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from pyqtgraph.Qt import QtGui, QtCore, USE_PYSIDE
if not USE_PYSIDE:
import sip
from .GraphicsItem import GraphicsItem
__all__ = ['GraphicsObject']
class GraphicsObject(GraphicsItem, QtGui.QGraphicsObject):
"""
**Bases:** :class:`GraphicsItem <pyqtgraph.graphicsItems.GraphicsItem>`, :class:`QtGui.QGraphicsObject`
Extension of QGraphicsObject with some useful methods (provided by :class:`GraphicsItem <pyqtgraph.graphicsItems.GraphicsItem>`)
"""
_qtBaseClass = QtGui.QGraphicsObject
def __init__(self, *args):
self.__inform_view_on_changes = True
QtGui.QGraphicsObject.__init__(self, *args)
self.setFlag(self.ItemSendsGeometryChanges)
GraphicsItem.__init__(self)
def itemChange(self, change, value):
ret = QtGui.QGraphicsObject.itemChange(self, change, value)
if change in [self.ItemParentHasChanged, self.ItemSceneHasChanged]:
self.parentChanged()
if self.__inform_view_on_changes and change in [self.ItemPositionHasChanged, self.ItemTransformHasChanged]:
self.informViewBoundsChanged()
## workaround for pyqt bug:
## http://www.riverbankcomputing.com/pipermail/pyqt/2012-August/031818.html
if not USE_PYSIDE and change == self.ItemParentChange and isinstance(ret, QtGui.QGraphicsItem):
ret = sip.cast(ret, QtGui.QGraphicsItem)
return ret
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