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fixed world docs

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svn: r4737
This commit is contained in:
Matthias Felleisen 2006-11-01 21:15:02 +00:00
parent 808ef37fef
commit 22a24b1a04
1 changed files with 6 additions and 4 deletions
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10
collects/teachpack/htdp/Docs/world.thtml
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@ -54,10 +54,12 @@ students to simulate a small world of animated drawings and games:
its button(s).
</pre>
<li><code>{(idx on-redraw)} : (World -> Image) -> true</code><br>
<code>(on-tick-event world->image)</code> means that DrScheme
calls <code>world->image</code> whenever the canvas must be redrawn; the
result is displayed in the teachpack's canvas
<li><code>{(idx on-redraw)} : (World -> Scene) -> true</code><br>
<code>(on-redraw world->scene)</code> means that DrScheme calls
<code>world->image</code> whenever the canvas must be redrawn (usually
after a tick event/a keyboard event/a mouse event has occurred);
the function consumes the current world and produces a scene, which is
then displayed in the teachpack's canvas
<li><code>{(idx end-of-time)} : String u Symbol -> World</code><br> When DrScheme
evaluates <code>(end-of-time)</code>, it stops the clock and displays the