[Solved] QGraphicsObject with child groups mousePressEvent not firing
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After lots of googling and testing I am stuck. I have a derived QGraphicsObject that contains a number of QGraphicsGroup's and QGraphicsItem's and for the life of me I am unable to get the mousePressEvent to fire for my object, interestingly enough my objects boundRect() does get called when I click the graphics view.
The constructor of my QGraphicsItem looks something like this:
@
MyItem::MyItem(QGraphicsItem * parent) : QGraphicsObject(parent)
{
setFlags(QGraphicsItem::ItemIsSelectable);
setHandlesChildEvents(true);_root = new QGraphicsItemGroup(); _root->setParentItem(this); QGraphicsRectItem * item = new QGraphicsRectItem(); item->setRect(0, 0, 100, 100); _root->addToGroup(item);
}
@I continue to add many more items but for readability lets assume I just have a rectangle that is 100x100. Next I override the boundRect() function:
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QRectF MyItem::boundingRect() const
{
return QRectF(-50, -50, 50, 50);
}
@My object is being painted correctly but I simply do not get mouse events. I am using the default QGraphicsScene and QGraphicsView. I have tried all the combinations of setting setHandlesChildEvents on myself and _root, but that does not seem to make a difference. Any ideas?
Thanks!
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Could you show your declaration of your mouse event handler?
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Definitely!
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void MyItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
{
if( event->button()==Qt::LeftButton )
{
// do something
}
}
@ -
Ok, this is strange. I created a test app thinking I would post it here to demonstrate the problem however in my test app it works great so clearly it is something I am doing wrong. I'll post my solution once I find one here.
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Found my problem. I was adding MyItem objects to a group and then adding that group to my scene, turns out if I set setHandlesChildEvents to false on my group then it allows MyItem to get the mouse events as normal.
Hope this is helpful.