Tkinter on Linux: tk.geometry(f"{d}x{d}") fails when maxsize() is set #92996
Comments
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Can you try to post here a minimal reproducible example of the code that is leading to your issue? |
AlexWaygood
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the
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'''Scale the square window with the mouse wheel. For Linux.'''
import tkinter as tk
class ChessBoard(tk.Tk):
def __init__(self):
super().__init__()
self.minsize(250, 250)
# self.maxsize(1900, 1900) # Uncomment for bug.
self.resizable(width=False, height=False)
self.canvas = tk.Canvas(self)
self.canvas.bind_all("<Button-4>", self.window_size_up)
self.canvas.bind_all("<Button-5>", self.window_size_down)
def window_size_up(self, event):
width = self.winfo_width()
width_window = width + 20
self.geometry(f'{width_window}x{width_window}')
print(width_window)
print(f'geometry: {self.geometry()}')
def window_size_down(self, event):
width = self.winfo_width()
width_window = width - 20
self.geometry(f'{width_window}x{width_window}')
print(width_window)
print(f'geometry: {self.geometry()}')
if__name__ == "__main__":
board = ChessBoard()
board.mainloop() |
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So simpler, but the result is the same. import tkinter as tk
def window_size_up(event):
width_window = root.winfo_width() + 20
root.geometry(f'{width_window}x{width_window}')
def window_size_down(event):
width_window = root.winfo_width() - 20
root.geometry(f'{width_window}x{width_window}')
root = tk.Tk()
root.minsize(250, 250)
# root.maxsize(1900, 1900) # Uncomment for bug.
root.resizable(width=False, height=False)
root.bind_all("<Button-4>", window_size_up)
root.bind_all("<Button-5>", window_size_down)
root.mainloop() |
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Hm. I could not replicate this on Windows: with that line included, as keys were pressed, my window shrank down to 250 or grew up to 1900. |
sweeneyde
changed the title
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I wrote in the first post that there is no such problem in Windows. It says in which OS and which version of Python. |
sweeneyde
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I still have Thonny with built-in python 3.7.9 in ubuntu. I just checked, it has the same bug. It looks like some kind of paleontological mistake from the time of the dinosaurs) |
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Your window manager is what decides how On linux, there's many different window managers (xfwm, macro, i3, xmonad, etc). So how exactly In other words, this is not a bug in tkinter, or in Tcl/Tk; it's how your window manager behaves (and maybe a bug in the window manager, depending on what its developers think). On my computer, with xfwm4 as the window manager, it works if I temporarily set |
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If it works in any of the Linux managers at all ... if 250 < width_window < 1900:
self.geometry(f'{width_window}x{width_window}')This is how it should work everywhere. |
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Does my suggest not work for you? Which window manager are you using on linux? To be clear, I'm suggesting: import tkinter
root = tkinter.Tk()
root.minsize(300, 300)
root.maxsize(500, 500)
root.resizable(False, False)
def bigger(e):
size = root.winfo_width() + 20
root.resizable(True, True)
root.geometry(f'{size}x{size}')
root.resizable(False, False)
def smaller(e):
size = root.winfo_width() - 20
root.resizable(True, True)
root.geometry(f'{size}x{size}')
root.resizable(False, False)
root.bind('<Button-4>', bigger)
root.bind('<Button-5>', smaller)
root.mainloop() |
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I wanted it to work fine on both Linux and Windows. Your version in Windows looks awful! The window flickers a lot and a lot of phantom tasks appear on the taskbar that do not have time to close quickly. import tkinter
def window_size(event):
if event.delta: # Windows
width_window = root.winfo_width() + event.delta // 10
else: # Linux
i = -20
if event.num == 4:
i = 20
width_window = root.winfo_width() + i
if 250 < width_window < 1000:
root.geometry(f'{width_window}x{width_window}')
root = tkinter.Tk()
root.resizable(False, False)
root.geometry('400x400')
root.bind_all("<MouseWheel>", window_size)
root.bind_all("<Button-4>", window_size)
root.bind_all("<Button-5>", window_size)
root.mainloop() |
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It's not unusual to write code like "if windows do this, else do that". It's especially common when you need to rely on something very platform-specific, such as how window managers behave :) I still don't think it's a bug in Tk. |
Issue with Tkinter (python 3.10.4) on Linux/Ubuntu 22.04.
self.minsize(250, 250)
self.maxsize(1900, 1900)
self.resizable(width=False, height=False)
I need to resize a window programmatically and when I limit the upper limit of the window, then self.geometry(f'{width_window}x{width_window}') doesn't save or resize the window. As soon as I comment out self.maxsize(1900, 1900), everything starts working fine. In Windows 10, it also works fine with the lower and upper limits.
Video: https://youtu.be/a1dKwnohMbo
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