CheckboxTree

[JIDE Support]

You just insert tree node to the original tree model, just like what you were doing before in a regular JTree.

Thanks,

[hemna]

Code: Select all

   /**
    * This method inserts a new node dynamically into the tree.
    * Since we only support 2 level tree...we accept 2 params.
    *
    * @param String
    * @param String
    */
   protected void insertNewTreeNode(String level1NodeStr, String level2NodeStr) {
      //first we need to see if level1NodeStr already exists in the tree
      TreeModel myTreeModel = checkBoxTree.getModel();
      DefaultMutableTreeNode level1Node = findLevel1NodeInTree(level1NodeStr);
      
      if (level1Node == null) {
         //levelNodeStr doesn't exist in the tree.
         //we need to add it to the root.
         level1Node = new DefaultMutableTreeNode(level1NodeStr);
         DefaultMutableTreeNode level2Node = new DefaultMutableTreeNode(level2NodeStr);
         level1Node.add(level2Node);
                  
         DefaultMutableTreeNode root = (DefaultMutableTreeNode)myTreeModel.getRoot();
         root.add(level1Node);         
      } else {
         //add the level2NodeStr to the level1Node
         DefaultMutableTreeNode level2Node = new DefaultMutableTreeNode(level2NodeStr);
         level1Node.add(level2Node);
      }      
      
      checkBoxTree.setModel(myTreeModel);
   }
   
   
   /**
    * This method tries to find a level1Node in the tree.
    *
    * @return
    *
    */   
   protected DefaultMutableTreeNode findLevel1NodeInTree(String nodeStr) {
      DefaultMutableTreeNode node = null;
      
      TreeModel myTreeModel = checkBoxTree.getModel();
      Object root = myTreeModel.getRoot();
      int rootChildCount = myTreeModel.getChildCount(root);
      for (int i = 0; i < rootChildCount; i++) {
         DefaultMutableTreeNode child = (DefaultMutableTreeNode)myTreeModel.getChild(root, i);
         
         if (child.getUserObject().toString().compareToIgnoreCase(nodeStr) == 0) {
            node = child;
            break;
         }                  
      }      
      
      return node;
   }

So that is my code for inserting a node. When I run the applet in eclipse, I can see the new node being added into the existing nodes that I find,
but they don't show up in the tree from what I can see.

This is a screenshot of just prior to me adding the new entry.

before_add.png (9.28 KiB) Viewed 18709 times

This is after I a call the insertNewTreeNode() method.

after_add.png (8.89 KiB) Viewed 18709 times

[JIDE Support]

That's not the correct way. You should use DefaultTreeModel#insertNodeInto method.

[hemna]

excellent thank you. That worked like a charm.

[CHEM_Eugene]

Could you help me with my problem? I need to have ability to disable some elements of tree. They must be unselectable.

How I can do it?

Sorry, I have found answer: It needs to override method CheckBoxTree.isCheckBoxEnabled(final TreePath path)

[JIDE Support]

Glad to know that you have figured out the solution.

Thanks,