DiagramControl.BeforeItemsMoving Event

Raises each time the end-user attempts to move a diagram item.

Namespace: DevExpress.XtraDiagram

Assembly: DevExpress.XtraDiagram.v23.2.dll

NuGet Package: DevExpress.Win.Diagram

Declaration

C#

[DiagramCategory(DiagramCategory.DiagramItems)]
public event EventHandler<DiagramBeforeItemsMovingEventArgs> BeforeItemsMoving

VB.NET

<DiagramCategory(DiagramCategory.DiagramItems)>
Public Event BeforeItemsMoving As EventHandler(Of DiagramBeforeItemsMovingEventArgs)

Event Data

The BeforeItemsMoving event's data class is DiagramBeforeItemsMovingEventArgs. 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.
Cancel	Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs.
IsCopying	Indicates whether the user attempts to copy diagram items by holding Ctrl.
Items	Returns the collection of diagram items that are being moved.

Remarks

The event’s Items property returns the items that are about to be moved. The ActionSource property indicates whether the moving operation is performed using drag-and-drop or pressing key shortcuts. The IsCopying property returns true when the end-user attempts to move items while holding the CTRL key which results in items being copied.

Related GitHub Examples

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

C#

winforms-diagram-track-and-restrict-drag-actions/CS/WinApp7/Form1.cs#L16

diagramControl1.AddingNewItem += DiagramControl1_AddingNewItem;
diagramControl1.BeforeItemsMoving += DiagramControl1_BeforeItemsMoving;
diagramControl1.ItemsMoving += DiagramControl1_ItemsMoving;