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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?

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you need to give us more info to work with. Are we talking tens of date ranges or hundreds? Does moving a secondary start date always affect the primary end date? What drawbacks in your proposed solution do you think our suggestions might solve? – James Crook Mar 19 '11 at 12:40
It would also help to know what data you're dealing with, just in terms of being able to map it in my brain. I might be able to refer back to a project I once did if I don't have to think in abstracts. – Rahul Apr 7 '11 at 0:32
What is the task that the user is performing here? – Alex Feinman Apr 7 '11 at 16:31

It sounds like you have a kind of flexible-time/core-time distinction. Try something like this: enter image description here

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For a live example of this, check out hipmunk:… – Rahul Apr 7 '11 at 0:31

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