[393] in java-interest
XOR Graphics and Mouse Capture implemented !
daemon@ATHENA.MIT.EDU (Randy Gordon - Sun Victoria SE)
Mon Jun 19 16:27:46 1995
Date: Mon, 19 Jun 1995 13:05:26 -0700
From: randyg@Canada.Sun.COM (Randy Gordon - Sun Victoria SE)
To: java-interest@java.Eng.Sun.COM
Hello all,
If anyone is interested, I have implemented some temporary extensions
to the libawt.so library and awt class libraries for Java on Solaris.
These extensions are necessary to implement "rubber banding" operations,
and any other type of operation requiring pointer event capture.
Now I can proceed with my drawing project in Java!
The extensions are:
Graphics.xorMode(); // Foreground will XOR with background pixels
Graphics.paintMode(); // Foreground will replace background pixels
Window.setCapture(); // Implements a server-side X toolkit grab of
Window.releaseCapture(); // pointer movement, press, and release events
Note: THESE ARE NOT OFFICIALLY SANCTIONED EXTENSIONS!!!
Although I am a Sun employee, I am not involved in the Java project.
I have no idea how these types of operations will be implemented in
the production version of AWT. At least these extensions should allow
you to proceed if you "really need" these functions to prototype
applications. The names of the functions may be different when/if
they are officially implemented in AWT. Use at your own risk!
I have done minimal testing on these extensions and they appear to
work as I expect. If you call setCapture make sure you eventually call
releaseCapture or you will have to restart your X server! The semantics
of these functions is similar to those encountered in "Windows 3.x"
programming.
Let me know if you will find these useful and I will send instructions on
how to tweak your Java source code.
Cheers, Randy
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