CODEWITHSUNDEEP
javajtreemouselistener
Adrian Stamin
Adrian Stamin

Reputation: 697

How do I get a mouse listener on a DefaultMutableTreeNode?

I know I can add a mouseListener to a Jtree, but I need to double click on one of his elements and doSomething();

Upvotes: 1

Views: 2358

Answers (2)

halex
halex

Reputation: 16403

From the documentation of JTree:

If you are interested in detecting either double-click events or when a user clicks on a node, regardless of whether or not it was selected, we recommend you do the following:

final JTree tree = ...;

 MouseListener ml = new MouseAdapter() {
     public void mousePressed(MouseEvent e) {
         int selRow = tree.getRowForLocation(e.getX(), e.getY());
         TreePath selPath = tree.getPathForLocation(e.getX(), e.getY());
         if(selRow != -1) {
             if(e.getClickCount() == 1) {
                 mySingleClick(selRow, selPath);
             }
             else if(e.getClickCount() == 2) {
                 myDoubleClick(selRow, selPath);
             }
         }
     }
 };
 tree.addMouseListener(ml);

Upvotes: 5

Rahul Tripathi
Rahul Tripathi

Reputation: 172398

Check this:-

  public class NetworkTree extends JPanel implements TreeSelectionListener {
  private JTree tree;
  private static int PANEL_WIDTH=250;
  private static int PANEL_HEIGHT=500;
private static String lineStyle = "Horizontal";

public NetworkTree() {
DefaultMutableTreeNode top = new DefaultMutableTreeNode(new Site(
                1,1,"Network","",3));
getSubNodes(top,0);
tree = new JTree(top);
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.addTreeSelectionListener(this);
JScrollPane treeView = new JScrollPane(tree);
add(treeView);

tree.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent me) {
    newNodeSelected();
  }
});
 }
.....
    public void newNodeSelected() {
   JOptionPane.showMessageDialog(null,"Hello");
}

..... }

Upvotes: 1

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