Python 如何更新 Tkinter Label 小部件的图像？
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How to update the image of a Tkinter Label widget?
提问by skeggse
I would like to be able to swap out an image on a Tkinter label, but I'm not sure how to do it, except for replacing the widget itself.
我希望能够换出 Tkinter 标签上的图像，但我不知道该怎么做，除了更换小部件本身。
Currently, I can display an image like so:
目前，我可以像这样显示图像：
import Tkinter as tk
import ImageTk
root = tk.Tk()
img = ImageTk.PhotoImage(Image.open(path))
panel = tk.Label(root, image = img)
panel.pack(side = "bottom", fill = "both", expand = "yes")
root.mainloop()
However, when the user hits, say the ENTERkey, I'd like to change the image.
但是，当用户点击时，说ENTER键，我想更改图像。
import Tkinter as tk
import ImageTk
root = tk.Tk()
img = ImageTk.PhotoImage(Image.open(path))
panel = tk.Label(root, image = img)
panel.pack(side = "bottom", fill = "both", expand = "yes")
def callback(e):
# change image
root.bind("<Return>", callback)
root.mainloop()
Is this possible?
这可能吗？
采纳答案by skeggse
The method label.configuredoes work in panel.configure(image=img).
该方法label.configure在panel.configure(image=img).
What I forgot to do was include the panel.image=img, to prevent garbage collection from deleting the image.
我忘记做的是包含panel.image=img, 以防止垃圾收集删除图像。
The following is the new version:
以下是新版本：
import Tkinter as tk
import ImageTk
root = tk.Tk()
img = ImageTk.PhotoImage(Image.open(path))
panel = tk.Label(root, image=img)
panel.pack(side="bottom", fill="both", expand="yes")
def callback(e):
img2 = ImageTk.PhotoImage(Image.open(path2))
panel.configure(image=img2)
panel.image = img2
root.bind("<Return>", callback)
root.mainloop()
The original code works because the image is stored in the global variable img.
原始代码有效，因为图像存储在全局变量中img。
回答by Daniel Santos
Another option to do it.
这样做的另一种选择。
Using object-oriented programming and with an interactive interface to update the image.
使用面向对象的编程和交互式界面来更新图像。
from Tkinter import *
import tkFileDialog
from tkFileDialog import askdirectory
from PIL import Image
class GUI(Frame):
def __init__(self, master=None):
Frame.__init__(self, master)
w,h = 650, 650
master.minsize(width=w, height=h)
master.maxsize(width=w, height=h)
self.pack()
self.file = Button(self, text='Browse', command=self.choose)
self.choose = Label(self, text="Choose file").pack()
self.image = PhotoImage(file='cualitativa.gif')
self.label = Label(image=self.image)
self.file.pack()
self.label.pack()
def choose(self):
ifile = tkFileDialog.askopenfile(parent=self,mode='rb',title='Choose a file')
path = ifile.name
self.image2 = PhotoImage(file=path)
self.label.configure(image=self.image2)
self.label.image=self.image2
root = Tk()
app = GUI(master=root)
app.mainloop()
root.destroy()
Replace 'cualitativa.jpg' for the default image you want to use.
将 'culitativa.jpg' 替换为您要使用的默认图像。
