Paraview: plugin for loading MDEventWorkspace .nxs files

[Janik Zikovsky]

The Saving/Loading of MDEventWorkspaces to .NXS files is making progress.

It would be useful to have a Paraview plugin that loads MDEventWorkspaces from those .nxs files directly instead of going through the EventNexus format files. So far in my tests it has been faster to load a file than doing the conversion from scratch.

The algorithm to do the loading is called (for now) LoadMDEW. Owen, could you implement this? Does it cause a problem that the files have the same extension (.nxs)? We can change the extension for MDEW nxs files if that's needed.

[Owen Arnold]

Agree that this would be an improvement. Should be very simple to implement. PV provides a CanReadFile method. (At the moment I've set this to always be true on existing readers). My understanding is that this gives the ability to select amonst readers when the same file exension is presented. If this works, we would need some way of determining what type of data lies in the file (without reading the whole file) so that true/false can be returned.

[Owen Arnold]

Confirmed that Paraview will attempt to pick up another reader (handling the same extension type) if file loading one is diallowed via CanReadFile small example.

[Janik Zikovsky]

In [13191]:

Refs #3348: CanReadFile() call for eventNexusReader PV plugin.

[Janik Zikovsky]

In [13200]:

Refs #3348: Thread-safe progress updates when rebinning in PV.

[Michael Reuter]

This seems to work as expected.

[Stuart Campbell]

This ticket has been transferred to github issue ​4195