Creating a Canvas Button in Tkinter’s Toplevel Window

Learn how to create a button using `canvas.create_window` in a Tkinter Toplevel window, troubleshooting a common issue in the process.
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This video is based on the question https://stackoverflow.com/q/66080709/ asked by the user 'Adam Leszczyński' ( https://stackoverflow.com/u/15159564/ ) and on the answer https://stackoverflow.com/a/66081423/ provided by the user 'martineau' ( https://stackoverflow.com/u/355230/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Create a Button Using Canvas in toplevel() Tkinter

When working with Tkinter, a GUI toolkit for Python, you may encounter scenarios where you need to create buttons within a Toplevel window. This allows for better organization and interaction within your application. In this guide, we will address a common issue when using canvas.create_window to place buttons on a Canvas in a Toplevel window. We'll provide a detailed solution to ensure both the "Start" and "Back" buttons function correctly.

The Problem

You might want to navigate between windows in your Tkinter application. In doing so, you have a main window with a "Start" button, which triggers the creation of a Toplevel window containing a "Back" button. The issue that arises is that the "Back" button does not appear when the Toplevel window is created. Here's a look at the code you might be using:

[[See Video to Reveal this Text or Code Snippet]]

In this code, the "Back" button is not displayed due to the order of creation of the Canvas and the button itself.

The Solution

To resolve this issue, you merely need to adjust the order in which you create the Canvas and the Back button. Here’s how to do it:

Step-by-Step Code Adjustment

Create the Canvas First: Initialize the Canvas object before creating the button, ensuring there's an area for the button to be displayed.

Create the Button After: Once the Canvas is in place, create the button and place it on the canvas.

Here’s the corrected code snippet:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of Code Changes

Canvas First: By calling canvas_two = Canvas(top, ...) before the button, you're ensuring that there is a surface available to position the button within.

Button Creation: After the Canvas is packed and ready for use, the button is created and placed with canvas_two.create_window(...).

With this adjustment, your "Back" button should now appear correctly in your Toplevel window, allowing for smooth navigation back to the main window.

Conclusion

Creating buttons in a Tkinter Toplevel window using a Canvas can be straightforward once you grasp the order of operations. By ensuring you create the Canvas before the button, you can effectively solve the problems that arise with unresponsive UI elements.

Now you're all set! Go ahead and implement this in your Tkinter applications and enjoy a well-functioning GUI.

If you have any additional questions or run into further issues, feel free to leave a comment below!

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