What is the best method for defining a scheduler visualisation (and editor)? Basically I think I am looking for something similar to a Gantt chart (not quite the same) where I have a start and end date. However it isn't as simple as that, as I have 2 start and end dates for the system (A primary and a secondary which will always be less than or equal to the primary date range).
Its almost like I am looking for a gantt chart with a range slider in between the extents of the primary dates. From a user experience point of view would this work? (The two items are very closely related). Do you have any other suggestions for better ways of doing this?