Segfaults/freezes in VatesSimpleGUI with non-3D MDWorkspaces

[Janik Zikovsky]

I've had some odd behavior looking at 2D MDWorkspaces... I created a 2D workspace with this code:

CreateMDWorkspace(Dimensions='4',Extents='-5,5,-5,5,-5,5,-5,5',Names='Q_sample_x,Q_sample_y,Q__sample_z,t',Units='A,A,A,sec',SplitInto='5',SplitThreshold='2000',MaxRecursionDepth='3',
		MinRecursionDepth='1',	OutputWorkspace='MD_4D')
CreateMDWorkspace(Dimensions='3',Extents='-5,5,-5,5,-5,5,',Names='x,y,z',Units='A,A,A',SplitInto='5',SplitThreshold='2000',MaxRecursionDepth='3',
		MinRecursionDepth='1',	OutputWorkspace='MD_3D')
CreateMDWorkspace(Dimensions='2',Extents='-5,5,-5,5',Names='x,y',Units='A, m',SplitInto='5',SplitThreshold='2000',MaxRecursionDepth='3',
		MinRecursionDepth='1',	OutputWorkspace='MD_2D')

... and opened it into Vates simple view (within MantidPlot). I have some situations where when I would go to Multislice, or when I would close the view and then reopen it would freeze my desktop and I had to switch to a console to kill MantidPlot.

I also got a couple of segfaults when trying e.g. the ThreeSlice button with these workspaces. Maybe because they have no data??

[Owen Arnold]

Should we read the dimensionality of the data coming in to the Vates Simple GUI and gracefully exit if the user is trying to use it without having 3D-4D data before any other processing?

Other option is to allow the visualisation/rebinning of nD data, which should work, but disable multislice and three slice view, which are 3D+ only tools. Simple view should work with whatever we want. We probably ought to be able to use the simple gui with < 3D data so I suggest this option.

[Michael Reuter]

Refs #3756. Only enable simple interface for 3 and 4 dimensional data.

With the advent of the Slice and Line viewers, the simple interface is being restricted to only handling 3D and 4D data.

Changeset: e222a4953d1fcd0027a87e9fcd054f5c866edc85

[Michael Reuter]

Refs #3756. Only enable simple interface for 3 and 4 dimensional data.

With the advent of the Slice and Line viewers, the simple interface is being restricted to only handling 3D and 4D data.

Changeset: e222a4953d1fcd0027a87e9fcd054f5c866edc85

[Michael Reuter]

To test, use the above examples. Only the 4D and 3D workspaces should open with the simple interface. Please note, no other operations can be done other than opening since the workspaces contain no data.

[Owen Arnold]

Didn't think i'd have time to test this, but looks like I will.

[Owen Arnold]

It's not possible to visualise 2D workspaces like this any more.

[Stuart Campbell]

This ticket has been transferred to github issue ​4603