TimeBarRenderer: renders the intervals itself (The DefaultTimeBarRenderer uses a JButton)
TimeBarGapRenderer: renders the gps between intervals (can be used to render to a region outside the gap by supplying a minimum width)
TimeScaleRenderer: renders the time scale (The provided default scale is quite simple)
GridRenderer: renders the background grid of the timebar viewer
HeaderRenderer: Renderer for rendering the row header
(c) 2004 Peter Kliem