This question already has answers here:
Why does Tkinter image not show up if created in a function?
(5 answers)
Closed 5 years ago.
I have the following code:
from tkinter import *
import os
from PIL import ImageTk, Image
#Python3 version of PIL is Pillow
class Scope:
def __init__(self, master):
self.master = master
f = Frame(root)
self.greet_button = Button(f, text="Back", command=self.back)
self.greet_button.pack(side= LEFT)
self.greet_button = Button(f, text="Detect", command=self.detect)
self.greet_button.pack(side= LEFT)
self.close_button = Button(f, text="Continue", command=master.quit)
self.close_button.pack(side=LEFT)
photo = PhotoImage(file='demo.gif')
cv = Label(master, image=photo)
cv.pack(side= BOTTOM)
f.pack()
def greet(self):
print("Previous image...")
root = Tk()
my_gui = Scope(root)
root.mainloop()
My first problem is that when I run this, all the buttons and the window show up, but there is no image. There is a square place holder indicating that the image should be in that box, but no image actually shows. I'm able to display the image if I just type the following:
root = Tk()
photo = PhotoImage(file='demo.gif')
label = Label(root, image=photo)
label.pack()
root.mainloop()
So, I know it's possible. But I don't know what I'm doing wrong with my GUI code. I've tried debugging this quite a bit and nothing seemed to work.
A second problem is, I am completely unable to display a jpg file in a GUI. I've tried using every tutorial and nothing quite does the trick. Ideally, I'd like to just be able to display a jpg image, if that's not possible, I'll settle for displaying a gif.
Your reference to photo gets destroyed / carbage collected by Python after the class is called, so, there is nothing the label could show.
In order to avoid this, you have to maintain a steady reference to it, i.e. by naming it self.photo:
from tkinter import *
import os
from PIL import ImageTk, Image
#Python3 version of PIL is Pillow
class Scope:
def __init__(self, master):
self.master = master
f = Frame(root)
self.greet_button = Button(f, text="Back") #, command=self.back)
self.greet_button.pack(side=LEFT)
self.greet_button = Button(f, text="Detect") #, command=self.detect)
self.greet_button.pack(side=LEFT)
self.close_button = Button(f, text="Continue", command=master.quit)
self.close_button.pack(side=LEFT)
self.photo = PhotoImage(file='demo.gif')
cv = Label(master, image=self.photo)
cv.pack(side=BOTTOM)
f.pack()
def greet(self):
print("Previous image...")
root = Tk()
my_gui = Scope(root)
root.mainloop()
PS: Your code snippet was not running properly because two functions were missing.
Related
I've created a Tkinter app to convert the mailing lists we use at my company. All the functionality seems to work fine I just can't get the logo image to work!
I have created an app without using a Class and it is exactly how I'd want it.
The way I'd want the app to look:
However, I can only get the converter to work with this version using a Class:
Current working version:
The code for the working version is below (the one without any logo), I've excluded all the excel conversion code as it's quite long.
import tkinter as tk
class Window(tk.Frame):
def __init__(self, master=None):
tk.Frame.__init__(self, master)
self.master = master
self.init_window()
def init_window(self):
self.master.title("SPB Mailing List Cleaner")
self.pack(fill='both', expand=1)
self.filepath = tk.StringVar()
convertButton = tk.Button(self, text='Convert',
command=self.convert, bg="#00a69d", fg="white", height="2", width="15")
convertButton.place(x=242, y=200)
filepathText = tk.Entry(self, textvariable=self.filepath)
filepathText.pack()
filepathText.place(x=237, y=250)
def convert(self):
pass # left out code
def show_file_browser(self):
self.filename = filedialog.askopenfilename()
return self.filename
def first_browser(self):
file = self.show_file_browser()
self.filepath.set(file)
form = tk.Tk()
form.geometry("600x300")
form.resizable(0, 0)
app = Window(form)
form.mainloop()
This is the code for the image in the first screenshot (the one with the logo) ('The way I'd want the app to look').
import tkinter as tk
from PIL import Image, ImageTk
from tkinter.filedialog import askopenfile
from tkinter import filedialog as fd
import os
root = tk.Tk()
canvas = tk.Canvas(root, width = 600, height = 300)
canvas.grid(columnspan=3, rowspan=3)
#logo
logo = Image.open('logo.png')
logo = ImageTk.PhotoImage(logo)
logo_label = tk.Label(image = logo)
logo_label.image = logo
logo_label.grid(column=1, row=0)
#instructions
instructions = tk.Label(root, text="Select an appropriate '.xlsx' file for cleaning.")
