我想渲染 2 個在串列中導航的按鈕（下一個和上一個）。而且我希望上一個和下一個按鈕處于活動狀態（可點擊），而不是分別到達串列的開始和結束時。我能怎么做 ？
uj5u.com熱心網友回復：
這是一個看似簡單的問題，實際上需要一些努力才能實作。
也許其他人可以找到更優雅的解決方案。
import tkinter as tk
data = ["A", "B", "C"]
def pickfrom(A, B):
end = listbox.index(tk.END) - 1
selection = listbox.curselection()[0]
listbox.select_clear(0, end)
if A == Next:
selection = selection 1
if selection >= end:
A.config(state = "disabled", text = "")
selection = end
B.config(state = "normal", text = "?")
else:
selection = selection - 1
if selection <= 0:
A.config(state = "disabled", text = "")
selection = 0
B.config(state = "normal", text = "?")
listbox.select_set(selection)
return listbox.get(selection)
def back():
print(pickfrom(Prev, Next))
def fore():
print(pickfrom(Next, Prev))
master = tk.Tk()
listdata = tk.StringVar(master, value = data)
listbox = tk.Listbox(
master, listvariable = listdata, activestyle = tk.NONE,
selectmode = "browse", takefocus = 0)
listbox.grid(row = 0, column = 0, columnspan = 2, sticky = tk.NSEW)
listbox.select_set(0)
Prev = tk.Button(master, text = "?", command = back)
Prev.grid(row = 1, column = 0, sticky = tk.EW)
Next = tk.Button(master, text = "?", command = fore)
Next.grid(row = 1, column = 1, sticky = tk.EW)
master.mainloop()
轉載請註明出處，本文鏈接：https://www.uj5u.com/caozuo/338396.html