Update tree node icon, better way?

Question

Hi,.
I have my own custom renderer for my JTree....such as
public class MyTreeNodeRenderer extends JLabel implements TreeCellRenderer {
public Component getTreeCellRendererComponent(
        JTree treeVal,
        Object valueVal,
        boolean selectedVal,
        boolean expandedVal,
        boolean leafVal,
        int rowVal,
        boolean hasFocusVal) {
        MyTreeNode node = (MyTreeNode) valueVal;
          // get the latest type for this node
        node.type = getType(node);
        if (node.type == 1) {
                setIcon(TYPE1_ICON);
         else {
                setIcon(TYPE_BASIC_ICON);
               return this;
}...intially the tree nodes have their icons, as they should...later on their "type" is updated...so instead of being 1..its now something else...so the icon should change.....but it doesnt occur fast enough...so i added this to my renderer
public void doRepaint() {
        repaint();
        myTree.repaint();
    }basically anytime i needed to update the icon in the tree i called the doRepaint when i want the new icon to appear in the tree..that helped somewhat..but it is still kinda slow....any ideas how to do this?

Answer 1

valueForPathChanged() serves different purposes as you can see from its description. You need to call treeModel.nodeChanged(node) after your node changed its "type". If you don't want to hold or don't have treeModel reference you could use tree classes from .useful library and be able to call nodeChanged() directly from a node that has been changed.
Denis Krukovsky
http://dotuseful.sourceforge.net/