J(Check)Tree Problems

Question

Hi,
I'm using the JCheckTree from: http://www.fawcette.com/archives/premier/mgznarch/javapro/2001/01jan01/vc0101/vc0101.asp And have some problems with it, hopefull somebody can help me... (source on website)
1:
In a normal JTree when you dubbleclick on a folder it opens, when I dubbleclick on the JCheckTree nothing happens. I tried using: .setToggleClickCount(2) but that doesn't help. How can I solve this?
2:
In "BasicTreeCellRenderer.java" I use: setIcon(expanded ? UIManager.getIcon("FileView.fileIcon") : UIManager.getIcon("FileView.fileIcon"); to set the Icon for an item, it works. But when I click and select the item the icon is gone and the default Icon is there. When I deselect the Item the right icon is showed agian. How can I fix this?
3:
When I click on a folder al childs are automaticly selected, that's nice. I need that, but it will also be handy when I select all the child items manual the folder will be selected to. Or when I select a few child items the folder checked will be gray. (so the userS can see that items are selected when the folder is closed). How can I build this?
4:
With the option node.isSelected() I can check of the item is selected. How would it be possible to write a function that checks all the items if they are checked and but then in an array?
Hopefully somebody can help me, or push me in the right direction.
Thanks for your time and help!
Greetings,
Rene

Answer 1

4:
With the option I can check of the item is selected.
How would it be possible to write a function
that checks all the items if they are checked
and but then in an array?I already found this one!    
    Enumeration enum = Tree.breadthFirstEnumeration();
    while (enum.hasMoreElements()) {
      CheckTreeNode node = (CheckTreeNode)enum.nextElement();
      if (node.isSelected()) {
         if (node.isLeaf()) {
              // CODE
   }