Tkinter

Question

tree = ttk.Treeview(root, selectmode="browse")
tree.pack()

当用户在已经 select 编辑了最后一个项目时按下向下箭头键，我需要它 select 顶部项目，向上箭头也是如此。谢谢！

Answer 1

您可以 bind() 函数在 TreeView 中键入 Down (Up) 这将检查您是否在最后（第一）行并跳转到第一行（最后）行。它必须移动选择、移动焦点、滚动 window 和阻止事件，因此 TreeView 不会使用此键移动到下（上）行。

import tkinter as tk
from tkinter import ttk

def jump_to_first(event):
    last = tree.get_children()[-1]
    if tree.focus() == last:
        first = tree.get_children()[0]
        tree.selection_set(first) # move selection
        tree.focus(first) # move focus
        tree.see(first) # scroll to show it
        return "break" # don't send event to TreeView

def jump_to_last(event):
    first = tree.get_children()[0]
    if tree.focus() == first:
        last = tree.get_children()[-1]
        tree.selection_set(last) # move selection
        tree.focus(last) # move focus
        tree.see(last) # scroll to show it
        return "break" # don't send event to TreeView

root = tk.Tk()

tree = ttk.Treeview(root, selectmode="browse")
tree.pack()

for x in range(1, 21):
    print(tree.insert('', 'end', text=str(x)))

tree.bind('<Down>', jump_to_first)
tree.bind('<Up>', jump_to_last)

root.mainloop()

Tkinter - 如何在按下底部时转到 Treeview 的顶部，反之亦然？

Tkinter - How to go to the top of a Treeview when pressing down at the bottom, and vice versa?

python

treeview

python-3.x