Apply layout of one set of dockwidgets to a different set about kddockwidgets

[iamsergio]

I don't have a better answer than those workarounds, the use case is a bit exotic.

If you have access to DockWidget_p.h you can change d->affinities yourself, if you are aware of possible edge cases (I listed a few).

I'm tempted to allow changing affinities if the dock widget is currently closed.

[bbc131]

Actually, my first idea cannot work. I cannot make the LayoutSaver save the layout of a dockwidget with unique-name "A" and restore it on another dockwidget with unique-name "B". Changing the affinites doesn't help here, forget this idea.

So currently, I have only the second idea, where I replace the unique names (and affinities) within the serialized layout.
This works, I tested it.
But I really don't like to rely on the fact, that I can get the layout in plain-text and find and replace unique names therein.

Generally speaking, the layout is transferred from one set of dockwidgets to another set of dockwidgets, simply using a mapping between the unique names.
The mapping can be applied on the serialized plain-text layout, as already said, but it could also be done right before serialization and restoration.
In any case, the responsibility that there are no conflicts etc. would lie on the user.

I think this could be a feature of the LayoutSaver. It would be a single function which sets a mapping. And if a mapping is set, right after serialization or right before restoration, the unique-names of all dock-widgets and main-windows in LayoutSaver::Layout would then be changed.

layout_saver = LayoutSaver()
# Generalize the layout; Could also use this final names if they are known at this point of time
layout_saver.use_mapping( { "MW_0"  : "MW_x", 
                            "DW_0_A": "DW_x_A", 
                            "DW_0_B": "DW_x_B" } )
generalized_layout = layout_saver.serializeLayout()

...

layout_saver = LayoutSaver()
layout_saver.use_mapping( { "MW_x"  : "MW_1", 
                            "DW_x_A": "DW_1_A", 
                            "DW_x_B": "DW_1_B" } )
layout = layout_saver.restoreLayout(generalized_layout)

This would need to be extended, to have one mapping for the unique-names and one for the affinities.