CODEWITHSUNDEEP
javaswinguser-interfacejtree
diddles
diddles

Reputation: 124

Detect when expand/collapse (plus/minus) icon is clicked in JTree

I'm writing a MouseListener to replace the default clicking behaviour in the JTree. How can I tell when this icon is clicked so I can expand the row myself? (I know this is default behaviour, but I'm replacing the default MouseListener with my own MouseListener).

Here's my code:

    // Custom mouse listener for the tree
    MouseListener treeMouseListener = new MouseAdapter()
    {
      public void mousePressed (MouseEvent e)
      {
          TreePath path = cameraTree.getPathForLocation(e.getX(), e.getY());

          // Do some methods based on what was clicked
          ...
      }
    };

The TreePath returned by cameraTree.getPathForLocation(e.getX(), e.getY()) is null when clicking on the +/- icon. How can I tell when that +/- icon is clicked?

Upvotes: 0

Views: 945

Answers (1)

SuperRetro
SuperRetro

Reputation: 91

If you are using JTree, you could use a TreeSelectionListener. More info here: http://docs.oracle.com/javase/tutorial/uiswing/components/tree.html

Upvotes: 1

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