[Differential] [Request, 442 lines] D2464: [effects] Add new effect for touch point visualization

[graesslin (Martin Gräßlin)]

graesslin created this revision.
graesslin added reviewers: KWin, Plasma on Wayland, bshah.
Restricted Application added subscribers: kwin, plasma-devel.
Restricted Application added projects: Plasma on Wayland, KWin.

REVISION SUMMARY
  The new effect is based on the mouse click effect and uses the same
  rendering code (this could be improved by merging them better).
  
  Unlike mouse click there is no keyboard shortcut needed to activate:
  as soon as the effect is loaded all touch points are visualized.
  
  The visualization creates an animated circle for each touch down
  position, motion and up position. The ids are tracked and each touch
  id gets the same color. The first ten different touch ids get a
  different color. As touch ids are stable the first finger will always
  have the same color.

REPOSITORY
  rKWIN KWin

BRANCH
  touch-points-effect

REVISION DETAIL
  https://phabricator.kde.org/D2464

AFFECTED FILES
  autotests/test_builtin_effectloader.cpp
  effects/CMakeLists.txt
  effects/effect_builtins.cpp
  effects/touchpoints/touchpoints.cpp
  effects/touchpoints/touchpoints.h

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

To: graesslin, #kwin, #plasma_on_wayland, bshah
Cc: plasma-devel, kwin, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas
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