An update that notifies that a node in the tree has been selected.
A project update message sent on the Edit Bus.
An update message describing some change in the data kept by the plugin.
A project viewer update message sent on the Edit Bus.
As of ProjectViewer 3.0, events are sent using jEdit's EditBus. The following events are sent by ProjectViewer:
ProjectUpdate: project-specific events, which deal with changes in the project's internal data
ViewerUpdate: GUI updates, which deal with changes in the plugin's user interface.
StructureUpdate: changes in the organization of projects and groups managed by the plugin.
NodeSelectionUpdate: changes in the tree selection.