def itemChange(self, change, value):
if change == QGraphicsItem.ItemSelectedHasChanged and self._resizable:
if isinstance(value, int):
self.enableHandle(value)
else:
self.enableHandle(value.toBool())
elif change == QGraphicsItem.ItemPositionChange:
previousPos = self.pos()
value = value if isinstance(value, QPointF) else value.toPointF()
# check possible collision with parent and siblings
if self.parentItem():
#leaf classes
parentItem = self.parentItem()
onSceneParentRect = parentItem.boundingRect()
mappedParentRect = parentItem.mapRectToItem(
parentItem, onSceneParentRect)
x = value.x()
if x < mappedParentRect.left(
) + NodeGraphicsItem.LEAFSIZE[0] / 2:
x = mappedParentRect.left(
) + NodeGraphicsItem.LEAFSIZE[0] / 2
elif x > mappedParentRect.right(
) - NodeGraphicsItem.LEAFSIZE[0] / 2:
x = mappedParentRect.right(
) - NodeGraphicsItem.LEAFSIZE[0] / 2
y = value.y()
if y < mappedParentRect.top(
) + NodeGraphicsItem.LEAFSIZE[1] / 2:
y = mappedParentRect.top(
) + NodeGraphicsItem.LEAFSIZE[1] / 2
elif y > mappedParentRect.bottom(
) - NodeGraphicsItem.LEAFSIZE[1] / 2:
y = mappedParentRect.bottom(
) - NodeGraphicsItem.LEAFSIZE[1] / 2
value = QPointF(x, y)
elif change == QGraphicsItem.ItemPositionHasChanged:
self.model.pos = value if isinstance(
value, QPointF) else value.toPointF()
return super(NodeGraphicsItem, self).itemChange(change, value)
