Disable sliders for dimensions < 4 in simple GUI

[Owen Arnold]

Suggestion by Alex Buts is that for the Slicomatic/multi-slice views, we disable sliders according to the dimensionality of the workspace. Either disable, or just don't show.

[Michael Reuter]

This is a strange request. The multislice view only works for N=3. If you do N<=2, 2D cut planes don't make any sense and neither does the view. We don't know how to handle N>=4 other than doing "time" for N=4. I guess I don't see the point. Some pictures might be nice to get a handle on this request.

[Michael Reuter]

This will actually cover enabling/disabling the time controls based on the dataset dimensionality.

[Michael Reuter]

In [14669]:

Disable the time controls for datasets with no timesteps. This fixes #2968.

[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??

[Michael Reuter]

The simple interface is meant for 3D and 4D data. 2D data won't work since the tools used are inherently 3+1 D. Please evaluate the ticket in that light and open another one to address the 2D or less issue. For that, we'll just have to warn that none of the displays will function.

[Janik Zikovsky]

Made new ticket #3756 for my issues.

[Owen Arnold]

New ticket generated to capture this request as Multislice is inherently 3D+.

[Stuart Campbell]

This ticket has been transferred to github issue ​3815