如何将 Treeview 列 header 变成按钮？

Question

我试图通过向标题添加按钮来改进我的 GUI 的功能，但找不到关于此按钮的任何示例或信息。在这个例子中有没有办法让标题变成一个可点击的按钮？ Treeview 将从数据库中填充，因此，如果我能让按钮正常工作，这意味着我可以以比在“框”外设置更多按钮更好的方式来排序显示。

import tkinter as tk
from tkinter import ttk

screen = tk.Tk() 
screen.title('This One')
screen.geometry('890x400')
style = ttk.Style()
style.theme_use("clam")
screen.grid_rowconfigure(1, weight=1)
screen.grid_columnconfigure(0, weight=1)

cols = ('TOKEN', 'F-500', 'F-250', 'F-100', 'F-24', 'POS','NEG')
box = ttk.Treeview(screen, columns=cols, show='headings')
for col in cols:
    box.heading(col, text=col)
    box.grid(row=1, column=0, columnspan=2,sticky='nsew')


box.column("TOKEN", width=95)
box.column("F-500", width=85, anchor='e')
box.column("F-250", width=85, anchor='e')
box.column("F-100", width=85, anchor='e')
box.column("F-24", width=85, anchor='e')
box.column("POS", width=75, anchor='center')
box.column("NEG", width=75, anchor='center')



closeButton = tk.Button(screen, text="Close", width=15, command=exit).grid(row=10, column=0)

screen.mainloop()

Answer 1

Treeview 的标题已经是带有可选关键字 command 的按钮。要在 forloop 中使用它，您可以使用 lambda 和 annoynmous function.

import tkinter as tk
from tkinter import ttk

screen = tk.Tk() 
screen.title('This One')
screen.geometry('890x400')
style = ttk.Style()
style.theme_use("clam")
screen.grid_rowconfigure(1, weight=1)
screen.grid_columnconfigure(0, weight=1)

cols = ('TOKEN', 'F-500', 'F-250', 'F-100', 'F-24', 'POS','NEG')
box = ttk.Treeview(screen, columns=cols, show='headings')
for col in cols:
    if col == 'TOKEN':
        box.heading(col, text=col, command =lambda: print('token'))
    box.grid(row=1, column=0, columnspan=2,sticky='nsew')


box.column("TOKEN", width=95)
box.column("F-500", width=85, anchor='e')
box.column("F-250", width=85, anchor='e')
box.column("F-100", width=85, anchor='e')
box.column("F-24", width=85, anchor='e')
box.column("POS", width=75, anchor='center')
box.column("NEG", width=75, anchor='center')



closeButton = tk.Button(screen, text="Close", width=15, command=exit).grid(row=10, column=0)

screen.mainloop()

不使用 lambda：

def token():
    print('token')

cols = ('TOKEN', 'F-500', 'F-250', 'F-100', 'F-24', 'POS','NEG')
box = ttk.Treeview(screen, columns=cols, show='headings')
for col in cols:
    if col == 'TOKEN':
        box.heading(col, text=col, command =token)
    box.grid(row=1, column=0, columnspan=2,sticky='nsew')

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