeditreadavail"><TT>read-avail</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1523.htm#methodwxmediabufferreadfooterfromfile"><TT>read-footer-from-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1640.htm#methodwxmediaeditreadfromfile"><TT>read-from-file</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1525.htm#methodwxmediabufferreadheaderfromfile"><TT>read-header-from-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node295.htm#methodmredconsoleeditreadwaiting"><TT>read-waiting?</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node296.htm#methodmredconsoleeditreadynonprompt"><TT>ready-non-prompt</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1526.htm#methodwxmediabufferredo"><TT>redo</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1527.htm#methodwxmediabufferrefresh"><TT>refresh</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1528.htm#methodwxmediabufferrefreshdelayed"><TT>refresh-delayed?</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node99.htm#methodmredbackupautosaveeditremoveautosave"><TT>remove-autosave</TT></A> from <A HREF="../toolbox/node94.htm#classmredbackupautosaveedit"><TT>mred:backup-autosave-edit%</TT></A><LI> <A HREF="../toolbox/node235.htm#methodmredconnectionsmediaeditremovecanvas"><TT>remove-canvas</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node1641.htm#methodwxmediaeditremoveclickback"><TT>remove-clickback</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="node67.htm#methoddrschemerepeditreporterror"><TT>report-error</TT></A><LI> <A HREF="node68.htm#methoddrschemerepeditresetconsole"><TT>reset-console</TT></A><LI> <A HREF="../toolbox/node1529.htm#methodwxmediabufferresized"><TT>resized</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node298.htm#methodmredconsoleeditresultdelta"><TT>result-delta</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node588.htm#methodmredmediaeditrunaftereditsequence"><TT>run-after-edit-sequence</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="node69.htm#methoddrschemerepeditruninevaluationthread"><TT>run-in-evaluation-thread</TT></A><LI> <A HREF="../toolbox/node1530.htm#methodwxmediabuffersavefile"><TT>save-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1531.htm#methodwxmediabufferscrolllinelocation"><TT>scroll-line-location</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1532.htm#methodwxmediabufferscrollto"><TT>scroll-to</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1642.htm#methodwxmediaeditscrolltoposition"><TT>scroll-to-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1533.htm#methodwxmediabufferselectall"><TT>select-all</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1534.htm#methodwxmediabuffersetadmin"><TT>set-admin</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node494.htm#methodmredinfoeditsetanchor"><TT>set-anchor</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node589.htm#methodmredmediaeditsetautosetwrap"><TT>set-auto-set-wrap</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1644.htm#methodwxmediaeditsetautowrapbitmap"><TT>set-autowrap-bitmap</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1645.htm#methodwxmediaeditsetbetweenthreshold"><TT>set-between-threshold</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1535.htm#methodwxmediabuffersetcaretowner"><TT>set-caret-owner</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1646.htm#methodwxmediaeditsetclickback"><TT>set-clickback</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1647.htm#methodwxmediaeditsetcursor"><TT>set-cursor</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node299.htm#methodmredconsoleeditsetdisplaydelta"><TT>set-display-delta</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node300.htm#methodmredconsoleeditsetdisplaywritehandlers"><TT>set-display/write-handlers</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1648.htm#methodwxmediaeditsetfileformat"><TT>set-file-format</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node236.htm#methodmredconnectionsmediaeditsetfilename"><TT>set-filename</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node1537.htm#methodwxmediabuffersetinactivefocusthreshold"><TT>set-inactive-focus-threshold</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1538.htm#methodwxmediabuffersetkeymap"><TT>set-keymap</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node301.htm#methodmredconsoleeditsetlastheaderposition"><TT>set-last-header-position</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1539.htm#methodwxmediabuffersetloadoverwritesstyles"><TT>set-load-overwrites-styles</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1540.htm#methodwxmediabuffersetmaxheight"><TT>set-max-height</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1541.htm#methodwxmediabuffersetmaxundohistory"><TT>set-max-undo-history</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1542.htm#methodwxmediabuffersetmaxwidth"><TT>set-max-width</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1543.htm#methodwxmediabuffersetminheight"><TT>set-min-height</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1544.htm#methodwxmediabuffersetminwidth"><TT>set-min-width</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node590.htm#methodmredmediaeditsetmode"><TT>set-mode</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node237.htm#methodmredconnectionsmediaeditsetmodified"><TT>set-modified</TT></A> from <A HREF="../toolbox/node227.htm#classmredconnectionsmediaedit"><TT>mred:connections-media-edit%</TT></A><LI> <A HREF="../toolbox/node495.htm#methodmredinfoeditsetoverwritemode"><TT>set-overwrite-mode</TT></A> from <A HREF="../toolbox/node487.htm#classmredinfoedit"><TT>mred:info-edit%</TT></A><LI> <A