Same plot colour when plotting multiple Y table columns

[Arturs Bekasovs]

Run the following script to create a table:

t = WorkspaceFactory.createTable()
t.addColumn("int", "Number")
t.addColumn("double", "Power2")
t.addColumn("double", "Power3")

for i in range(10):
        t.addRow([i, i**2, i**3])

mtd.addOrReplace("table", t)

w = importTableWorkspace("table")

Now select both Y columns in the table and plot them.

Both lines in the resulting plot have the same colour.

[Arturs Bekasovs]

Refs #9058. Create layout for every curve, not just once.

Otherwise the color and symbol type are set only once and are the same for all the curves.

Changeset: 3519ca9804cd87479d0c20be1399958cd99d884b

[Arturs Bekasovs]

Refs #9058. Name variable better.

Changeset: e33309e8189f44100d28dbb3fbf3f6c363a907c8

[Arturs Bekasovs]

Tester:

Check that the problem is fixed. Verify that both colours and symbol types are unique for every column plotted. Try including error columns and verify that they have the same colour as the curves. Check various plot types.

[Jay Rainey]

I tested this on Mantid 3.1 to verify the lines were the same colour. I then built locally and tried several plots on varying numbers of Y columns, all of which produced a different colour and symbol for each line. Code is clean with clear variable names.

[Jay Rainey]

Merge remote-tracking branch 'origin/bugfix/9058_same_colour_for_multiple_y_columns'

Full changeset: ​601d72b423761848440910c9692641e02b52a522

[Stuart Campbell]

This ticket has been transferred to github issue ​9901