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Fix drag and drop with native widgets

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Task-number: QTBUG-27336

Don't check 'widget != m_widget' in
QWidgetWindow::handleDragEnterMoveEvent() since the current window's
parent widget may be the actual drop target. I replace it with a check
'!widget->isWindow()' to prevent we pass through a top level window.
I also change 'widget->mapFrom(m_widget, event->pos())' to
'widget->mapFromGlobal(m_widget->mapToGlobal(event->pos()))' since m_widget
may not be widget's parent.

Change-Id: Ia4f10f85ccdf1e27223ddc51afabd98b5d16f2fb
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
This commit is contained in:
jian liang 2012-09-25 21:33:55 +08:00 committed by The Qt Project
parent f9547c89ea
commit 0a7e8350ae
2 changed files with 30 additions and 5 deletions
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8
src/widgets/kernel/qwidgetwindow.cpp
View File

@ -443,13 +443,13 @@ void QWidgetWindow::handleDragEnterMoveEvent(QDragMoveEvent *event)
QWidget *widget = m_widget->childAt(event->pos());
if (!widget)
widget = m_widget;
for ( ; widget && widget != m_widget && !widget->acceptDrops(); widget = widget->parentWidget()) ;
for ( ; widget && !widget->isWindow() && !widget->acceptDrops(); widget = widget->parentWidget()) ;
if (widget && !widget->acceptDrops())
widget = 0;
// Target widget unchanged: DragMove
if (widget && widget == m_dragTarget.data()) {
Q_ASSERT(event->type() == QEvent::DragMove);
const QPoint mapped = widget->mapFrom(m_widget, event->pos());
const QPoint mapped = widget->mapFromGlobal(m_widget->mapToGlobal(event->pos()));
QDragMoveEvent translated(mapped, event->possibleActions(), event->mimeData(), event->mouseButtons(), event->keyboardModifiers());
translated.setDropAction(event->dropAction());
QGuiApplication::sendSpontaneousEvent(widget, &translated);
@ -472,7 +472,7 @@ void QWidgetWindow::handleDragEnterMoveEvent(QDragMoveEvent *event)
return;
}
m_dragTarget = widget;
const QPoint mapped = widget->mapFrom(m_widget, event->pos());
const QPoint mapped = widget->mapFromGlobal(m_widget->mapToGlobal(event->pos()));
QDragEnterEvent translated(mapped, event->possibleActions(), event->mimeData(), event->mouseButtons(), event->keyboardModifiers());
QGuiApplication::sendSpontaneousEvent(widget, &translated);
if (translated.isAccepted()) {
@ -492,7 +492,7 @@ void QWidgetWindow::handleDragLeaveEvent(QDragLeaveEvent *event)
void QWidgetWindow::handleDropEvent(QDropEvent *event)
{
const QPoint mapped = m_dragTarget.data()->mapFrom(m_widget, event->pos());
const QPoint mapped = m_dragTarget.data()->mapFromGlobal(m_widget->mapToGlobal(event->pos()));
QDropEvent translated(mapped, event->possibleActions(), event->mimeData(), event->mouseButtons(), event->keyboardModifiers());
QGuiApplication::sendSpontaneousEvent(m_dragTarget.data(), &translated);
if (translated.isAccepted())

27
tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
View File

@ -409,7 +409,13 @@ static const char *expectedLogC[] = {
"acceptingDropsWidget2::dragMoveEvent at 1,31 action=1 MIME_DATA_ADDRESS 'testmimetext'",
"Event at 11,241 accepted",
"acceptingDropsWidget2::dropEvent at 1,51 action=1 MIME_DATA_ADDRESS 'testmimetext'",
"Event at 11,261 accepted"
"Event at 11,261 accepted",
"acceptingDropsWidget1::dragEnterEvent at 10,10 action=1 MIME_DATA_ADDRESS 'testmimetext'",
"Event at 0,0 accepted",
"acceptingDropsWidget1::dragMoveEvent at 11,11 action=1 MIME_DATA_ADDRESS 'testmimetext'",
"Event at 1,1 accepted",
"acceptingDropsWidget1::dropEvent at 12,12 action=1 MIME_DATA_ADDRESS 'testmimetext'",
"Event at 2,2 accepted"
};
// A widget that logs the DnD events it receives into a QStringList.
@ -497,6 +503,12 @@ void tst_QWidget_window::tst_dnd()
dropsAcceptingWidget1->resize(180, 80);
dropsAcceptingWidget1->move(10, 110);
// Create a native widget on top of dropsAcceptingWidget1 to check QTBUG-27336
QWidget *nativeWidget = new QWidget(dropsAcceptingWidget1);
nativeWidget->resize(160, 60);
nativeWidget->move(10, 10);
nativeWidget->winId();
QWidget *dropsAcceptingWidget2 = new DnDEventLoggerWidget(&log, &dndTestWidget);
dropsAcceptingWidget2->setAcceptDrops(true);
dropsAcceptingWidget2->setObjectName(QLatin1String("acceptingDropsWidget2"));
@ -535,6 +547,19 @@ void tst_QWidget_window::tst_dnd()
}
}
window = nativeWidget->windowHandle();
QDragEnterEvent enterEvent(QPoint(0, 0), Qt::CopyAction, &mimeData, Qt::LeftButton, Qt::NoModifier);
qApp->sendEvent(window, &enterEvent);
log.push_back(msgEventAccepted(enterEvent));
QDragMoveEvent moveEvent(QPoint(1, 1), Qt::CopyAction, &mimeData, Qt::LeftButton, Qt::NoModifier);
qApp->sendEvent(window, &moveEvent);
log.push_back(msgEventAccepted(moveEvent));
QDropEvent dropEvent(QPoint(2, 2), Qt::CopyAction, &mimeData, Qt::LeftButton, Qt::NoModifier);
qApp->sendEvent(window, &dropEvent);
log.push_back(msgEventAccepted(dropEvent));
// Compare logs.
QStringList expectedLog;
const int expectedLogSize = int(sizeof(expectedLogC) / sizeof(expectedLogC[0]));