Скачать или смотреть How to Dynamically Resize a Textbox in Pygame

Discover how to make a textbox dynamic in Pygame by resizing it as text is added or deleted. Learn to fix common issues with empty rectangles when deleting text!
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This video is based on the question https://stackoverflow.com/q/64344740/ asked by the user 'mr. bug' ( https://stackoverflow.com/u/12964308/ ) and on the answer https://stackoverflow.com/a/64346790/ provided by the user 'Rabbid76' ( https://stackoverflow.com/u/5577765/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Dynamically Resize a Textbox in Pygame

If you're working with Pygame and want to create a smooth user experience, adjusting the size of your textbox based on user input is key. For instance, you may want a textbox that automatically shrinks or expands as users type or delete characters. However, you might encounter a small problem when users delete text: instead of the box adjusting correctly, an empty rectangle appears where the letter was removed. But fear not, with just a little tweaking, you can easily resolve this issue!

The Problem

When users enter or delete text from a textbox in your Pygame application, you may find that the rectangle displaying the textbox doesn't resize as expected. Specifically, after deleting text, instead of adjusting the size of the rectangle dynamically, a gap can appear. This disrupts the visual aspect of your application and can be frustrating for users.

The primary issue arises from the sequence of operations: when you delete a character, the textbox won't always recalculate its width correctly until the next frame is drawn. This causes temporary visual artifacts that can detract from the user experience.

The Solution

To tackle this issue, we need to follow a few simple steps. Below, we'll walk through the modifications needed to make your textbox resize dynamically in real-time as characters are added or removed.

1. Adjust the Rectangle Class

First, we need to make adjustments inside the Rectangle class which manages how the textbox is both displayed and sized. Here's how we can implement it:

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

2. Update the Main Loop

Next, we must ensure that the screen is cleared on every frame rather than just during a delete event. This means updating your main loop as follows:

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

Summary

By making these adjustments in your Rectangle class and ensuring the main loop clears the screen every frame, you can prevent the empty rectangle bug from appearing. Your textbox should now grow and shrink seamlessly as users interact with it, resulting in a smooth, engaging experience.

With these changes in place, your Pygame application will not only be visually appealing, but it will also function intuitively. So, go ahead and implement these tweaks, and watch as your dynamic textbox shines!