46 lines
1.8 KiB
HTML
46 lines
1.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
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<TITLE>X11-big-cursor MINIHOWTO: Technical discussion</TITLE>
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<LINK HREF="X-Big-Cursor-6.html" REL=next>
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<LINK HREF="X-Big-Cursor-4.html" REL=previous>
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<LINK HREF="X-Big-Cursor.html#toc5" REL=contents>
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</HEAD>
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<BODY>
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<A HREF="X-Big-Cursor-6.html">Next</A>
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<A HREF="X-Big-Cursor-4.html">Previous</A>
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<A HREF="X-Big-Cursor.html#toc5">Contents</A>
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<HR>
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<H2><A NAME="tech"></A> <A NAME="s5">5. Technical discussion</A></H2>
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<P>Is it possible to write a X program that enlarges cursors
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automatically?
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<P>
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<DL>
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<DT><B>(Partial) solution 1</B><DD><P>Use the XTestCompareCursor from the XTEST
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extension. For all windows that the mouse pointer enters compare the
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cursor of this window with a set of `known' cursors (e. g. from
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the cursor font). If the cursor is found, replace it with an enlarged
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version, otherwise either leave it alone or substitute a standard
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cursor. This will only work where the XTest extension is available.
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<P>
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<DT><B>Solution 2</B><DD><P>Write a proxy X server that relays all client requests
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unchanged to the real X server, except that it intercepts all requests
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corresponing to the <CODE>XCreate*Cursor</CODE> Xlib
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functions. <CODE>XCreate*Cursor</CODE> requests should be modified to use
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an enlarged cursor.
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<P>This proxy server simulates a new display, e. g. <CODE>:1</CODE>. All
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clients that connect to this display (e. g. <CODE>xterm -display
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:1</CODE>) are displayed on the real server (normally <CODE>:0</CODE>) and their
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mouse cursors are enlarged automatically. The mouse cursors of clients
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that connect to <CODE>:0</CODE> will remain <EM>unchanged</EM>.
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</DL>
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<P>
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<HR>
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<A HREF="X-Big-Cursor-6.html">Next</A>
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<A HREF="X-Big-Cursor-4.html">Previous</A>
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<A HREF="X-Big-Cursor.html#toc5">Contents</A>
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</BODY>
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</HTML>
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