InkAnalyzer.ContextNodeDeleting, événement

Article
11/05/2008

Mise à jour : November 2007

Se produit avant que le InkAnalyzer ne supprime un ContextNode.

Espace de noms : System.Windows.Ink
Assembly : IAWinFX (dans IAWinFX.dll)

Syntaxe

'Déclaration
Public Event ContextNodeDeleting As ContextNodeDeletingEventHandler
'Utilisation
Dim instance As InkAnalyzer
Dim handler As ContextNodeDeletingEventHandler

AddHandler instance.ContextNodeDeleting, handler

public event ContextNodeDeletingEventHandler ContextNodeDeleting

public:
 event ContextNodeDeletingEventHandler^ ContextNodeDeleting {
    void add (ContextNodeDeletingEventHandler^ value);
    void remove (ContextNodeDeletingEventHandler^ value);
}

/** @event */
public void add_ContextNodeDeleting (ContextNodeDeletingEventHandler value)
/** @event */
public void remove_ContextNodeDeleting (ContextNodeDeletingEventHandler value)

JScript ne prend pas en charge les événements.

Notes

Utilisez cet événement lorsque votre application gère sa propre structure de données, synchronisée avec celle du InkAnalyzer. Cet événement se produit pendant la phase de rapprochement de l'analyse d'entrée manuscrite ou si une méthode InkAnalyzer supprime un ContextNode.

Avant que le InkAnalyzer ne supprime un ContextNode, le InkAnalyzer supprime tous les traits du ContextNode ainsi que tous les liens vers d'autres objets ContextNode. Avant que le ContextNode ne soit supprimé, InkAnalyzer peut déclencher les événements suivants.

Événement StrokesReparented, lors du déplacement d'un trait à partir du ContextNode.
Événement ContextNodeLinkDeleting, avant la suppression d'un ContextLink du ContextNode.

Pour plus d'informations sur la synchronisation des données d'application avec le InkAnalyzer, consultez Data Proxy with Ink Analysis.

Exemples

Cet exemple définit une méthode, AttachDataProxyEventHandlers, qui attache des gestionnaires d'événements du proxy de données à un InkAnalyzer nommé theInkAnalyzer.

Private Sub AttachDataProxyEventHandlers() 
    ' If the document model supports on demand data proxy, then add an
    ' event handler for the PopulateContextNode event. This event is raised
    ' when the InkAnalyzer accesses a partially populated ContextNode created
    ' by the document model.
    If Me.theDocumentModel.SupportsOnDemandDataProxy Then
        AddHandler Me.theInkAnalyzer.PopulateContextNode, AddressOf Me.PopulateContextNode
    End If

    ' Add the other data proxy related event handlers. These events are raised
    ' by the InkAnalyzer to communicate ink analysis results to the document model.
    AddHandler Me.theInkAnalyzer.ContextNodeCreated, AddressOf Me.AddContextNode
    AddHandler Me.theInkAnalyzer.ContextNodeDeleting, AddressOf Me.RemoveContextNode
    AddHandler Me.theInkAnalyzer.ContextNodeLinkAdding, AddressOf Me.AddContextNodeLink
    AddHandler Me.theInkAnalyzer.ContextNodeLinkDeleting, AddressOf Me.RemoveContextNodeLink
    AddHandler Me.theInkAnalyzer.ContextNodeMovingToPosition, AddressOf Me.MoveContextNodeToPosition
    AddHandler Me.theInkAnalyzer.ContextNodePropertiesUpdated, AddressOf Me.UpdateContextNodeProperties
    AddHandler Me.theInkAnalyzer.ContextNodeReparenting, AddressOf Me.ReparentContextNode
    AddHandler Me.theInkAnalyzer.InkAnalyzerStateChanging, AddressOf Me.InkAnalyzer_StateChanging
    AddHandler Me.theInkAnalyzer.StrokesReparented, AddressOf Me.ReparentStrokes
    AddHandler Me.theInkAnalyzer.IntermediateResultsUpdated, AddressOf Me.ResultsAvailable
    AddHandler Me.theInkAnalyzer.ResultsUpdated, AddressOf Me.ResultsAvailable

