Evento InkAnalyzer.ContextNodeDeleting

Articolo
10/29/2008

Aggiornamento: novembre 2007

Si verifica prima che l'oggetto InkAnalyzer elimina un oggetto ContextNode.

Spazio dei nomi: Microsoft.Ink
Assembly: Microsoft.Ink.Analysis (in Microsoft.Ink.Analysis.dll)

Sintassi

'Dichiarazione
Public Event ContextNodeDeleting As ContextNodeDeletingEventHandler
'Utilizzo
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 non supporta gli eventi.

Note

Utilizzare questo evento nel caso in cui l'applicazione gestisce una struttura di dati personalizzata, sincronizzata con quella dell'oggetto InkAnalyzer. Questo evento si verifica durante la fase di risoluzione delle differenze dell'analisi dell'input penna o in risposta a un metodo InkAnalyzer che elimina un oggetto ContextNode.

Prima che l'oggetto InkAnalyzer elimina un oggetto ContextNode, InkAnalyzer rimuove tutti i tratti da ContextNode e tutti i collegamenti ad altri oggetti ContextNode. Prima della rimozione di ContextNode, l'oggetto InkAnalyzer può generare gli eventi seguenti.

L'evento StrokesReparented, in caso di spostamento di un tratto dall'oggetto ContextNode.
L'evento ContextNodeLinkDeleting, prima della rimozione di un oggetto ContextLink da ContextNode.

Per ulteriori informazioni sulla sincronizzazione dei dati applicazioni con InkAnalyzer, vedere Data Proxy with Ink Analysis.

Esempi

In questo esempio viene definito un metodo, AttachDataProxyEventHandlers, che associa i gestori eventi del proxy di dati a un oggetto InkAnalyzer, 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.ReparentStroke
    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 Microsoft.Ink.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 Microsoft.Ink.ContextNodeCreatedEventHandler(
                    this.AddContextNode);
            this.theInkAnalyzer.ContextNodeDeleting +=
                new Microsoft.Ink.ContextNodeDeletingEventHandler(
                    this.RemoveContextNode);
            this.theInkAnalyzer.ContextNodeLinkAdding +=
                new Microsoft.Ink.ContextNodeLinkAddingEventHandler(
                    this.AddContextNodeLink);
            this.theInkAnalyzer.ContextNodeLinkDeleting +=
                new Microsoft.Ink.ContextNodeLinkDeletingEventHandler(
                    this.RemoveContextNodeLink);
            this.theInkAnalyzer.ContextNodeMovingToPosition +=
                new Microsoft.Ink.ContextNodeMovingToPositionEventHandler(
                    this.MoveContextNodeToPosition);
            this.theInkAnalyzer.ContextNodePropertiesUpdated +=
                new Microsoft.Ink.ContextNodePropertiesUpdatedEventHandler(
                    this.UpdateContextNodeProperties);
            this.theInkAnalyzer.ContextNodeReparenting +=
                new Microsoft.Ink.ContextNodeReparentingEventHandler(
                    this.ReparentContextNode);
            this.theInkAnalyzer.InkAnalyzerStateChanging +=
                new Microsoft.Ink.InkAnalyzerStateChangingEventHandler(
                    this.InkAnalyzer_StateChanging);
            this.theInkAnalyzer.StrokesReparented +=
                new Microsoft.Ink.StrokesReparentedEventHandler(
                    this.ReparentStrokes);
            this.theInkAnalyzer.IntermediateResultsUpdated +=
                new Microsoft.Ink.ResultsUpdatedEventHandler(
                    this.ResultsAvailable);
            this.theInkAnalyzer.ResultsUpdated +=
                new Microsoft.Ink.ResultsUpdatedEventHandler(
                    this.ResultsAvailable);
        }

Nell'esempio seguente viene definito il metodo, RemoveContextNode, che gestisce l'evento ContextNodeDeleting. Le informazioni relative all’evento vengono passate all’oggetto modello di documento, theDocumentModel.

In questo esempio non viene fornita la definizione del modello di documento né viene illustrato come vengono elaborate le informazioni passate a tale modello.

'/ <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 Microsoft.Ink.ContextNodeDeletingEventArgs)

    ' Do not remove unclassified ink nodes from the document model.
    If Microsoft.Ink.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, Microsoft.Ink.ContextNodeDeletingEventArgs e)
        {
            // Do not remove unclassified ink nodes from the document model.
            if (Microsoft.Ink.ContextNodeType.UnclassifiedInk
                != e.NodeToBeDeleted.Type)
            {
                this.theDocumentModel.RemoveNode(e.NodeToBeDeleted);
            }
        }

Piattaforme

Windows Vista

.NET Framework e .NET Compact Framework non supportano tutte le versioni di ciascuna piattaforma. Per un elenco delle versioni supportate, vedere Requisiti di sistema di .NET Framework.