HREF="../toolbox/node1650.htm#methodwxmediaeditsetposition"><TT>set-position</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1651.htm#methodwxmediaeditsetpositionbiasscroll"><TT>set-position-bias-scroll</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1652.htm#methodwxmediaeditsetregiondata"><TT>set-region-data</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1546.htm#methodwxmediabuffersetsnipdata"><TT>set-snip-data</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1547.htm#methodwxmediabuffersetstylelist"><TT>set-style-list</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node591.htm#methodmredmediaeditsetstylesfixed"><TT>set-styles-fixed</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="../toolbox/node1653.htm#methodwxmediaeditsettabs"><TT>set-tabs</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1654.htm#methodwxmediaeditsetwordbreakfunc"><TT>set-wordbreak-func</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1655.htm#methodwxmediaeditsetwordbreakmap"><TT>set-wordbreak-map</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node1548.htm#methodwxmediabuffersizecacheinvalid"><TT>size-cache-invalid</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1656.htm#methodwxmediaeditsplitsnip"><TT>split-snip</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A><LI> <A HREF="../toolbox/node592.htm#methodmredmediaeditstylesfixed"><TT>styles-fixed?</TT></A> from <A HREF="../toolbox/node558.htm#classmredmediaedit"><TT>mred:media-edit%</TT></A><LI> <A HREF="node70.htm#methoddrschemerepeditsystemparameterization"><TT>system-parameterization</TT></A><LI> <A HREF="../toolbox/node302.htm#methodmredconsoleedittakeover"><TT>takeover</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node303.htm#methodmredconsoleeditthiserr"><TT>this-err</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node304.htm#methodmredconsoleeditthiserrwrite"><TT>this-err-write</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node305.htm#methodmredconsoleeditthisin"><TT>this-in</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node306.htm#methodmredconsoleeditthisout"><TT>this-out</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node307.htm#methodmredconsoleeditthisoutwrite"><TT>this-out-write</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node308.htm#methodmredconsoleeditthisresult"><TT>this-result</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node309.htm#methodmredconsoleeditthisresultwrite"><TT>this-result-write</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node310.htm#methodmredconsoleedittransparentedit"><TT>transparent-edit</TT></A> from <A HREF="../toolbox/node251.htm#classmredconsoleedit"><TT>mred:console-edit%</TT></A><LI> <A HREF="../toolbox/node1549.htm#methodwxmediabufferundo"><TT>undo</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="node71.htm#methoddrschemerepedituserparam"><TT>user-param</TT></A><LI> <A HREF="../toolbox/node1550.htm#methodwxmediabufferwritefooterstofile"><TT>write-footers-to-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1551.htm#methodwxmediabufferwriteheaderstofile"><TT>write-headers-to-file</TT></A> from <A HREF="../toolbox/node1447.htm#classwxmediabuffer"><TT>wx:media-buffer%</TT></A><LI> <A HREF="../toolbox/node1657.htm#methodwxmediaeditwritetofile"><TT>write-to-file</TT></A> from <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A>
</UL><HR><A NAME="tex2html1110" HREF="node60.htm"><IMG SRC="../icons/left.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[previous]"></A> <A NAME="tex2html1116" HREF="node60.htm"><IMG SRC="../icons/up.gif" WIDTH=30 HEIGHT=29 BORDER=0 ALIGN=BOTTOM ALT="[up]"></A> <A NAME="tex2html1118" HREF="node62.htm"><IMG SRC="../icons/right.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[next]"></A>     <A NAME="tex2html1120" HREF="node3.htm"><IMG SRC="../icons/contents.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[contents]"></A> <A NAME="tex2html1121" HREF="node110.htm"><IMG SRC="../icons/index.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[index]"></A><BR>
<B> Next:</B> <A NAME="tex2html1119" HREF="node62.htm">break</A>
<B>Up:</B> <A NAME="tex2html1117" HREF="node60.htm">Tools</A>
<B> Previous:</B> <A NAME="tex2html1111" HREF="node60.htm">Tools</A>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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</HTML>
plt-doc-53/collects/doc/drscheme/node62.htm 100644 46062 1213 3641 6556126627 15326 0 ustar <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<!--Converted with LaTeX2HTML 96.1 (Feb 5, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds -->
<HTML>
<HEAD>
<TITLE>break</TITLE>
<META NAME="description" CONTENT="break">
<META NAME="keywords" CONTENT="drs">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<LINK REL=STYLESHEET HREF="drs.css">
</HEAD>
<BODY LANG="EN" >
<A NAME="tex2html1122" HREF="node61.htm"><IMG SRC="../icons/left.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[previous]"></A> <A NAME="tex2html1128" HREF="node61.htm"><IMG SRC="../icons/up.gif" WIDTH=30 HEIGHT=29 BORDER=0 ALIGN=BOTTOM ALT="[up]"></A> <A NAME="tex2html1130" HREF="node63.htm"><IMG SRC="../icons/right.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[next]"></A>     <A NAME="tex2html1132" HREF="node3.htm"><IMG SRC="../icons/contents.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[contents]"></A> <A NAME="tex2html1133" HREF="node110.htm"><IMG SRC="../icons/index.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[index]"></A><BR>
<B> Next:</B> <A NAME="tex2html1131" HREF="node63.htm">display-result</A>
<B>Up:</B> <A NAME="tex2html1129" HREF="node61.htm">drscheme:rep:edit</A>
<B> Previous:</B> <A NAME="tex2html1123" HREF="node61.htm">drscheme:rep:edit</A>
<BR> <P>
<H2><A NAME="SECTION00811000000000000000"><TT>break</TT></A></H2>
<A NAME=19282></A> <A NAME="methoddrschemerepeditbreak"></A>
<P>
This method is called when the user clicks on the break button.
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> break)</TT> <TT>-></TT> <I>void</I>
<P>
This method breaks the evaluation thread.
