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QPlatformWindow: Extract static method for closestAcceptableGeometry().

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On Windows, some messages occur before a QPlatformWindow is actually
created, for example WM_WINDOWPOSCHANGING, which is handled in
QWindowsWindow::handleGeometryChangingMessage().

Extract a static function QPlatformWindow::closestAcceptableGeometry()
from QPlatformWindow::windowClosestAcceptableGeometry() and use
that in QWindowsWindow::handleGeometryChangingMessage().

This fixes a regression crash occurring in Qt 5.6 when running
the example from QTBUG-48201.

Task-number: QTBUG-36220
Task-number: QTBUG-48201
Task-number: QTBUG-46615
Change-Id: I86b8f923447c8e447382427cf5795628ef1c9717
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
This commit is contained in:
Friedemann Kleint 2015-09-15 12:12:51 +02:00
parent 2978caa2ed
commit 42c6ea4f6c
3 changed files with 10 additions and 4 deletions
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11
src/gui/kernel/qplatformwindow.cpp
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@ -702,15 +702,20 @@ QRect QPlatformWindow::windowFrameGeometry() const
a resize/move event for platforms that support it, for example to
implement heightForWidth().
*/
QRectF QPlatformWindow::windowClosestAcceptableGeometry(const QRectF &nativeRect) const
QRectF QPlatformWindow::closestAcceptableGeometry(const QWindow *qWindow, const QRectF &nativeRect)
{
QWindow *qWindow = window();
const QRectF rectF = QHighDpi::fromNativePixels(nativeRect, qWindow);
const QRectF correctedGeometryF = qt_window_private(qWindow)->closestAcceptableGeometry(rectF);
const QRectF correctedGeometryF = qt_window_private(const_cast<QWindow *>(qWindow))->closestAcceptableGeometry(rectF);
return !correctedGeometryF.isEmpty() && rectF != correctedGeometryF
? QHighDpi::toNativePixels(correctedGeometryF, qWindow) : nativeRect;
}
QRectF QPlatformWindow::windowClosestAcceptableGeometry(const QRectF &nativeRect) const
{
return QPlatformWindow::closestAcceptableGeometry(window(), nativeRect);
}
/*!
\class QPlatformWindow
\since 4.8

1
src/gui/kernel/qplatformwindow.h
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@ -140,6 +140,7 @@ public:
QRect windowGeometry() const;
QRect windowFrameGeometry() const;
QRectF windowClosestAcceptableGeometry(const QRectF &nativeRect) const;
static QRectF closestAcceptableGeometry(const QWindow *w, const QRectF &nativeRect);
protected:
static QString formatWindowTitle(const QString &title, const QString &separator);

2
src/plugins/platforms/windows/qwindowswindow.cpp
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@ -1825,7 +1825,7 @@ bool QWindowsWindow::handleGeometryChangingMessage(MSG *message, const QWindow *
const QRect suggestedFrameGeometry(windowPos->x, windowPos->y,
windowPos->cx, windowPos->cy);
const QRect suggestedGeometry = suggestedFrameGeometry - margins;
const QRectF correctedGeometryF = qWindow->handle()->windowClosestAcceptableGeometry(suggestedGeometry);
const QRectF correctedGeometryF = QPlatformWindow::closestAcceptableGeometry(qWindow, suggestedGeometry);
if (!correctedGeometryF.isValid())
return false;
const QRect correctedFrameGeometry = correctedGeometryF.toRect() + margins;