JTree Expansion

Marco Stoll

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Jul 20, 2000, 3:00:00 AM7/20/00

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I'm using a JTree and trying to programmly expand to a specific Node. I'm
using the JTree.expandPath(TreePath) Method to invoke this action, but
nothing happens.

Anybody got an idea??

Christian Kaufhold

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Jul 20, 2000, 3:00:00 AM7/20/00

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Marco Stoll <m.s...@w3design.de> wrote:
> I'm using a JTree and trying to programmly expand to a specific Node. I'm
> using the JTree.expandPath(TreePath) Method to invoke this action, but
> nothing happens.

How are you setting up the TreePath?

Christian

dent...@my-deja.com

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Jul 20, 2000, 3:00:00 AM7/20/00

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Ye, you need to refresh the expanded node:

treeModel.nodeStructureChanged(node);
or:
treeModel.nodeChanged(node);

In article <8l6k0g$t03$1...@trinity.hannover.sgh-net.de>,

"Marco Stoll" <m.s...@w3design.de> wrote:
> I'm using a JTree and trying to programmly expand to a specific Node.
I'm
> using the JTree.expandPath(TreePath) Method to invoke this action, but
> nothing happens.
>

> Anybody got an idea??
>
>

Sent via Deja.com http://www.deja.com/
Before you buy.

OODGR

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Jul 20, 2000, 3:00:00 AM7/20/00

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"Marco Stoll" <m.s...@w3design.de> wrote in message
news:8l6k0g$t03$1...@trinity.hannover.sgh-net.de...

> I'm using a JTree and trying to programmly expand to a specific Node. I'm
> using the JTree.expandPath(TreePath) Method to invoke this action, but
> nothing happens.
>
> Anybody got an idea??
>

Try scrollPathToVisible(TreePath) instead and optionally
setSelectionPath(TreePath).

--
OODGR

Christian Kaufhold

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Jul 20, 2000, 3:00:00 AM7/20/00

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[Quoting arranged to chronological order]

dent...@my-deja.com wrote:
>
> In article <8l6k0g$t03$1...@trinity.hannover.sgh-net.de>,
> "Marco Stoll" <m.s...@w3design.de> wrote:

>> I'm using a JTree and trying to programmly expand to a specific Node.

^^^^

To the OP: Does this mean that the node should become "viewable", but
may possibly be a leaf? Then use makeVisible(). expandPath() silently
(argh!) ignores requests to make leafs viewable.
See the JTree javadoc for the definition of "viewable" and "expanded"
and for that horrible (non-)specification of the behaviour of expand-
Path().

> I'm
>> using the JTree.expandPath(TreePath) Method to invoke this action, but
>> nothing happens.

> Ye, you need to refresh the expanded node:
>
> treeModel.nodeStructureChanged(node);
> or:
> treeModel.nodeChanged(node);

This is relevant to the problem exactly because of?

There are no methods nodeStructureChanged or nodeChanged in TreeModel,
only in DefaultTreeModel. And it is not a requirement to use Default-
TreeModel. So that cannot possibly be any solution, even without know-
ing what these methods might do.

Christian

Timo Rantalaiho

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Jul 20, 2000, 3:00:00 AM7/20/00

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In <8l6k0g$t03$1...@trinity.hannover.sgh-net.de> "Marco Stoll" <m.s...@w3design.de> writes:

>I'm using a JTree and trying to programmly expand to a specific Node. I'm

>using the JTree.expandPath(TreePath) Method to invoke this action, but
>nothing happens.

>Anybody got an idea??

This is but a guess, but you could try calling
fireTreeExpanded() or something such as well.

--
Timo.Ra...@helsinki.fi
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