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| author | Błażej Szczygieł <spaz16@wp.pl> | 2017-11-10 23:52:17 +0100 |
|---|---|---|
| committer | Błażej Szczygieł <spaz16@wp.pl> | 2018-04-17 06:32:52 +0000 |
| commit | 5b09346cf4322704a866f253b911d467c40df3ba (patch) | |
| tree | 0b61b5548ac8dae08609bd349d241b2bc1f16f35 /src/plugins/platforms/ios/quiview.mm | |
| parent | 98ad498a46471d43a745cc61fd53e08e8a6b56dc (diff) | |
Widgets: Use accelerated scroll when scrolled widget is overlapped
Get region of overlapped widgets and scroll only non-overlapped parts
of image. Next, schedule an update for overlapped widgets region.
This patch improves scrolling performance when scrolled widget has
overlapped widgets.
Common use cases:
- faster scrolling when using "StyleHint::SH_ScrollBar_Transient",
- faster scrolling of zoomed image with semi-transparent thumbnail.
Accelerated scrolling with overlapped widgets is not available when
scale factor is non-integer.
Task-number: QTBUG-64504
Change-Id: I8337d3bc756e50f7d31cdc7979ccf86dc5c3695f
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Diffstat (limited to 'src/plugins/platforms/ios/quiview.mm')
0 files changed, 0 insertions, 0 deletions