GanttControl.TaskDependencyModificationCanceled Event

Fires when a user presses Esc to cancel modifying a task’s dependency. This event only fires when a user modifies a task in the chart. When the user modifies a task in the task list, the event does not fire.

Namespace: DevExpress.XtraGantt

Assembly: DevExpress.XtraGantt.v20.2.dll

NuGet Package: DevExpress.Win.Gantt

Declaration

C#

[DXCategory("Events")]
public event TaskDependencyModificationCanceledEventHandler TaskDependencyModificationCanceled

VB.NET

<DXCategory("Events")>
Public Event TaskDependencyModificationCanceled As TaskDependencyModificationCanceledEventHandler

Event Data

The TaskDependencyModificationCanceled event's data class is TaskDependencyModificationEventArgs. The following properties provide information specific to this event:

Property	Description
ChangeType	Gets the type of the operation.
OriginalSuccessorNode	Gets the processed dependency’s original (before the operation) successor node.
OriginalSuccessorTask	Gets the processed dependency’s original (before the operation) successor task.
PredecessorNode	Gets the processed dependency’s current (during the operation) predecessor node.
PredecessorTask	Gets the processed dependency’s current (during the operation) predecessor task.
SuccessorNode	Gets the processed dependency’s current (during the operation) successor node.
SuccessorTask	Gets the processed dependency’s current (during the operation) successor task.
Type	Gets the type of the processed dependency.

Remarks

If the AllowModifyDependencies option is enabled, users can change a task’s predecessor or successor. Users can remove a dependency or attach it to another task if the mouse pointer hovers over the dependency arrow. To create a new dependency, use pointers displayed at task edges.

Note

The Editable option must be enabled and the ReadOnly option must be disabled to allow users to modify tasks.

You can handle the following events to customize an operation:

• TaskDependencyModification — repeatedly fires when the user modifies a task’s dependency.
• TaskDependencyModificationCanceled — fires when the user presses Esc to cancel the operation.
• TaskDependencyModificationCompleted — fires when a user finishes modifying a dependency. Allows you to cancel the operation.
• TaskDependencyModified — fires when a task’s dependency is successfully modified.

See Interactive Editing for more information.