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