First off, I'd create a buffer GdkPixmap or a GdkRGB buffer. Then on then on the expose event for your GtkDrawingArea, I'd write the buffer to the screen (the drawing area's window). I'd set the configure event callback for the GtkDrawingArea to manage the buffer and resize it if needed when the window changes size, etc. Then in your timeout callback that gets called every second (gtk_widget_add_timeout), write to the buffer and then call gtk_widget_draw(), which will synthesize an expose event. Basically if you use this double-buffering scheme, then you don't have to do anything special when the window is uncovered and asked to repaint itself. You just copy the buffer onto the DrawingArea on an expose event. All changes can be to the buffer which will be displayed by the expose handler (which can be triggered by gtk_widget_draw and gtk_widget_queue_draw). Michael On Sat, 2002-08-03 at 07:39, simith nambiar wrote: > hi list, > i managed to open and display an image > using GtkImage with help from the list though! > i wanted to do that adding a timeout every 1 second > so i add an event expose and how do i write the expose > code ? > > i want to do something like this every 1 second on > expose event called i just want to open a new image > and display it , but nothing happenning for me ! > > regards, > simith > > ===== > <P><A href="http://www.mcamit.8k.com";>http://www.mcamit.8k.com</A> > <P><A href="http://www.dblocks.8k.com";>http://www.dblocks.8k.com</A> </P> > > ________________________________________________________________________ > Want to sell your car? advertise on Yahoo Autos Classifieds. It's Free!! > visit http://in.autos.yahoo.com > _______________________________________________ > gtk-list mailing list > gtk-list gnome org > http://mail.gnome.org/mailman/listinfo/gtk-list -- Public key available from http://students.cs.byu.edu/~torriem
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