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thanks a lot. i was just trying to make something like in YIntervalDemo, but this way it is a LOT easier than writing my own IntervalDataset, because i can use a series which is more easy to update if datachanges happen.

i too have this problem. does anybody know how it can be fixed?

maybe you could try to put the whole thing in a scroll pane. i had a similar problem and for the first i solved it like this.