tkinter scrollbar only scrolls downwards and cuts off content-CodePudding

EDIT [resolved]

based on the

In the video, there are more elements below template47 but I can not scroll to them. I can scroll upwards but it's just lonely up there. All the names are actually buttons with zero bd and HLthickness.

what I have tried

To begin, my first instinct was to attach a ttk.scrollbar to the canvas frame, which I did but observed the exact same behavior.

Then I tried to see if i could use .moveTo('1.0') to scroll down to last entry and then since upward scrolling works already, shouldn't have an issue. But this didn't do anything either. Still the elements were cut off, and it obviously messed up upward scrolling too.

I don't think I can use pack/grid geoManagers since as the answer by bryan i linked to above suggests, using place with its in_ arg is the preferred way. If it is possible otherwise, let me know though.

my use case in a nutshell

as depicted in the answer linked above, I also have two frames, and I'm using the on_click callback function to switch parents (a lot like in example code in answer). Turned out place was the best bet to achieve this. and it is, all of that aspect is working well. It's just the scroll thingy which doesn't work.

some code (dare i say MCVE)

how i bind to mousewheel

    def _bound_to_mousewheel(self, event):
        self.canvas.bind_all("<MouseWheel>", self._on_mousewheel)

    def _unbound_to_mousewheel(self, event):
        self.canvas.unbind_all("<MouseWheel>")

    def _on_mousewheel(self, event):
        self.canvas.yview_scroll(int(-1 * (event.delta / 120)), "units")

creating the window

self.canvas.create_window((5, 6), window=self.scrolled_frame, anchor="w")

ad of course the widgets inside

        for f in self.fav_templates:
            btn = tk.Button(self.root, text='text', command=lambda te=f: self._on_click(te))

            btn.place(in_=self.ft_frame, x=20, y=p)

So

I'm sure above snippets would give idea of what I've done. If someone needs me to create a complete MCVE they can run, happy to do that, lemme know.

What did I miss in the setup? any ideas or suggestion are welcome.

Thank You :)

CodePudding user response：

The main issue is that you are using place and with place you will be the allmighty over the widget, means there will be no