python--Tkinter02

曾经终败给现在 2022-05-28 13:06 105阅读 0赞

1、ListBox

import tkinter as tk
    window = tk.Tk()
    window.title("The window")
    window.geometry("400x600")
    
    #创建变量
    var1 = tk.StringVar()
    l = tk.Label(window,bg='red',width=10,textvariable=var1)
    l.pack()
    
    def print_selection():
        #获取当前选中的文本内容
        value = lb.get(lb.curselection())
        #为label的值设为value
        var1.set(value)
        
    b1 = tk.Button(window,text='print selection',width=15,
                   height=2,command=print_selection).pack()
    
    var2 = tk.StringVar()
    #为变量设置值，此处用元组
    var2.set((11,12,13,14))
    #创建Listbox,将var2的值赋给listbox
    lb = tk.Listbox(window,listvariable=var2)
    list_item = [1,2,3,4]
    for item in list_item:
        #从列表控件最后一个为止加入值
        lb.insert('end',item)
    #在第一个位置加入'first'字符
    lb.insert(1,'first')
    #在第二个位置加入'second'字符
    lb.insert(2,'second')
    #删除第二个位置的字符
    lb.delete(2)
    lb.pack()
    window.mainloop()

![20180406142845944][]

2、radiobutton

#Radiobutton
    import tkinter as tk
    window = tk.Tk()
    window.title("The window")
    window.geometry("400x300")
    
    var = tk.StringVar()
    
    #l = tk.Label(window,bg='red',width=30,text='empty').pack()
    l = tk.Label(window,bg='red',width=30,text='empty')
    l.pack()
    
    def print_selection():
         l.config(text='you have selected ' + var.get())
        
    
    #创建选项部件，当我们鼠标选中了其中一个选项，把value的值‘A'放到变量var中，再赋值给varilable
    r1 = tk.Radiobutton(window,text='Option A',variable=var,value='A',command=print_selection)
    r1.pack()
    r2 = tk.Radiobutton(window,text='Option B',variable=var,value='B',command=print_selection)
    r2.pack()
    r3 = tk.Radiobutton(window,text='Option C',variable=var,value='C',command=print_selection)
    r3.pack()
    
    window.mainloop()

![20180406144315884][]

注：l = tk.Label(window,bg='red',width=30,text='empty').pack() 写成这样子，由于print\_selection函数再调用label标签时，由于label已经"定位"了，无法再找到label标签，因此会报错。

错误如下：

![2018040614461710][]

[20180406142845944]: /images/20220528/c2f371812777438889f0c3a52161230d.png
[20180406144315884]: /images/20220528/cc668763f7ef4230bdf60ce92f0d3d41.png
[2018040614461710]: /images/20220528/917987e8746942538c43c20f09ef57ff.png