On Sat, Jun 21, 2014 at 10:35 AM, Jean Brefort <jean.bref...@normalesup.org> wrote:
> In gnumeric this arised when we draw an animated rectangle around the > selected rectangle. When using the draw event, we need to repaint > everything inside the rectangle and this made gnumeric quite > unresponsive when there were many cells displayed at once. > i don't believe that this is true, but thanks for the explanation. A draw/expose event contains a list of rectangles which need not be contiguous. It is only a matter of convenience to use the GdkRectangle that is also supplied. You can invalidate the "border" around the cell. We do this in ardour, especially in our new canvas, where we frequently queue discontiguous areas of the screen for drawing - when we render we do not draw the union of all these areas, just each rectangle in the list of regions.
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