I'm a little confused by your question. Are you asking if it's possible to make something like a Gantt chart?
Yes! Something like that. I see that its only possible by using plugins? What about different visualization? Preprogramed Plugins only?
Well, SeedCode (www.seedcode.com) offers a solution that you can adapt where Gantt charts are a possibility. Core Solutions also has this article (http://coresolutions.ca/how-to-gantt-charts-filemaker) on making Gantt charts using Conditional Formatting.
There's an older technique using repeating fields I've seen used as well, where you set up the repeats as very narrow segments, then populate them with calculated container results based on the conditions you need. It's a bit clunky. But it works.
Lots of ways to accomplish this.
I use a calculated pipe "|" character string. This would be difficult, but not impossible to have links and tools tips (calculated) on each pipe. Because they are TEXT they can also have conditional formatting applied.
-- sent from my iPhone4 --