D10855: Emit clicked when double click expires

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, graesslin.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.
broulik requested review of this revision.

REVISION SUMMARY
  Press and hold isn't particularly intuitive. Instead, when clicked and the mouse isn't moved away, the click is emitted (and as such the menu is opened) when the double click timeout expires. Press and hold still works mostly for touch input but is merged with double click handling to simplify it.

TEST PLAN
  Comes with unit test
  
  - Double click to close still works
  - Clicked, waited, menu opened
  - Pressed and held, waited, menu opened
  - With close on double click disabled behavior is as before, click just opens the menu

REPOSITORY
  R129 Window Decoration Library

REVISION DETAIL
  https://phabricator.kde.org/D10855

AFFECTED FILES
  autotests/decorationbuttontest.cpp
  src/decorationbutton.cpp
  src/decorationbutton_p.h

To: broulik, #plasma, graesslin
Cc: plasma-devel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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