/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  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 Sun Microsystems nor 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. */ package components;import javax.swing.*;import javax.swing.*;import javax.swing.plaf.basic.BasicButtonUI;import java.awt.*;import java.awt.event.*;/** * 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 {    private final JTabbedPane pane;    public ButtonTabComponent(final JTabbedPane pane) {        //unset default FlowLayout' gaps        super(new FlowLayout(FlowLayout.LEFT, 0, 0));        if (pane == null) {            throw new NullPointerException("TabbedPane is null");        }        this.pane = pane;        setOpaque(false);                //make JLabel read titles from JTabbedPane        JLabel label = new JLabel() {            public String getText() {                int i = pane.indexOfTabComponent(ButtonTabComponent.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        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 {        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);            //Close the proper tab by clicking the button            addActionListener(this);        }        public void actionPerformed(ActionEvent e) {            int i = pane.indexOfTabComponent(ButtonTabComponent.this);            if (i != -1) {                pane.remove(i);            }        }        //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);            }        }    };}