On Wed, Jun 4, 2014 at 11:19 PM, Paul Davis
<paul@xxxxxxxxxxxxxxxxxxxxx> wrote:
You should know that GTK's design more or less does not cater to
overlapping GtkWidgets. It is not completely clear if you are
actually doing this, but it certainly sounds as if you are. The API
allows you to create overlapping widgets, but nothing else in the API
(though I admit to knowing GTK3 not as well as I should) defines
event handling when this happens. Z-axis (or "stacking) ordering
needs to be defined for this to be done rationally. GTK does not
provide this as far as I know (GTK2 definitely does not and I don't
think GTK3 changed this).
It seems to be behaving perfectly sensibly. Scroll events go to the
widget directly under the pointer, whether that's the overlaid or the
underlying widget, and the bubble up through the parents. What I'm
asking (I think) is if there's a way to change that sensible behavior.
(And I have found one, but it involves scroll-event handlers on every
widget.)
We don't need to consider overlays, if that's worrisome. Consider a
composite widget, say an EventBox with a whole hierarchy of children.
Is there some way to make one type of event go directly to the
EventBox, while others go through to the children? I'd hoped I could
do this with set_above_child() and set_events(), but I haven't been
able to make that work.
Thanks,
Robert
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