enhancedtreecellrenderer.java

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import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.text.Utilities;
import java.lang.String;
import java.awt.Component;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.UIManager; 

public class EnhancedTreeCellRenderer extends DefaultTreeCellRenderer{
	private Icon root,host,drive,leaf1,open1,close1,txt,exe,sys,html,ini,zip,music,photo;
	private Icon mp3,rm;
	private Icon han;
    private JTree tree;

	public EnhancedTreeCellRenderer() {
            //设置图标
            String path="./icons/";
	        root  = new ImageIcon(path+"manager.gif");
	        host  = new ImageIcon(path+"host.gif");
	        drive = new ImageIcon(path+"drive.gif");
	        leaf1 = new ImageIcon(path+"file.gif");
	        open1 = new ImageIcon(path+"open.gif");
	        close1= new ImageIcon(path+"close.gif");
	        
	        //10-20	        
	        txt  = new ImageIcon(path+"txt.gif");
	        exe  = new ImageIcon(path+"exe.gif");
	        sys  = new ImageIcon(path+"sys.gif");
	        html = new ImageIcon(path+"html.gif");
	        ini  = new ImageIcon(path+"ini.gif");
	        zip  = new ImageIcon(path+"zip.gif");
	        han  = new ImageIcon(path+"love.gif");
	        music= new ImageIcon(path+"music.gif");
	        photo= new ImageIcon(path+"photo.gif");
	        mp3  = new ImageIcon(path+"mp3.gif");
	        rm   = new ImageIcon(path+"rm.gif");
	}
public Component getTreeCellRendererComponent(JTree tree,Object value,boolean select,boolean expanded,boolean leaf,int row,boolean hasFocus) {
	super.getTreeCellRendererComponent(tree,value,select,expanded,leaf,row,hasFocus);
	DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
	NodeInformation nodeInfo = new NodeInformation(node.getUserObject());
	int type =nodeInfo.getNodeType();
	switch(type) {
		case 0 :setIcon(root);
			break;
		case 1 :setIcon(host);
			break;
		case 2 :setIcon(drive);
		    break;	
		case 5 :setIcon(leaf1);
		    break;
		case 6 :setIcon(open1);
		    break;
		case 7 :setIcon(close1); 
		    break;    
		case 10 :setIcon(txt);
			break;
		case 11:setIcon(exe);
			break;
		case 12:setIcon(sys);
			break;
		case 13:setIcon(html);
			break;
		case 14:setIcon(ini);
		    break;
		case 15:setIcon(zip);
		    break;
		case 16:setIcon(music);
		    break;   
		case 17:setIcon(photo);
		    break;     
		case 18:setIcon(mp3);
		    break;   
		case 19:setIcon(rm);
		    break;   		          
		case 521:setIcon(han);
		    break;        	
		default :
			break;
	}
   if(type==7||type==-1)	
	if (!tree.isEnabled()) 
	  {
	    setEnabled(false);
	    if (type==-1&&leaf) 
	     {
		    setDisabledIcon(leaf1);
	     } 
	    else if (expanded) 
	     {
		    setDisabledIcon(open1);
	     } 
	    else 
	     {
		    setDisabledIcon(close1);
	     }
	   }
	else 
	   {
	     setEnabled(true);
	     if (type==-1&&leaf) 
	      {
		     setIcon(leaf1);
	      } 
	     else if (expanded) 
	      {
		     setIcon(open1);
	      } 
	     else 
	      {
		     setIcon(close1);
	      }
	    }	
		
	return this;
 }
}