another question about gdk_window_shape_combine_mask(...)

["Xu, Jiang" <Jiang Xu echostar com>]

I have a call back function which will be called when receive a expose event
or configure event.
In the call back function, according to different conditions it will draw
different transparent pixmaps that using gdk_window_shape_combine_mask to
shape the window, sometimes it will draw multi transparent pixmaps.
However, looks like it is very low efficient, because I see the screen
flushing multi-times and my callback function being called
several times.
So, is that a good way to solve this??  Or is there a way I could know when
my callback function being called is because of calling
gdk_window_shape_combine_mask???

Thanks

Jiang

> -----Original Message-----
> From:	Havoc Pennington [SMTP:hp redhat com]
> Sent:	Tuesday, February 13, 2001 12:35 PM
> To:	Jiang XU
> Cc:	gtk-app-devel-list gnome org; gtk-list redhat com
> Subject:	Re: question about gdk_window_shape_combine_mask(...)
> 
> 
> Jiang XU <jiang xu echostar com> writes:
> > 
> > How to use gdk_window_shape_combine_mask( GdkWindow *, GdkBitmap *
> > shape_mask, gint offset_x, gint offset_y )????
> > 
> > What is "offset_x" and "offset_y" used for??  Is that to do with
> > "GdkBitmap *shape_mask"????
> > 
> 
> The position of the mask with respect to the window. i.e. where in the
> window is the mask located. Often 0,0 is correct.
> 
> Havoc