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Overrode sceneEvent() rather than hover(Enter|Leave)Event so that subclasses

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that use those events (such as Icon) can still have tooltips. Also behaviour
on mouse move, mouse click and mouse wheel events is also managed.

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=754605
This commit is contained in:
Jason Stubbs 2007-12-30 10:45:21 +00:00
parent f3e52b76cb
commit c268168eab
2 changed files with 38 additions and 26 deletions
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60
widgets/widget.cpp
View File

@ -549,36 +549,48 @@ void Widget::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
}
}
void Widget::hoverEnterEvent(QGraphicsSceneHoverEvent *e)
bool Widget::sceneEvent(QEvent *event)
{
if (d->toolTip.image.isNull() &&
d->toolTip.subText.isEmpty() &&
d->toolTip.mainText.isEmpty()) {
switch (event->type()) {
case QEvent::GraphicsSceneHoverMove:
// If the tooltip isn't visible, run through showing the tooltip again
// so that it only becomes visible after a stationary hover
if (ToolTip::instance()->isVisible()) {
break;
}
return; //Nothing to show
case QEvent::GraphicsSceneHoverEnter:
{
// Check that there is a tooltip to show
if (d->toolTip.image.isNull() &&
d->toolTip.subText.isEmpty() &&
d->toolTip.mainText.isEmpty()) {
break;
}
// If the mouse is in the widget's area at the time that it is being
// created the widget can receive a hover event before it is fully
// initialized, in which case view() will return 0.
QGraphicsView *parentView = view();
if (parentView) {
QPoint viewPos = parentView->mapFromScene(scenePos());
QPoint globalPos = parentView->mapToGlobal(viewPos);
ToolTip::instance()->show(globalPos, this);
}
break;
}
// If the mouse is in the widget's area at the time that it is being created
// the widget can receive a hover event before it is fully initialized, in
// which case view() will return 0.
QGraphicsView *parentView = view();
if (!parentView) {
kDebug() << "no parent view";
return;
case QEvent::GraphicsSceneHoverLeave:
case QEvent::GraphicsSceneMousePress:
case QEvent::GraphicsSceneWheel:
ToolTip::instance()->hide();
default:
break;
}
if (parentView->mouseGrabber()) {
return; // Someone has the mouse (eg. a context menu)
}
QPoint viewPos = parentView->mapFromScene(scenePos());
QPoint globalPos = parentView->mapToGlobal(viewPos);
ToolTip::instance()->show(globalPos, this);
}
void Widget::hoverLeaveEvent(QGraphicsSceneHoverEvent *e)
{
ToolTip::instance()->hide();
return QGraphicsItem::sceneEvent(event);
}
} // Plasma namespace

4
widgets/widget.h
View File

@ -304,8 +304,8 @@ protected:
void setSize(qreal width, qreal height);
void setSize(const QSizeF& size);
void managingLayoutChanged();
virtual void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
virtual bool sceneEvent(QEvent *event);
private:
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);