from Tkinter import *
root = Tk()
# Remove titlebar
root.overrideredirect(1)
canvas = Canvas(root, width =100,height=153)
logo=PhotoImage(file="a.png")
canvas.create_image(100, 100, image=logo)
root.mainloop()
All I get is a blank window of the wrong size in the wrong position.
My requirements:
Simplicity - just output a simple png file (I'll pass it as a parameter if I can get this to work.
No external programs.
No clicking on it
Ability to position it
Ability to destroy it
It will actually be a function called over and over to output selected png files at a specific location.
python2 or 3 - don't care. I ran this in python2
I know the file exists because when it doesn't, I get:
_tkinter.TclError: couldn't open "a.png": no such file or directory
I thought it would be easy to do this in python because the big program I got for my application is in python and I just want to make a few modes (like outputting images).
Tkinter, on a Mac, and maybe Windows, has problems with a png image. PIL/Pillow claims to support some specific types of PNG
https://pillow.readthedocs.io/en/5.1.x/h...s.html#png The simplest thing to do is convert to JPG or some other recognized format using ImageMagick or the Python wrapper = Pythonmagick.
Quote:It will actually be a function called over and over to output selected png files at a specific location
Read the text with the green background at
http://effbot.org/tkinterbook/photoimage.htm In your case, you might want to read all of the files into a list, which would keep a reference to them as long as the empty list is not also created in a function (=same problem).
I converted it to a jpg using gimp and got an error so I tried anothe jpg file that I have been using for a while. Here's what I got:
Error:
Traceback (most recent call last):
File "another_picture.py", line 7, in <module>
logo=PhotoImage(file="9636a.jpg")
File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 3374, in __init__
Image.__init__(self, 'photo', name, cnf, master, **kw)
File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 3328, in __init__
self.tk.call(('image', 'create', imgtype, name,) + options)
_tkinter.TclError: couldn't recognize data in image file "9636a.jpg"
(Apr-04-2019, 03:34 AM)woooee Wrote: [ -> ]This page referenced above, opens a jpeg and places it on a Label. Your code would be similar to place it on a Canvas https://effbot.org/tkinterbook/photoimage.htm
So here is the updated version. File exists as if I delete it, the program gives me a traceback showing it's missing. Like this, no errors but a blank canvas.
from Tkinter import *
from PIL import Image, ImageTk
root = Tk()
# Remove titlebar
root.overrideredirect(1)
canvas = Canvas(root, width =100,height=153)
image = Image.open("pngs/a.jpg")
logo = ImageTk.PhotoImage(image)
#logo=PhotoImage(file="pngs/a.jpg)
canvas.create_image(200, 200, image=logo) #Change 0, 0 to whichever coordinates you need
root.mainloop()If I only had the smarts to learn this stuff any more. Back in the days of wooden ships and iron men, all we had was FORTRAN.
Hi jpezz
You have to bind the tk-image to an object. In your case for instance to the object
root. The
canvas needs a layout membership for which i choosed
pack. For the
canvas.create_image add for instance the option anchor='nw'. So the x/y-coordinates relate to the upper left corner of the image. In your case the image would be place outsite of the visuable surface of the canvas:
from Tkinter import *
from PIL import Image, ImageTk
root = Tk()
# Remove titlebar
#root.overrideredirect(1)
canvas = Canvas(root, width =200,height=200)
canvas.pack()
image = Image.open("pngs/a.jpg")
#logo=PhotoImage(file="pngs/a.jpg)
root.logo = ImageTk.PhotoImage(image)
canvas.create_image(10, 10, image=root.logo, anchor='nw')
root.mainloop()wuf :-)
(Apr-05-2019, 01:19 PM)wuf Wrote: [ -> ]Hi jpezz
You have to bind the tk-image to an object. In your case for instance to the object root. The canvas needs a layout membership for which i choosed pack. For the canvas.create_image add for instance the option anchor='nw'. So the x/y-coordinates relate to the upper left corner of the image. In your case the image would be place outsite of the visuable surface of the canvas:
from Tkinter import *
from PIL import Image, ImageTk
root = Tk()
# Remove titlebar
#root.overrideredirect(1)
canvas = Canvas(root, width =200,height=200)
canvas.pack()
image = Image.open("pngs/a.jpg")
#logo=PhotoImage(file="pngs/a.jpg)
root.logo = ImageTk.PhotoImage(image)
canvas.create_image(10, 10, image=root.logo, anchor='nw')
root.mainloop()wuf :-)
I got it! I misunderstood the coordinates in the canvas.create_image statement. I thought it was the POSITION of the canvas in the window. Instead I was locating the image outside the canvas. However, I would like to position the canvas in a specific location. I found nothing on that but did find something on Label so I tried this:
canvas.place(x=50,y=100)
but it doesn't work. How can I position the canvas itself on the screen?
