英文:
How can I display an image file with tkinter?
问题
我想创建一个基于Tkinter的Python程序，允许我打开一个图像文件并在Label小部件中显示它。但当我运行程序并点击按钮调用OpenFile()函数时，它不会显示图像。如何在Label小部件中显示图像？
谢谢！
我的程序看起来像这样：
import tkinter
from tkinter import *
from tkinter import filedialog
from tkinter import messagebox
from PIL import Image, ImageTk
window = Tk() # 应用程序的主窗口
menu_bar = Menu(window) # 应用程序菜单栏
def OpenFile():
"打开图像文件"
try:
file = filedialog.askopenfilename(initialdir="E:", filetypes=[("图像文件", (".png"))])
image = Image.open(file)
img = ImageTk.PhotoImage(image)
#img.resize(50, 50)
display = tkinter.Label(window)
display.image = img
display.pack()
return file
except FileNotFoundError:
messagebox.showerror("文件未找到", "未找到所选文件。")
file_menu = Menu(menu_bar, tearoff=0) # 添加一个"文件"菜单到菜单栏
file_menu.add_command(label="打开文件...", command=OpenFile)
file_menu.add_command(label="退出...", command=window.destroy)
menu_bar.add_cascade(label="文件", menu=file_menu)
window.config(menu=menu_bar)
window.mainloop()
英文:
I want to do a Tkinter-based python program which would allow me to open an image file and to display it in a Label widget. But when I run the program and I click the button to call the OpenFile() function, it does not display the image. How can I display the image in the Label widget ?
Thank you !
My program looks like this :
import tkinter
from tkinter import *
from tkinter import filedialog
from tkinter import messagebox
from PIL import Image, ImageTk
window = Tk() # App main window
menu_bar = Menu(window) # App menu bar
def OpenFile():
"Open an image"
try:
file = filedialog.askopenfilename(initialdir= "E:", filetypes= [("Image file", (".png"))])
image = Image.open(file)
img = ImageTk.PhotoImage(image)
#img.resize(50, 50)
display = tkinter.Label(window)
display.image = img
display.pack()
return file
except FileNotFoundError:
messagebox.showerror("Unfound file", "The selected file was not found.")
file_menu = Menu(menu_bar, tearoff= 0) # Add a "File" menu to menu_bar
file_menu.add_command(label= "Open file...", command= OpenFile)
file_menu.add_command(label= "Quit...", command= window.destroy)
menu_bar.add_cascade(label= "File", menu= file_menu)
window.config(menu= menu_bar)
window.mainloop()
答案1
得分: 1
img 存储包含您的图像的对象（将 filepath 替换为 file）
然后我们创建一个带有该图像的标签。
英文:
Try this:
img = tk.PhotoImage(file="filepath")
tk.Label(window, image=img).pack()
img stores an object containing your image (replace filepath with file)
Then we create a lebel with the image.
> Let me know if you need help!
答案2
得分: 1
你忘记给tkinter.Label的image选项赋值：
display = tkinter.Label(window, image=img) # 需要设置image选项
我建议创建标签一次，然后在函数内部更新其image选项：
...
def OpenFile():
"打开一个图像"
try:
file = filedialog.askopenfilename(initialdir="", filetypes=[("图像文件", (".png"))])
if file:
img = ImageTk.PhotoImage(file=file)
#img.resize(50, 50)
#display = tkinter.Label(window, image=img)
display.config(image=img)
display.image = img
return file
except FileNotFoundError:
messagebox.showerror("文件未找到", "未找到所选文件。")
display = tkinter.Label(window) # 创建标签一次
display.pack()
...
英文:
You forget to assign the image option of tkinter.Label:
display = tkinter.Label(window, image=img) # need to set the image option
I would suggest to create the label once and update its image option inside the function instead:
...
def OpenFile():
"Open an image"
try:
file = filedialog.askopenfilename(initialdir= "", filetypes= [("Image file", (".png"))])
if file:
img = ImageTk.PhotoImage(file=file)
#img.resize(50, 50)
#display = tkinter.Label(window, image=img)
display.config(image=img)
display.image = img
return file
except FileNotFoundError:
messagebox.showerror("Unfound file", "The selected file was not found.")
display = tkinter.Label(window) # create label once
display.pack()
...
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