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From: cjmchale@cs.tcd.ie (Ciaran McHale)
Newsgroups: comp.windows.x
Subject: Re: Cursor implementation
Message-ID: <1991Apr17.201549.28248@cs.tcd.ie>
Date: 17 Apr 91 20:15:49 GMT
References: <9103251415.AA26899@crc.skl.dnd.ca> <1991Apr16.032544.14016@leland.Stanford.EDU>
Organization: DSG, Dept. of Comp. Sci., Trinity College, Dublin.
Lines: 37

In <1991Apr16.032544.14016@leland.Stanford.EDU>
goins@elaine30.Stanford.EDU (daryl goins) writes:


>I am trying to write some graphics in a XwworkSpaceWidget but I am getting 
>a window error.  Specifically, I have the following code 

>void main(argc, argv)
>int argc;
>char **argv;
>{
>    [...]
>    printf("main %d, toplevel, %d framework %d\n",XtWindow(mainWindow),
>	   XtWindow(topLevel), XtWindow(framework));
>
>    XtRealizeWidget(topLevel);
>    XtAppMainLoop(app_con);
>}
>
>when I print out the window values I get:
>main 0	toplevel 0 framework 0
>
>Obviously I'm doing something wrong, if anyone knows, I would 
>really really appreciate any advice.

The windows of the widgets are not created until the call to
XtRealizeWidget(); hence the value None (#defined to be 0) is returned.
If you put the XtRealizeWidget() before the printf then you'll get
non-zero values printed out.


Ciaran.
-- 
Ciaran McHale      "I have some faults, but modesty isn't one of them."  ----
Department of Computer Science, Trinity College, Dublin 2, Ireland.      \  /
Telephone: +353-1-772941 ext 1538       FAX: +353-1-772204                \/
Telex: 93782 TCD EI                     email: cjmchale@cs.tcd.ie