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Fix DnD when using QSimpleDrag.

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qApp->topLevelAt() returns the QShapedPixmapWindow that the DnD
operation created, but what we want is the QWidgetWindow.

QWidgetWindow has the code to handle QDragMove events.

In Qt4, QShapedPixmapWidget had a parent, so was never returned
by qApp->topLevelWidgets().

In Qt5 we must filter it out. Bug is visible in the QNX plugin,
which is the only user of QSimpleDrag.

Change-Id: I920da86f3a1a92ce8e087f5948292fa4c68d4d81
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
This commit is contained in:
Sergio Martins 2013-01-07 12:27:44 +00:00 committed by The Qt Project
parent 25ae390461
commit 742f0c6e0b
2 changed files with 15 additions and 3 deletions
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1
src/platformsupport/dnd/qshapedpixmapdndwindow_p.h
View File

@ -52,6 +52,7 @@ QT_BEGIN_HEADER
class QShapedPixmapWindow : public QWindow
{
Q_OBJECT
public:
QShapedPixmapWindow();

17
src/platformsupport/dnd/qsimpledrag.cpp
View File

@ -68,6 +68,17 @@ QT_BEGIN_NAMESPACE
#ifndef QT_NO_DRAGANDDROP
static QWindow* topLevelAt(const QPoint &pos)
{
QWindowList list = QGuiApplication::topLevelWindows();
for (int i = list.count()-1; i >= 0; --i) {
QWindow *w = list.at(i);
if (w->isVisible() && w->geometry().contains(pos) && !qobject_cast<QShapedPixmapWindow*>(w))
return w;
}
return 0;
}
/*!
\class QBasicDrag
\brief QBasicDrag is a base class for implementing platform drag and drop.
@ -298,7 +309,7 @@ QMimeData *QSimpleDrag::platformDropData()
void QSimpleDrag::startDrag()
{
QBasicDrag::startDrag();
m_current_window = QGuiApplication::topLevelAt(QCursor::pos());
m_current_window = topLevelAt(QCursor::pos());
if (m_current_window) {
QPlatformDragQtResponse response = QWindowSystemInterface::handleDrag(m_current_window, drag()->mimeData(), QCursor::pos(), drag()->supportedActions());
setCanDrop(response.isAccepted());
@ -321,7 +332,7 @@ void QSimpleDrag::cancel()
void QSimpleDrag::move(const QMouseEvent *me)
{
QBasicDrag::move(me);
QWindow *window = QGuiApplication::topLevelAt(me->globalPos());
QWindow *window = topLevelAt(me->globalPos());
if (!window)
return;
@ -336,7 +347,7 @@ void QSimpleDrag::move(const QMouseEvent *me)
void QSimpleDrag::drop(const QMouseEvent *me)
{
QBasicDrag::drop(me);
QWindow *window = QGuiApplication::topLevelAt(me->globalPos());
QWindow *window = topLevelAt(me->globalPos());
if (!window)
return;