DiagramControl.ItemBoundsChanged Event

Fires each time an item’s bounds are changed.

Namespace: DevExpress.Xpf.Diagram

Assembly: DevExpress.Xpf.Diagram.v24.1.dll

NuGet Package: DevExpress.Wpf.Diagram

Declaration

C#

public event EventHandler<DiagramItemBoundsChangedEventArgs> ItemBoundsChanged

VB.NET

Public Event ItemBoundsChanged As EventHandler(Of DiagramItemBoundsChangedEventArgs)

Event Data

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

Property	Description
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.
Item	Returns the item whose bounds are changed.
NewAngle	Returns the new angle at which the item is rotated.
NewIndex	Gets the new item’s index within the Items collection of its parent.
NewParent	Returns the item’s new parent.
NewPosition	Returns the new coordinates of the item’s upper left corner.
NewSize	Gets the new size of the item.
OldAngle	Returns the angle at which the item was previously rotated.
OldIndex	Gets the previous item’s index within the Items collection of its parent.
OldParent	Returns the item’s previous parent.
OldPosition	Returns the previous coordinates of the item’s upper left corner.
OldSize	Gets the previous size of the item.
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 Item event’s parameter returns the item whose bounds are changed.

Related GitHub Examples

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

wpf-generate-diagram-with-grouped-items/VB/DiagramNestedItemsExample/StackLayoutDiagramContainerBehavior.vb#L36

Private Sub AttachToDiagram()
    AddHandler Diagram.ItemBoundsChanged, AddressOf OnDiagramItemBoundsChanged
    AddHandler Diagram.ItemsResizing, AddressOf OnDiagramItemsResizing