Source code for pyqtgraph.graphicsItems.GraphicsWidget

from ..Qt import QtCore, QtGui, QtWidgets
from .GraphicsItem import GraphicsItem

__all__ = ['GraphicsWidget']

[docs] class GraphicsWidget(GraphicsItem, QtWidgets.QGraphicsWidget): _qtBaseClass = QtWidgets.QGraphicsWidget
[docs] def __init__(self, *args, **kwargs): """ **Bases:** :class:`GraphicsItem <pyqtgraph.GraphicsItem>`, :class:`QtWidgets.QGraphicsWidget` Extends QGraphicsWidget with several helpful methods and workarounds for PyQt bugs. Most of the extra functionality is inherited from :class:`GraphicsItem <pyqtgraph.GraphicsItem>`. """ QtWidgets.QGraphicsWidget.__init__(self, *args, **kwargs) GraphicsItem.__init__(self) # cache bounding rect and geometry self._boundingRectCache = self._previousGeometry = None self._painterPathCache = None self.geometryChanged.connect(self._resetCachedProperties)
# done by GraphicsItem init # GraphicsScene.registerObject(self) # workaround for pyqt bug in GraphicsScene.items() # Removed due to # def itemChange(self, change, value): # # BEWARE: Calling QGraphicsWidget.itemChange can lead to crashing! # # ret = QtWidgets.QGraphicsWidget.itemChange(self, change, value) # segv occurs here # # The default behavior is just to return the value argument, so we'll do that # # without calling the original method. # ret = value # if change in [self.ItemParentHasChanged, self.ItemSceneHasChanged]: # self._updateView() # return ret def _resetCachedProperties(self): self._boundingRectCache = self._previousGeometry = None self._painterPathCache = None def setFixedHeight(self, h): self.setMaximumHeight(h) self.setMinimumHeight(h) def setFixedWidth(self, h): self.setMaximumWidth(h) self.setMinimumWidth(h) def height(self): return self.geometry().height() def width(self): return self.geometry().width() def boundingRect(self): geometry = self.geometry() if geometry != self._previousGeometry: self._painterPathCache = None br = self.mapRectFromParent(geometry).normalized() self._boundingRectCache = br self._previousGeometry = geometry else: br = self._boundingRectCache return QtCore.QRectF(br) def shape(self): p = self._painterPathCache if p is None: self._painterPathCache = p = QtGui.QPainterPath() p.addRect(self.boundingRect()) return p