The original TextBubbleBorder component featured rounded corners with no transparency, resulting in portions of the component lying outside the rectangle displaying the default panel color. The goal is to make those corners transparent, allowing the colors of components beneath to show through.
To achieve transparent rounded corners, a clipping process is employed. Here's how it works:
By integrating this clipping technique, the TextBubbleBorder component can now display transparent rounded corners, allowing the colors of underlying components to remain visible. Note that a clipping bug in the original code needs to be fixed before this solution can work correctly. The corrected code can be found in the accepted answer to the question "paintComponent() is drawing on other components."
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