LibraryPanel.py 文件源码

def OnTreeBeginDrag(self, event):
        """
        Called when a drag is started in tree
        @param event: wx.TreeEvent
        """
        selected_item = event.GetItem()
        item_pydata = self.Tree.GetPyData(selected_item)

        # Item dragged is a block
        if item_pydata is not None and item_pydata["type"] == BLOCK:
            # Start a drag'n drop
            data = wx.TextDataObject(str(
                (self.Tree.GetItemText(selected_item),
                 item_pydata["block_type"],
                 "",
                 item_pydata["inputs"])))
            dragSource = wx.DropSource(self.Tree)
            dragSource.SetData(data)
            dragSource.DoDragDrop()