pyqt 拖曳qtreeview项到PlotWidget

qdesigner中qtreeview设定

继承pyqtgraph的PlotWidget

重载拖曳的几个函数，需要注意mime类型，QTreeView drag的数据类型是application/x-standarditemmodeldatalist，Pyqt默认提供的几个高级helper函数不够用。

class MyPlotWidget(pg.PlotWidget):
    '''
    拖曳事件
    '''
    def init(self, parent=None):
        super().init(parent)
        self.setAcceptDrops(True) 

    def dragMoveEvent(self, event):
        src=event.source()
        if src and src!=self:
            event.setDropAction(Qt.MoveAction)

    def dragEnterEvent(self, event):
        #改指示
        if event.mimeData().hasFormat('application/x-qstandarditemmodeldatalist'):
            event.acceptProposedAction()
        else:
            event.ignore()

    def dropEvent(self, event):
        data = event.mimeData()
        source_item = QStandardItemModel()
        source_item.dropMimeData(data, Qt.CopyAction,0,0,QModelIndex())
        print(source_item.item(0, 0).text()) 

拖曳结果