ToolBars that wish to participate in themeing must also implement the following interface
to ensure the toolbar is rendered correctly when in certain states.
For an application that can have active and inactive parts of the UI (like an IDE),
the active view is the area in which the user is currently working in (usually it has
focus).
For an application that can have active and inactive parts of the UI (like an IDE),
the active view is the area in which the user is currently working in (usually it has
focus).
Returns:
true if the toolbar is currently in the active view.
isPrimaryToolbar
boolean isPrimaryToolbar()
Views can sometimes have more than one toolbar. Primary toolbars may be painted differently
from secondary toolbars.