VSI: render views are restored with wrong size when switching views after resizing the VSI window

[mantid-builder]

This issue was originally TRAC 11778

Original Reporter: @FedeMPouzols

• Open the VSI and move the camera in the standard view.
• Switch to a different view (the state of the standard view is saved) and resize the VSI window
• Switch back to the standard view. You'll see it with the old size.

See how to best fix this.

A quick fix with repaint() calls did not seem do to the trick.

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Keywords: VSI

[mantid-builder]

@FedeMPouzols (2015-05-18T09:16:04):
Curiously enough this doesn't seem to happen when switching back to the MultiSlice view which is apparently resized/re-rendered with the proper size. However the MultiSlice view seems to have different issues: http://trac.mantidproject.org/mantid/ticket/11781.

[AntonPiccardoSelg]

The problem arises in the switchViews method https://github.com/mantidproject/mantid/blob/master/Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/src/MdViewerWidget.cpp#L1046:L1097

Before switching the views we create a snapshot with the saveViewState method and apply an old view state to the new view via restoreViewState.