Hi jpezz
You can't place a Canvas directly on the screen. It must be embedded on the main window. Here some different placements of an image in a tk-Application:
# -*- coding: utf-8 -*
try:
# Import Tkinter for Python 2.xx
import Tkinter as tk
except ImportError:
# Or import Tkinter for Python 3.xx
import tkinter as tk
from PIL import Image, ImageTk
MAIN_WIN_TITLE = "Image Placements"
MAIN_WIN_XPOS = 100
MAIN_WIN_YPOS = 100
MAIN_WIN_WIDTH = 800
MAIN_WIN_HEIGHT = 600
CANVAS_XPOS = 50
CANVAS_YPOS = 50
CANVAS_WIDTH = 400
CANVAS_HEIGHT = 400
CANVAS_BG = 'steelblue'
root = tk.Tk()
root.title(MAIN_WIN_TITLE)
# Placement of the main window
root.geometry("{}x{}+{}+{}".format(
MAIN_WIN_WIDTH, MAIN_WIN_HEIGHT, MAIN_WIN_XPOS, MAIN_WIN_YPOS))
# Get the .jpg image and convert it to tkinter format
image = Image.open("pngs/a.jpg")
root.test_image = ImageTk.PhotoImage(image)
# Placement of a canvas on the main window
canvas = tk.Canvas(root, bg=CANVAS_BG)
canvas.place(x=CANVAS_XPOS, y=CANVAS_YPOS, width=CANVAS_WIDTH,
height=CANVAS_HEIGHT)
# Place the image as canvas image object directly on the canvas by
# useage of coordinates
canvas.create_image(15, 25, image=root.test_image, anchor='nw')
# Create a label widget containing the image and place it in a canvas
# window object on the canvas
image_label = tk.Label(canvas, text="Image Label placed\non canvas",
compound='bottom', image=root.test_image)
canvas.create_window(200, 200, anchor='nw', window=image_label)
# Create a label widget containig the image and place it directly on
# the main window
image_label = tk.Label(root, text="Image Label placed\non main window",
compound='bottom', image=root.test_image)
image_label.place(x=500, y=50)
root.mainloop()wuf :-)
(Apr-05-2019, 04:26 PM)wuf Wrote: [ -> ]Hi jpezz
You can't place a Canvas directly on the screen. It must be embedded on the main window. Here some different placements of an image in a tk-Application:
[/python]wuf :-)
Great! Wonderful explanation of the choices and I can easily change the numbers so that canvas and move to different positions Since I have used the label widget before (but don't yet fully understand it), I'd prefer not to have to have a canvas. I played around with your program and I see how I can move things around.
My objective would be to put out a single letter in the Label but it would be big enough for multiple letters. Then I would, in a function, update the label to add an additional letter. I tried just simply creating the label then updating it in the mainloop so this:
# Create a label widget containig the image and place it directly on
# the main window
image_label = tk.Label(root, text="Image Label placed\non main window",
compound='bottom', image=root.test_image)
image_label.place(x=500, y=50)looks like this now:
# Create a label widget containig the image and place it directly on
# the main window
image_label = tk.Label(root, text="Image Label placed\non main window",
compound='bottom', image=root.test_image)
image_label.place(x=500, y=50)
image2 = Image.open("pngs/b.png")
root.test_image = ImageTk.PhotoImage(image2)
image_label.place(x=600, y=50)
image_label.config (root,image=root.test_image)and I get this error.
Quote:Traceback (most recent call last):
File "his_original.py", line 58, in <module>
root.place(x=600, y=50)
File "/usr/lib/python3.6/tkinter/__init__.py", line 2101, in __getattr__
return getattr(self.tk, attr)
AttributeError: '_tkinter.tkapp' object has no attribute 'place'
Fumbling my way through python one error at a time.
Hi jpezz
Make following alteration:
image2 = Image.open("pngs/b.png")
root.test_image2 = ImageTk.PhotoImage(image2)
image_label.place(x=600, y=50)
image_label.config(image=root.test_image2)wuf :-)