CLIM mail archive
Screen update and feeling the bits between your toes
Date: Fri, 11 Oct 1991 11:54 EDT
From: Jim Mayer <email@example.com>
Is there a mechanism within CLIM that would allow me to move areas of
screen real estate around without redrawing? The kind of think I am
thinking of is what most terminal emulators do when they insert a new
line: rather than redraw the bottom half of the screen, they BITBLT
the bottom half down one line height's worth of bits.
I have a working implementation of "pixmaps" for CLIM 1.0 for both
Genera and CLX, but have not yet installed it. I also don't know
exactly how to distribute it once it's installed.
Regardless of that, keep in mind that COPY-AREA (that's what I call it)
is a pure device-oriented operation. It does not move output records or
presentations, it just moves raw bits. If you want presentations to
move, you will have to move them yourself.
I know I have hacks that can benefit from even this very restricted
operation, but I don't know if it is enough for anyone else? Comments
on this, anyone?
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