InkAnalyzerBase.ContextNodeDeletingBase 事件

發行項
10/29/2008

在筆墨分析器刪除 ContextNodeBase 之前發生。

命名空間： System.Windows.Ink.AnalysisCore
組件： IACore (在 IACore.dll 中)

語法

'宣告
Public Event ContextNodeDeletingBase As ContextNodeDeletingBaseEventHandler
'用途
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 不支援事件。

備註

當您的應用程式維護本身的資料結構時使用這個事件，該資料結構會與 InkAnalyzerBase 的資料結構同步處理。這個事件會在筆墨分析的協調階段，或是回應刪除 ContextNodeBase 的筆墨分析器方法時發生。

在筆墨分析器刪除內容節點之前，分析器會從內容節點移除所有筆劃，並且移除其他內容節點的所有連結。在移除內容節點之前，InkAnalyzerBase 會引發下列事件。

從 ContextNodeBase 移動筆劃時，會引發 StrokesReparentedBase 事件。
從內容節點移除 ContextLinkBase 之前，會引發 ContextNodeLinkDeletingBase 事件。
在移除不再有子節點的父代內容節點之前，會引發 ContextNodeDeletingBase 事件。

如需將應用程式資料與 InkAnalyzerBase 進行同步處理的詳細資訊，請參閱Data Proxy with Ink Analysis。

範例

下列範例會定義 AttachDataProxyEventHandlers 方法，將資料 Proxy 事件處理常式附加至 InkAnalyzerBase，也就是 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);
        }

下列範例會定義用來處理 ContextNodeDeletingBase 事件的 RemoveContextNodeBase 方法。事件資訊會傳遞至 baseDocumentModel 文件模型物件。

這個範例並未提供文件模型的定義，也未示範處理傳入資訊的方式。

''' <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);
            }
        }