CODEWITHSUNDEEP
javaparent-childjtreetreepath
John Verber
John Verber

Reputation: 755

How to programmatically set selection on a jTree child

I've read through a bunch of questions already asked but haven't see an solid answer yet. I'm trying to set the selection on a jTree in an attempt to create a sort of API for my Java project. I can set selection on a parent node easily with say: myTree.setSelection(1);

Having trouble with any leafs off child nodes. I've have a walk function and I'm looking for a specific string in it. I've managed to return a Object[] when I reach the node with the string I'm looking for. But I can't convert it to a Treepath to use myTree.setSelectionPath(path). Can anyone help out with this? I appreciate it.

//My call
TreeModel model = jTree1.getModel();
        Object getNode = myWalk(model);
        jTree1.setSelectionPath((TreePath) getNode);
        //this throw an error stating that Object[] can't be converted to a path.  

public Object[] myWalk(TreeModel model, String s, String t){
        DefaultMutableTreeNode root = (DefaultMutableTreeNode) model.getRoot();
        DefaultMutableTreeNode child;
        TreeNode[] returnPath = null;
        int childrenCount = root.getChildCount();
        for(int i = 0; i < childrenCount; i++){
            child = (DefaultMutableTreeNode) root.getChildAt(i);
            if(child.toString().equals(s)){
                System.out.println(child.toString());
                int secondChildCount = child.getChildCount();
                DefaultMutableTreeNode secondLevelChild;
                for(int y = 0; y < secondChildCount; y++){
                    secondLevelChild = (DefaultMutableTreeNode) child.getChildAt(y);
                    if(secondLevelChild.toString().equals(t)){
                        System.out.println(secondLevelChild.toString());
                        returnPath = secondLevelChild.getPath();
                        //returnPath = new TreePath(new Object[] {root.toString(), child.toString(), secondLevelChild.toString()});
                    }
                }

            }


        }
        return returnPath;
    }

Upvotes: 1

Views: 4819

Answers (1)

John Verber
John Verber

Reputation: 755

So the solution ended up being simple. I just need to create a new TreePath with and Object array (which I wasn't doing).

So it would look like:

TreeModel model = jTree1.getModel();
Object[] getNode = Walk(model, "sports", "basketball");
TreePath tPath = new TreePath(getNode);
jTree1.setSelectionPath(tPath);

Upvotes: 2

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