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[E4AP] Hiding Ui Elements [message #915604]

Mon, 17 September 2012 16:10

Christoph Keimel

Messages: 482
Registered: December 2010
Location: Germany

Senior Member

Hello

From reading Bug 372211 I understand, that the attribute toBeRendered should be used to hide UIElements. I played with this and found out that setting toBeRendered = false has different results for different parts of the model:

a) Used on a Part, PartStack, PartSash it will destroy the element and remove it from the model
b) Used on a HandledMenuItem or HandledToolItem it will hide the element but leave it in the model

This inconsistency makes it difficult to work with persisted models. What is the desired behaviour?

I wanted to hide ui elements without removing them from the model, so I can show/remove elements based on user settings and/or security credentials. Of course this implies, that I would also like to be able to reactivate an element. Is using toBeRendered the best practise in this case?

Thanks
Christoph

[Updated on: Mon, 17 September 2012 16:10]

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Re: [E4Ap] Hiding Ui Elements [message #915630 is a reply to message #915604]

Mon, 17 September 2012 16:59

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

[Sorry thunderbird since the last update has a direct reply resending to
newsgroup]

Am 17.09.12 18:10, schrieb Christoph Keimel:
> Hello
>
> From reading https://bugs.eclipse.org/bugs/show_bug.cgi?id=372211 I
> understand, that the attribute toBeRendered should be used to hide
> UIElements. I played with this and found out that setting toBeRendered =
> false has different results for different parts of the model:
>
> a) Used on a Part, PartStack, PartSash it will destroy the element and
> remove it from the model
> b) Used on a HandledMenuItem or HandledToolItem it will hide the element
> but leave it in the model

Are you sure about that? IIRC e.g. parts are only removed from the model
in case they are marked to do so (through EPartService#REMOVE_ON_HIDE_TAG).

Having worked on the JavaFx renderers I know for sure that at least
there toBeRendered does not result in removal from the model but only
from the UI, so I'd be suprised if this is different with the SWT ones.

Tom

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Re: [E4Ap] Hiding Ui Elements [message #915902 is a reply to message #915630]

Tue, 18 September 2012 07:26

Christoph Keimel

Messages: 482
Registered: December 2010
Location: Germany

Senior Member

Hi Tom

thanks for the quick reply. You are right ... as a test case revealed. We had a bug in our code causing the problem. Good to know we are on the right track.

Greetings
Christoph

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