Source code for pyqtgraph.graphicsItems.GraphicsObject

from ..Qt import QtGui, QtCore, USE_PYSIDE
if not USE_PYSIDE:
    import sip
from .GraphicsItem import GraphicsItem

__all__ = ['GraphicsObject']
[docs]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
[docs] 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() try: inform_view_on_change = self.__inform_view_on_changes except AttributeError: # It's possible that the attribute was already collected when the itemChange happened # (if it was triggered during the gc of the object). pass else: if inform_view_on_change 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