I am working on Tkinter (Python3.12) on Windows 10. My issue is that when using postscript on a Canvas on which a window was drawn, only black rectangles appear instead.
After some tests, the background of the frame given in the create_window method does appear, but there are black rectangles instead of the children widgets.
For a simple reproductible example, I ran the code from this question : Tkinter Canvas Postscript not capturing Window elements outside of screen frame both on Windows 10 and on Debian 12.
Here is a simplified code snippet which saves the canvas in outfile.ps :
from tkinter import Tk, Canvas, Frame, Text, Label
class Example(Tk):
def __init__(self):
"""Example canvas with a circle and a frame and label"""
super().__init__()
cv = Canvas(self)
cv.config(background="white", width=120, height=120)
cv.pack()
text = "Hello Word!"
window = Frame(cv)
Label(window, text=text).pack(padx=2, pady=2)
pos = (60, 60)
cv.create_window(pos, window=window)
bbox = (pos[0]-40, pos[1]-40, pos[0]+50, pos[1]+50)
cv.create_oval(bbox, width=3, outline="green")
self.update()
cv.update()
self.update_idletasks()
x1, y1, x2, y2 = cv.bbox("all")
cv.postscript(file="outfile.ps", colormode="color", x=x1, y=y1, width=x2, height=y2)
print("Wrote file outfile.ps...")
root = Example()
root.mainloop()
Running this on Windows gives the following image : link here, but it works on Debian 12.
Is this a Windows issue with no workaround ?
Upgrading to Python 3.13 solved the issue, so the explanation is probably a version incompatibility with Windows 10 and Python 3.12 for this particular case.
