InkAnalyzer.ContextNodeCreated 事件

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

語法

'宣告
Public Event ContextNodeCreated As ContextNodeCreatedEventHandler
'用途
Dim instance As InkAnalyzer
Dim handler As ContextNodeCreatedEventHandler

AddHandler instance.ContextNodeCreated, handler

public event ContextNodeCreatedEventHandler ContextNodeCreated

public:
 event ContextNodeCreatedEventHandler^ ContextNodeCreated {
    void add (ContextNodeCreatedEventHandler^ value);
    void remove (ContextNodeCreatedEventHandler^ value);
}

/** @event */
public void add_ContextNodeCreated (ContextNodeCreatedEventHandler value)
/** @event */
public void remove_ContextNodeCreated (ContextNodeCreatedEventHandler 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，且該資料結構與 InkAnalyzer 的資料結構同步處理時，請使用這個事件。這個事件會在筆墨分析的協調階段，或是回應建立 ContextNode 的 InkAnalyzer 方法時發生。

當 InkAnalyzer 建立 ContextNode 時，新的 ContextNode 不會包含任何筆劃或其他 ContextNode 物件的連結，也不會包含其所有屬性集。同時，新的 ContextNode 會加入至其父代 SubNodes 集合的結尾。

在這個事件之後，InkAnalyzer 可能會引發下列後續事件。

將筆劃從某個 ContextNode 移到另一個時，就會引發的 StrokesReparented 事件。
將 ContextLink 加入至 ContextNode 時，就會引發的 ContextNodeLinkAdding 事件。
變更 ContextNode 物件在其父代之 SubNodes 集合中的順序時，就會引發的 ContextNodeMovingToPosition 事件。
針對這個分析階段解析 ContextNode 的狀態之後，就會引發的 ContextNodePropertiesUpdated 事件。

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

範例

這個範例會定義 AttachDataProxyEventHandlers 方法，該方法會將資料 Proxy 事件處理常式附加至名為 theInkAnalyzer 的 InkAnalyzer。

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);
        }

下列範例會定義用來處理 ContextNodeCreated 事件的 AddContextNode 方法。事件資訊會傳遞至名為 theDocumentModel 的文件模型物件。

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 InkAnalyzer.ContextNodeCreated event.
'/ </summary>
'/ <param name="sender">The source of the event.</param>
'/ <param name="e">The event data.</param>
'/ <remarks>
'/ Note: when this event is fired, the ContextNode has not been populated
'/ with extended and other properties. Handle the ContextNodePropertiesUpdated
'/ event to populate the corresponding ContextNode in the document model.
'/ </remarks>
Private Sub AddContextNode(ByVal sender As Object, ByVal e As ContextNodeCreatedEventArgs) 
    ' Do not add unclassified ink nodes to the document model.
    If ContextNodeType.UnclassifiedInk <> e.NodeCreated.Type Then
        Me.theDocumentModel.AddNode(e.NodeCreated)
    End If

End Sub 'AddContextNode

        /// <summary>
        /// Handles the InkAnalyzer.ContextNodeCreated event.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The event data.</param>
        /// <remarks>
        /// Note: when this event is fired, the ContextNode has not been populated
        /// with extended and other properties. Handle the ContextNodePropertiesUpdated
        /// event to populate the corresponding ContextNode in the document model.
        /// </remarks>
        private void AddContextNode(
            object sender, ContextNodeCreatedEventArgs e)
        {
            // Do not add unclassified ink nodes to the document model.
            if (ContextNodeType.UnclassifiedInk
                != e.NodeCreated.Type)
            {
                this.theDocumentModel.AddNode(e.NodeCreated);
            }
        }