GanttControlOptionsCustomization.AllowModifyDependencies Property

Gets or sets whether users can modify dependencies between tasks in the chart: change a predecessor or successor of a task, create new dependencies.

Namespace: DevExpress.XtraGantt.Options

Assembly: DevExpress.XtraGantt.v21.2.dll

NuGet Packages: DevExpress.Win.Design, DevExpress.Win.Gantt

Declaration

C#

[DefaultValue(DefaultBoolean.Default)]
[XtraSerializableProperty]
public DefaultBoolean AllowModifyDependencies { get; set; }

VB.NET

<XtraSerializableProperty>
<DefaultValue(DefaultBoolean.Default)>
Public Property AllowModifyDependencies As DefaultBoolean

Property Value

Type	Default	Description
DefaultBoolean	Default	True, if users can modify dependencies; otherwise, Default or False.

Available values:

Name	Description
True	true. DefaultBoolean.True has a constant value of 0, while the standard true value corresponds to a value of 1. In Visual Basic, do not use implicit conversion of Boolean values to DefaultBoolean, and vice versa, as the conversion may produce incorrect results.
False	false. DefaultBoolean.False has a constant value of 1, while the standard false value corresponds to a value of 0. In Visual Basic, do not use implicit conversion of Boolean values to DefaultBoolean, and vice versa, as the conversion may produce incorrect results.
Default	The default behavior determined by the control’s logic.

Property Paths

You can access this nested property as listed below:

Object Type	Path to AllowModifyDependencies
GanttControl	.OptionsCustomization .AllowModifyDependencies

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.