timeline.py 文件源码

def contextMenuEvent(self, event):
        menu = QtWidgets.QMenu()

        listOfLabelsAndFunctions = [
            ("interpolation type", self.changeInterpolationType),
            ("units per minute", self.changeTempoUnits),
            ("reference note", self.changeTempoReference),
            ]
        if not self.staticExportItem["positionInBlock"] == 0:
            listOfLabelsAndFunctions.append(("delete", lambda: api.removeTempoItem(self.staticExportItem["id"])))

        for text, function in listOfLabelsAndFunctions:
            if text == "separator":
                self.addSeparator()
            else:
                a = QtWidgets.QAction(text, menu)
                menu.addAction(a)
                a.triggered.connect(function)

        pos = QtGui.QCursor.pos()
        pos.setY(pos.y() + 5)
        self.ungrabMouse() #if we don't ungrab and the user clicks the context menu "away" by clicking in an empty area this will still get registered as mouseclick belonging to the current item
        menu.exec_(pos)