WindowPort::DevUpdate()

ET++: Stepping through the redraw of a changed ImageItem

The WindowPort handles the redraw by calling WindowPort::UpdateRect() for each invalid rectangle in its invalid region. In essence, each previous call to VObject::InvalidateRect() queued up a rectangular area for redraw, and this method iterates over this queue and redraws all the rectangular areas.

void WindowPort::DevUpdate()
{
	if (inval && inval->size > 0) {
		OldRegion *old= inval;
		inval= 0;
		Rectangle *ir;
		
		for (int i= 0; ir= old->GetAt(i); i++) {
			UpdateRect(*ir);
			GiveHint(eHintUnbatch, 0, 0);
		}
		delete old;
	}
}

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