jtabbedpanewithcloseicons.java

来自「Semantic Web Ontology Editor」· Java 代码 · 共 99 行

package org.mindswap.swoop.utils.ui;

/**
 * @author Obtained from http://forums.java.sun.com
 *
 */
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
/** * 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 JTabbedPaneWithCloseIcons extends JTabbedPane implements MouseListener {  
	
	public JTabbedPaneWithCloseIcons() {    
		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) {
		try {
			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);    
			}
		}
		catch (Exception ex) {
			ex.printStackTrace();
		}
	}  
	
	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=18;    
			height=18;  
		}  
		
		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);  
		}
	}