Sector slicer doesn't update properly when parameters changed

[jack-rooks]

Describe the bug
Trying to update the number of bins used in the sector slicer for 2D data gives an error and does not function.

Traceback (most recent call last): File "C:\Users\Jack\GitRepos\sasview\src\sas\qtgui\Plotting\SlicerModel.py", line 66, in setParamsFromModelItem self.setParams(params) File "C:\Users\Jack\GitRepos\sasview\src\sas\qtgui\Plotting\Slicers\SectorSlicer.py", line 275, in setParams self.right_line.update(phi=phi, delta=None, mline=self.main_line, File "C:\Users\Jack\GitRepos\sasview\src\sas\qtgui\Plotting\Slicers\SectorSlicer.py", line 384, in update self.theta = mline.alpha + self.phi AttributeError: 'LineInteractor' object has no attribute 'alpha'

To Reproduce
Steps to reproduce the behavior:

1. Open SasView and look at the fitting panel that is open by default
2. Select a category and model (cylinder and cylinder was used for this)
3. Enable "2D view" in the options section at the bottom left of the fitting panel
4. Click "Calculate" then "Show Plot" at the bottom right of the window
5. Right click the 2D plot that was generated and click "Edit Slicer Parameters" and select the "Sector" slicer type from the dropdown
6. Change nbins to any value
7. See error

Expected behavior
The number of bins used for the slicer should update

SasView version:

• 6.0.0a1 (main branch)

Operating system:

• OS: Windows 10 Version 10.0.19045 Build 19045

[jack-rooks]

Note: new bug, not present in 5.0.5

[jack-rooks]

Also doesn't work when phi and delta_phi are changed in the slicer parameters, but not when done in the graph by dragging the lines

[jack-rooks]

May be related to #2636

[jack-rooks]

Fixed by 2100_2726_2752_Slicer-bugfixes. Leaving this open for now as it has not been merged

[butlerpd]

All has now been merged so closing this ticket