Re: Copying X pixmap.

[Shannon Rause <gtk-list indpkgsup com>]

I actually tried three of the solutions that were mentioned--disabling 
the double-buffering, using the internal pixmap, and setting the 
background pixmap (not at once, of course).  All three worked but I 
ended up sticking with the background pixmap as I need to be able to 
scroll the window and that seemed the cleanest way to get it going.

Thanks for all the help,
smr

Brett Granger wrote:

> Shannon Rause wrote:
>
> > First, sorry if this gets posted twice *
> >
> > Can someone point me in the proper direction on how to do this...
> >
> > I have an X pixmap (Pixmap) and I would like to copy its contents onto a
> > GdkWindow.  I have tried to use XCopyArea() to do this but it appears 
> > that
> > the background is redrawn over the copied pixmap.  I set it up so the
> > XCopyArea() occurs in the windows expose event. You can actually see the
> > pixmap contents as it blinks when you resize the window but it is
> > immediately replaced by the standard gray background color.  Can someone
> > tell me what I may be doing wrong?
> >
> > Thanks.
>
>
> Are you trying to make the pixmap the background of the window, or 
> just a pixmap widget that can be displayed anywhere in the window?  
> I'm assuming it has to be an X Pixmap and you can't use 
> gtk_pixmap_new_from_file or some related call?  You can wrap the X 
> pixmap in a gdk pixmap by using gdk_pixmap_foreign_new().  You can set 
> the window background to it with gdk_window_set_back_pixmap().  You 
> may also need to call gtk_widget_set_app_paintable() to stop the 
> default background from being drawn over top of the pixmap.
>
> Good luck!
> --Brett