🔒 Tkinter button : going through a video frame by frame but i have to press twice on it to work

[shell phoenix]

@hollow plume

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Hey @hollow plume!

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[viscid mist]

!paste

[shell phoenix]

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[viscid mist]

Can you put it in a pastebin so I can see it all at once?

[hollow plume]

Yes

https://www.pythonmorsels.com/p/39z3d/

[viscid mist]

So you need to press the buttons twice to get it to go to the previous or next frame?

[hollow plume]

Yes that's the issue

I want to only have to press it once

[viscid mist]

is it just the frames or does the play/pause have the same issue?

[hollow plume]

Just the frames pause button works fine

[viscid mist]

okay, so it's probably either an off-by-one error or needing cv2 to re-render. Let me dig into it a bit

[hollow plume]

Appreciate

[viscid mist]

do you have your code that initializes your video class? Mostly asking to speed up my testing

[hollow plume]

Of course let me send you the remaining

https://www.pythonmorsels.com/p/2tuzy/

https://www.pythonmorsels.com/p/2jz3p/

[viscid mist]

@hollow plume Do you have the Controller code? Just missing that bit to the get the initialization correct

[hollow plume]

Forgot about it

https://www.pythonmorsels.com/p/2cpct/

[viscid mist]

@hollow plume I'm not getting the behavior you're describing. I can press it once and it'll change frames. What OS are you on?

[hollow plume]

Windows 11

[viscid mist]

Hmmm, I'm on Win10. But the changing frames is working just fine with one button press

[hollow plume]

Damn

While we're at it how can i make such a messagebox ? Tkinter messagebox doesn't work

An exit dialog

[viscid mist]

Your exit dialog works for me

or do you mean when you try to "X" out of it instead of through the menu?

[hollow plume]

Yes through the X

[viscid mist]

You need specifically this under Application:

class Application(tk.Tk):
    def __init__(self):
        ...  #all of your code
        self.protocol("WM_DELETE_WINDOW", self.on_closing)

    def on_closing(self):
        if messagebox.askokcancel("Quit", "Do you want to quit?"):
            self.destroy()

It's a bit finnicky but you need that base tk.Tk instance to bind a message box function to the WM_DELETE_WINDOW event

[hollow plume]

Thanks

[hollow plume]

Is there any way to customize the buttons in tk.messagebox.askyesnocancel ?

[shell phoenix]

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