Скачать или смотреть How to Configure a Button Linking to a Site Based on Radio Button Selection in Tkinter

Learn how to modify a Tkinter application to link a button to different websites, based on user-selected radio buttons.
---
This video is based on the question https://stackoverflow.com/q/64364758/ asked by the user 'IgneousFormation' ( https://stackoverflow.com/u/14383740/ ) and on the answer https://stackoverflow.com/a/64366979/ provided by the user 'Henry Yik' ( https://stackoverflow.com/u/9284423/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Configure a button that links to site depending on chosen radio button

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Configure a Button Linking to a Site Based on Radio Button Selection in Tkinter

Creating engaging user interfaces can sometimes be challenging, especially when trying to make components interactive and responsive to user choices. If you're working on a Tkinter application, you might want a button that directs users to different websites, depending on which radio button they select. In this guide, we’ll walk you through how to implement this functionality step by step.

The Problem

You might have created a button that links to a hard-coded URL, but now you want to change this behavior. Specifically, you want the button to open a different URL based on the user's selection from a group of radio buttons. The code provided gives an initial framework but needs adjustments to achieve this desired interactivity.

Here’s a snippet of your existing structure:

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

As seen, the button currently will always link to the second URL in your urls list. Let’s learn how to change this!

Solution Overview

To achieve the desired functionality where the button’s action depends on the selected radio button, you can replace the StringVar used to track the radio button selection with an IntVar. This way, you can directly index the urls list based on the selected radio button. Below, we will break down the steps required to implement this fix.

Step 1: Update the IntVar Declaration

Instead of using StringVar, initialize an IntVar to keep track of the user's selection numerically. This allows us to easily map the index of the selected button to the URL:

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

Step 2: Adjust Radiobutton Creation

Update your loop that creates the radio buttons. Use enumerate() to assign an index value to each radio button, which will correspond to the respective URL in your list:

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

In the above code, num serves as the index that each button corresponds to in the URLs list.

Step 3: Modify the Callback Function

Change the callback function so that it uses the value of ttl_var to retrieve the correct URL from the urls list. This way, the link opened will depend on the selected radio button:

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

Step 4: Update Button Binding

Finally, remove the earlier hard-coded URL in the button binding and use the updated callback function:

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

Complete Updated Code

Here’s how your complete updated code might look after including these changes:

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

Conclusion

By changing from StringVar to IntVar, we have effectively enabled the button to link to different websites based on the user's radio button selection. This simple modification improves user interactivity in your Tkinter application, making it more engaging.

Now that you understand the process, feel free to expand this concept further, perhaps by linking to more URLs or implementing additional UI features. Happy coding!