autoUpdateParentTasks
Specifies whether to recalculate the parent task's duration and progress when its child tasks are modified.
The Gantt uses the following rules to determine whether to update a parent task when its subtask is modified.
- A parent task's duration equals a summary duration of its child tasks.
- A parent task and its first child starts at the same time.
- A parent task and its last child ends at the same time.
- A parent task's progress is a summary progress of its child tasks.
enablePredecessorGap
Specifies whether users can move or resize a predecessor to change a gap before a successor according to the dependency rules.
The Gantt component allows users to change the gap between tasks only if they move/resize a successor task. Note that users can use only a successor to create the gap between tasks.
The following image illustrates that the Gantt does not resize the gap between tasks when users move the predecessor:
The enablePredecessorGap option allows users to increase/decrease the gap between the tasks with a predecessor. The Gantt component validates these changes and shifts the successor task to comply with the dependency rules if they are violated.
validateDependencies
Enables task dependencies validation.
The Gantt supports the following dependency validation rules:
- Finish to Start (FS) - A successor task's start point should be equal or later than the preceding task's end point.
- Start to Start (SS) - A successor task's start point should be equal or later than the preceding task's start point.
- Finish to Finish (FF) - A successor task's end point should be equal or later than the preceding task's end point.
- Start to Finish (SF) - A successor task's end point should be equal or later than a preceding task's start point.
The Gantt allows you to validate relationships between tasks when they are edited.
User Action | Dependency Type | Gantt's Reaction |
---|---|---|
Move a predecessor task (Task 1) to the left or right. |
Finish to Start (FS):![]() Start to Start (SS): ![]() Start to Finish (SF): ![]() Finish to Finish (FF): ![]() |
The UI component moves a successor task (Task 2) forward or backward to the same time interval. |
Move a successor task (Task 2) to the left. |
Finish to Start (FS):![]() Start to Start (SS): ![]() Start to Finish (SF): ![]() Finish to Finish (FF): ![]() |
This change is denied as it violates dependency rules. The control displays a popup window and suggests the following actions:
|
Move a successor task (Task 2) to the right. |
Finish to Start (FS):![]() Start to Start (SS): ![]() Start to Finish (SF): ![]() Finish to Finish (FF): ![]() |
The control displays a popup window and suggests the following actions:
|