python之tkinter treeview之拖放

我可以看到如何在树中剪切和粘贴节点，或者使用按钮或键绑定(bind)将它们上下移动。有没有办法在 TreeView 周围实现拖放节点？

请您参考如下方法:

这是一些处理左键单击和 shift-left-click 的工作示例代码:

import Tkinter as tk 
import ttk 
 
def bDown_Shift(event): 
    tv = event.widget 
    select = [tv.index(s) for s in tv.selection()] 
    select.append(tv.index(tv.identify_row(event.y))) 
    select.sort() 
    for i in range(select[0],select[-1]+1,1): 
        tv.selection_add(tv.get_children()[i]) 
 
def bDown(event): 
    tv = event.widget 
    if tv.identify_row(event.y) not in tv.selection(): 
        tv.selection_set(tv.identify_row(event.y))     
 
def bUp(event): 
    tv = event.widget 
    if tv.identify_row(event.y) in tv.selection(): 
        tv.selection_set(tv.identify_row(event.y))     
 
def bUp_Shift(event): 
    pass 
 
def bMove(event): 
    tv = event.widget 
    moveto = tv.index(tv.identify_row(event.y))     
    for s in tv.selection(): 
        tv.move(s, '', moveto) 
 
root = tk.Tk() 
 
tree = ttk.Treeview(columns=("col1","col2"),  
                    displaycolumns="col2",  
                    selectmode='none') 
 
# insert some items into the tree 
for i in range(10): 
    tree.insert('', 'end',iid='line%i' % i, text='line:%s' % i, values=('', i)) 
 
tree.grid() 
tree.bind("<ButtonPress-1>",bDown) 
tree.bind("<ButtonRelease-1>",bUp, add='+') 
tree.bind("<B1-Motion>",bMove, add='+') 
tree.bind("<Shift-ButtonPress-1>",bDown_Shift, add='+') 
tree.bind("<Shift-ButtonRelease-1>",bUp_Shift, add='+') 
 
root.mainloop()