CutViewerView communicates with SliceViewer(Presenter)

[robertapplin]

Describe the outcome that is desired.
The CutViewerView class is passed a SliceViewer(Presenter) object in its constructor. This is a problem because the CutViewerView should only communicate with the CutViewerPresenter so that it is not dependent on a second presenter.

Ideally, the presenters are the medium through which the View and Model should communicate with other objects. So the CutViewerView should communicate with the CutViewerPresenter, and then the CutViewerPresenter is allowed to communicate with the SliceViewer(Presenter) object.

mantid/qt/python/mantidqt/mantidqt/widgets/sliceviewer/cutviewer/view.py

Line 24 in eb3ee01

class CutViewerView(QWidget):

Describe any solutions you are considering
The CutViewerView should not communicate directly with the SliceViewer(Presenter) class. It should instead communicate with the CutViewerPresenter, and then the CutViewerPresenter can communicate with the SliceViewer(Presenter).

I would recommend creating a subscribe_presenter method on the CutViewerView so that the CutViewerPresenter can be notified when an event happens.

Another bug bear of mine is the name of the SliceViewer class. Its not clear if it is a Presenter from the name. Optional bonus to rename this class!

Acceptance Criteria

• CutViewerView no longer communicates directly with the SliceViewer(Presenter)
• Optionally SliceViewer class is renamed to SliceViewerPresenter