InkAnalyzerBase.ContextNodeDeletingBase (Evento)

Artículo
10/28/2008

Actualización: noviembre 2007

Se produce antes de que el analizador de entrada manuscrita elimine un objeto ContextNodeBase.

Espacio de nombres: System.Windows.Ink.AnalysisCore
Ensamblado: IACore (en IACore.dll)

Sintaxis

'Declaración
Public Event ContextNodeDeletingBase As ContextNodeDeletingBaseEventHandler
'Uso
Dim instance As InkAnalyzerBase
Dim handler As ContextNodeDeletingBaseEventHandler

AddHandler instance.ContextNodeDeletingBase, handler

public event ContextNodeDeletingBaseEventHandler ContextNodeDeletingBase

public:
 event ContextNodeDeletingBaseEventHandler^ ContextNodeDeletingBase {
    void add (ContextNodeDeletingBaseEventHandler^ value);
    void remove (ContextNodeDeletingBaseEventHandler^ value);
}

/** @event */
public void add_ContextNodeDeletingBase (ContextNodeDeletingBaseEventHandler value)
/** @event */
public void remove_ContextNodeDeletingBase (ContextNodeDeletingBaseEventHandler value)

JScript no admite eventos.

Comentarios

Utilice este evento cuando la aplicación mantenga su propia estructura de datos, que está sincronizada con la del objeto InkAnalyzerBase. Este evento se produce durante la fase de conciliación del análisis de entrada manuscrita o en respuesta a un método del analizador de entrada manuscrita que elimina un objeto ContextNodeBase.

Antes de eliminar un nodo de contexto, el analizador de entrada manuscrita quita todos los trazos del nodo de contexto y quita todos los vínculos a otros nodos de contexto. Antes de que se quite el nodo de contexto, InkAnalyzerBase puede provocar los eventos siguientes.

El evento StrokesReparentedBase cuando mueve un trazo desde el objeto ContextNodeBase.
El evento ContextNodeLinkDeletingBase antes de quitar ContextLinkBase del nodo de contexto.
El evento ContextNodeDeletingBase antes de quitar un nodo de contexto primario que ya no tiene nodos secundarios.

Para obtener más información sobre la sincronización entre los datos de la aplicación y InkAnalyzerBase, vea Data Proxy with Ink Analysis.

Ejemplos

En el ejemplo siguiente se define un método, AttachDataProxyEventHandlers, que asocia los controladores de eventos del proxy de datos a un objeto InkAnalyzerBase, baseInkAnalyzer.

Private Sub AttachDataProxyEventHandlers()
    ' If the document model supports on demand data proxy, then add an
    ' event handler for the PopulateContextNodeBase event. This event is raised
    ' when the InkAnalyzerBase accesses a partially populated ContextNodeBase
    ' created by the document model.
    If Me.baseDocumentModel.SupportsOnDemandDataProxy Then
        AddHandler Me.baseInkAnalyzer.PopulateContextNodeBase, AddressOf Me.PopulateContextNodeBase
    End If

    ' Add the other data proxy related event handlers. These events are raised
    ' by the InkAnalyzer to communicate parsing results to the document model.
    AddHandler Me.baseInkAnalyzer.ContextNodeCreatedBase, _
        AddressOf Me.AddContextNodeBase
    AddHandler Me.baseInkAnalyzer.ContextNodeDeletingBase, _
        AddressOf Me.RemoveContextNodeBase
    AddHandler Me.baseInkAnalyzer.ContextNodeLinkAddingBase, _
        AddressOf Me.AddContextNodeLinkBase
    AddHandler Me.baseInkAnalyzer.ContextNodeLinkDeletingBase, _
        AddressOf Me.RemoveContextNodeLinkBase
    AddHandler Me.baseInkAnalyzer.ContextNodeMovingToPositionBase, _
        AddressOf Me.MoveContextNodeBaseToPosition
    AddHandler Me.baseInkAnalyzer.ContextNodePropertiesUpdatedBase, _
        AddressOf Me.UpdateContextNodeBaseProperties
    AddHandler Me.baseInkAnalyzer.ContextNodeReparentingBase, _
        AddressOf Me.ReparentContextNodeBase
    AddHandler Me.baseInkAnalyzer.InkAnalyzerStateChangingBase, _
        AddressOf Me.InkAnalyzerBase_StateChanging
    AddHandler Me.baseInkAnalyzer.StrokesReparentedBase, _
        AddressOf Me.ReparentStroke
    AddHandler Me.baseInkAnalyzer.IntermediateResultsUpdatedBase, _
        AddressOf Me.BaseResultsAvailable
    AddHandler Me.baseInkAnalyzer.ResultsUpdatedBase, _
        AddressOf Me.BaseResultsAvailable