<P>
It then inserts a new prompt, using
<A HREF="../toolbox/node278.htm#methodmredconsoleeditinsertprompt"><TT>insert-prompt</TT></A>
<P>
<BR>
</UL><BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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</HTML>
plt-doc-53/collects/doc/drscheme/node63.htm 100644 46062 1213 3516 6556126627 15330 0 ustar <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<!--Converted with LaTeX2HTML 96.1 (Feb 5, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds -->
<HTML>
<HEAD>
<TITLE>display-result</TITLE>
<META NAME="description" CONTENT="display-result">
<META NAME="keywords" CONTENT="drs">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<LINK REL=STYLESHEET HREF="drs.css">
</HEAD>
<BODY LANG="EN" >
<A NAME="tex2html1134" HREF="node62.htm"><IMG SRC="../icons/left.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[previous]"></A> <A NAME="tex2html1140" HREF="node61.htm"><IMG SRC="../icons/up.gif" WIDTH=30 HEIGHT=29 BORDER=0 ALIGN=BOTTOM ALT="[up]"></A> <A NAME="tex2html1142" HREF="node64.htm"><IMG SRC="../icons/right.gif" WIDTH=29 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[next]"></A>     <A NAME="tex2html1144" HREF="node3.htm"><IMG SRC="../icons/contents.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[contents]"></A> <A NAME="tex2html1145" HREF="node110.htm"><IMG SRC="../icons/index.gif" WIDTH=80 HEIGHT=30 BORDER=0 ALIGN=BOTTOM ALT="[index]"></A><BR>
<B> Next:</B> <A NAME="tex2html1143" HREF="node64.htm">do-eval</A>
<B>Up:</B> <A NAME="tex2html1141" HREF="node61.htm">drscheme:rep:edit</A>
<B> Previous:</B> <A NAME="tex2html1135" HREF="node62.htm">break</A>
<BR> <P>
<H2><A NAME="SECTION00812000000000000000"><TT>display-result</TT></A></H2>
<A NAME=19287></A> <A NAME="methoddrschemerepeditdisplayresult"></A>
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> display-result <EM>v</EM>)</TT> <TT>-></TT> <I>void</I>
<BR>     <EM>v</EM> : <I>any scheme value</I>
<P>
This displays the result of a computation in the bottom window.
<P>
<BR>
</UL><BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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</HTML>
plt-doc-53/collects/doc/drscheme/node64.htm 100644 46062 1213 3537 6556126627 15334 0 ustar <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<!--Converted with LaTeX2HTML 96.1 (Feb 5, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds -->
<HTML>
<HEAD>
<TITLE>do-eval</TITLE>
<META NAME="description" CONTENT="do-eval">
<META NAME="keywords" CONTENT="drs">
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<META NAME="distribution" CONTENT="global">
<LINK REL=STYLESHEET HREF="drs.css">
</HEAD>
<BODY LANG="EN" >
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<BR> <P>
<H2><A NAME="SECTION00813000000000000000"><TT>do-eval</TT></A></H2>
<A NAME=19291></A> <A NAME="methoddrschemerepeditdoeval"></A>
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> do-eval <EM>start</EM> <EM>end</EM>)</TT> <TT>-></TT> <I>void</I>
<BR>     <EM>start</EM> : <I>integer</I>
<BR>     <EM>end</EM> : <I>integer </I>
<P>
Calls do-many-buffer-evals
<P>
<BR>
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<BR> <P>
<H2><A NAME="SECTION00814000000000000000"><TT>do-many-buffer-evals</TT></A></H2>
<A NAME=19295></A> <A NAME="methoddrschemerepeditdomanybufferevals"></A>
<P>
This function should evaluate all of the expressions in a buffer.
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> do-many-buffer-evals <EM>edit</EM> <EM>start</EM> <EM>end</EM> <EM>pre</EM> <EM>post</EM>)</TT> <TT>-></TT> <I>void</I>
<BR>     <EM>edit</EM> : <I>a <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A> object</I>
<BR>     <EM>start</EM> : <I>int</I>
<BR>     <EM>end</EM> : <I>int </I>
<BR>     <EM>pre</EM> : <I>a function of no arguments</I>
<BR>     <EM>post</EM> : <I>a function of no arguments</I>
<P>
It evaluates all of the expressions in <EM>edit</EM> starting at
<EM>start</EM> and ending at <EM>end</EM>.
<P>
<BR>
</UL><BR> <HR>
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<H2><A NAME="SECTION00815000000000000000"><TT>initialize-console</TT></A></H2>
<A NAME=19300></A> <A NAME="methoddrschemerepeditinitializeconsole"></A>
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> initialize-console)</TT> <TT>-></TT> <I>void</I>
<P>
This inserts the ``Welcome to DrScheme'' message into the interactions
buffer.
<P>
<BR>
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<BR> <P>
<H2><A NAME="SECTION00816000000000000000"><TT>report-error</TT></A></H2>
<A NAME=19304></A> <A NAME="methoddrschemerepeditreporterror"></A>
<P>
This is called to report an error in the user's program.
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> report-error <EM>start-location</EM> <EM>end-location</EM> <EM>type</EM> <EM>error-message</EM>)</TT> <TT>-></TT> <I>void</I>
<BR>     <EM>start-location</EM> : <I>a <TT>zodiac:zodiac</TT> struct</I>
<BR>     <EM>end-location</EM> : <I>a <TT>zodiac:zodiac</TT> struct</I>
<BR>     <EM>type</EM> : <I>symbol</I>
<BR>     <EM>error-message</EM> : <I>string</I>
<P>
See <A NAME="tex2html113" HREF="../m3/index.htm"><I>PLT McMicMac: Parser Manual</I></A> for the definition of the <TT>zodiac:zodiac</TT> struct.
