Tkinter（六）：Checkbutton 復選按鈕

 

 效果：

選擇不同的復選框，會顯示選中的內容在頂部label上

import tkinter as tk

# 定義窗口
window = tk.Tk()
window.title('my window')  # 窗口title
window.geometry('350x300')  # 窗口尺寸

# 定義Label
l = tk.Label(window, bg="yellow", width=20, text='you have selected None')
l.pack()


def print_selection():
    if (var1.get() == 1 and var2.get() == 0):
        l.config(text='I love only Python')
    elif (var1.get() == 0 and var2.get() == 1):
        l.config(text='I love only C++')
    elif (var1.get() == 1 and var2.get() == 1):
        l.config(text='I love both')
    else:
        l.config(text='I do not love either')


var1 = tk.IntVar()
var2 = tk.IntVar()
'''
state狀態：active, disabled,normal
onvalue：復選按鈕選中時變量的值
offvalue：復選按鈕未選中時變量的值
variable：通過變量的值確定哪些復選按鈕被選中，每個復選按鈕使用不同的變量，復選按鈕之間相互獨立
'''
c1 = tk.Checkbutton(window, text='Python', variable=var1, onvalue=1, offvalue=0, command=print_selection)
c2 = tk.Checkbutton(window, text='C++', variable=var2, onvalue=1, offvalue=0, command=print_selection)

c1.pack()
c2.pack()

window.mainloop()

總結：

1.復選框被勾選上時，variable = var1 = onvalue =1

復選框沒有被勾上時，variable = var1 = offvalue =0

2.獲取值使用var1.get()

3.條件判斷語句，python2和python3中略有不同，python3中使用and or not

4.使用state參數可以表明復選框的狀態，參數有active,disabled,normal