Trying to paint custom background behind an element in Java Swing JTextPane with HTML

How to paint custom background behind an element in Java Swing JTextPane with HTML?

To paint a custom background behind an element in a Java Swing JTextPane with HTML, you'll need to extend the StyledDocument class and override the paint method. Here's a conceptual outline of how you can achieve this:

Steps: Set up JTextPane and StyledDocument: Create a JTextPane and associate it with a StyledDocument.

Define HTML Content: Add your HTML content to the JTextPane.

Custom Painter: Implement a custom ViewFactory and View to paint the background behind specific HTML elements.

Conceptual Code: While I can't provide the complete code here, I'll describe the necessary steps:

Create a Custom View:

Extend InlineView or BoxView to create a custom view that handles painting.

Override the paint method to add custom background painting.

Custom View Factory:

Implement a custom ViewFactory that returns instances of your custom view for specific elements.

Set the Custom View Factory:

Set the custom ViewFactory to your JTextPane to apply the custom painting.