Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uwm.edu!zaphod.mps.ohio-state.edu!brutus.cs.uiuc.edu!apple!snorkelwacker!bloom-beacon!EXPO.LCS.MIT.EDU!kit
From: kit@EXPO.LCS.MIT.EDU (Chris D. Peterson)
Newsgroups: comp.windows.x
Subject: Re: String to Pixmap conversion?
Message-ID: <9002201908.AA22930@expo.lcs.mit.edu>
Date: 20 Feb 90 19:08:15 GMT
References: <163@ria.ccs.uwo.ca>
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 34


> I follow this group fairly regularly and haven't seen this problem mentioned
> so I'm wondering what I'm doing wrong. I am trying to set things up in
> my .Xdefaults file so that Athena command widgets have a backgroundPixmap of
> (for arguments purposes) gray1. I gather (rightly or wrongly ?) from the
> manual that I can give the filename of the bitmap file I wish to be used as
> the value for backgroundPixmap and there will be an automagic conversion
> of String to Bitmap. The manual talks about String to Bitmap conversion
> although the Type required is Pixmap. The server (or whatever) realizes
> this and attempts to do the String to pixmap conversion and promptly
> throws up the following:

> Warning: No type converter registered for 'String' to 'Pixmap' conversion.

> Where am I going wrong?


The background pixmap of a window must be the same depth as the window to which
it is to be assigned.  Since there is not current standard way to convert a
string into a pixmap of arbitrary depth neither the intrinsics or the Athena
widgets define a string to pixmap converter.  The Athena widgets do, however,
define a string to Bitmap (1 bit deep Pixmap) converter.  This converter takes
the name of a bitmap file, and converts that to a 1 bit deep Pixmap.

You are specifying the resource correctly, there just is no coverter defined
(registered) that knows how to convert the string "gray1" into a pixmap of
arbitrary depth.

						Chris D. Peterson     
						MIT X Consortium 

Net:	 kit@expo.lcs.mit.edu
Phone:   (617) 253 - 9608	
Address: MIT - Room NE43-213