<P>
The default behavior is to higlight the range from the start-location
to end-location in the edit named in the <TT>file</TT> field of
<EM>start-location</EM>, if the <TT>file</TT> field is a
<A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A> instance.
<P>
If the file field is not an instance of <A HREF="../toolbox/node1573.htm#classwxmediaedit"><TT>wx:media-edit%</TT></A>, it will
pop up a modal dialog with the error message and the source location.
<P>
<BR>
</UL><BR> <HR>
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<H2><A NAME="SECTION00817000000000000000"><TT>reset-console</TT></A></H2>
<A NAME=19313></A> <A NAME="methoddrschemerepeditresetconsole"></A>
<P>
This method graphically resets the console after its state has been cleared.
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> reset-console)</TT> <TT>-></TT> <I>void</I>
<P>
Kills the old eventspace, and creates a new
parameterization
<P>
Also calls the super method.
<P>
To change/extend the user's parameterization, ovveride this method,
and after the call to the super method returns, change the
parameterization. For example, to add a definition of a function,
<TT>f</TT>, to the users' namespace, write this:
<P>
<PRE> (class ...
(inherit user-param)
(rename [super-reset-console reset-console])
(public
[reset-console
(lambda ()
(super-reset-console)
(parameterize ([current-namespace ((in-parameterization user-param current-namespace))])
(lambda ()
(global-defined-value 'f (lambda (...) ...)))))]))</PRE>
<P>
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<H2><A NAME="SECTION00818000000000000000"><TT>run-in-evaluation-thread</TT></A></H2>
<A NAME=19317></A> <A NAME="methoddrschemerepeditruninevaluationthread"></A>
<P>
This function runs it's arguments in the user evaluation thread. This
thread is the same as the user's eventspace main thread.
<P>
<UL><LI> <TT>(send <EM>a-drscheme:rep:edit</EM> run-in-evaluation-thread <EM>f</EM>)</TT> <TT>-></TT> <I>void</I>
<BR>     <EM>f</EM> : <I>( -> void)</I>
<P>
Calls <EM>f</EM>, after switching to the user's thread.
<P>
<BR>
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<H2><A NAME="SECTION00819000000000000000"><TT>system-parameterization</TT></A></H2>
<A NAME=19321></A> <A NAME="methoddrschemerepeditsystemparameterization"></A>
<P>
This parameterization is the parameterization that the implementation
of DrScheme runs in. See also
<A HREF="node71.htm#methoddrschemerepedituserparam"><TT>user-param</TT></A>.
<P>
See <A HREF="../mzscheme/node99.htm#mzparameters">parameters</A>
for more information about parameters.
<P>
<UL><LI> <TT>(ivar <EM>a-drscheme:rep:edit</EM> system-parameterization)</TT> <TT>-></TT> <I>a parameterization</I>
</UL><BR> <HR>
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<H2><A NAME="SECTION008110000000000000000"><TT>user-param</TT></A></H2>
<A NAME=19326></A> <A NAME="methoddrschemerepedituserparam"></A>
<P>
This is the parameterization that the users code runs in. It is
updated with <TT>set!</TT> each time the user clicks on the execute
button, but the
<A HREF="node68.htm#methoddrschemerepeditresetconsole"><TT>reset-console</TT></A> method.
<P>
It is <TT>#f</TT> before the first time the user click on the Execute
button.
<P>
See <A HREF="../mzscheme/node99.htm#mzparameters">parameters</A>
for more information about parameters.
<P>
<UL><LI> <TT>(ivar <EM>a-drscheme:rep:edit</EM> user-param)</TT> <TT>-></TT> <I>a parameterization or <TT>#f</TT></I>
</UL><BR> <HR>
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<H1><A NAME="SECTION00820000000000000000"><TT>drscheme:unit:definitions-canvas%</TT></A></H1>
<A NAME=19332></A> <A NAME="classdrschemeunitdefinitionscanvas"></A> Superclass: <A HREF="../toolbox/node389.htm#classmredframetitlecanvas"><TT>mred:frame-title-canvas%</TT></A><A NAME=19334></A>
<P>
Methods:
<UL><LI> <A HREF="node73.htm#methoddrschemeunitdefinitionscanvaseditmodified"><TT>edit-modified</TT></A><LI> <A HREF="node74.htm#methoddrschemeunitdefinitionscanvaseditrenamed"><TT>edit-renamed</TT></A>
</UL>
All methods:
<UL><LI> <A HREF="../toolbox/node1150.htm#methodwxcanvasallowdoubleclick"><TT>allow-double-click</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1554.htm#methodwxmediacanvasallowscrolltolast"><TT>allow-scroll-to-last</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1151.htm#methodwxcanvasbegindrawing"><TT>begin-drawing</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1555.htm#methodwxmediacanvascallasprimaryowner"><TT>call-as-primary-owner</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node2097.htm#methodwxwindowcenter"><TT>center</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2098.htm#methodwxwindowcentre"><TT>centre</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1152.htm#methodwxcanvasclear"><TT>clear</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node2099.htm#methodwxwindowclienttoscreen"><TT>client-to-screen</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node538.htm#methodmredmediacanvasdefaultx"><TT>default-x</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node539.htm#methodmredmediacanvasdefaultxstretch"><TT>default-x-stretch</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node540.htm#methodmredmediacanvasdefaulty"><TT>default-y</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node541.htm#methodmredmediacanvasdefaultystretch"><TT>default-y-stretch</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1153.htm#methodwxcanvasdestroyclippingregion"><TT>destroy-clipping-region</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1154.htm#methodwxcanvasdrawarc"><TT>draw-arc</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1155.htm#methodwxcanvasdrawellipse"><TT>draw-ellipse</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1156.htm#methodwxcanvasdrawline"><TT>draw-line</