ButtonTabComponent.java

/**
 * Copyright (C) IntelliBitz Technologies.,  Muthu Ramadoss
 * 168, Medavakkam Main Road, Madipakkam, Chennai 600091, Tamilnadu, India.
 * http://www.intellibitz.com
 * training@intellibitz.com
 * +91 44 2247 5106
 * http://groups.google.com/group/etoe
 * http://sted.sourceforge.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * STED, Copyright (C) 2007 IntelliBitz Technologies
 * STED comes with ABSOLUTELY NO WARRANTY;
 * This is free software, and you are welcome
 * to redistribute it under the GNU GPL conditions;
 *
 * Visit http://www.gnu.org/ for GPL License terms.
 */

/**
 * $Id:ButtonTabComponent.java 55 2007-05-19 05:55:34Z sushmu $
 * $HeadURL: svn+ssh://sushmu@svn.code.sf.net/p/sted/code/FontTransliterator/trunk/src/intellibitz/sted/widgets/ButtonTabComponent.java $
 */

package intellibitz.sted.widgets;

import javax.swing.AbstractButton;
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;
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 java.awt.event.MouseListener;

/**
 * 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 ButtonTabComponent
        extends JPanel
        implements ActionListener
{
    private JLabel tabTitle;
    protected ActionListener actionListener = null;

    public ButtonTabComponent(String title, final JTabbedPane pane)
    {
        //unset default FlowLayout' gaps
        super(new FlowLayout(FlowLayout.LEFT, 0, 0));
        if (pane == null)
        {
            throw new NullPointerException("TabbedPane is null");
        }
        setOpaque(false);

        //make JLabel read titles from JTabbedPane
        tabTitle = new JLabel(title);
        add(tabTitle);
        //add more space between the tabTitle and the button
        tabTitle.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 5));
        //tab button
        JButton tabButton = new TabButton();
        //Close the proper tab by clicking the button
        tabButton.addActionListener(this);
        add(tabButton);
        //add more space to the top of the component
        setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
    }

    public JLabel getTabTitle()
    {
        return tabTitle;
    }

    public void actionPerformed(ActionEvent e)
    {
        //TODO: HACKETY HACK! DOUBLE CHECK THIS IS SAFE..
        e.setSource(this);
        actionListener.actionPerformed(e);
    }

    public void addActionListener(ActionListener actionListener)
    {
        this.actionListener = actionListener;
    }

    private class TabButton
            extends JButton
    {
        public TabButton()
        {
            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(buttonMouseListener);
            setRolloverEnabled(true);
        }

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

        //paint the cross
        protected void paintComponent(Graphics g)
        {
            super.paintComponent(g);
            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);
            }
            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();
        }
    }

    private final static MouseListener buttonMouseListener = new MouseAdapter()
    {
        public void mouseEntered(MouseEvent e)
        {
            Component component = e.getComponent();
            if (component instanceof AbstractButton)
            {
                AbstractButton button = (AbstractButton) component;
                button.setBorderPainted(true);
            }
        }

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