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From: argv@turnpike.Eng.Sun.COM (Dan Heller)
Newsgroups: comp.windows.x.motif
Subject: Re: Loading pixmap in drawn button on color display?
Message-ID: <141346@sun.Eng.Sun.COM>
Date: 27 Aug 90 05:19:06 GMT
References: <1990Aug27.005946.5857@elroy.jpl.nasa.gov>
Sender: news@sun.Eng.Sun.COM
Organization: O'Reilly && Associates
Lines: 28

In article <1990Aug27.005946.5857@elroy.jpl.nasa.gov> pjs@aristotle.jpl.nasa.gov writes:
> (The bitmaps are from /usr/include/X11/bitmaps and I convert them
> to pixmaps with XReadBitmapFile).
...
> After a while of scratching my head, it dawned on me that the
> problem was in the drawnbutton, and was because the color w/s
> ihas an 8-bit deep display.  I recall reading something about
> this here lately.  Anyway, I tried setting the depth resource to
> 1 in the argument list in the widget creation call, but that didn't
> help.  How can I write something which works on mono and color
> displays?  More to the point, why can't the drawnbutton figure
> it out for itself???

It *could* figure this out for itself, but I guess they chose to
implement it that it doesn't leaving the responsibility to the
programmer.  the solution is to
    1) read the bitmap file.
    2) if DefaultDOfScreenepth() is  > 1
	a) create a _new_ pixmap that's the *same size* as the bitmap 
	b) Use XCopyPlane() to copy the 1-bit deep pixmap onto the
	    multi-depth pixmap.
    3) copy appropriate pixmap as resource value.

--
dan
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