DiagramControl.BeforeItemsResizing Event

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

Namespace: DevExpress.Xpf.Diagram

Assembly: DevExpress.Xpf.Diagram.v20.2.dll

NuGet Packages: DevExpress.WindowsDesktop.Wpf.Diagram, DevExpress.Wpf.Diagram

Declaration

C#

public event EventHandler<DiagramBeforeItemsResizingEventArgs> BeforeItemsResizing

VB.NET

Public Event BeforeItemsResizing As EventHandler(Of DiagramBeforeItemsResizingEventArgs)

Event Data

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

Property	Description
ActionSource	Indicates whether the resizing operation is performed using the selection handles or the Properties Panel.
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 collection of items that are being resized.
Mode	Indicates the direction of resizing.
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 event’s parameter indicates whether the resizing operation is performed using drag-and-drop or pressing key shortcuts. The Mode property indicates the direction of resizing.