I have been digging around, and not found an easy way so far without me just building it from scratch via a tag configuration manager.
Is there a relatively easy way to get the Swing tree UI for the Tag browser parametrized by the provider?
Ideally, I would be able to render one, and then somehow track the users selection on it.
Perhaps:
This feels like a classic Keith XY problem 
Are you asking "is there a way to readily obtain a tag tree UI element I can render somewhere", or "is there a way to listen for selection changes in the main tag browser dockable frame", or something else entirely?
This is a "I am trying to build something user friendly in the designer without re-creating the wheel 
Long story short, I am overhauling some of the configuration elements of my Tag CICD Module to:
This has landed with a UI to manage these auto import/export rules and where things land
Along the way, when adding/editing one of these configs, the User needs to determine where in the tag tree they want to export from, and I am trying to just figure out if there is a way I can add a Tag tree into my dialog that tracks the users selection. I dont like my Base Tag Path: field, and I want to just make it a tree instead to keep life easy for the user who might not know their paths. Would also make it easier instead of them having to type _types_ to reference the UDT Definitions.
Note: To anyone looking at this, all of this is still WIP and I have plenty of things to clean up so cut me some slack
Note: I also know I am doing this right before 8.3 and lots is going to change and I am aware, I am attempting to make this as 8.3 forward compatible as possible
Perhaps you can tie your module configuration to a menu in the tag browser--there's a method to add your own actions.
com.inductiveautomation.ignition.designer.tags.tree.TagBrowserTree#getBuilder
Set some options, get a standard JTree, add a standard TreeSelectionListener to it.
The tree selection should be a tree path; treePath.getLastPathComponent() will be an instance of BrowseTreeNode which you can examine for a TagPath.
Actually, even easier might be one of the static methods on com.inductiveautomation.ignition.designer.tags.tree.selection.TagSelectionTreePanel
Or
com.inductiveautomation.ignition.designer.tags.tree.selection.TagReferenceAction#TagReferenceAction(com.inductiveautomation.ignition.designer.util.TextlikeComponent)
Or even
com.inductiveautomation.ignition.designer.sqltags.dialog.InsertTagAction#InsertTagAction(com.inductiveautomation.ignition.designer.model.DesignerContext, com.inductiveautomation.ignition.designer.util.TextlikeComponent)
Keith sniped you, huh?
Well, the first one was right before I had to go pick up my kids from school, and is "lower level". The second was after I had a few more minutes to look at how we wrap it up in a nice selector with a popup - obviously, in quite a few different ways, but the general trend is pretty clear.
It's OK to just say "yeah, he got me". 
