🚀 go-pugleaf

> Just before you make the pixmap install an XErrorHandler using
> XSetErrorHandler(). If you get an X error the program will go to the function
> you've declared. Remove the error handler afterwards tho!

There's a gotcha waiting to getcha here.  Don't forget that
X is asynchronous, so the error will not be reported until
the next time Xlib sends its queue of requests over to the server,
and the server crunches through them to the one containing
the huge pixmap.  In other words, it may be awhile before you
get this error.  If you're not careful, the error handler may
be removed before the error happens.
So you cannot remove the error handler until
you are sure the server has already passed the big pixmap.
Probably the easiest thing to do is not to remove the error handler.

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Adrian Nye (314) 531-1231    Editor, The X Resource
O'Reilly & Associates, Inc., Publishers of Nutshell Handbooks
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