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1157.htm#methodwxcanvasdrawlines"><TT>draw-lines</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1158.htm#methodwxcanvasdrawpoint"><TT>draw-point</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1159.htm#methodwxcanvasdrawpolygon"><TT>draw-polygon</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1160.htm#methodwxcanvasdrawrectangle"><TT>draw-rectangle</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1161.htm#methodwxcanvasdrawroundedrectangle"><TT>draw-rounded-rectangle</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1162.htm#methodwxcanvasdrawspline"><TT>draw-spline</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1163.htm#methodwxcanvasdrawtext"><TT>draw-text</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="node73.htm#methoddrschemeunitdefinitionscanvaseditmodified"><TT>edit-modified</TT></A><LI> <A HREF="node74.htm#methoddrschemeunitdefinitionscanvaseditrenamed"><TT>edit-renamed</TT></A><LI> <A HREF="../toolbox/node542.htm#methodmredmediacanvasenable"><TT>enable</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1164.htm#methodwxcanvasenddrawing"><TT>end-drawing</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1556.htm#methodwxmediacanvasforcedisplayfocus"><TT>force-display-focus</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node543.htm#methodmredmediacanvasforceredraw"><TT>force-redraw</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node223.htm#methodmredconnectionsmediacanvasframe"><TT>frame</TT></A> from <A HREF="../toolbox/node220.htm#classmredconnectionsmediacanvas"><TT>mred:connections-media-canvas%</TT></A><LI> <A HREF="../toolbox/node2101.htm#methodwxwindowgetcharheight"><TT>get-char-height</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2102.htm#methodwxwindowgetcharwidth"><TT>get-char-width</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2103.htm#methodwxwindowgetclientsize"><TT>get-client-size</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1165.htm#methodwxcanvasgetclippingregion"><TT>get-clipping-region</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1166.htm#methodwxcanvasgetdc"><TT>get-dc</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1096.htm#methodmredwrappingcanvasgeteditPRECENT"><TT>get-edit%</TT></A> from <A HREF="../toolbox/node1095.htm#classmredwrappingcanvas"><TT>mred:wrapping-canvas%</TT></A><LI> <A HREF="../toolbox/node2104.htm#methodwxwindowgetgrandparent"><TT>get-grand-parent</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2105.htm#methodwxwindowgetheight"><TT>get-height</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node544.htm#methodmredmediacanvasgetinfo"><TT>get-info</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node2106.htm#methodwxwindowgetlabel"><TT>get-label</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1557.htm#methodwxmediacanvasgetlazyrefresh"><TT>get-lazy-refresh</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1558.htm#methodwxmediacanvasgetmedia"><TT>get-media</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node545.htm#methodmredmediacanvasgetminsize"><TT>get-min-size</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node2107.htm#methodwxwindowgetname"><TT>get-name</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2108.htm#methodwxwindowgetparent"><TT>get-parent</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2109.htm#methodwxwindowgetposition"><TT>get-position</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1167.htm#methodwxcanvasgetscrollpage"><TT>get-scroll-page</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1168.htm#methodwxcanvasgetscrollpos"><TT>get-scroll-pos</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1169.htm#methodwxcanvasgetscrollrange"><TT>get-scroll-range</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node2110.htm#methodwxwindowgetsize"><TT>get-size</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1097.htm#methodmredwrappingcanvasgetstyleflags"><TT>get-style-flags</TT></A> from <A HREF="../toolbox/node1095.htm#classmredwrappingcanvas"><TT>mred:wrapping-canvas%</TT></A><LI> <A HREF="../toolbox/node2111.htm#methodwxwindowgettextextent"><TT>get-text-extent</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1170.htm#methodwxcanvasgetvirtualsize"><TT>get-virtual-size</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node2112.htm#methodwxwindowgetwidth"><TT>get-width</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2113.htm#methodwxwindowgetx"><TT>get-x</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2114.htm#methodwxwindowgety"><TT>get-y</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node546.htm#methodmredmediacanvasisenabled"><TT>is-enabled?</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1559.htm#methodwxmediacanvasisfocuson"><TT>is-focus-on?</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node2115.htm#methodwxwindowisshown"><TT>is-shown?</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1098.htm#methodmredwrappingcanvasmakeedit"><TT>make-edit</TT></A> from <A HREF="../toolbox/node1095.htm#classmredwrappingcanvas"><TT>mred:wrapping-canvas%</TT></A><LI> <A HREF="../toolbox/node1099.htm#methodmredwrappingcanvasmakeinitialedit"><TT>make-initial-edit</TT></A> from <A HREF="../toolbox/node1095.htm#classmredwrappingcanvas"><TT>mred:wrapping-canvas%</TT></A><LI> <A HREF="../toolbox/node2116.htm#methodwxwindowmove"><TT>move</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1560.htm#methodwxmediacanvasonchar"><TT>on-char</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node547.htm#methodmredmediacanvasoncontainerresize"><TT>on-container-resize</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node548.htm#methodmredmediacanvasondefaultaction"><TT>on-default-action</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1561.htm#methodwxmediacanvasonevent"><TT>on-event</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1562.htm#methodwxmediacanvasonfocus"><TT>on-focus</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node510.htm#methodmredkeymapcanvasonkillfocus"><TT>on-kill-focus</TT></A> from <A HREF="../toolbox/node509.htm#classmredkeymapcanvas"><TT>mred:keymap-canvas%</TT></A><LI> <A HREF="../toolbox/node1564.htm#methodwxmediacanvasonpaint"><TT>on-paint</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1565.htm#methodwxmediacanvasonscroll"><TT>on-scroll</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node511.htm#methodmredkeymapcanvasonsetfocus"><TT>on-set-focus</TT></A> from <A HREF="../toolbox/node509.htm#classmredkeymapcanvas"><TT>mred:keymap-canvas%</TT></A><LI> <A HREF="../toolbox/node1567.htm#methodwxmediacanvasonsize"><TT>on-size</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1175.htm#methodwxcanvaspopupmenu"><TT>popup-menu</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node2120.htm#methodwxwindowpreonchar"><TT>pre-on-char</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2121.htm#methodwxwindowpreonevent"><TT>pre-on-event</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2122.htm#methodwxwindowrefresh"><TT>refresh</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1100.htm#methodmredwrappingcanvasresizeedit"><TT>resize-edit</TT></A> from <A HREF="../toolbox/node1095.htm#classmredwrappingcanvas"><TT>mred:wrapping-canvas%</TT></A><LI> <A HREF="../toolbox/node2123.htm#methodwxwindowscreentoclient"><TT>screen-to-client</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1568.htm#methodwxmediacanvasscroll"><TT>scroll</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1569.htm#methodwxmediacanvasscrollwithbottombase"><TT>scroll-with-bottom-base</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1177.htm#methodwxcanvassetbackground"><TT>set-background</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1178.htm#methodwxcanvassetbrush"><TT>set-brush</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1179.htm#methodwxcanvassetclippingregion"><TT>set-clipping-region</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node2124.htm#methodwxwindowsetcursor"><TT>set-cursor</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2125.htm#methodwxwindowsetfocus"><TT>set-focus</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1180.htm#methodwxcanvassetfont"><TT>set-font</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1570.htm#methodwxmediacanvassetlazyrefresh"><TT>set-lazy-refresh</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1181.htm#methodwxcanvassetlogicalfunction"><TT>set-logical-function</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node512.htm#methodmredkeymapcanvassetmedia"><TT>set-media</TT></A> from <A HREF="../toolbox/node509.htm#classmredkeymapcanvas"><TT>mred:keymap-canvas%</TT></A><LI> <A HREF="../toolbox/node1182.htm#methodwxcanvassetpen"><TT>set-pen</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1183.htm#methodwxcanvassetscrollpage"><TT>set-scroll-page</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1184.htm#methodwxcanvassetscrollpos"><TT>set-scroll-pos</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1185.htm#methodwxcanvassetscrollrange"><TT>set-scroll-range</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1572.htm#methodwxmediacanvassetscrollbars"><TT>set-scrollbars</TT></A> from <A HREF="../toolbox/node1553.htm#classwxmediacanvas"><TT>wx:media-canvas%</TT></A><LI> <A HREF="../toolbox/node549.htm#methodmredmediacanvassetsize"><TT>set-size</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1187.htm#methodwxcanvassettextbackground"><TT>set-text-background</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1188.htm#methodwxcanvassettextforeground"><TT>set-text-foreground</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node2127.htm#methodwxwindowshow"><TT>show</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node550.htm#methodmredmediacanvasstretchableinx"><TT>stretchable-in-x</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node551.htm#methodmredmediacanvasstretchableiny"><TT>stretchable-in-y</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1101.htm#methodmredwrappingcanvasstyleflags"><TT>style-flags</TT></A> from <A HREF="../toolbox/node1095.htm#classmredwrappingcanvas"><TT>mred:wrapping-canvas%</TT></A><LI> <A HREF="../toolbox/node552.htm#methodmredmediacanvasuserminclientheight"><TT>user-min-client-height</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node553.htm#methodmredmediacanvasuserminclientwidth"><TT>user-min-client-width</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node554.htm#methodmredmediacanvasuserminheight"><TT>user-min-height</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node555.htm#methodmredmediacanvasuserminwidth"><TT>user-min-width</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node1189.htm#methodwxcanvasviewstart"><TT>view-start</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node1190.htm#methodwxcanvaswarppointer"><TT>warp-pointer</TT></A> from <A HREF="../toolbox/node1149.htm#classwxcanvas"><TT>wx:canvas%</TT></A><LI> <A HREF="../toolbox/node556.htm#methodmredmediacanvasxmarginwidth"><TT>x-margin-width</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A><LI> <A HREF="../toolbox/node557.htm#methodmredmediacanvasymarginheight"><TT>y-margin-height</TT></A> from <A HREF="../toolbox/node537.htm#classmredmediacanvas"><TT>mred:media-canvas%</TT></A>
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<H2><A NAME="SECTION00821000000000000000"><TT>edit-modified</TT></A></H2>
<A NAME=19554></A> <A NAME="methoddrschemeunitdefinitionscanvaseditmodified"></A>
<P>
This method is called by
the canvas's buffer to notify the canvas that the modification state
of the buffer has changed.
