timeline_widget.py 文件源码

def mousePressEvent(self, mouse_event):
        modifiers = QtGui.QApplication.keyboardModifiers()
        self.setDragMode(
            QtGui.QGraphicsView.ScrollHandDrag
            if modifiers == QtCore.Qt.AltModifier
            else QtGui.QGraphicsView.NoDrag
        )
        self.setInteractive(not modifiers == QtCore.Qt.AltModifier)
        super(CompositionView, self).mousePressEvent(mouse_event)