Chris Cannam wrote:
It only happens when you're dragging the selection rectangle -- that's
probably how. The point is that it seems to provoke redraws of segments that
are nowhere near the selection rectangle as well as those that are. In fact
it seems to provoke redraws even if there are no segments in the rectangle
and never have been.
Maybe this is by design and it's just much harder to constrain the refresh and
get it right than it is to refresh everything each time. If it's a genuine
tradeoff rather than a mistake, then maybe we just have to live with it.
No, there's some logic in CompositionModelImpl::setSelectionRect(), but
it's obviously not perfect. It's bound to update more than needed at
some point, for isntance it can happen if a segment is within the rect
formed by the union of the selection rect and a newly
selected/deselected segment. But updating segments even if no selection
has ever occurred is a bug.
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