invalid regions

[Krzysztof Garus <bajcik kolos math uni lodz pl>]

hello,

I am using a list widget written by me in my program. This list uses
GtkDrawingArea to display rows.
 - If I need to refresh some rows, I do gtk_widget_queue_draw_area().
 - When I scrolling my list, I use gdk_window_copy_area(), and
   gtk_widget_queue_draw_area() on uncovered area.

The problem is: in heavy loadavg there can be few scrolls between one
expose event, so gdk_window_copy_area copies invalid area.

What is optimal way to fix this?

bajcik
PS. The program's address I've talked about is in signature
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