GraphicsScene.py 文件源码

def __init__(self, clickRadius=2, moveDistance=5, parent=None):
        QtGui.QGraphicsScene.__init__(self, parent)
        self.setClickRadius(clickRadius)
        self.setMoveDistance(moveDistance)
        self.exportDirectory = None

        self.clickEvents = []
        self.dragButtons = []
        self.mouseGrabber = None
        self.dragItem = None
        self.lastDrag = None
        self.hoverItems = weakref.WeakKeyDictionary()
        self.lastHoverEvent = None
        self.minDragTime = 0.5  # drags shorter than 0.5 sec are interpreted as clicks

        self.contextMenu = [QtGui.QAction("Export...", self)]
        self.contextMenu[0].triggered.connect(self.showExportDialog)

        self.exportDialog = None