74 lines
2.5 KiB
HTML
74 lines
2.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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<HTML>
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<HEAD>
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<TITLE>Galapago - GUI</TITLE>
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<META NAME="Author" CONTENT="">
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<META NAME="GENERATOR" CONTENT="Mozilla/3.01Gold (Win95; I) [Netscape]">
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</HEAD>
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<BODY background=stone.jpg>
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<CENTER>
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<A href="extensions.html"><IMG border=0 src=prev.gif ALT=" [PREV] "></A>
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<A href="implementation.html"><IMG border=0 src=next.gif ALT=" [PREV] "></A>
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<A href="index.html#toc"><IMG border=0 src=toc.gif ALT=" [PREV] "></A>
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</CENTER>
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<HR width=80% align=right color=blue>
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<P>
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<H1 ALIGN=CENTER><A NAME="top"></A>THE INTERACTIVE GUI</H1>
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<HR>
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<P>In order to make Galapagos more fun to learn with, an interactive GUI
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(Graphical User Interface) is provided. Users can make changes on the board
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while a computation is in progress and effect its execution. Drawing tools
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enable the user to draw on the board while a program is being executed.
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If a line is drawn in front of a turtle which has a relevant interrupt,
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the interrupt will be invoked if needed.<BR>
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</P>
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<P>The user has a special <I>user pen</I> that can draw line, rectangles
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or free hand. These modes are available from the toolbar. The User's pen
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width and color can be modified using the User Pen menu or the toolbar.<BR>
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</P>
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<P>Color buttons are provided on the toolbar to give a known RGB color
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to the user pen. It is useful when the user draw an object on the board
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and wants a turtle to see this object. The colors are: </P>
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<P>White - (255 255 255) </P>
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<P>Black - (0 0 0) </P>
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<P><FONT COLOR="#0000FF">Blue</FONT> - (0 0 255) </P>
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<P><FONT COLOR="#FF0000">Red</FONT> - (255 0 0) </P>
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<P><FONT COLOR="#00FF00">Green</FONT> - (0 255 0) </P>
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<P><FONT COLOR="#FFFF00">Yellow</FONT> - (255 255 0)<BR>
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</P>
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<P>Another option available is changing a turtle's heading and position,
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using the Move Turtle button: </P>
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<CENTER><P><IMG border=0 SRC="img00010.gif" HEIGHT=33 WIDTH=37><BR>
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</P></CENTER>
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<P>If this button is pressed then a turtle can be dragged to a new location
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simply by dragging it with the mouse. In order to change the turtle's heading,
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hold down a control key and move the move towards the desired location,
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the turtle will follow the movement of the mouse. </P>
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<P>
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<HR width=80% align=left color=blue>
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<CENTER>
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<A href="#top"><IMG border=0 src=back.gif ALT=" [TOP] "></A>
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<A href="extensions.html"><IMG border=0 src=prev.gif ALT=" [PREV] "></A>
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<A href="implementation.html"><IMG border=0 src=next.gif ALT=" [PREV] "></A>
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<A href="index.html#toc"><IMG border=0 src=toc.gif ALT=" [PREV] "></A>
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</CENTER>
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</BODY>
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</HTML>
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