diff options
Diffstat (limited to 'src/gui/graphicsview/qgraphicsitem.cpp')
-rw-r--r-- | src/gui/graphicsview/qgraphicsitem.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp index 3eef396..58f04f0 100644 --- a/src/gui/graphicsview/qgraphicsitem.cpp +++ b/src/gui/graphicsview/qgraphicsitem.cpp @@ -5788,6 +5788,20 @@ QVariant QGraphicsItem::inputMethodQuery(Qt::InputMethodQuery query) const return QVariant(); } +void QGraphicsItem::grabGesture(const Qt::GestureType &type) +{ + d_ptr->gestures.insert(type); + if (d_ptr->scene) + d_ptr->scene->d_func()->grabGesture(this, type); +} + +void QGraphicsItem::releaseGesture(const Qt::GestureType &type) +{ + d_ptr->gestures.remove(type); + if (d_ptr->scene) + d_ptr->scene->d_func()->releaseGesture(this, type); +} + /*! This virtual function is called by QGraphicsItem to notify custom items that some part of the item's state changes. By reimplementing this @@ -5812,6 +5826,20 @@ QVariant QGraphicsItem::inputMethodQuery(Qt::InputMethodQuery query) const QVariant QGraphicsItem::itemChange(GraphicsItemChange change, const QVariant &value) { Q_UNUSED(change); + if (change == QGraphicsItem::ItemSceneChange) { + if (!qVariantValue<QGraphicsScene*>(value)) { + // the item has been removed from a scene, unsubscribe gestures. + Q_ASSERT(d_ptr->scene); + foreach(const Qt::GestureType &gesture, d_ptr->gestures) + d_ptr->scene->d_func()->releaseGesture(this, gesture); + } + } else if (change == QGraphicsItem::ItemSceneHasChanged) { + if (QGraphicsScene *scene = qVariantValue<QGraphicsScene*>(value)) { + // item has been added to the scene + foreach(const Qt::GestureType &gesture, d_ptr->gestures) + scene->d_func()->grabGesture(this, gesture); + } + } return value; } |