如何在python中使用tkinter中的图像更新标签？

Question

我有一个带有几个选项的下拉菜单和一个带有图像的标签.

我想根据从下拉菜单中选择的选项更改图像,但我无法弄明白.

示例代码:

from Tkinter import*
import Tkinter as tk

def image():
    list1=['im1.gif','im2.gif']
    studDropDown['menu'].delete(0, "end")
    for string in list1:
        studDropDown['menu'].add_command(label=string,command=lambda value=string:studFiles.set(value))


app=Tk()
app.title("Example")
app.geometry('500x200+200+200')
app.configure(background='black')
app.resizable(0,0)

button1=Button(app,text='Press me',command=image)
button1.pack()


studFiles = StringVar()
studFiles.set('Image')
files =["Please Wait"]
studDropDown = OptionMenu(app, studFiles, *files)
studDropDown.config(font=("Times",16,"italic"))
studDropDown["menu"].config(font=("Times",16,"italic"))
studDropDown.pack()


photo =PhotoImage(file='im.gif')
label = Label(app,image=photo)

label.image = photo # keep a reference!
label.pack()

app.mainloop()

甚至使用标签来显示图像也是不合适的.

有任何想法吗 ？

Answer 1

这是一个基于您提供的代码的简单示例:

from Tkinter import *

def change_image(*args):
    # Change image of label accordingly
    label.config(image=photos[int(studFiles.get())])

app = Tk()
app.title("Example")
app.geometry('500x200+200+200')
app.configure(background='black')
app.resizable(0,0)

studFiles = StringVar()
studFiles.set('Image')
files =['0', '1'] # Number is corresponding list index
studDropDown = OptionMenu(app, studFiles, *files)
studDropDown.config(font=("Times", 16, "italic"))
studDropDown["menu"].config(font=("Times", 16, "italic"))
studDropDown.pack()

studFiles.trace("w", change_image)

# List of photoimages for each image
photos =(PhotoImage(file='im.gif'), PhotoImage(file='im2.gif'))
label = Label(app,image=photos[0])
label.pack()

app.mainloop()

你必须为PhotoImage你想要的每个图形制作一个列表/元组.您还必须追踪您的StringVar,因此您知道该值何时发生了OptionMenu变化.然后,您所要做的就是使用方法设置标签的图像config.