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save/restore window layout [message #1234972]

Thu, 23 January 2014 04:04

Eclipse User

We are working on a pure Eclipse 4 business application. Different windows on different monitor should be saved as a defined layout.

I have implemented a ResourceHandler that saves the configuration for each user/machine (no deltas) and restore this configuration when starting. Depending on the definition location of the TrimmedWindow it works - or not. The window defined in Application.e4xmi works fine. With the windows defined in the fragments.e4xmi of the plugins we have a problem:

java.lang.IllegalArgumentException: The selected element org.eclipse.e4.ui.model.application.ui.basic.impl.TrimmedWindowImpl@7da17da1...must be visible in the UI presentation

If I remove the selectedElement in the <application:Application ..> tag the window is restored. But the x, y, width and height are not correct. After debugging I saw that the ModelAssembler class overwrites this values. If I remove the ModelAssembler in our ResourceHandler just when restoring it works all fine.

Can I just ignore the ModelAssembler when restoring?

Thx for any help on this subject
Beat

Re: save/restore window layout [message #1235194 is a reply to message #1234972]

Thu, 23 January 2014 14:42

Eclipse User

The most likely cause is that the MWindow's 'toBeRendered' (TBR) flag has been set to 'false'. In order to qualify to be the 'selectedElement' for a container the element must be:

a) A child of the container (of course)
b) Be in the presentation by having the TBR flag set to true.

There can be a case made that the model's cleanup code should automatically reset the 'selectedElement' field should it become invalid (making it harder to save a corrupt model)...

Re: save/restore window layout [message #1235358 is a reply to message #1235194]

Fri, 24 January 2014 01:20

Eclipse User

Thx for your response. It is a child (we have 4 TrimmedWindow as children). 3 are TBR false and the selected one is set TBR true and visible true. As I saw in different bugs there seems to be a problem...

But back to my question... If the model is saved and I resore it. Is a need I can't see to process the ModelAssembler?

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