End Sub 'AttachDataProxyEventHandlers

        private void AttachDataProxyEventHandlers()
        {
            // If the document model supports on demand data proxy, then add an
            // event handler for the PopulateContextNodeBase event. This event is raised
            // when the InkAnalyzerBase accesses a partially populated ContextNodeBase
            // created by the document model.
            if (this.baseDocumentModel.SupportsOnDemandDataProxy)
            {
                this.baseInkAnalyzer.PopulateContextNodeBase +=
                    new System.Windows.Ink.AnalysisCore.PopulateContextNodeBaseEventHandler(
                        this.PopulateContextNodeBase);
            }

            // Add the other data proxy related event handlers. These events are raised
            // by the InkAnalyzer to communicate parsing results to the document model.
            this.baseInkAnalyzer.ContextNodeCreatedBase +=
                new System.Windows.Ink.AnalysisCore.ContextNodeCreatedBaseEventHandler(
                    this.AddContextNodeBase);
            this.baseInkAnalyzer.ContextNodeDeletingBase +=
                new System.Windows.Ink.AnalysisCore.ContextNodeDeletingBaseEventHandler(
                    this.RemoveContextNodeBase);
            this.baseInkAnalyzer.ContextNodeLinkAddingBase +=
                new System.Windows.Ink.AnalysisCore.ContextNodeLinkAddingBaseEventHandler(
                    this.AddContextNodeLinkBase);
            this.baseInkAnalyzer.ContextNodeLinkDeletingBase +=
                new System.Windows.Ink.AnalysisCore.ContextNodeLinkDeletingBaseEventHandler(
                    this.RemoveContextNodeLinkBase);
            this.baseInkAnalyzer.ContextNodeMovingToPositionBase +=
                new System.Windows.Ink.AnalysisCore.ContextNodeMovingToPositionBaseEventHandler(
                    this.MoveContextNodeBaseToPosition);
            this.baseInkAnalyzer.ContextNodePropertiesUpdatedBase +=
                new System.Windows.Ink.AnalysisCore.ContextNodePropertiesUpdatedBaseEventHandler(
                    this.UpdateContextNodeBaseProperties);
            this.baseInkAnalyzer.ContextNodeReparentingBase +=
                new System.Windows.Ink.AnalysisCore.ContextNodeReparentingBaseEventHandler(
                    this.ReparentContextNodeBase);
            this.baseInkAnalyzer.InkAnalyzerStateChangingBase +=
                new System.Windows.Ink.AnalysisCore.InkAnalyzerStateChangingBaseEventHandler(
                    this.InkAnalyzerBase_StateChanging);
            this.baseInkAnalyzer.StrokesReparentedBase +=
                new System.Windows.Ink.AnalysisCore.StrokesReparentedBaseEventHandler(
                    this.ReparentStroke);
            this.baseInkAnalyzer.IntermediateResultsUpdatedBase +=
                new System.Windows.Ink.AnalysisCore.ResultsUpdatedBaseEventHandler(
                    this.BaseResultsAvailable);
            this.baseInkAnalyzer.ResultsUpdatedBase +=
                new System.Windows.Ink.AnalysisCore.ResultsUpdatedBaseEventHandler(
                    this.BaseResultsAvailable);
        }

En el ejemplo siguiente se define el método, RemoveContextNodeBase, que controla el evento ContextNodeDeletingBase. La información del evento se pasa al objeto del modelo de documento, baseDocumentModel.

En este ejemplo no se proporciona la definición del modelo de documento ni se muestra cómo procesa la información que se le pasa.

''' <summary>
''' Handles the InkAnalyzerBase.ContextNodeDeletingBase event.
''' </summary>
''' <param name="sender">The source of the event.</param>
''' <param name="e">The event data.</param>
Private Sub RemoveContextNodeBase( _
    ByVal sender As Object, _
    ByVal e As System.Windows.Ink.AnalysisCore.ContextNodeDeletingBaseEventArgs)

    ' Do not remove unclassified ink nodes from the document model.
    If System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.UnclassifiedInk <> e.NodeToBeDeleted.Type Then
        Me.baseDocumentModel.RemoveNode(e.NodeToBeDeleted)
    End If

End Sub 'RemoveContextNodeBase

        /// <summary>
        /// Handles the InkAnalyzerBase.ContextNodeDeletingBase event.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The event data.</param>
        private void RemoveContextNodeBase(
            object sender, System.Windows.Ink.AnalysisCore.ContextNodeDeletingBaseEventArgs e)
        {
            // Do not remove unclassified ink nodes from the document model.
            if (System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.UnclassifiedInk
                != e.NodeToBeDeleted.Type)
            {
                this.baseDocumentModel.RemoveNode(e.NodeToBeDeleted);
            }
        }

Plataformas

Windows Vista, Windows XP SP2, Windows Server 2003

.NET Framework y .NET Compact Framework no admiten todas las versiones de cada plataforma. Para obtener una lista de las versiones compatibles, vea Requisitos de sistema de .NET Framework.