asked on

JTree node selection

Hi ,
I have created a tree structure as follows and i have made the root element set to invisible.
so the structure is as follows

121212
-----12
-----13
-----14
141414
------111
------112

Now when i click 121212 then i should display a dialog using thenode value and when i click 12or 13 or 14 i should display another dialog.

Now how can i tell my program which node i am clicking i mean the parent(121212) or the child(12 or 13 or 14).
I have tried the methods for the treenode like isLeaf, getChildcount and others but could not find a solution.

Can anybody help me .

Thanks in advance.

regards,
said

zzynx

Try

private void theTreeMousePressed(java.awt.event.MouseEvent evt) {
if (SwingUtilities.isLeftMouseButton(evt)) {
DefaultMutableTreeNode nodeClickedOn = getSelected();
}
}

public DefaultTreeNode getSelection() {
if (theTree.getSelectionPath()==null) return null;
return (DefaultTreeNode)theTree.getSelectionPath().getLastPathComponent();
}

zzynx

Of course in conjunction with

yourTree.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent evt) {
theTreeMousePressed(evt);
}
});

zzynx

Better:

yourTree.addTreeSelectionListener( new TreeSelectionListener () {

public void valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode nodeClickedOn = getSelected();
if (nodeClickedOn!=null) {
// Do whatever you want to do
}
}

});

zzynx

Sorry, there's a typo in getSelection():

public DefaultMutableTreeNode TreeNode getSelection() {
if (theTree.getSelectionPath()==null) return null;
return (DefaultMutableTreeNode)theTree.getSelectionPath().getLastPathComponent(); // <<<<< DefaultMUTABLETreeNode
}

saidreddy

ASKER

Hi all,
Thanks for your replies.
But what i was expecting was if i click the sub node then i should know that i have clicked the subnode and if i have clicked the parent node then i should now i have clicked parent node.
As before i have said i have to display a dialog basing on the value and the tree consists of many nodes and child nodes and i have to know whether it is a child node or a parent node which i have clicked.

thanks once again

regards,
said

ASKER CERTIFIED SOLUTION

zzynx

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Mick Barry

tree.addTreeSelectionListener( new TreeSelectionListener ()
{
public void valueChanged(TreeSelectionEvent e)
{
TreePath selected = e.getNewLeadSelectionPath();
if (selected!=null)
{
TreeNode node = selected.getLastPathComponent();
if (node.isLeaf())
{
// leaf node selected
}
else
{
// non-leaf node selected
}
}
}
});

zzynx

Thanks for accepting