[REACT] Gantt, how to not "block" tasks that have subtasks

[clovisapp]

Hi Bryntum team,

Is there a way to make the task not "blocked" when it has subtasks ?

• changing subtasks dates change the main task dates, but changing the task dates can't be done (because the subtasks are "blocking" it)

• if the tasks has dependencies (gantt links), the task isn't affected by dependencies.
  etc...

  Thanks a lot for your help

[marcio]

Hey,

Have you tried to set the task to manuallyScheduled: true? https://bryntum.com/products/gantt/docs/api/Gantt/model/TaskModel#field-manuallyScheduled

You can get more info on how the scheduling works here https://bryntum.com/products/gantt/docs/guide/engine/gantt_events_scheduling

[clovisapp]

Thanks a lot Marcio,

if

manuallyScheduled: true

for a Gantt task, and subtasks, how can we make the parent task change of duration function of it's subtasks dates, do you have a good practice about that ?

[tasnim]

Hi,

Do you mean you want to calculate the parent task duration when the subtasks duration change?

[clovisapp]

@tasnim, exactly !

[tasnim]

Hi,

It can be either user-provided or calculated, so doing both would not be possible.

[arcady]

Regarding why your parent task doesn't move - it's hard to tell since you haven't provided a test case.

My guess is it probably contains a manually scheduled child task. Then the parent cannot move since its child position is supposed to be set by user manually.

[clovisapp]

Thanks @arcady

The behavior of "groups" just work the right way (cf video in attachment).

• An event of a group can't be moved more in the past than the group start date
• Moving a task in the future makes the group end date change
• Moving the event with the biggest "end date" makes the group move back to the lattest dates of sub tasks

Is that possible to get the same behavior with tasks and sub tasks ?

[clovisapp]

Also setting all tasks as "manuallyScheduled: true," created this issue: viewtopic.php?p=139168#p139168

[arcady]

An event of a group can't be moved more in the past than the group start date

1. setting Start No Earlier Than constraint on a parent task will prevent its children to move earlier than the constraint date (generally speaking all parent constraints are inherited by its children)

   Moving a task in the future makes the group end date change
   Moving the event with the biggest "end date" makes the group move back to the lattest dates of sub tasks

   this is how parent task dates are calculated out of the box (unless a parent is manually scheduled then it's dates are supposed to be provided by user manually)