tkinter | Tkinter GUI for cool animations | Animation library

I know that menu.tk_popup() can be used to open a context menu at a certain coordinate, but don't know how to open a submenu out of it too, if that makes sense. This is the code I made:

I have created a GUI app in Python tkinter for analyzing data in my laboratory. There are a number of buttons, figures, and canvas widgets. It would be helpful to take a screenshot of the entire window ('root') using just a single button that saves the filename appropriately. Example using Mac's built-in "screenshot" app here.

Related questions here, here, and here, but none worked successfully. The final link was almost successful, however the image that is saved is my computer's desktop background. My computer is a Mac, MacOS Monterey 12.0.1.

'root' is the tkinter window because

I made a Fourier Series/Transform Tkinter app, and so far everything works as I want it to, except that I am having issues with the circles misaligning. Here is an image explaining my issue (the green and pink were added after the fact to better explain the issue):

I have narrowed down the problem to the start of the lines, as it seems that they end in the correct place, and the circles are in their correct places. The distance between the correct positions and the position where the lines start seems to grow, but is actually proportional to the speed of the circle rotating, as the circle rotates by larger amounts, thus going faster.

Here is the code:

I have a checkbutton:

The 3 example files executable are: main.py, page1.py and external_class.py. The main.py file is used to start the main GUI and the page1.py file contains the class in which I import another class from the external_class.py file.

The problem is that the External class of the external_class.py file is unable to execute an element of the Page1 class of the page1.py file. The element is obtained from the combobox present in the Page1 class of the page1.py file, so I don't want to rewrite the code from scratch in the External class of the external_class.py file, but I just want the External class to recognize the select_only_way element.

In the External class of the external_class.py file, I use select_only_way like this self.cursor.execute ('SELECT a, b FROM other WHERE a = ?', [Select_only_way]). The problem is right here, in the External class of the external_class.py file.

I get error in the External class of the external_class.py file.

Python 3.9 on Mac running OS 11.6.1. My application involves placing a plot on a frame inside my root window, and I'm struggling to get the plot to take up a larger portion of the window. I thought rcParams in matplotlib.pyplot would take care of this, but I must be overlooking something.

Here's what I have so far:

[Editing this question completely] Thank you , for those who helped in building the Periodic Table successfully . As I completed it , I tried to link it with another of my project E-Search , which acts like Google and fetches answers , except that it will fetch me the data of the Periodic Table .

But , I got a problem - not with the searching but with the layout . I'm trying to layout the x-scrollbar in my canvas which will display results regarding the search . However , it is not properly done . Can anyone please help ?

Below here is my code :

EDIT [resolved]

based on the answer from Thingamabobs below, the approach simply turns out to be making sure the elements you spawn are allocated to correct parents.

It is worthwhile to create a frame just to hold every scrollable element since you can't move widgets around between parents when using pack/place. So a common parents between all movable elements will give you the freedom to move them around, again just create a holder frame. See the answer and discussion below for more details.

EDIT2

Bryan's answer below has very good info and an alternate approach using just a canvas. The core concepts still stand the same.

original question begins here

So based on this answer by Bryan, I used this approach to spawn widgets on a scrollable frame (which is basically a Canvas wrapping a frame inside as we know cause Frames don't have scroll attributes).

The widgets in this case are just tk.Buttons which I spawn in a loop using lambda to preserve state. That aspect is completely fine.

Now everything works fine except when I spawn more elements (again just buttons), they seem to be cut off. and I can't seem to scroll down to see the remaining ones. I am only able to scroll upwards only to see empty space.

please see the video below to see what I mean (excuse my horrible color choices, this is for a quick demo)

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.

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.

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.

how i bind to mousewheel

Beginner programmer here currently trying to learn Tkinter for a school assignment. I have a GUI class that stores the Tkinter labels etc, the labels are innitiated like this: