disable Croshair in 3D plots

[KyleQianliMa]

Description of work

EWM 10076

This PR disables crosshair functions in 3D plots by hiding the crosshair button from users.

Summary of work

Fixes #xxxx.

Further detail of work

To test:

To test, consider three scenarios labeled as mantid 3D plotting options: surface, wireframe and mesh. In each scenarios, users should not see the crosshair button and changing axes or any other options should not crash mantid. Make sure testers set facility to SNS first.

Scenario 1 - Surface plot:
Run the following code:

from mantid.simpleapi import *
import matplotlib.pyplot as plt

data = Load('MUSR00015189.nxs')
data = mtd['data_1'] # Extract individual workspace from group

fig, ax = plt.subplots(subplot_kw={'projection':'mantid3d'})
ax.plot_surface(data)
plt.show()
 

Scenario 2 - Wireframe plot:

from mantid.simpleapi import *
import matplotlib.pyplot as plt

data = Load('MAR11060.nxs')

fig, ax = plt.subplots(subplot_kw={'projection':'mantid3d'})
ax.plot_wireframe(data, color='#1f77b4')
plt.show()

Scenario 3 - Mesh plot:

from mantid.simpleapi import *
import matplotlib.pyplot as plt
import numpy as np

from mpl_toolkits.mplot3d.art3d import Poly3DCollection
from mantid.api import AnalysisDataService as ADS

# load sample shape mesh file for a workspace
ws = CreateSampleWorkspace()
# alternatively: ws = Load('filepath') or ws = ADS.retrieve('ws')
ws = LoadSampleShape(ws, "tube.stl")

# get shape and mesh vertices
sample = ws.sample()
shape = sample.getShape()
mesh = shape.getMesh()

# Create 3D Polygon and set facecolor
mesh_polygon = Poly3DCollection(mesh, facecolors = ['g'], edgecolors = ['b'], alpha = 0.5, linewidths=0.1)

fig, axes = plt.subplots(subplot_kw={'projection':'mantid3d'})
axes.add_collection3d(mesh_polygon)

axes.set_mesh_axes_equal(mesh)
axes.set_title('Sample Shape: Tube')
axes.set_xlabel('X / m')
axes.set_ylabel('Y / m')
axes.set_zlabel('Z / m')

plt.show()

None of the plots should give user the option of enabling crosshair(button hidden).

---

Reviewer

Please comment on the points listed below (full description).
Your comments will be used as part of the gatekeeper process, so please comment clearly on what you have checked during your review. If changes are made to the PR during the review process then your final comment will be the most important for gatekeepers. In this comment you should make it clear why any earlier review is still valid, or confirm that all requested changes have been addressed.

Code Review

• Is the code of an acceptable quality?
• Does the code conform to the coding standards?
• Are the unit tests small and test the class in isolation?
• If there is GUI work does it follow the GUI standards?
• If there are changes in the release notes then do they describe the changes appropriately?
• Do the release notes conform to the release notes guide?

Functional Tests

• Do changes function as described? Add comments below that describe the tests performed?
• Do the changes handle unexpected situations, e.g. bad input?
• Has the relevant (user and developer) documentation been added/updated?

Does everything look good? Mark the review as Approve. A member of @mantidproject/gatekeepers will take care of it.

Gatekeeper

If you need to request changes to a PR then please add a comment and set the review status to "Request changes". This will stop the PR from showing up in the list for other gatekeepers.