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How to expand a TreeViewer in a view through an IVewPart (verification hook) [message #70599]

Fri, 12 May 2006 10:13

Bertrand

Messages: 2
Registered: July 2009

Junior Member

Hello :)

I've done a testCase with the GUI Recorder where I insert a hook on the
package explorer view.
I've downloaded the Ali Mehregani's codes (cf. the
" http://dev.eclipse.org/newslists/news.eclipse.tptp/msg01854. html" news to
know more - very usefull) to get access to the controls located in this
hooked View (the packageExplorer view), and particularly a tree (likely a
TreeViewer).

I've noticed that I can't get control on all the children of the tree in
my code if it isn't fully expanded (am I right or do I need sleep? :p). To
resolve the problem I just add a recursive method to perform a
setExpanded(true) on each tree item.

Surprisingly, it works but just a bit...
The tree is expanded but the expanded items don't show up!
I've somthing like this:

** initial state -, for ex. fully collapsed but it doesn't matter: **

+MyTreeRoot

** I perform the setExpanded)true) through my verification hook and I get
: **

-MyTreeRoot
|_ << nothing

** instead of (for example): **

-MyTreeRoot
|_FirstChild
| |_file1
|
|_SecondChild

The weird thing is that if I "physically" click on the +MyTreeRoot to
expand it, it perfectly works...

I was wondering if it was due to the cast I made on my tree component (I
did a cast from "Control" to "Tree") because I suppose that the tree in
this view is a TreeViewer.

If someone has a beginning of solution... Cheers

Bertrand.

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Re: How to expand a TreeViewer in a view through an IVewPart (verification hook) [message #71425 is a reply to message #70599]

Sat, 20 May 2006 23:13

No real name

Messages: 404
Registered: July 2009

Senior Member

There could be differences from programmatically expanding a tree vs.
manually expanding it (for example, expansion listeners may not get notified
when programmatically expanding a tree).
I recommend doing an expansion of the tree to the level that you would like
to verify before inserting the hook.

"Bertrand" <bvanier@curamsoftware.com> wrote in message
news:359f743d74ef9fc294a77f6e41969ab6$1@www.eclipse.org...
> Hello :)
>
> I've done a testCase with the GUI Recorder where I insert a hook on the
> package explorer view.
> I've downloaded the Ali Mehregani's codes (cf. the
> " http://dev.eclipse.org/newslists/news.eclipse.tptp/msg01854. html" news to
> know more - very usefull) to get access to the controls located in this
> hooked View (the packageExplorer view), and particularly a tree (likely a
> TreeViewer).
>
> I've noticed that I can't get control on all the children of the tree in
> my code if it isn't fully expanded (am I right or do I need sleep? :p). To
> resolve the problem I just add a recursive method to perform a
> setExpanded(true) on each tree item.
>
> Surprisingly, it works but just a bit...
> The tree is expanded but the expanded items don't show up!
> I've somthing like this:
>
> ** initial state -, for ex. fully collapsed but it doesn't matter: **
>
> +MyTreeRoot
>
> ** I perform the setExpanded)true) through my verification hook and I get
> : **
>
> -MyTreeRoot
> |_ << nothing
>
> ** instead of (for example): **
>
> -MyTreeRoot
> |_FirstChild
> | |_file1
> |
> |_SecondChild
>
>
> The weird thing is that if I "physically" click on the +MyTreeRoot to
> expand it, it perfectly works...
>
> I was wondering if it was due to the cast I made on my tree component (I
> did a cast from "Control" to "Tree") because I suppose that the tree in
> this view is a TreeViewer.
>
> If someone has a beginning of solution... Cheers
>
> Bertrand.
>

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