CLIM mail archive


Screen update and feeling the bits between your toes

    Date: Fri, 11 Oct 1991 11:54 EDT
    From:	Jim Mayer <>

    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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