windowsforms-devexpress-dot-xtragantt-dot-options-dot-ganttcontroloptionscustomization.md
Gets or sets whether users can modify a task’s start and finish dates in the chart: resize its bounds or move it to a new time slot.
Namespace : DevExpress.XtraGantt.Options
Assembly : DevExpress.XtraGantt.v25.2.dll
NuGet Package : DevExpress.Win.Gantt
[DefaultValue(DefaultBoolean.Default)]
[XtraSerializableProperty]
public DefaultBoolean AllowModifyTasks { get; set; }
<XtraSerializableProperty>
<DefaultValue(DefaultBoolean.Default)>
Public Property AllowModifyTasks As DefaultBoolean
| Type | Default | Description |
|---|---|---|
| DefaultBoolean | Default |
True, if users can modify a task’s start and finish dates; otherwise, Default or False.
|
Available values:
| Name | Description | Return Value |
|---|---|---|
| True |
The value is true.
|
0
| | False |
The value is false.
|
1
| | Default |
The value is specified by a global option or a higher-level object.
|
2
|
You can access this nested property as listed below:
| Object Type | Path to AllowModifyTasks |
|---|---|
| GanttControl |
.OptionsCustomization .AllowModifyTasks
|
If the AllowModifyTasks option is enabled, users can reschedule a task. Users can use the mouse pointer to resize its duration or drag it to a new time slot.
To resize a task, move the mouse pointer over a task’s edge.
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:
TaskMoveStarted — fires when a user starts to move a task.
TaskMoving — repeatedly fires when a user moves a task.
TaskMoveCanceled — fires when a user presses Esc to cancel the operation.
TaskMoveCompleted — fires when a user finishes moving a task. Allows you to cancel the operation.
TaskMoved — fires when a task is successfully moved.
TaskFinishDateModificationStarted — fires when a user starts to modify a task’s finish date.
TaskFinishDateModification — repeatedly fires when a user modifies a task’s finish date.
TaskFinishDateModificationCanceled — fires when a user presses Esc to cancel the operation.
TaskFinishDateModificationCompleted — fires when a user finishes to modify a finish date. Allows you to cancel the operation.
TaskFinishDateModified — fires when a task’s finish date is successfully modified.
See Interactive Editing for more information.
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the AllowModifyTasks property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
xaf-win-gantt-control/CS/XPO/GanttSolutionXPO/GanttSolutionXPO.Win/Editors/CustomGanttEditor.cs#L86
control.OptionsBehavior.ScheduleMode = DevExpress.XtraGantt.Options.ScheduleMode.Auto;
control.OptionsCustomization.AllowModifyTasks = DevExpress.Utils.DefaultBoolean.True;
control.OptionsCustomization.AllowModifyDependencies = DevExpress.Utils.DefaultBoolean.True;
See Also
GanttControlOptionsCustomization Class