instructions.grid(columnspan=3, column=0, row=1)
def open_file():
browse_text.set("loading...")
file = askopenfile(initialdir=os.path.normpath("C://"), parent=root, mode='rb', title="Choose a file", filetypes=[("Excel files", ".xlsx .xls")])
if file:
print(file.name)
#browse button
browse_text = tk.StringVar()
browse_btn = tk.Button(root, textvariable=browse_text, command=lambda:open_file(), bg="#00a69d", fg="white", height="2", width="15")
browse_text.set("Select File")
browse_btn.grid(column=1, row=2)
canvas = tk.Canvas(root, width = 600, height = 150)
canvas.grid(columnspan=3)
root.mainloop()
The question is how do I get the logo to work with the version that doesn't have a logo, i.e make the image work within a class.
I would really appreciate any feedback/help on this. I had a look at some posts that describe a similar issue but I'm quite new to coding so can't wrap my head around it all.
Things you have to do:
load the image in class.
Currently Tkinter only supports , the GIF, PGM, PPM, and PNG file formats as of Tkinter 8.6
To support other file formats such as PNG,JPG, JPEG, or BMP, you can use an image library such as Pillow to convert them into the supported format.
image = Image.open('./assets/python.jpg')
python_image = ImageTk.PhotoImage(image)
self.label=Label(image=python_image)
The another solution is to use to make the image variable a class variable by adding self. so final thing would look like self.img_var_name=image.
Alternatively you can append the images in a list, or use
image = image)
The goals is to increase the refrence count of image variable.
See Why does Tkinter image not show up if created in a function? for more details.
I just had to put the image code inside the init_window function.
def init_window(self):
#logo
logo = Image.open('logo.png')
logo = ImageTk.PhotoImage(logo)
logo_label = tk.Label(image = logo)
logo_label.image = logo
logo_label.place(x=160, y=20)
#instructions
instructions = tk.Label(form, text="Select an appropriate '.xlsx' file for cleaning.")
instructions.place(x=180, y=280)
self.master.title("SPB Mailing List Cleaner")
self.pack(fill = 'both', expand = 1)
self.filepath = tk.StringVar()
convertButton = tk.Button(self, text = 'Convert',
command = self.convert, bg="#00a69d", fg="white", height="2", width="15")
convertButton.place(x = 242, y = 200)
This question already has answers here:
Why does Tkinter image not show up if created in a function?
(5 answers)
Closed 2 years ago.
I am trying to make this UI from a stimulus as part of an assessment for school. I tried to import the provided school logo and banner on the top frame of the page and put images on the canvas but have yet to achieve any results. When I run the code, the pictures won't load at all. The code that I was working with is as followed:
from tkinter import *
import random
import time
import sqlite3
from tkinter import simpledialog
from tkinter import messagebox
from tkcalendar import *
from tkinter import ttk
import math
from PIL import Image, ImageTk
import winsound
#-------------Frames setup--------------------------
class VendingApp(Tk):
def __init__(self):
Tk.__init__(self)
self._frame = None
self.switch_frame(Home)
def switch_frame(self, frame_class):
#Destroys current frame and replaces it with a new one.
