MButtonTabComponent.java

package net.bull.javamelody.swing;

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.plaf.basic.BasicButtonUI;

/**
 * Component to be used as tabComponent.
 * Contains a JLabel to show the text and
 * a JButton to close the tab it belongs to
 */
public class MButtonTabComponent extends JPanel {
	@SuppressWarnings("all")
	static final ButtonMouseListener BUTTON_MOUSE_LISTENER = new ButtonMouseListener();

	private static final long serialVersionUID = 1L;

	static class ButtonMouseListener extends MouseAdapter {
		@Override
		public void mouseEntered(MouseEvent e) {
			final Component component = e.getComponent();
			if (component instanceof JButton) {
				final JButton button = (JButton) component;
				button.setBorderPainted(true);
			}
		}

		@Override
		public void mouseExited(MouseEvent e) {
			final Component component = e.getComponent();
			if (component instanceof JButton) {
				final JButton button = (JButton) component;
				button.setBorderPainted(false);
			}
		}
	}

	private final JTabbedPane pane;

	/**
	 * Constructor.
	 * @param pane JTabbedPane
	 */
	public MButtonTabComponent(final JTabbedPane pane) {
		//unset default FlowLayout' gaps
		super(new FlowLayout(FlowLayout.LEFT, 0, 0));
		if (pane == null) {
			throw new IllegalArgumentException("TabbedPane is null");
		}
		this.pane = pane;
		setOpaque(false);

		//make JLabel read titles from JTabbedPane
		final JLabel label = new JLabel() {
			private static final long serialVersionUID = 1L;

			@Override
			public String getText() {
				final int i = pane.indexOfTabComponent(MButtonTabComponent.this);
				if (i != -1) {
					return pane.getTitleAt(i);
				}
				return null;
			}
		};

		add(label);
		//add more space between the label and the button
		label.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 5));
		//tab button
		final JButton button = new TabButton();
		add(button);
		//add more space to the top of the component
		setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
	}

	private class TabButton extends JButton implements ActionListener {
		private static final long serialVersionUID = 1L;

		/**
		 * Constructor.
		 */
		public TabButton() {
			super();
			final int size = 17;
			setPreferredSize(new Dimension(size, size));
			//			setToolTipText("close this tab");
			//Make the button looks the same for all Laf's
			setUI(new BasicButtonUI());
			//Make it transparent
			setContentAreaFilled(false);
			//No need to be focusable
			setFocusable(false);
			setBorder(BorderFactory.createEtchedBorder());
			setBorderPainted(false);
			//Making nice rollover effect
			//we use the same listener for all buttons
			addMouseListener(BUTTON_MOUSE_LISTENER);
			setRolloverEnabled(true);
			//Close the proper tab by clicking the button
			addActionListener(this);
		}

		@Override
		public void actionPerformed(ActionEvent e) {
			final int i = getTabbedPane().indexOfTabComponent(MButtonTabComponent.this);
			if (i != -1) {
				getTabbedPane().remove(i);
			}
		}

		//we don't want to update UI for this button
		@Override
		public void updateUI() {
			// RAS
		}

		//paint the cross
		@Override
		protected void paintComponent(Graphics g) {
			super.paintComponent(g);
			final Graphics2D g2 = (Graphics2D) g.create();
			//shift the image for pressed buttons
			if (getModel().isPressed()) {
				g2.translate(1, 1);
			}
			g2.setStroke(new BasicStroke(2));
			g2.setColor(Color.BLACK);
			if (getModel().isRollover()) {
				g2.setColor(Color.MAGENTA);
			}
			final int delta = 6;
			g2.drawLine(delta, delta, getWidth() - delta - 1, getHeight() - delta - 1);
			g2.drawLine(getWidth() - delta - 1, delta, delta, getHeight() - delta - 1);
			g2.dispose();
		}
	}

	JTabbedPane getTabbedPane() {
		return pane;
	}
}