VAqua.src.org.violetlib.aqua.AquaBasicPopupMenuWrapper Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of vaqua Show documentation

An improved native Swing look and feel for macOS

The newest version!

/*
 * Copyright (c) 2015-2018 Alan Snyder.
 * All rights reserved.
 *
 * You may not use, copy or modify this file, except in compliance with the license agreement. For details see
 * accompanying license terms.
 */

package org.violetlib.aqua;

import java.awt.*;
import javax.swing.*;
import javax.swing.border.Border;

/**
 * The container that wraps a component to support rounded corners. Used for contextual menus, pop up and pull down
 * menus, but not for editable combo box menus.
 */
public class AquaBasicPopupMenuWrapper extends JPanel {

    public AquaBasicPopupMenuWrapper(JComponent c, Border border) {
        super(null);

        setLayout(new BorderLayout());
        add(c);
        setBorder(border);
        setOpaque(false);
    }

    @Override
    public void paintComponent(Graphics g) {

        // The following code supports pop up menus with rounded corners. The key requirement is that the popup must
        // not paint near the corners.

        Border border = getBorder();
        if (border instanceof BackgroundPainter) {
            BackgroundPainter p = (BackgroundPainter) border;
            Rectangle bounds = getBounds();
            p.paintBackground(this, g, bounds.x, bounds.y, bounds.width, bounds.height);
        }

        super.paintComponent(g);
    }
}