End Sub 'AttachDataProxyEventHandlers

        private void AttachDataProxyEventHandlers()
        {
            // If the document model supports on demand data proxy, then add an
            // event handler for the PopulateContextNode event. This event is raised
            // when the InkAnalyzer accesses a partially populated ContextNode created
            // by the document model.
            if (this.theDocumentModel.SupportsOnDemandDataProxy)
            {
                this.theInkAnalyzer.PopulateContextNode +=
                    new PopulateContextNodeEventHandler(
                        this.PopulateContextNode);
            }

            // Add the other data proxy related event handlers. These events are raised
            // by the InkAnalyzer to communicate ink analysis results to the document model.
            this.theInkAnalyzer.ContextNodeCreated +=
                new ContextNodeCreatedEventHandler(
                    this.AddContextNode);
            this.theInkAnalyzer.ContextNodeDeleting +=
                new ContextNodeDeletingEventHandler(
                    this.RemoveContextNode);
            this.theInkAnalyzer.ContextNodeLinkAdding +=
                new ContextNodeLinkAddingEventHandler(
                    this.AddContextNodeLink);
            this.theInkAnalyzer.ContextNodeLinkDeleting +=
                new ContextNodeLinkDeletingEventHandler(
                    this.RemoveContextNodeLink);
            this.theInkAnalyzer.ContextNodeMovingToPosition +=
                new ContextNodeMovingToPositionEventHandler(
                    this.MoveContextNodeToPosition);
            this.theInkAnalyzer.ContextNodePropertiesUpdated +=
                new ContextNodePropertiesUpdatedEventHandler(
                    this.UpdateContextNodeProperties);
            this.theInkAnalyzer.ContextNodeReparenting +=
                new ContextNodeReparentingEventHandler(
                    this.ReparentContextNode);
            this.theInkAnalyzer.InkAnalyzerStateChanging +=
                new InkAnalyzerStateChangingEventHandler(
                    this.InkAnalyzer_StateChanging);
            this.theInkAnalyzer.StrokesReparented +=
                new StrokesReparentedEventHandler(
                    this.ReparentStrokes);
            this.theInkAnalyzer.IntermediateResultsUpdated +=
                new ResultsUpdatedEventHandler(
                    this.ResultsAvailable);
            this.theInkAnalyzer.ResultsUpdated +=
                new ResultsUpdatedEventHandler(
                    this.ResultsAvailable);
        }

L'exemple suivant définit la méthode RemoveContextNode, qui gère l'événement ContextNodeDeleting. Les informations sur l'événement sont passées à l'objet de modèle de document theDocumentModel.

Cet exemple ne fournit pas la définition du modèle de document et ne montre pas comment traiter les informations qui lui sont passées.

'/ <summary>
'/ Handles the InkAnalyzer.ContextNodeDeleting event.
'/ </summary>
'/ <param name="sender">The source of the event.</param>
'/ <param name="e">The event data.</param>
Private Sub RemoveContextNode(ByVal sender As Object, ByVal e As ContextNodeDeletingEventArgs) 
    ' Do not remove unclassified ink nodes from the document model.
    If ContextNodeType.UnclassifiedInk <> e.NodeToBeDeleted.Type Then
        Me.theDocumentModel.RemoveNode(e.NodeToBeDeleted)
    End If

End Sub 'RemoveContextNode

        /// <summary>
        /// Handles the InkAnalyzer.ContextNodeDeleting event.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The event data.</param>
        private void RemoveContextNode(
            object sender, ContextNodeDeletingEventArgs e)
        {
            // Do not remove unclassified ink nodes from the document model.
            if (ContextNodeType.UnclassifiedInk
                != e.NodeToBeDeleted.Type)
            {
                this.theDocumentModel.RemoveNode(e.NodeToBeDeleted);
            }
        }

Plateformes

Windows Vista

Le .NET Framework et le .NET Compact Framework ne prennent pas en charge toutes les versions de chaque plateforme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise du .NET Framework.