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Learn how to fix the common issue of different buttons flashing in Kivy's RecycleView with a clear solution and code examples.
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This video is based on the question https://stackoverflow.com/q/65670125/ asked by the user 'ixzor' ( https://stackoverflow.com/u/14969674/ ) and on the answer https://stackoverflow.com/a/65675234/ provided by the user 'John Anderson' ( https://stackoverflow.com/u/7254633/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the Button Flashing Issue in Kivy's RecycleView

Have you found yourself wrestling with the Kivy RecycleView and encountering an odd issue where clicking one button causes a different button to flash? This problem can be quite disconcerting, especially when you believe your code is correct. Fear not! In this guide, we’ll shed light on this issue and provide a clear, structured solution. Let’s dive in!

Understanding the Problem

You may be using the Kivy framework and have set up a Screen with a RecycleView. The unexpected behavior occurs when clicking on buttons: instead of the clicked button performing its intended action seamlessly, you see another button flashing. This not only confuses users but can disrupt the expected functionality of your application.

Analyzing the Code

The original code provided for the Kupci_sve class has both Screen and RecycleView as its parent classes. This may be contributing to the button flashing issue. Let’s break down the code briefly:

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

In this snippet, every action performed on the buttons may not be functioning as intended due to the conflicting nature of extending both Screen and RecycleView.

A Better Approach

Modifying the Class Structure

To correct this, we can simplify the class structure by making Kupci_sve extend only Screen. You can then include an instance of RecycleView in the Kivy language file (KV). Here's how to structure it:

Updated Kivy Language Code

Replace your existing KV rule with the following:

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

Updating the Kupci_sve Class

Now, make the following adjustments in your Kupci_sve class:

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

Explanation of Changes

Here’s a breakdown of what’s happening with the changes:

Extend Only Screen: This removes any conflicts that may arise from extending multiple classes, especially between Screen and RecycleView.

Using IDs: By adding an ID to the RecycleView, we can easily reference it from within the Kupci_sve class.

Dynamic Button Functionality: The buttons now each call the butt_release method when pressed, allowing you to handle button events smoothly and trace which button was clicked by logging its index.

Conclusion

By restructuring your Kivy app to separate the Screen and RecycleView, you can mitigate the button flashing issue and provide a better user experience. Carefully testing your application after making these changes should yield a smoother interaction. If you encounter further issues or have additional questions, feel free to reach out. Happy coding!

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