Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!decwrl!elroy.jpl.nasa.gov!aristotle!pjs
From: pjs@aristotle.JPL.NASA.gov (Peter Scott)
Newsgroups: comp.windows.x.motif
Subject: Loading pixmap in drawn button on color display?
Message-ID: <1990Aug27.005946.5857@elroy.jpl.nasa.gov>
Date: 27 Aug 90 00:59:46 GMT
Sender: news@elroy.jpl.nasa.gov (Usenet)
Reply-To: pjs@aristotle.jpl.nasa.gov
Followup-To: comp.windows.x.motif
Organization: Jet Propulsion Laboratory, NASA/Caltech
Lines: 26
Nntp-Posting-Host: aristotle.jpl.nasa.gov

I have an application which fills a drawnbutton with a pixmap
read from a file picked by the user so they can preview it.
(The bitmaps are from /usr/include/X11/bitmaps and I convert them
to pixmaps with XReadBitmapFile).  Worked fine on our monochrome
displays.  I just went to a color workstation that I have occasional
access to, and got the error

X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  55 (X_CreateGC)
  Minor opcode of failed request:  0
  Resource id in failed request:  0x800025
  Serial number of failed request:  57
  Current serial number in output stream:  122

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???

--
This is news.  This is your       |    Peter Scott, NASA/JPL/Caltech
brain on news.  Any questions?    |    (pjs@aristotle.jpl.nasa.gov)