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Learn how to keep your text displayed in Pygame when a button is clicked. A step-by-step guide on fixing text visibility using Pygame.
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How to Update Text on Button Click in Pygame

If you're diving into game development using Pygame, you might come across challenges that can be tricky to solve. One common issue is making text appear on the screen when a button is clicked. Beginners often find that the text flashes on screen for just a single frame and then disappears, leaving them puzzled. In this post, we’ll explore how to resolve this issue so that the text stays visible after the button is clicked.

Understanding the Problem

In your Pygame application, the task is to display a random string from a list when a button is clicked. Initially, your implemented code lets users click a button, but the generated text shows up only briefly before disappearing. This flickering effect happens because the rendering of the text isn't handled in the right part of the code's structure.

Solution Breakdown

Let's improve your Pygame code step-by-step to ensure that the text remains visible after the button is clicked.

Step 1: Initialize Text Variables Correctly

Instead of creating your text variable to render the random choice before your main application loop starts, it’s better to initialize it with None. This way, you have control over when the text is generated and displayed.

Update your variable as follows:

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

Step 2: Generating Text on Button Click

Next, modify the part of your loop that checks for mouse clicks. When the button is clicked, choose a random string from your list and render it only at that moment. Here’s how you do this:

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

Step 3: Render Text on the Screen

To make sure that the text appears on the screen continuously, check if bFont is set to a valid value during each iteration of your main loop. If it is, draw it on the screen:

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

Final Code Example

Here’s the complete example incorporating all the mentioned changes:

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

Conclusion

With these modifications, your Pygame application should now smoothly render text without it flashing off the screen after just one frame. This will not only improve the user experience but also make your application feel more responsive and interactive. Happy coding!