ClosableTabbedPane.java
// @formatter:off
/*******************************************************************************
*
* This file is part of JMad.
*
* Copyright (c) 2008-2011, CERN. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
// @formatter:on
package cern.accsoft.steering.util.gui.panels;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.Icon;
import javax.swing.JTabbedPane;
/**
* A JTabbedPane which has a close ('X') icon on each tab. To add a tab, use the method addTab(String, Component) To
* have an extra icon on each tab (e.g. like in JBuilder, showing the file type) use the method addTab(String,
* Component, Icon). Only clicking the 'X' closes the tab.
*/
public class ClosableTabbedPane extends JTabbedPane implements MouseListener {
private static final long serialVersionUID = 1L;
public ClosableTabbedPane() {
super();
addMouseListener(this);
}
public void addTab(String title, Component component) {
this.addTab(title, component, null);
}
public void addTab(String title, Component component, Icon extraIcon) {
super.addTab(title, new CloseTabIcon(extraIcon), component);
}
public void mouseClicked(MouseEvent e) {
int tabNumber = getUI().tabForCoordinate(this, e.getX(), e.getY());
if (tabNumber < 0)
return;
Rectangle rect = ((CloseTabIcon) getIconAt(tabNumber)).getBounds();
if (rect.contains(e.getX(), e.getY())) {
// the tab is being closed
this.removeTabAt(tabNumber);
}
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
}
/**
* The class which generates the 'X' icon for the tabs. The constructor accepts an icon which is extra to the 'X' icon,
* so you can have tabs like in JBuilder. This value is null if no extra icon is required.
*/
class CloseTabIcon implements Icon {
private int x_pos;
private int y_pos;
private int width;
private int height;
private Icon fileIcon;
public CloseTabIcon(Icon fileIcon) {
this.fileIcon = fileIcon;
width = 16;
height = 16;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
this.x_pos = x;
this.y_pos = y;
Color col = g.getColor();
g.setColor(Color.black);
int y_p = y + 2;
g.drawLine(x + 1, y_p, x + 12, y_p);
g.drawLine(x + 1, y_p + 13, x + 12, y_p + 13);
g.drawLine(x, y_p + 1, x, y_p + 12);
g.drawLine(x + 13, y_p + 1, x + 13, y_p + 12);
g.drawLine(x + 3, y_p + 3, x + 10, y_p + 10);
g.drawLine(x + 3, y_p + 4, x + 9, y_p + 10);
g.drawLine(x + 4, y_p + 3, x + 10, y_p + 9);
g.drawLine(x + 10, y_p + 3, x + 3, y_p + 10);
g.drawLine(x + 10, y_p + 4, x + 4, y_p + 10);
g.drawLine(x + 9, y_p + 3, x + 3, y_p + 9);
g.setColor(col);
if (fileIcon != null) {
fileIcon.paintIcon(c, g, x + width, y_p);
}
}
public int getIconWidth() {
return width + (fileIcon != null ? fileIcon.getIconWidth() : 0);
}
public int getIconHeight() {
return height;
}
public Rectangle getBounds() {
return new Rectangle(x_pos, y_pos, width, height);
}
}