Hiding some nodes in jtree

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Srikanth - 19 Jan 2006 09:32 GMT

How can i hide and show some nodes in the tree based on some criteria?
Right now i done it this way(given below). But its not working...

1) I have extended the DefaultMutableTreeNode into CustomTreeNode which
contains a variable called visible and contains methods setVisible()
and isVisible()
2) I have overridden the DefaultTreeModel.
a) getChildCount() gives the count of the visible node
b) getChildIndex() gives the index of the nodes among the visible
nodes
c) getChild() gives that node.

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hiwa - 19 Jan 2006 09:41 GMT

That should be a cell renderer issue ...

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Srikanth - 19 Jan 2006 09:48 GMT

No that node shouldn't be rendered at all..

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Thomas Weidenfeller - 19 Jan 2006 11:01 GMT

> How can i hide and show some nodes in the tree based on some criteria?
> Right now i done it this way(given below). But its not working...
[quoted text clipped - 7 lines]
> nodes
> c) getChild() gives that node.

That's going in the right direction. What one typically does is to
implement a wrapper model. It wraps the original model, provides the
same API (TreeModel), but does some filtering on the original model data
before passing it through.

In your case such a wrapper model would take your isVisible() flag in
the tree nodes into account when responding to getChild...() method
invocations. Very similar to what you did in your subclassed model
implementation.

There is some example for a JList or JTable in Sun's GUI tutorial to
sort list data before it is displayed. The structure is the same for a
Tree Model.

/Thomas

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Hiding some nodes in jtree

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