/*
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
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* 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
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package javademo.swing.tabbedpane;
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;
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;
/**
* 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 static final long serialVersionUID = 1L;
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()
{
private static final long serialVersionUID = 1L;
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
{
private static final long serialVersionUID = 1L;
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);
}
}
};
}