Re: Dynamically Update JT

"Brandon McCombs" <brandon.mccombs@THRWHITE.remove-dii-this>
Wed, 27 Apr 2011 15:26:58 GMT
Jason Cavett wrote:

On Dec 6, 1:44 pm, "Jason Cavett" <> wrote:

I'm trying to program the ability for a node on my JTree to have its
icon change when the node is opened. However, althought it *seems*
that the icon is benig changed (see the code below), the JTree does not
refresh (or at least it doesn't appear that way). Any tips/hints/ideas
on where to go with this?

// the icon has been updated based on the println

I think the problem has to do with how I use my cell renderer.

When I create my tree, I do something like this...

JTree tree = new JTree();
tree.setCellRenderer(new MyOwnTreeCellRenderer());

Within my tree cell renderer (which extends DefaultTreeCellRenderer) I
override the method getTreeCellRendererComponent. This is where I have
the logic to set icons based on what item is in the tree. The problem
I'm having is that if I update one icon, it updates every other node in
the tree. I'm not understanding how to update one single node in the
tree using the TreeCellRenderer (if this is even possible).

Any suggestions?

I just used a conditional in the tree cell renderer to specify which
icon to use so depending on the type of LDAP object I have a different icon:
class MyTreeCellRenderer extends DefaultTreeCellRenderer
private static final long serialVersionUID = 0L;
Font f = new Font("Arial", Font.PLAIN,11);
    public Component getTreeCellRendererComponent(JTree tree,
    Object value, boolean selected, boolean expanded,
    boolean leaf, int row, boolean hasFocus)
      super.getTreeCellRendererComponent(tree, value,
        selected, expanded, leaf, row, hasFocus);

      Node entry = (Node)value;
if (entry.getNodeType().equals("server"))
   setIcon(new ImageIcon(LDAPMgr.class.
else if (entry.getNodeType().equals("domain"))
   setIcon(new ImageIcon(LDAPMgr.class.
else if (entry.getNodeType().equals("organizationalUnit"))
   setIcon(new ImageIcon(LDAPMgr.class.
else if (entry.getNodeType().equals("group"))
   setIcon(new ImageIcon(LDAPMgr.class.
return this;

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