MantidPlot Indicate to the user with hourglass cursor (for example) when long tasks are running.

[Janik Zikovsky]

Specifically, Show Data or Plot Spectrum can take a while with a large EventList in an EventWorkspace, while the on-demand rebinning happens. It looks like the program is hanging while the list is being sorted and rebinned.

[Nick Draper]

Janik,

Can you attach the steps to reproduce a reasonble delay as a comment and then reassign this ticket to Roman Tolchenov

Regards, Nick Draper

[Janik Zikovsky]

Hi Roman, I was asked by Nick to give you the steps to reproduce this problem.

From the MantidPlot gui (fix paths as needed):

###################################################################### #Python Script Generated by Algorithm History Display ###################################################################### LoadEventPreNeXus(EventFilename="/Mantid/Test/Data/sns_event_prenexus/PG3_732_neutron_event.dat",OutputWorkspace="pg3") AlignDetectors(InputWorkspace="pg3",OutputWorkspace="pg3",CalibrationFile="/Mantid/Test/Data/sns_event_prenexus/pg3_mantid_det.cal") DiffractionFocussing(InputWorkspace="pg3",OutputWorkspace="pg3",GroupingFileName="/Mantid/Test/Data/sns_event_prenexus/pg3_mantid_det.cal")

Ok, now the next thing to do is to "Show data" by double-clicking the pg3 workspace. On my system, it takes about 30 seconds for the table to show up. This is because the event lists are being sorted in the background, and this is pretty slow on this large data set. Note that the delay will only happen the first time. Once it is sorted, it stays sorted. You can use the Sort algorithm to sort it another way and then try again.

Sincerely,

Janik Zikovsky

[Nick Draper]

Bulk move of tickets to iteration 27, if your ticket is essential for Iteration 26 then move it back.

[Roman Tolchenov]

Hi Janik,

I think I don't have file PG3_732_neutron_event.dat. Are you sure it's in the repository?

Roman

[Janik Zikovsky]

Hi Roman,

The file was removed from SVN because of its large size. However, you can still get it if you look in an older revision:

​http://trac.mantidproject.org/mantid/browser/trunk/Test/AutoTestData/PG3_732_neutron_event.dat?rev=7000

[Nick Draper]

Bulk move of tickets at the end of iteration 27

[Nick Draper]

Bulk move of tickets at the end of iteration 28

[Nick Draper]

Accepted and assigned tickets moved at iteration 29 code freeze

[Nick Draper]

Bulk move of tickets to iteration 31 at the iteration 30 code freeze

[Roman Tolchenov]

Showing the hourglass cursor when showing the instrument or plotting spectra or bins. re #1454

Changeset: 0a8be452c83026f1c81b9338a13fa395e14eb734

[Roman Tolchenov]

Showing the hourglass cursor when showing the instrument or plotting spectra or bins. re #1454

Changeset: 0a8be452c83026f1c81b9338a13fa395e14eb734

[Karl Palmen]

Testing on a different large event file, I observed the Windows7 equivalent to the hourglass symbol on plot spectrum, fill plot and show instrument. It also showed up on show date when the dialog box was open (when it shouldn't) and I'll make a ticket for this.

[Stuart Campbell]

This ticket has been transferred to github issue ​2301