new_frame = frame_class(self)
if self._frame is not None:
self._frame.destroy()
self._frame = new_frame
self._frame.pack()
####-----------------------Home page---------------------------
class Home(Frame):
def __init__(self, master):
Frame.__init__(self, master)
topFrame = Frame(self,width = 1024, height = 100, bd = 2, bg = "black")
topFrame.pack()
canvas_for_logo = Canvas(topFrame, height=100, width=100, bg = 'green') ##logo image
canvas_for_logo.grid(row=0, column=0, sticky='ne')
img_logo = Image.open("pic/sitelogo.png")
img_logo = img_logo.resize((40,40), Image.ANTIALIAS)
logo = ImageTk.PhotoImage(img_logo)
canvas_for_logo.create_image(0, 0, anchor=NW, image=logo)
canvas_for_banner = Canvas(topFrame, bg='red', height=100, width=924) #banner image
canvas_for_banner.grid(row=0, column=1, sticky='nw')
img_banner = Image.open("pic/banner.jpg")
img_banner = img_banner.resize((40,40), Image.ANTIALIAS)
banner = ImageTk.PhotoImage(img_banner)
canvas_for_banner.create_image(0, 0, anchor=NW, image=banner)
MidFrame = Frame(self,width = 1024, height = 628, bd = 2)
MidFrame.pack()
MidFrame.grid_propagate(False)
BottomFrame = Frame(self,width = 1024, height = 50, bd = 2, bg = "black")
BottomFrame.pack()
BottomFrame.grid_propagate(False)
if __name__ == "__main__":
root = VendingApp()
#Sets the size of the window
root.geometry("1024x768")
#Renames the TITLE of the window
root.title("Vending machine")
root.geometry("1024x768")
root.resizable(False, False)
root.mainloop()
I decided to make a separate file to test if the image would load without class, and it did. Codes are as followed:
from tkinter import ttk
from tkinter import*
import time
from PIL import Image, ImageTk
root = Tk()
canvas_for_logo = Canvas(root, height=100, width=100)
canvas_for_logo.pack()
img = Image.open("pic/sitelogo.png")
img = img.resize((105,105), Image.ANTIALIAS)
logo = ImageTk.PhotoImage(img)
canvas_for_logo.create_image(0, 0, anchor=NW, image=logo)
canvas_for_banner = Canvas(root, bg='red', height=100, width=924) #banner image
canvas_for_banner.pack()
img_banner = Image.open("pic/banner.jpg")
img_banner = img_banner.resize((924,100), Image.ANTIALIAS)
banner = ImageTk.PhotoImage(img_banner)
canvas_for_banner.create_image(0, 0, anchor=NW, image=banner)
root.mainloop()
Can someone please tell me what I did wrong? All replies are much appreciated. Thank you.
This is a typical Tkinter bug. I don't want to go into details cause I don't fully understand why it happens either, but it has something to do with the garbage collector and the fact that it doesn't consider the objects you have created for storing those images like being in use, so it deletes them; or something like that.
Luckily, it has an easy solution: you can either create an internal list variable, let say, self._images that stores each image you are using, something like:
self._images = list()
(...)
self._images.append(logo)
(...)
self._images.append(banner)
Or, you could assign to each canvas instance an attribute image (or img, it doesn't really matters) that stores the image instance it is going to carry. In your code, it will look similar to:
canvas_for_logo.image = logo
(...)
canvas_for_banner.image = banner
This way, you can avoid the garbage collector deleting what it shouldn't, cause now it acknowledges that this instances are being in use.
I am making a program where I need to at some point display an image onto a frame at the press of a button. I am using an object oriented approach but it won't display the image. If I do something like:
from tkinter import *
from PIL import Image, ImageTk
root = Tk()
pic = Image.open("image.jpg")
tkpic = ImageTk.PhotoImage(pic)
label = Label(root, image=tkpic)
label.pack()
root.mainloop()
that works fine. But if I create a frame and try to display the picture like this:
from tkinter import *
from PIL import Image, ImageTk
class picframe(Frame):
def __init__(self, parent):
Frame.__init__(self, parent)
button = Button(self, text="show", command=self.showpic)
button.pack()
def showpic(self):
pic = Image.open("image.jpg")
tkpic = ImageTk.PhotoImage(pic)
label = Label(self, image=tkpic)
label.pack()
root = Tk()
frame = picframe(root)
frame.pack()
root.mainloop()
When I press the button it expands the window as if it was trying to display the image but nothing shows up it just becomes a wider window. So what am I doing wrong?
Thank you in advance!
As the picture is created in a function the reference tkpic will be garbage collected when the function exits. You need to save a reference to the image:
def showpic(self):
pic = Image.open("image.jpg")
tkpic = ImageTk.PhotoImage(pic)
label = Label(self, image=tkpic)
label.image = tkpic # Save reference to image
label.pack()
Alternatively you can ensure the persistance of the image reference by making it an instance variable:
def showpic(self):
pic = Image.open("images/beer.png")
self.tkpic = ImageTk.PhotoImage(pic)
label = Label(self, image=self.tkpic)
label.pack()
I'm a beginner trying to use tkinter to create a GUI. I've adapted code from other sources for my own use.
