Organise parameter table by model component

[tcbennun]

As discussed in comments here: http://trac.sasview.org/ticket/475#comment:5

From JIRA:

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SASVIEW-966: Organise parameter table by model component
Torin Cooper-Bennun, 24 July 2018 09:46

In order to reduce confusion of where parameters are coming from in P(Q)S(Q), sum/multi, or more complicated mixture models, the model parameter table could include sub-headings to separate the parameters by model component.

I've mocked it up on the ESS_GUI_beta_approx branch in the simple case of P(Q)S(Q); ​https://github.com/SasView/sasview/commit/a699172f8d2bb2fddba1f168550bbf2d5893a6ca

This currently uses non-checkable, non-selectable, bold-face rows as headings. I'm a bit concerned that using top-level rows as headings may break some other manipulation of the item model, though.

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Piotr Rozyczko, 24 July 2018 10:17

This looks good!

As for potential fallout - (hopefully) all operations on the naked model are done through special methods in GuiUtilities?, so location of potential fixes is well defined. Also, as a general rule I tend to iterate over model items testing if the item is checkable - only then I look for its children etc.

The "Polydispersity" row acts almost exactly like your multi-column description rows.

[tcbennun]

example of param sub-headings in the GUI

[tcbennun]

The parameters 'scale' and 'background' are not part of any single model component. Is it clear to the user what is meant by them if they stand heading-less at the top of the table?

[piotr]

This has been implemented by Torin some time ago and is now pretty well tested in 5.0