How to Change the icon of a selected Tree Node

> Use a custom renderer.

> http://java.sun.com/docs/books/tutorial/uiswing/compon

> ents/tree.html#display

hi PhHein ,

Thanks for your reply,

i went through this link, and i used that example but i am not able to get it.

i want to display the nodes ,as that is displayed in windows explorer.

when i selected a node , the image should display , and when i selected another node, this current node should display the image ,and the previous node should close.

please suggest some other example.

Thanks in advance,

Cheers,

Murali

muralijavaa at 2007-7-15 5:47:14 >

hi PhHein ,

Thank u for your reply,

i have tried on this and i have looked in to so many examples, using

setIcon(iconSelected);

but it is not working,

i will try on this again and see,

please can you suggest some other exaples.

Thank u,

Cheers,

Murali

muralijavaa at 2007-7-15 5:47:14 >

hi PhHein ,

Thank you for your reply,

http://groups.google.com/group/comp.lang.java.gui/browse_thread/thread/7680a7746ab59fbd/f0b56a3bd6ef85d7?lnk=st&q=void+seticon(icon+icon)+example+for+jtree&rnum=6&hl=en#f0b56a3bd6ef85d7

http://www.javalobby.org/forums/thread.jspa?threadID=16326&tstart=15

http://www.codase.com/search/display?file=L2dlbnRvbzIvdmFyL3RtcC9yZXBvcy9zb3VyY2Vmb3JnZS9tamJ3b3JsZC9tamJXb3JsZF9qb2dsX3NvdXJjZV82MDBfemlwL21qYndvcmxkL3NvdXJjZS9tamJXb3JsZC9tdHJlZUNlbGxSZW5kZXJlci5qYXZh&lang=java&off=975+993+

http://groups.google.com/group/comp.lang.java.gui/browse_thread/thread/f491cfe06c151b9e/10bcb6dbd697ce74%2310bcb6dbd697ce74

http://java.sun.com/docs/books/tutorial/uiswing/components/icon.html

http://java.sun.com/docs/books/tutorial/uiswing/components/label.html

http://www.java2s.com/Code/Java/Swing-Components/IconNodeTreeExample.htm

http://www.javareference.com/jrexamples/viewexample.jsp?id=46

http://doc.trolltech.com/4.2/widgets-icons.html

i have searched and went through this examples, some were very useful

I will look in to that site,

Thank u onceagain

Thanks,

Cheers,

Murali

muralijavaa at 2007-7-15 5:47:14 >

Hi Philip,

Thank you very much for your reply,

i am posting my file, i am not able to find the mistakes, i think the error is in "if statement".

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTree;

import javax.swing.JPopupMenu;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.TreeSelectionModel;

import javax.swing.event.TreeSelectionEvent;

import javax.swing.event.TreeSelectionListener;

import javax.swing.tree.DefaultTreeCellRenderer;

import javax.swing.ImageIcon;

import javax.swing.tree.TreePath;

import java.net.URL;

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

import javax.swing.event.*;

public class TreeEx1

{

JFrame frame;

JTree mytree;

JScrollPane scrollpane;

public TreeEx1()

{

//Creating Frame

frame=new JFrame("Tree & ComboBox");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setLayout(null);

//Creating Tree Nodes

DefaultMutableTreeNode rootnode=new DefaultMutableTreeNode("Root Node");

DefaultMutableTreeNode childnode=new DefaultMutableTreeNode("Child Node");

DefaultMutableTreeNode childonenode=new DefaultMutableTreeNode("ChildOne Node");

DefaultMutableTreeNode adapter1=new DefaultMutableTreeNode("Adapter 1");

DefaultMutableTreeNode adapter2=new DefaultMutableTreeNode("Adapter 2");

DefaultMutableTreeNode childtwonode=new DefaultMutableTreeNode("ChildTwo Node");

DefaultMutableTreeNode adapter3=new DefaultMutableTreeNode("Adapter 1");

DefaultMutableTreeNode adapter4=new DefaultMutableTreeNode("Adapter 2");

mytree = new JTree(rootnode);

scrollpane = new JScrollPane(mytree);

scrollpane.setBounds(new Rectangle(20,20,200,500));

/*// Creatin Image Icons to Nodes

Icon main=new ImageIcon("images/Main.jpg");

Icon main_sub = new ImageIcon("images/Main_Sub.jpg");

Icon main_child= new ImageIcon("images/Main_Child.jpg");

*/

/*Icon main=new ImageIcon("Main.jpg");

Icon main_sub = new ImageIcon("Main_Sub.jpg");

Icon main_child= new ImageIcon("Main_Child.jpg");

Icon main_open=new ImageIcon("folderOpen.gif");

Icon main_close = new ImageIcon("folder.gif");

Icon main_leaf= new ImageIcon("folder.gif");

*/

ImageIcon main_open= createImageIcon("left.gif");

ImageIcon main_close =createImageIcon("folder.gif");

ImageIcon main_leaf= createImageIcon("right.gif");

DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer)mytree.getCellRenderer();

renderer.setLeafIcon(main_leaf);

renderer.setClosedIcon(main_close);

renderer.setOpenIcon(main_open);

mytree.setCellRenderer(renderer);

rootnode.add(childnode);

childnode.add(childonenode);

childnode.add(childtwonode);

childonenode.add(adapter1);

childonenode.add(adapter2);

childtwonode.add(adapter3);

childtwonode.add(adapter4);

frame.getContentPane().add(scrollpane,BorderLayout.CENTER);

frame.setSize(1025,750);

frame.setVisible(true);

ImageIcon leafIcon = createImageIcon("right.gif");

ImageIcon leafOpen = createImageIcon("left.gif");

ImageIcon leafClosed = createImageIcon("folder.gif");

if (leafIcon != null)

{

//DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();

renderer.setLeafIcon(leafClosed);

mytree.setCellRenderer(renderer);

if(leafIcon == null)

{

renderer.setLeafIcon(leafOpen);

mytree.setCellRenderer(renderer);

}

else

{

renderer.setLeafIcon(leafClosed);

mytree.setCellRenderer(renderer);

}

}

else if(leafIcon == null)

{

renderer.setOpenIcon(leafOpen);

mytree.setCellRenderer(renderer);

System.err.println("Leaf icon missing; using default.");

}

else

{

renderer.setClosedIcon(leafClosed);

mytree.setCellRenderer(renderer);

}

} // End of Constructor TreeEx()

public static ImageIcon createImageIcon(String path)

{

URL imgURL = TreeEx1.class.getResource(path);

URL imgURL1 = TreeEx1.class.getResource(path);

if((imgURL != null))

{

return new ImageIcon(imgURL);

}

else if((imgURL == null))

{

return new ImageIcon(imgURL1);

}

else

{

System.out.println("Hello ");

System.err.println("Couldn't find file: " + path);

return null;

}

}

//Main()

public static void main(String[] args)

{

TreeEx1 treeex1=new TreeEx1();

System.out.println("Tree Combo Example");

}// End of main()

}// End of Class

Thanks,

Cheers,

Murali.

muralijavaa at 2007-7-15 5:47:14 >