DiagramControl.BeforeItemsRotating Event

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

Namespace: DevExpress.Xpf.Diagram

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

NuGet Package: DevExpress.Wpf.Diagram

Declaration

C#

public event EventHandler<DiagramBeforeItemsRotatingEventArgs> BeforeItemsRotating

VB.NET

Public Event BeforeItemsRotating As EventHandler(Of DiagramBeforeItemsRotatingEventArgs)

Event Data

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

Property	Description
ActionSource	Indicates whether the rotating operation is performed using the rotation handle or the Properties Panel.
Cancel	Gets or sets whether the event should be canceled. Inherited from CancelRoutedEventArgs.
CenterOfRotation	Returns the coordinates of the center of rotation.
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	A collection of items that are being rotated.
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.

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 ActionSource property indicates whether the rotating operation is performed using mouse or pressing key shortcuts. The CenterOfRotation property returns the rotation center point.