Re: [Planner Dev] patch to add support for FF and SF relationships

[Alvaro del Castillo <acs barrapunto com>]

Hi Kurt!

El dom, 02-04-2006 a las 23:30 -0400, Kurt Maute escribió:
> Hi All,
> 
> Here's my first cut of FF and SF relationship support.  It seems pretty
> solid, I just want to do some more testing to be sure it doesn't break
> anything.  Please feel free to give it a spin and provide feedback.

The patch is applied with no problems to the CVS head version and
compiles correctly.

Some quick tests:

FF: Finish to finish

Add task t1 
Add task t2
Change t2 duration to 5d.
Add predecessor for t2 with t1 (Edit task->Predecessors) using FF.

Task t2 will start 4 days before the start of the project which
shouldn't be possible.

SF: Start to finish

If I add a new task "t1" to a new project and create a second task "t2"
and the make t2 depends on t1 as SF t2 the starts before the project
start date and playing with zoom in and zoom out you can lost the "t2"
task in the canvas gantt view.

So I think a new test to be sure the relation doesn't create a task
starting before the start of the project should be added.

Cheers 

> As part of adding support for these relationships, I added the following
> checks, disallowing the following combinations of constraints and
> relationships.
> 
> * 'Must Start On' and any predecessor relationship are mutually
> exclusive (you can't add one if you have the other)
> 
> * Combining 'Start No Earlier Than' and SF or FF relationships is
> prohibited.
> 
> * Combining SF or FF and any other relationship is prohibited
> 
> Without the above checks you can end up with some pretty odd results and
> a confusing Gantt chart.
> 
> These checks pop up a message dialog if you try to violate them.  Should
> help keep scheduling sane and reasonably easy for the user to follow.
> 
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