D5912: minimize dialog resizes/moves

[Marco Martin]

mart created this revision.
Restricted Application added projects: Plasma, Frameworks.
Restricted Application added subscribers: Frameworks, plasma-devel.

REVISION SUMMARY
  take into account size hints also when adjusting with synctomainitemsize
  which sometimes has to be executed right before adjusting from the layout
  hints, giving one wrong resize
  
  introduce geometryUpdatesBlocked, which stops the dialog
  from syncing which is useful when both visual parent and item
  contents gets updated in one go (the tooltip) it is not
  yet exported to qml and it shouldn't as is dangerous, but
  kicker may make use of it between changing the submenu model and
  the visualparent
  
  alternative implementations may be:
  
  - a method that takes both main item and visual parent
  - delaying with a timer setGeometry (ouch)
  
  this part can also be left behind for now and see if the rest is good enough

TEST PLAN
  no visual glitches visible anymore in wayland when moving the tooltip
  in the taskbar, x11 ok too

REPOSITORY
  R242 Plasma Framework (Library)

BRANCH
  phab/dialogresize

REVISION DETAIL
  https://phabricator.kde.org/D5912

AFFECTED FILES
  src/declarativeimports/core/tooltip.cpp
  src/plasmaquick/dialog.cpp
  src/plasmaquick/dialog.h

To: mart, #plasma
Cc: plasma-devel, #frameworks, ZrenBot, spstarr, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, lukas
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