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Listen to the relevant view changes once in QQuickTumbler and cache
the offset/contentY instead of every QQuickTumblerAttached instance
doing its own geometry and child tracking, and cache the view offset
or contentY so that they are readily available while calculating
displacements for attached property objects.
This gives a 5% boost (40->42 frames in qmlbench) on TX1 in release
mode.
Change-Id: If1a77468e812e65bc07f32216ff9bf2e1dc5b935
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
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2c4b2d48 made Tumbler's wrap property follow its count by default,
but did so using updatePolish() to account for the use case where a
items are appended to the model in a for loop, as is done in
TumblerDatePicker.qml in Tumbler's auto tests. This (appending items
one at a time in a for loop) is not a good idea, but it should work.
The problem with the solution is that the delay means that the use
cases mentioned in the referenced bug report were broken.
This patch removes the delay. The recursion guards are necessary due to
the complex nature of TumblerView (and its non-standard use of the Qt
Quick views), as they prevent a memory leak in
QQuickListView::createHighlight() from being introuduced.
We now call deleteLater() to ensure we do not interfere with the views'
internal operations, and hence we also perform a few extra operations
at the same time as insurance (although it appears that simply
unparenting the internal view from QQuickTumblerView is enough to get
the tests to pass).
Task-number: QTBUG-61374
Change-Id: Ifef9e99522ea183b282ac862f346beaed12d0c09
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>
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Change-Id: If68cff4efacc7dc5719c8b8e61937e85e9076870
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
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[ChangeLog][Important Behavior Changes][Tumbler] Changed the default
value of wrap to be false when count is less than visibleItemCount.
Explicitly setting wrap overrides this behavior.
Change-Id: I0089f517a25a606625c245df52b0db5fd859ffc0
Task-number: QTBUG-53587
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>
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