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convert the function to a qgraphicswidget:

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sceneeventfilter appears to eat events always and in this way i can
remove elements from dragHandles when they get deleted

svn path=/trunk/KDE/kdelibs/; revision=1045818
This commit is contained in:
Marco Martin 2009-11-06 20:20:35 +00:00
parent 3639317617
commit ca60a5a6cf
2 changed files with 23 additions and 27 deletions
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44
widgets/scrollwidget.cpp
View File

@ -213,6 +213,11 @@ public:
(widget->pos() + delta).toPoint());
}
void cleanupDragHandles(QObject *destroyed)
{
dragHandles.remove(static_cast<QGraphicsWidget *>(destroyed));
}
ScrollWidget *q;
QGraphicsWidget *scrollingWidget;
QGraphicsWidget *widget;
@ -228,7 +233,7 @@ public:
Qt::ScrollBarPolicy horizontalScrollBarPolicy;
QString styleSheet;
QRectF rectToBeVisible;
QSet<QGraphicsItem *>dragHandles;
QSet<QGraphicsWidget *>dragHandles;
bool dragging;
int animId;
static const int borderSize = 4;
@ -345,9 +350,9 @@ void ScrollWidget::ensureItemVisible(QGraphicsItem *item)
QTimer::singleShot(0, this, SLOT(makeRectVisible()));
}
void ScrollWidget::registerAsDragHandle(QGraphicsItem *item)
void ScrollWidget::registerAsDragHandle(QGraphicsWidget *item)
{
if (!d->widget || !item) {
if (!d->widget || !item || d->dragHandles.contains(item)) {
return;
}
@ -360,14 +365,15 @@ void ScrollWidget::registerAsDragHandle(QGraphicsItem *item)
parentOfItem = parentOfItem->parentItem();
}
item->installSceneEventFilter(this);
connect(item, SIGNAL(destroyed(QObject *)), this, SLOT(cleanupDragHandles(QObject *)));
item->installEventFilter(this);
d->dragHandles.insert(item);
}
void ScrollWidget::unregisterAsDragHandle(QGraphicsItem *item)
void ScrollWidget::unregisterAsDragHandle(QGraphicsWidget *item)
{
if (item) {
item->removeSceneEventFilter(this);
item->removeEventFilter(this);
d->dragHandles.remove(item);
}
}
@ -482,24 +488,6 @@ void ScrollWidget::wheelEvent(QGraphicsSceneWheelEvent *event)
}
bool ScrollWidget::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
{
if (!d->widget && !scene()) {
return false;
}
if (d->dragHandles.contains(watched)) {
if (event->type() == QEvent::GraphicsSceneMousePress ||
event->type() == QEvent::GraphicsSceneMouseMove ||
event->type() == QEvent::GraphicsSceneMouseRelease) {
if (scene()) {
scene()->sendEvent(d->widget, event);
}
}
}
return false;
}
bool ScrollWidget::eventFilter(QObject *watched, QEvent *event)
{
if (!d->widget) {
@ -518,6 +506,14 @@ bool ScrollWidget::eventFilter(QObject *watched, QEvent *event)
d->verticalScrollBar->setValue(-d->widget->pos().y()/10);
d->horizontalScrollBar->blockSignals(false);
d->verticalScrollBar->blockSignals(false);
} else if (d->dragHandles.contains(static_cast<QGraphicsWidget *>(watched))) {
if (event->type() == QEvent::GraphicsSceneMousePress ||
event->type() == QEvent::GraphicsSceneMouseMove ||
event->type() == QEvent::GraphicsSceneMouseRelease) {
if (scene()) {
scene()->sendEvent(this, event);
}
}
}
return false;

6
widgets/scrollwidget.h
View File

@ -129,13 +129,13 @@ public:
* it's not necessary to call this function.
* @since 4.4
*/
void registerAsDragHandle(QGraphicsItem *item);
void registerAsDragHandle(QGraphicsWidget *item);
/**
* Unregister the given item as drag handle (if it was registered)
* @since 4.4
*/
void unregisterAsDragHandle(QGraphicsItem *item);
void unregisterAsDragHandle(QGraphicsWidget *item);
/**
* The geometry of the viewport.
@ -191,7 +191,6 @@ protected:
bool eventFilter(QObject *watched, QEvent *event);
void focusInEvent(QFocusEvent *event);
QSizeF sizeHint(Qt::SizeHint which, const QSizeF & constraint) const;
bool sceneEventFilter(QGraphicsItem *watched, QEvent *event);
private:
ScrollWidgetPrivate * const d;
@ -199,6 +198,7 @@ private:
Q_PRIVATE_SLOT(d, void verticalScroll(int value))
Q_PRIVATE_SLOT(d, void horizontalScroll(int value))
Q_PRIVATE_SLOT(d, void makeRectVisible())
Q_PRIVATE_SLOT(d, void cleanupDragHandles(QObject *destroyed))
};
} // namespace Plasma