Скачать или смотреть How to Customize Button Hover Colors in JavaFX

Learn how to add a hover property to JavaFX buttons directly from the controller instead of using CSS, allowing for dynamic color customization.
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This video is based on the question https://stackoverflow.com/q/62325715/ asked by the user 'pam' ( https://stackoverflow.com/u/6660557/ ) and on the answer https://stackoverflow.com/a/62326626/ provided by the user 'James_D' ( https://stackoverflow.com/u/2189127/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Customize Button Hover Colors in JavaFX

In the world of JavaFX, making your user interface engaging and interactive is crucial. One popular way to enhance interactivity is by tailoring the hover effects of buttons. Typically, hover properties are controlled through CSS, but what if you want to change these properties dynamically through your JavaFX controller? In this guide, we’ll explore how to accomplish this with ease.

Understanding the Problem

Suppose you have a FlowPane containing multiple toggle buttons. Each button needs a unique hover color that is not predefined in your CSS file. The goal is to modify the hover effect directly from your JavaFX controller. This gives you the freedom to create dynamic designs based on application logic or user interaction.

The Solution Overview

Here's a structured approach to implementing different hover colors for buttons without relying exclusively on CSS files:

Step 1: Define a Looked-Up Color in CSS

To start off, you will need to define a "looked-up color" in your CSS file. This allows JavaFX to recognize the color you want to assign to your buttons when hovered over.

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Step 2: Adjust for Default Behavior

If you want the buttons to exhibit default behavior without extra adjustments, you may be interested in setting the hover color according to the default hover base color:

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Step 3: Accessing and Modifying Colors in the Controller

Now that we have our CSS in place, let's move to your JavaFX controller. Here’s how to set the hover colors dynamically for your buttons:

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Step 4: Setting Up the FXML and Application Class

Finally, you will need to ensure that your FXML files and application launcher are correctly set up:

Main.fxml:

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App.java:

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Bonus: Inline CSS in FXML

If you prefer a quicker method, you can also define the hover colors directly in the FXML:

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Conclusion

By following these simple steps, you can effectively manage your JavaFX button hover colors directly from your controller rather than being confined to pre-defined styles in the CSS file. This dynamic approach provides flexibility and enhances user interaction, making your application more appealing and user-friendly.

Take this knowledge and apply it to your projects to enhance the visual aspects of your JavaFX applications!