Q:

Selecting only leafs in JTree

So I want to be able to only select leafs in JTree. There are some solutions online, but they don't work on multiple selection...
What I would like is to find the part of the code that fires when user clicks on a node and modify that part to suit my needs.
I have found a listener within DefaultTreeCellEditor, but that code seem to apply to when only one node is selected at a time...
The bottom line is, where can I find the code that, when nodes gets clicked, decides if it will select it or not, and will it or not deselect all the other selected nodes?

A:

Fixed it!
public class LeafOnlyTreeSelectionModel extends DefaultTreeSelectionModel
{
private static final long serialVersionUID = 1L;

private TreePath[] augmentPaths(TreePath[] pPaths)
{
    ArrayList<TreePath> paths = new ArrayList<TreePath>();

    for (int i = 0; i < pPaths.length; i++)
    {
        if (((DefaultMutableTreeNode) pPaths[i].getLastPathComponent()).isLeaf())
        {
            paths.add(pPaths[i]);
        }
    }

    return paths.toArray(pPaths);
}

@Override
public void setSelectionPaths(TreePath[] pPaths)
{
    super.setSelectionPaths(augmentPaths(pPaths));
}

@Override
public void addSelectionPaths(TreePath[] pPaths)
{
    super.addSelectionPaths(augmentPaths(pPaths));
}

}