At the moment I'm trying to display an image along with a button.
However, when running the code, only the image displays no matter where I move the button, the button isn't displayed.
Would be grateful for any help.
Additional functionality:
I'm looking to implement a function so that I can move the image around using coordinates, also a function that allows me to use .jpg instead of .png.
Thanks in advance!
Code:
from tkinter import *
from PIL import Image, ImageTk
class Window(Frame):
def __init__(self, master = None):
Frame.__init__(self, master)
self.master = master
self.init_window()
def init_window(self):
self.master.title("WindowName")
self.pack(fill = BOTH, expand = 1)
quitButton = Button(self, text = "quit", command=self.client_exit)
quitButton.place(x=400,y=400)
self.showImg()
def client_exit(self):
exit() # Or another function
def showImg(self):
self.grid(row=0)
self.columnconfigure(0,weight=1)
self.rowconfigure(0,weight=1)
self.original = Image.open('wire.png')
resized = self.original.resize((200, 200),Image.ANTIALIAS)
self.image = ImageTk.PhotoImage(resized)
self.display = Label(self, image = self.image)
self.display.grid(row=0)
root = Tk()
root.geometry("600x600")
app = Window(root)
root.mainloop()
This question concerns Python's Tkinter.
I first produced this GUI, a simple two-column set of rows in a Labelframe, with an icon on the right:
The above behaviour was correct and expected, based on this following code:
import tkinter as tk
import tkinter.ttk as ttk
from PIL import Image, ImageTk
root = tk.Tk()
icon_colours_fp = r"D:\Dropbox\coding\python\experiments\icon_component.gif"
icon_col = tk.PhotoImage(file=icon_colours_fp)
# icon_col = ImageTk.PhotoImage(Image.open(icon_colours_fp))
tk.Label(root, text="Past").grid(row=0, column=0)
tk.Label(root, text="Today").grid(row=1, column=0)
tk.Label(root, text="Future").grid(row=2, column=0)
_b = ttk.Button(root, image=icon_col)
_b['image'] =icon_col
_b.grid(row=0, column=1)
root.mainloop()
I then re-wrote the code as a class, hoping to produce something similar within a Labelframe:
import tkinter as tk
import tkinter.ttk as ttk
from PIL import Image, ImageTk
class Options(tk.Frame):
def __init__(self, parent):
super().__init__()
main_labelframe = ttk.LabelFrame(parent, text="Test Labelframe")
main_labelframe.pack(fill=tk.BOTH, expand=1)
frame_1 = tk.Frame(main_labelframe)
frame_1_sep = ttk.Separator(main_labelframe, orient=tk.VERTICAL)
frame_2 = tk.Frame(main_labelframe)
frame_1.pack(side=tk.LEFT)
frame_1_sep.pack(side=tk.LEFT, fill=tk.BOTH)
frame_2.pack(side=tk.LEFT)
tk.Label(frame_1, text="Past").grid(row=0, column=0)
tk.Label(frame_1, text="Today").grid(row=1)
tk.Label(frame_1, text="Future").grid(row=2)
icon_colours_fp = r"D:\Dropbox\coding\python\experiments\icon_component.gif"
icon_col = tk.PhotoImage(file=icon_colours_fp)
_b = ttk.Button(frame_2, image=icon_col)
_b['image'] = icon_col
_b.grid(row=0, column=0)
class Gui(tk.Tk):
def __init__(self):
super().__init__()
options = Options(self)
options.pack()
gui = Gui()
gui.mainloop()
The code then failed, in two respects:
The icon fails to appear.
The ttk Button becomes misaligned. (It appears in the centre, whereas by the grid, it should appear at the top.)
The failed code appears as follows:
I have experimented: among others, I changed the geometry manager to .pack(), and changed the parent of ttk.Button, but without success. Would appreciate some pointers as to where I've gone wrong, especially as to the disappearing icon.
You didn't keep a reference to the image. Easiest way here is to change:
icon_col = tk.PhotoImage(file=icon_colours_fp)
b = ttk.Button(frame_2, image=icon_col)
_b['image'] = icon_col
To:
self.icon_col = tk.PhotoImage(file=icon_colours_fp)
b = ttk.Button(frame_2, image=self.icon_col)