It seems like it would be better if clients got the touch events first,
and the compositor only did things if the client said it was
uninterested in the events. For a lot of touch events this can be
decided immediately on the touch-down, since the client knows the user
is pushing nothing.
I don't know much about touch events, but this seems similar to global
shortcuts. It would help a lot if every keystroke was sent to clients
but the clients could say "I don't do anything with that" and then the
compositor/shell could use the keystroke as a global shortcut, and in
fact I thought this was what Wayland was going to do. It seems the same
ideas should apply to other events like touch.
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