Convenience getter to determine if the current state includes the active
state (a component in the container or the container itself has keyboard
focus)
Determine if this component thinks it is "active", which
affects how the tabs are painted - typically used to indicate that
keyboard focus is somewhere within the component
Convenience getter to determine if the current state includes the armed
state (the mouse is in the tab the component is currently configured to
render).
Convenience getter to determine if the current state includes the pressed
state (the mouse is in the tab this component is currently configured to
render, and the mouse button is currently down)
Convenience getter to determine if the current state includes the
selected state (the tab this component is currently configured to render
is the selected tab in a container)