<P>
<UL><LI> <TT>(send <EM>a-drscheme:unit:definitions-canvas</EM> edit-modified <EM>modified?</EM>)</TT> <TT>-></TT> <I>void</I>
<BR>     <EM>modified?</EM> : <I>boolean</I>
<P>
This method shows and hides the save button on the drscheme frame.
<P>
<BR>
</UL><BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
</ADDRESS>
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<H2><A NAME="SECTION00822000000000000000"><TT>edit-renamed</TT></A></H2>
<A NAME=19558></A> <A NAME="methoddrschemeunitdefinitionscanvaseditrenamed"></A>
<P>
This method is called by
the canvas's buffer to notify the canvas that the buffer's filename
has changed.
<P>
<UL><LI> <TT>(send <EM>a-drscheme:unit:definitions-canvas</EM> edit-renamed <EM>name</EM>)</TT> <TT>-></TT> <I>void</I>
<BR>     <EM>name</EM> : <I>string</I>
<P>
This method updates the name of the file on the drscheme frame.
<P>
<BR>
</UL><BR> <HR>
<P><ADDRESS>
<A TARGET="_top" HREF="http://www.cs.rice.edu/CS/PLT/">PLT</A>
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<H1><A NAME="SECTION00830000000000000000"><TT>drscheme:unit:frame%</TT></A></H1>
<A NAME=19562></A> <A NAME="classdrschemeunitframe"></A> Superclass: <A HREF="../toolbox/node498.htm#classmredinfoframe"><TT>mred:info-frame%</TT></A><A NAME=19564></A>
<P>
<UL><LI> <TT>(make-object drscheme:unit:frame% <EM>name</EM>)</TT> <TT>-></TT> <I><A HREF="node75.htm#classdrschemeunitframe"><TT>drscheme:unit:frame%</TT></A> object</I>
<BR>     <EM>name = <TT><A NAME=19568></A><TT>mred:frame-name</TT></TT></EM> : <I>string</I>
<P>
This frame maintains some status information at the bottom of the
frame, about the state of the edit returned by the method
<A HREF="../toolbox/node501.htm#methodmredinfoframegetinfoedit"><TT>get-info-edit</TT></A>.
<P>
It displays a pad-lock icon when the edit is locked, and an unlocked
pad-lock when it is unlocked, see
<A HREF="../toolbox/node1501.htm#methodwxmediabufferlock"><TT>lock</TT></A>.
It displays ``Overwrite'' when the edit is in overwrite mode, see
<A HREF="../toolbox/node1649.htm#methodwxmediaeditsetoverwritemode"><TT>set-overwrite-mode</TT></A> and an icon of an anchor when the buffer
<A HREF="../toolbox/node1598.htm#methodwxmediaeditgetanchor"><TT>get-anchor</TT></A> returns true.
<P>
<BR><LI> <TT>(make-object drscheme:unit:frame%)</TT> <TT>-></TT> <I><A HREF="node75.htm#classdrschemeunitframe"><TT>drscheme:unit:frame%</TT></A> object</I>
<P>
<BR>
</UL>
Methods:
<UL><LI> <A HREF="node76.htm#methoddrschemeunitframebuttonpanel"><TT>button-panel</TT></A><LI> <A HREF="node77.htm#methoddrschemeunitframedefinitionscanvas"><TT>definitions-canvas</TT></A><LI> <A HREF="node78.htm#methoddrschemeunitframedefinitionsedit"><TT>definitions-edit</TT></A><LI> <A HREF="node79.htm#methoddrschemeunitframedisableevaluation"><TT>disable-evaluation</TT></A><LI> <A HREF="node80.htm#methoddrschemeunitframeenableevaluation"><TT>enable-evaluation</TT></A><LI> <A HREF="node81.htm#methoddrschemeunitframeensureinteractionsshown"><TT>ensure-interactions-shown</TT></A><LI> <A HREF="node82.htm#methoddrschemeunitframeexecutecallback"><TT>execute-callback</TT></A><LI> <A HREF="node83.htm#methoddrschemeunitframegetedittosearch"><TT>get-edit-to-search</TT></A><LI> <A HREF="node84.htm#methoddrschemeunitframeinteractionscanvas"><TT>interactions-canvas</TT></A><LI> <A HREF="node85.htm#methoddrschemeunitframeinteractionsedit"><TT>interactions-edit</TT></A><LI> <A HREF="node86.htm#methoddrschemeunitframemakemenubar"><TT>make-menu-bar</TT></A><LI> <A HREF="node87.htm#methoddrschemeunitframemakesearchable"><TT>make-searchable</TT></A><LI> <A HREF="node88.htm#methoddrschemeunitframeupdateshown"><TT>update-shown</TT></A>
</UL>
All methods:
