The usability and value of most modern dashboards becomes seriously questioned if the data shown is fixed, and the user does not have the ability to zoom in or drill-down into the data to a more detailed view.  Implementing this functionality can sometimes be a time consuming task - a lot of plumbing code is needed to connect all the components and handle the events to interpret the drill-down actions and the parameters.  The whole purpose of the DrillDownManager is to make this task...

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