diff options
| -rw-r--r-- | src/gui/graphicsview/qgraphicsitem.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp index 3138faa..5ba87ee 100644 --- a/src/gui/graphicsview/qgraphicsitem.cpp +++ b/src/gui/graphicsview/qgraphicsitem.cpp @@ -5940,13 +5940,21 @@ void QGraphicsItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) if ((item->flags() & ItemIsMovable) && !QGraphicsItemPrivate::movableAncestorIsSelected(item)) { QPointF currentParentPos; QPointF buttonDownParentPos; - if (item->d_ptr->itemIsUntransformable()) { + if (item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorIgnoresTransformations) { // Items whose ancestors ignore transformations need to // map screen coordinates to local coordinates, then map // those to the parent. QTransform viewToItemTransform = (item->deviceTransform(view->viewportTransform())).inverted(); currentParentPos = mapToParent(viewToItemTransform.map(QPointF(view->mapFromGlobal(event->screenPos())))); buttonDownParentPos = mapToParent(viewToItemTransform.map(QPointF(view->mapFromGlobal(event->buttonDownScreenPos(Qt::LeftButton))))); + } else if (item->flags() & ItemIgnoresTransformations) { + // Root items that ignore transformations need to + // calculate their diff by mapping viewport coordinates + // directly to parent coordinates. + QTransform viewToParentTransform = (item->transform().translate(item->d_ptr->pos.x(), item->d_ptr->pos.y())) + * (item->sceneTransform() * view->viewportTransform()).inverted(); + currentParentPos = viewToParentTransform.map(QPointF(view->mapFromGlobal(event->screenPos()))); + buttonDownParentPos = viewToParentTransform.map(QPointF(view->mapFromGlobal(event->buttonDownScreenPos(Qt::LeftButton)))); } else { // All other items simply map from the scene. currentParentPos = item->mapToParent(item->mapFromScene(event->scenePos())); |