<UL><LI> <A HREF="../toolbox/node830.htm#methodmredsimplemenuframeBOTTOMMARGIN"><TT>BOTTOM-MARGIN</TT></A> from <A HREF="../toolbox/node829.htm#classmredsimplemenuframe"><TT>mred:simple-menu-frame%</TT></A><LI> <A HREF="../toolbox/node831.htm#methodmredsimplemenuframeHEIGHT"><TT>HEIGHT</TT></A> from <A HREF="../toolbox/node829.htm#classmredsimplemenuframe"><TT>mred:simple-menu-frame%</TT></A><LI> <A HREF="../toolbox/node832.htm#methodmredsimplemenuframeLEFTMARGIN"><TT>LEFT-MARGIN</TT></A> from <A HREF="../toolbox/node829.htm#classmredsimplemenuframe"><TT>mred:simple-menu-frame%</TT></A><LI> <A HREF="../toolbox/node833.htm#methodmredsimplemenuframeMARGIN"><TT>MARGIN</TT></A> from <A HREF="../toolbox/node829.htm#classmredsimplemenuframe"><TT>mred:simple-menu-frame%</TT></A><LI> <A HREF="../toolbox/node834.htm#methodmredsimplemenuframeRIGHTMARGIN"><TT>RIGHT-MARGIN</TT></A> from <A HREF="../toolbox/node829.htm#classmredsimplemenuframe"><TT>mred:simple-menu-frame%</TT></A><LI> <A HREF="../toolbox/node835.htm#methodmredsimplemenuframeTOPMARGIN"><TT>TOP-MARGIN</TT></A> from <A HREF="../toolbox/node829.htm#classmredsimplemenuframe"><TT>mred:simple-menu-frame%</TT></A><LI> <A HREF="../toolbox/node836.htm#methodmredsimplemenuframeWIDTH"><TT>WIDTH</TT></A> from <A HREF="../toolbox/node829.htm#classmredsimplemenuframe"><TT>mred:simple-menu-frame%</TT></A><LI> <A HREF="../toolbox/node215.htm#methodmredconnectionsframeactivecanvas"><TT>active-canvas</TT></A> from <A HREF="../toolbox/node214.htm#classmredconnectionsframe"><TT>mred:connections-frame%</TT></A><LI> <A HREF="../toolbox/node216.htm#methodmredconnectionsframeactiveedit"><TT>active-edit</TT></A> from <A HREF="../toolbox/node214.htm#classmredconnectionsframe"><TT>mred:connections-frame%</TT></A><LI> <A HREF="../toolbox/node499.htm#methodmredinfoframeanchorstatuschanged"><TT>anchor-status-changed</TT></A> from <A HREF="../toolbox/node498.htm#classmredinfoframe"><TT>mred:info-frame%</TT></A><LI> <A HREF="node76.htm#methoddrschemeunitframebuttonpanel"><TT>button-panel</TT></A><LI> <A HREF="../toolbox/node339.htm#methodmredemptyframecanclose"><TT>can-close?</TT></A> from <A HREF="../toolbox/node338.htm#classmredemptyframe"><TT>mred:empty-frame%</TT></A><LI> <A HREF="../toolbox/node2097.htm#methodwxwindowcenter"><TT>center</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node2098.htm#methodwxwindowcentre"><TT>centre</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node363.htm#methodmredframechildredrawrequest"><TT>child-redraw-request</TT></A> from <A HREF="../toolbox/node362.htm#classmredframe"><TT>mred:frame%</TT></A><LI> <A HREF="../toolbox/node2099.htm#methodwxwindowclienttoscreen"><TT>client-to-screen</TT></A> from <A HREF="../toolbox/node2096.htm#classwxwindow"><TT>wx:window%</TT></A><LI> <A HREF="../toolbox/node1336.htm#methodwxframecommand"><TT>command</TT></A> from <A HREF="../toolbox/node1335.htm#classwxframe"><TT>wx:frame%</TT></A><LI> <A HREF="../toolbox/node364.htm#methodmredframecorrectsize"><TT>correct-size</TT></A> from <A HREF="../toolbox/node362.htm#classmredframe"><TT>mred:frame%</TT></A><LI> <A HREF="../toolbox/node1337.htm#methodwxframecreatestatusline"><TT>create-status-line</TT></A> from <A HREF="../toolbox/node1335.htm#classwxframe"><TT>wx:frame%</TT></A><LI> <A HREF="node77.htm#methoddrschemeunitframedefinitionscanvas"><TT>definitions-canvas</TT></A><LI> <A HREF="node78.htm#methoddrschemeunitframedefinitionsedit"><TT>definitions-edit</TT></A><LI> <A HREF="../toolbox/node365.htm#methodmredframedelayupdates"><TT>delay-updates</TT></A> from <A HREF="../toolbox/node362.htm#classmredframe"><TT>mred:frame%</TT></A><LI> <A HREF="node79.htm#methoddrschemeunitframedisableevaluation"><TT>disable-evaluation</TT></A><LI> <A HREF="../toolbox/node817.htm#methodmredsearchableframedoclose"><TT>do-close</TT></A> from <A HREF="../toolbox/node816.htm#classmredsearchableframe"><TT>mred:searchable-frame%</TT></A><LI> <A HREF="../toolbox/node896.htm#methodmredstandardmenusframeeditmenu"><TT>edit-menu</TT></A> from <A HREF="../toolbox/node895.htm#classmredstandardmenusframe"><TT>mred:standard-menus-frame%</TT></A><LI> <A HREF="../toolbox/node897.htm#methodmredstandardmenusframeeditmenuafterstandarditems"><TT>edit-menu:after-standard-items</TT></A> from <A HREF="../toolbox/node895.htm#classmredstandardmenusframe"><TT>mred:standard-menus-frame%</TT></A><LI> <A HREF="../toolbox/node898.htm#methodmredstandardmenusframeeditmenubetweenclearandselectall"><TT>edit-menu:between-clear-and-select-all</TT></A> from <A HREF="../toolbox/node895.htm#classmredstandardmenusframe"><TT>mred:standard-menus-frame%</TT></A><LI> <A HREF="../t 