Maya Tool - Solver UI - Auto-add Marker to active Collection

[david-cattermole]

Feature

As a user works, they may add new Markers on-the-fly, while the Solver UI is open.
It can be annoying to add Markers to the Solver UI after you've added them into the scene.
We expect the user is most likely has the Collection they wish to solve with active in the Solver UI, when a Marker is added to a camera, therefore it makes sense to automatically add this to the Solver UI.

This should only happen when, 1) The Solver UI is opened, and 2) A valid Collection is active.

The user should be able to turn this feature off, but the feature should be turned on by default.

Expected behavior:
When a Marker is created in any way in Maya, the Marker will automatically be added to the Solver UI.

Steps to Reproduce

Example use-case:

1. Open Solver UI
2. Create a Collection (or ensure a Collection is active)
3. Create a Marker using the "Create Marker" shelf button.
   A marker is automatically added to the Collection in step 2.

Another use-case:

1. Open Solver UI
2. Create a Collection (or ensure a Collection is active)
3. Use the "Load Markers" tool
   The loaded markers are automatically added to the Collection in step 2.

Ideally, this feature sure work for all created Markers, and not need to be added explicitly to each tool.

Software Versions

• mmSolver version: All future versions of mmSolver.
• Maya version: All supported Maya versions.
• Operating System (OS): All supported OSs

[david-cattermole]

This feature has been implemented, and is merged onto the "develop" branch ready for the next release.

When a Marker is created via the mmSolver API, an event will trigger and connect the Marker to the "active" Collection node.
When the Collection node's Marker List is updated, the Solver UI will be updated to show the change.