QtEmbedded 4.70 QGraphicsItemGroup Problem

**QbelcorT** · 18th November 2010, 03:59

Hi,
I am transitioning from Qt4.41 -> Qt4.70. This is working without problem on Qt4.4.1. I am having a problem with QT4.70 QGraphicsItemGroup. If I add my QGraphicsItem to the scene my mouse events are propagated to the QGraphicsItem. However if the QGraphicsItem is added to a QGraphicsItemGroup the mouse event doesn't get sent to the QGraphicsItem. The mouse event occurs in the QGraphicsView, but the item is not getting it. The item/group is visible. All non-grouped items seem to work OK.
Thank you for any suggestions.

**QbelcorT** · 25th November 2010, 09:37

Hi,
I solved this problem by re-implementing QGraphicsItem::sceneEvent(QEvent *event). Now the mousepress/release events are occurring in the custom item.

Qt Code:

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bool MyCustomItem::sceneEvent(QEvent *event)
{
   switch (event->type()) {
 
	case QEvent::GraphicsSceneMousePress:
		mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
		break;
 
	case QEvent::GraphicsSceneMouseRelease:
		mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
		break;
    default:
		return (QGraphicsItem::sceneEvent(event));
    }
	return true;
}

bool MyCustomItem::sceneEvent(QEvent *event)
{
   switch (event->type()) {

	case QEvent::GraphicsSceneMousePress:
		mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
		break;

	case QEvent::GraphicsSceneMouseRelease:
		mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
		break;
    default:
		return (QGraphicsItem::sceneEvent(event));
    }
	return true;
}

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