start and duration of tasks in project month relative to project start

Hi
at first great work. Ganttproject has made a great effort and progress since i 
tested it the last time in 2006. Keep on as the past Years.

I'm currently perparing serveral grant proposals and outlining the required 
efforts within a new research field. At this early stage of planning it does 
not make sens to define the start and duration of single subprojects, 
workpackages, tasks and subtasks in absolute dates. Usually they are defined in 
project month relative to the project start.

Lets say tasks 5.1 starts at Month 1 of the project and finishes with the 
deliverable at D5.1 due at month 6. Whether Mongh 6 will be December 2011, 
April, June, November 2011 i can not yet tell at this early stage. I do not yet 
know whether the project will be accepted at all, nor when the contracts and 
consortium agreements will be signed. Never the less i do need a rough and 
plausible overview of the different workpackages and major tasks therein of the 
project.

Thus I request to add the possiblity to define the start and durations in 
project months instead of absoulute dates. Further i suggests to add a switch 
which allows to toggle the gantt diagram and perth diagram between displaying 
Project month and absolute dates. Further i suggest to add a start data 
parameter to the global project description and shifting the dates and 
durations of all tasks relative to this date if it is changed.

Christoph

Original issue reported on code.google.com by xhnother...@gmail.com on 2 Mar 2011 at 6:49

Merged into: #85

bardsoftware / ganttproject

start and duration of tasks in project month relative to project start #201