D6215: Make sure size is final after showEvent

[Marco Martin]

mart added a comment.


  In https://phabricator.kde.org/D6215#117370, @mart wrote:
  
  > it's maybe due to the layout of actions buttons that changes (in the notification applet, populatepopup) but this (columnLayout computed height) doesn't really have effect until it's visible.
  
  
  in fact, if in the notification applet i do, right before setVisible():
  popup->property("mainItem").value<QQuickItem*>()->setVisible(true);
  
  making mainitem visible just before the showevent, 
  then the look is correct.
  
  if i do that right in the showevent handler, it's too late and i get wrongly calculate sizes and spurious extra resize events

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D6215

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