JTree expand event

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Peter Plumber - 18 May 2006 13:54 GMT

Hi,

I do have Tree base on JTree and want to respond
to the expand (and collapse) event of the treenodes
which listener should I add to which object?
any ideas?

thx

Peter

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Denis - 18 May 2006 14:15 GMT

Peter Plumber ha scritto:

> Hi,
>
> I do have Tree base on JTree and want to respond
> to the expand (and collapse) event of the treenodes
> which listener should I add to which object?
> any ideas?

Before to ask please see Java API...
JTree has a method called
addTreeExpansionListener(TreeExpansionListener tel)...
Wow!

DM

> thx
>
> Peter

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Peter Plumber - 18 May 2006 16:07 GMT

> Before to ask please see Java API...
> JTree has a method called
> addTreeExpansionListener(TreeExpansionListener tel)...
> Wow!

thanks a lot
I could not find it

Peter

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Thomas Fritsch - 18 May 2006 14:29 GMT

> I do have Tree base on JTree and want to respond
> to the expand (and collapse) event of the treenodes
> which listener should I add to which object?
> any ideas?

There are 2 possibilities:
(1) You want to be notified *after* a tree-node has been
collapsed or expanded:
Call yourTree.addTreeExpansionListener(TreeExpansionListener)

(2) You want to be notified *before* a tree-node will
collapse or expand:
Call yourTree.addTreeWillExpandListener(TreeWillExpandListener)

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Thomas

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JTree expand event

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