Qt-interest Archive, August 2007
Bug in QGraphicsView? Does not pass QMouseReleaseEvent properly
Message 1 in thread
I'm trying to get my QGraphicsView to pass a QMouseRelease event to
items on the scene, but without any luck. I'm doing it in the following
way:
void myView::mouseReleaseEvent(QMouseEvent *event)
{
...
qDebug() << "About to propogate event...";
QGraphicsView::MouseReleaseEvent(event); <--This should propogate
to the items right?
...
}
and in the items I do this...
void myGraphicsItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
qDebug() << "Success!";
...
}
However, this does not work. I get the initial message from the
graphics view, but nothing from the graphics item. The really weird
thing I discovered though is that if I pass the mouse release event as a
MousePressEvent, that will be passed to the graphics item fine! For
example:
void myView::mouseReleaseEvent(QMouseEvent *event)
{
...
qDebug() << "About to propogate event...";
QGraphicsView::MousePressEvent(event); <--wtf? Why does this work?
...
}
...and I can catch this fine in my graphics item by reimplementing
mousePressEvent:
void myGraphicsItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
qDebug() << "Success!";
...
}
I have no idea what's going on, I think this is a bug in QGraphicsView
or QGraphicsScene not propogating certain events correctly. Does anyone
else have a similar problem? Thanks,
-Chris Portka
--
[ signature omitted ]
Message 2 in thread
Hi Chris,
This works for me and I am able to capture mouse release events.
I assume that
QGraphicsView::MouseReleaseEvent(event);
is a typo and it is actually
QGraphicsView::mouseReleaseEvent(event);
Maybe if you can provide a comiplable code I can look into it.. :)
R's
Prateek
-----Original Message-----
From: Chris Portka [mailto:cportka@xxxxxxxxxxxxxxx]
Sent: Wednesday, August 15, 2007 5:42 AM
To: qt-interest@xxxxxxxxxxxxx
Subject: Bug in QGraphicsView? Does not pass QMouseReleaseEvent properly
I'm trying to get my QGraphicsView to pass a QMouseRelease event to
items on the scene, but without any luck. I'm doing it in the following
way:
void myView::mouseReleaseEvent(QMouseEvent *event) {
...
qDebug() << "About to propogate event...";
QGraphicsView::MouseReleaseEvent(event); <--This should propogate
to the items right?
...
}
and in the items I do this...
void myGraphicsItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
qDebug() << "Success!";
...
}
However, this does not work. I get the initial message from the
graphics view, but nothing from the graphics item. The really weird
thing I discovered though is that if I pass the mouse release event as a
MousePressEvent, that will be passed to the graphics item fine! For
example:
void myView::mouseReleaseEvent(QMouseEvent *event) {
...
qDebug() << "About to propogate event...";
QGraphicsView::MousePressEvent(event); <--wtf? Why does this work?
...
}
...and I can catch this fine in my graphics item by reimplementing
mousePressEvent:
void myGraphicsItem::mousePressEvent(QGraphicsSceneMouseEvent *event) {
qDebug() << "Success!";
...
}
I have no idea what's going on, I think this is a bug in QGraphicsView
or QGraphicsScene not propogating certain events correctly. Does anyone
else have a similar problem? Thanks, -Chris Portka
--
[ signature omitted ]
