TabbedPane Sample 2
/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski
ISBN: 1-893115-78-X
Publisher: APress
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Polygon;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTabbedPane;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class TabbedPaneSample {
static Color colors[] = { Color.red, Color.orange, Color.yellow,
Color.green, Color.blue, Color.magenta };
static void add(JTabbedPane tabbedPane, String label) {
int count = tabbedPane.getTabCount();
JButton button = new JButton(label);
button.setBackground(colors[count]);
tabbedPane.addTab(label, new DiamondIcon(colors[count]), button, label);
}
public static void main(String args[]) {
String title = (args.length == 0 ? "Tabbed Pane Sample" : args[0]);
JFrame frame = new JFrame(title);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTabbedPane tabbedPane = new JTabbedPane();
String titles[] = { "General", "Security", "Content", "Connection",
"Programs", "Advanced" };
for (int i = 0, n = titles.length; i < n; i++) {
add(tabbedPane, titles[i]);
}
ChangeListener changeListener = new ChangeListener() {
public void stateChanged(ChangeEvent changeEvent) {
JTabbedPane sourceTabbedPane = (JTabbedPane) changeEvent
.getSource();
int index = sourceTabbedPane.getSelectedIndex();
System.out.println("Tab changed to: "
+ sourceTabbedPane.getTitleAt(index));
}
};
tabbedPane.addChangeListener(changeListener);
Container contentPane = frame.getContentPane();
contentPane.add(tabbedPane, BorderLayout.CENTER);
frame.setSize(400, 150);
frame.setVisible(true);
}
}
class DiamondIcon implements Icon {
private Color color;
private boolean selected;
private int width;
private int height;
private Polygon poly;
private static final int DEFAULT_WIDTH = 10;
private static final int DEFAULT_HEIGHT = 10;
public DiamondIcon(Color color) {
this(color, true, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
public DiamondIcon(Color color, boolean selected) {
this(color, selected, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
public DiamondIcon(Color color, boolean selected, int width, int height) {
this.color = color;
this.selected = selected;
this.width = width;
this.height = height;
initPolygon();
}
private void initPolygon() {
poly = new Polygon();
int halfWidth = width / 2;
int halfHeight = height / 2;
poly.addPoint(0, halfHeight);
poly.addPoint(halfWidth, 0);
poly.addPoint(width, halfHeight);
poly.addPoint(halfWidth, height);
}
public int getIconHeight() {
return height;
}
public int getIconWidth() {
return width;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
g.setColor(color);
g.translate(x, y);
if (selected) {
g.fillPolygon(poly);
} else {
g.drawPolygon(poly);
}
g.translate(-x, -y);
}
}
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