JTabbedPane添加关闭按钮和缩略图 .

/*
* Arjick@163.com
*
*/
package exec;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.AffineTransform;
import java.util.ArrayList;
import java.util.HashMap;
/**
* 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 JClosableTabbedPane extends JTabbedPane implements MouseListener {
private double scaleRatio = 0.3;
private HashMap<String, Component> maps = new HashMap<String, Component>();
public JClosableTabbedPane() {
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 insertTab(String title, Icon icon, Component component, String tip, int index) {
tip = "tab" + component.hashCode();
maps.put(tip, component);
super.insertTab(title, icon, component, tip, index);
}
public void removeTabAt(int index) {
Component component = getComponentAt(index);
maps.remove("tab" + component.hashCode());
super.removeTabAt(index);
}
public JToolTip createToolTip() {
ImageToolTip tooltip = new ImageToolTip();
tooltip.setComponent(this);
return tooltip;
}
class ImageToolTip extends JToolTip {
public Dimension getPreferredSize() {
String tip = getTipText();
Component component = maps.get(tip);
if (component != null) {
return new Dimension((int) (getScaleRatio() * component.getWidth()), (int) (getScaleRatio() * component.getHeight()));
} else {
return super.getPreferredSize();
}
}
public void paintComponent(Graphics g) {
String tip = getTipText();
Component component = maps.get(tip);
if (component instanceof JComponent) {
JComponent jcomponent = (JComponent) component;
Graphics2D g2d = (Graphics2D) g;
AffineTransform at = g2d.getTransform();
g2d.transform(AffineTransform.getScaleInstance(getScaleRatio(), getScaleRatio()));
ArrayList<JComponent> dbcomponents = new ArrayList<JComponent>();
updateDoubleBuffered(jcomponent, dbcomponents);
jcomponent.paint(g);
resetDoubleBuffered(dbcomponents);
g2d.setTransform(at);
}
}
private void updateDoubleBuffered(JComponent component, ArrayList<JComponent> dbcomponents) {
if (component.isDoubleBuffered()) {
dbcomponents.add(component);
component.setDoubleBuffered(false);
}
for (int i = 0; i < component.getComponentCount(); i++) {
Component c = component.getComponent(i);
if (c instanceof JComponent) {
updateDoubleBuffered((JComponent) c, dbcomponents);
}
}
}
private void resetDoubleBuffered(ArrayList<JComponent> dbcomponents) {
for (JComponent component : dbcomponents) {
component.setDoubleBuffered(true);
}
}
}
public double getScaleRatio() {
return scaleRatio;
}
public void setScaleRatio(double scaleRatio) {
this.scaleRatio = scaleRatio;
}
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);
}
/*public static void main(String args[]) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch (Exception e) {
e.printStackTrace();
}
JClosableTabbedPane pane = new JClosableTabbedPane();
ImageIcon icon = new ImageIcon("images/middle.jpg");
pane.addTab("tab1",new JButton("first Button"),icon);
pane.addTab("tab2",new JButton("sec Button"),icon);
pane.addTab("tab3",new JButton("third Button"),icon);
pane.addTab("tab4",new JButton("fourth Button"),icon);
JFrame frame = new JFrame("Demo");
frame.getContentPane().add(pane,BorderLayout.CENTER);
frame.setSize(500,300);
frame.setLocation(300,200);
frame.show();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}*/
}