Make LoadDetectorGroupingFile work with .map files

[Arturs Bekasovs]

Currently it's done in GroupDetectors2, which shouldn't probably care about dealing with files.

[Arturs Bekasovs]

From GroupDetectors2 documentation:

The file must have the following format (extra space and comments starting with # are allowed) :

"unused number1"             
"unused number2"
"number_of_input_spectra1"
"input spec1" "input spec2" "input spec3" "input spec4"
"input spec5 input spec6"
**    
"unused number2" 
"number_of_input_spectra2"
"input spec1" "input spec2" "input spec3" "input spec4"

Each phrase in "" is replaced by a single integer. The section of the file that follows ** is repeated once for each group.

Some programs require that "unused number1" is the number of groups specified in the file but Mantid ignores that number and all groups contained in the file are read regardless. "unused number2" is in other implementations the group's spectrum number but in this algorithm it is is ignored and can be any integer (not necessarily the same integer)

An example of an input file follows:

2
1  
12  
1 2 3 4 5
6 7 8 9 10
11 12
2  
10
65 66 67 68 69 
70 71 72 73 74  

[Arturs Bekasovs]

Added a new exception type for errors happened during file parsing.

Refs #7772

Changeset: 43de19fabd73a2d2c0c25f735468b51851a23296

[Arturs Bekasovs]

Added a publicly available function to parse a numeric range.

This is quite a useful one, as I've seen at least 3 different implementations of that. Rigorous tests for it were added as well.

Refs #7772

Changeset: 3894f4aa48a78190997072670f1d41ab45b3fce2

[Arturs Bekasovs]

Added a class to parse Map grouping files and used it in the algorithm.

Refs #7772

Changeset: 427056773b090b429e4618749dc7c5adcc29eea0

[Arturs Bekasovs]

Added tests for Map files.

Refs #7772

Changeset: 8c98af86f39b3963f5a49eea80991edf1b340bc2

[Arturs Bekasovs]

Make FilePropertyWidget use default extension.

Before these changes it was using default extension for save dialogs only. The point here is that code for save and load dialogs is doing almost the same thing and should probably be moved to a single method. Additionally, for some reason load dialogs are using ".ext (*.ext)" approach, while save dialogs are displaying "*.ext" straight away. Somebody should probably take a look at that as a maintenance.

Refs #7772

Changeset: dde8e9f33ad284a41c871697c69e417ab2dc5885

[Arturs Bekasovs]

Fix build errors due to using initialization lists.

Refs #7772

Changeset: 3030d1c6adff434c76c551fff8c124375ead5411

[Arturs Bekasovs]

Tester:

1. Save an attached grouping.map file somewhere on your drive.
2. Run MantidPlot.
3. Run LoadDetectorsGroupingFile algorithm.
4. Click the Browse for the InputFile. Notice that .map extension was added to the extension list, but make sure that .xml is selected by default.
5. Change the extension to .map and select the grouping.map file.
6. Run the algorithm with some OutputWorkspace name. Make sure it completes silently and the workspace is created.
7. Open the data view for all the spectra of created workspace.
8. Check that spectra with indices (0-9) have a single Y value of 1.0, spectra (10-19) - value of 2.0, and (20-29) - value of 3.0.
9. Read the description of the .map format in the comment above, and try to experiment by changing the contents of grouping.map and checking that the algorithm parses it correctly. Try to introduce errors, e.g. insufficiently many spectra specified for a group, incorrect integer, reversed range, garbage on the line etc, and make sure that informative error messages are returned.
10. Now try to load a AutoTestData/MUSRGrouping.xml file and make sure it parses it correctly as well. Correct values for a resulting workspace: spectra indices (0-31) - value of 2.0, and (32-63) - value of 1.0. This is just to make sure that the old code is not affected.

[Arturs Bekasovs]

Sample grouping Map file

[Roman Tolchenov]

Merge remote-tracking branch 'origin/feature/7772_load_map_grouping_file'

[Stuart Campbell]

This ticket has been transferred to github issue ​8617