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TreeViewer with a ViewerFilter and empty nodes with expand buttons [message #328493]

Mon, 26 May 2008 15:49

Eclipse User

Originally posted by: nn.nnn.com

I have a TreeViewer with a ViewerFilter. When a parent node has some
children but they are all filtered out, it still gets the plus
expand/collapse button. Is this normal behavior or can I fix this somehow?

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Re: TreeViewer with a ViewerFilter and empty nodes with expand buttons [message #328494 is a reply to message #328493]

Mon, 26 May 2008 16:08

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

https://bugs.eclipse.org/bugs/show_bug.cgi?id=203950

exquisitus schrieb:
> I have a TreeViewer with a ViewerFilter. When a parent node has some
> children but they are all filtered out, it still gets the plus
> expand/collapse button. Is this normal behavior or can I fix this somehow?
>

--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------

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Re: TreeViewer with a ViewerFilter and empty nodes with expand buttons [message #328541 is a reply to message #328493]

Tue, 27 May 2008 13:43

Eclipse User

Originally posted by: eclipse-news.rizzoweb.com

exquisitus wrote:
> I have a TreeViewer with a ViewerFilter. When a parent node has some
> children but they are all filtered out, it still gets the plus
> expand/collapse button. Is this normal behavior or can I fix this somehow?
>

As it stands right now, you have to embed knowledge of the viewer
filters into the content provider - not ideal, but it does work. It
helps to make the implementation of the filters an abstraction above
both JFace interfaces (ViewerFilter and ITreeContentProvider) to make
the sharing a little easier.
Actually, now that I think about it, I suppose that if the content
provider knows about the filters, you don't need ViewerFilter at all...

Hope this helps,
Eric

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