65 lines
2.7 KiB
Diff
65 lines
2.7 KiB
Diff
From 0d31aa1617c96ed3e3624d77332ea6f13aba1492 Mon Sep 17 00:00:00 2001
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From: David Edmundson <davidedmundson@kde.org>
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Date: Thu, 23 Apr 2015 15:01:24 +0200
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Subject: [PATCH 67/68] Avoid calling potentially pure virtual method
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In Qt 5.4 screenChanged is called indirectly from the destructor of
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QPlatformScreen. By comparing new values against the oldScreen we call
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call virtual methods of QPlatformScreen from it's own destructor which
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results in a crash.
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This patch simply emits change signals whenever a screen change regardless
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of whether the value differs from the previous screen. Arguably less
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efficient, but better than crashing.
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This fix is not needed in Qt 5.5 where the QPA architecture has changed.
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Task-number: QTBUG-45753
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Change-Id: Ic155906928855a377add9b21bff9e72b31f4667e
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Reviewed-by: Alan Alpert <aalpert@blackberry.com>
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---
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src/quick/items/qquickscreen.cpp | 27 +++++++++------------------
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1 file changed, 9 insertions(+), 18 deletions(-)
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diff --git a/src/quick/items/qquickscreen.cpp b/src/quick/items/qquickscreen.cpp
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index c4d1407..0900adb 100644
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--- a/src/quick/items/qquickscreen.cpp
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+++ b/src/quick/items/qquickscreen.cpp
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@@ -347,24 +347,15 @@ void QQuickScreenAttached::screenChanged(QScreen *screen)
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emit orientationUpdateMaskChanged();
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}
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- if (!oldScreen || screen->size() != oldScreen->size()) {
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- emit widthChanged();
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- emit heightChanged();
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- }
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- if (!oldScreen || screen->name() != oldScreen->name())
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- emit nameChanged();
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- if (!oldScreen || screen->orientation() != oldScreen->orientation())
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- emit orientationChanged();
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- if (!oldScreen || screen->primaryOrientation() != oldScreen->primaryOrientation())
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- emit primaryOrientationChanged();
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- if (!oldScreen || screen->availableVirtualGeometry() != oldScreen->availableVirtualGeometry())
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- emit desktopGeometryChanged();
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- if (!oldScreen || screen->logicalDotsPerInch() != oldScreen->logicalDotsPerInch())
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- emit logicalPixelDensityChanged();
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- if (!oldScreen || screen->physicalDotsPerInch() != oldScreen->physicalDotsPerInch())
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- emit pixelDensityChanged();
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- if (!oldScreen || screen->devicePixelRatio() != oldScreen->devicePixelRatio())
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- emit devicePixelRatioChanged();
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+ emit widthChanged();
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+ emit heightChanged();
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+ emit nameChanged();
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+ emit orientationChanged();
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+ emit primaryOrientationChanged();
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+ emit desktopGeometryChanged();
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+ emit logicalPixelDensityChanged();
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+ emit pixelDensityChanged();
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+ emit devicePixelRatioChanged();
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connect(screen, SIGNAL(geometryChanged(QRect)),
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this, SIGNAL(widthChanged()));
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--
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2.3.7
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