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| author | Richard Moe Gustavsen <richard.gustavsen@nokia.com> | 2009-12-09 14:30:10 (GMT) |
|---|---|---|
| committer | Richard Moe Gustavsen <richard.gustavsen@nokia.com> | 2009-12-09 14:49:12 (GMT) |
| commit | 445f8bbd9709b712fa253fe1833bbf9416429603 (patch) | |
| tree | ca8f0d1a4e0eae20a109a689bb803af53ebebe9f /src/gui/kernel/qcocoaview_mac.mm | |
| parent | fc73e6e67b4048a7fa79d041ee609bea508aff07 (diff) | |
| download | Qt-445f8bbd9709b712fa253fe1833bbf9416429603.zip Qt-445f8bbd9709b712fa253fe1833bbf9416429603.tar.gz Qt-445f8bbd9709b712fa253fe1833bbf9416429603.tar.bz2 | |
Cocoa: scrolling viewports containing many widgets is slow
One of the reasons is that [NSView resetCursorRects] is called
for each view, also the ones not actually visible. And the
function is slow. This patch does an early check, and bails out
if this is the case.
Reviewed-by: Prasanth
Diffstat (limited to 'src/gui/kernel/qcocoaview_mac.mm')
| -rw-r--r-- | src/gui/kernel/qcocoaview_mac.mm | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/gui/kernel/qcocoaview_mac.mm b/src/gui/kernel/qcocoaview_mac.mm index 1039a75..311cf24 100644 --- a/src/gui/kernel/qcocoaview_mac.mm +++ b/src/gui/kernel/qcocoaview_mac.mm @@ -227,6 +227,10 @@ extern "C" { - (void)resetCursorRects { + // [NSView addCursorRect] is slow, so bail out early if we can: + if (NSIsEmptyRect([self visibleRect])) + return; + QWidget *cursorWidget = qwidget; if (cursorWidget->testAttribute(Qt::WA_TransparentForMouseEvents)) |