DiagramControl.ItemsMoving Event

Fires as the end-user is moving diagram items.

Namespace: DevExpress.Xpf.Diagram

Assembly: DevExpress.Xpf.Diagram.v23.2.dll

NuGet Package: DevExpress.Wpf.Diagram

Declaration

C#

public event EventHandler<DiagramItemsMovingEventArgs> ItemsMoving

VB.NET

Public Event ItemsMoving As EventHandler(Of DiagramItemsMovingEventArgs)

Event Data

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

Property	Description
ActionSource	Indicates whether the moving operation is performed using drag-and-drop, the Properties Panel or by pressing key shortcuts.
Allow	Specifies whether to allow performing the operation.
Cancel	Gets or sets whether the event should be canceled. Inherited from CancelRoutedEventArgs.
Handled	Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
Items	Returns the data about items that are being moved.
OriginalSource	Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent	Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Source	Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.
Stage	Indicates whether the moving operation has just started, is continuing or has been finished or canceled.

The event data class exposes the following methods:

Method	Description
InvokeEventHandler(Delegate, Object)	When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object)	When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.

Remarks

The event’s Items property returns the items that are being moved. The ActionSource property indicates whether the moving operation is performed using drag-and-drop or pressing key shortcuts. The Stage property indicates whether the moving operation has just started, is continuing or has been finished or canceled.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the ItemsMoving event.

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.

XAML

wpf-diagram-track-and-restrict-drag-actions/CS/WpfApp7/MainWindow.xaml#L21

        BeforeItemsMoving="DiagramDesignerControl_BeforeItemsMoving"
        ItemsMoving="DiagramDesignerControl_ItemsMoving"/>
</Grid>