DiagramControl.ItemsResizing Event

Fires when a diagram item is resized by the end-user or programmatically.

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<DiagramItemsResizingEventArgs> ItemsResizing

VB.NET

Public Event ItemsResizing As EventHandler(Of DiagramItemsResizingEventArgs)

Event Data

The ItemsResizing event's data class is DiagramItemsResizingEventArgs. 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 data about 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.
Stage	Indicates whether the resizing 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 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.

Related GitHub Examples

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

VB.NET

How-to-generate-a-diagram-with-container-groups-using-DiagramDataBindingBehavior/VB/DiagramNestedItemsExample/StackLayoutDiagramContainerBehavior.vb#L37

AddHandler Diagram.ItemBoundsChanged, AddressOf OnDiagramItemBoundsChanged
AddHandler Diagram.ItemsResizing, AddressOf OnDiagramItemsResizing
Dim first As Boolean = True