[Differential] [Request, 195 lines] D1329: [server] Support sub-surfaces from PointerInterface

[graesslin (Martin Gräßlin)]

graesslin created this revision.
graesslin added a reviewer: Plasma.
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REVISION SUMMARY
  The idea behind this change is to make the existance of sub-surfaces
  an implementation detail for pointer events. The user of the library
  does not need to care about on which sub-surface the pointer is on.
  It only needs to care about the main surface and passes the focus to
  the main surface.
  
  Internally the PointerInterface takes care of sending the enter to
  the sub-surface at the current pointer position. Also whenever the
  pointer position changes, the PointerInterface evaluates whether it
  triggered a change for the focused sub-surface and sends enter/leave
  events accordingly. If the focused sub-surface does not change, it
  sends motion events as normally, but of course under consideration
  of the sub-surface position.
  
  Overall this means that from pointer usage perspective a user of the
  library doesn't need to care about the fact that there are sub-surfaces
  at all. The library does the correct thing for it.

REPOSITORY
  rKWAYLAND KWayland

BRANCH
  pointer-sub-surface

REVISION DETAIL
  https://phabricator.kde.org/D1329

AFFECTED FILES
  autotests/client/test_wayland_seat.cpp
  src/server/pointer_interface.cpp

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: graesslin, Plasma
Cc: plasma-devel, sebas
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