D7640: QtCurve: reduce progressbar timer overhead

[René J.V. Bertin]

rjvbb added a comment.


  Actually we do when the last progressbar is hidden, destroyed (or gets a QEvent::Close, testing that now).
  
  The reason we need to run a timer when progressbars are visible is how their busy mode is implemented. That does not have a separate state and there's no signal that's sent when the state changes. As far as I've seen the only option is polling. I'll have a look at how Breeze and/or Oxygen do this.

REPOSITORY
  R626 QtCurve

REVISION DETAIL
  https://phabricator.kde.org/D7640

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