Changing specific TreeNode icons

> Hi,

>

> is it possible to change the icons of specific Leafs?

> In my case i want that some Leafs hava an "abortIcon"

> and others an "aproveIcon".

>

> Info: Those icons will have to be changed during the

> run of my program...

>

> Do i have to extend "DefaultTreeCellRenderer" ?

You don't have to, but it's the easiest way to achieve what you want.

>

> Cant i just specifiy the icons somehow in

> "DefaultMutableTreeNode"?

You can, but you would still need a custom renderer. It can be as simple as this:

===================

import javax.swing.*;

import java.swing.tree.*;

import java.awt.*;

public class MyTreeCellRenderer extends DefaultTreeCellRenderer {

public Component getTreeCellRendererComponent (JTree tree,

Object value,boolean sel, boolean expanded,

boolean leaf, int row, boolean hasFocus) {

super.getTreeCellRendererComponent(tree, value, sel, expanded,

leaf, row, hasFocus);

if(value instanceof MySpecialNodeClass) {

MySpecialNodeClass myNode = (MySpecialNodeClass )value;

Status status = myNode.getStatus();

Icon nodeIcon = null;

switch(status) {

case ABORTED:

icon = ICON_ABORTED;

break;

case APPROVED:

icon = ICON_APPROVED;

break;

case SOME_OTHER_STATUS:

//...

break;

}

setIcon(icon);

}

return this;

}

}

The renderer would have private final static variables for the ICON_XXX items. Your node class would have a getStatus() method that returned the appropriate value from a Status enum.

Jim S.

Niceguy1a at 2007-7-9 21:08:56 >