SelectableGraphicView.py 文件源码

def keyPressEvent(self, event: QKeyEvent):
        if event.key() == Qt.Key_Shift:
            self.shift_mode = True

            if self.hold_shift_to_drag:
                self.setCursor(Qt.OpenHandCursor)
            else:
                self.unsetCursor()
                self.grab_start = None

        super().keyPressEvent(event)