DiagramBase.NodeCreating Event

A validation event raised while the user is drawing a new node.

Namespace: MindFusion.Diagramming.Wpf
Assembly: MindFusion.Diagramming.Wpf

 Syntax

C#

public event EventHandler<NodeValidationEventArgs> NodeCreating

Visual Basic

Public Event NodeCreating As EventHandler(Of NodeValidationEventArgs)

 Event Data

NodeCreating event handlers receive an argument of type NodeValidationEventArgs. The following NodeValidationEventArgs members provide information relevant to the event:

Member name	Description
Node	The DiagramNode that is being created.
MousePosition	A Point specifying the mouse cursor position.
Cancel	Set this property to true to prevent the user from creating the node at the current location. That displays the Stop mouse cursor and releasing the button will cancel the operation.
CancelDrag	Call this method to immediately stop the node creation.

 Remarks

NodeCreating is raised after each mouse movement while drawing a new node. Setting Cancel to true will change the mouse cursor to DisallowCursor (a Stop icon by default). The event is raised once again when the mouse button is released. Setting Cancel to true in that case will cancel the node creation.