InkAnalyzerBase.ContextNodeCreatedBase Event

Article
10/20/2012

Occurs after the ink analyzer creates a ContextNodeBase.

Namespace: System.Windows.Ink.AnalysisCore
Assembly: IACore (in IACore.dll)

Syntax

'Declaration
Public Event ContextNodeCreatedBase As ContextNodeCreatedBaseEventHandler
'Usage
Dim instance As InkAnalyzerBase 
Dim handler As ContextNodeCreatedBaseEventHandler 

AddHandler instance.ContextNodeCreatedBase, handler

public event ContextNodeCreatedBaseEventHandler ContextNodeCreatedBase

public:
 event ContextNodeCreatedBaseEventHandler^ ContextNodeCreatedBase {
    void add (ContextNodeCreatedBaseEventHandler^ value);
    void remove (ContextNodeCreatedBaseEventHandler^ value);
}

JScript does not support events.

Remarks

Use this event when your application maintains its own data structure, which is synchronized with that of the InkAnalyzerBase. This event occurs during the reconcile phase of ink analysis, or in response to an ink analyzer method that creates a ContextNodeBase.

When the ink analyzer creates a context node, the new context node does not contain any strokes, does not contain links to other context nodes, and may not have all of its properties set. Also, the new context node is added to the end of its parent's SubNodes collection. After this event, the ink analyzer may raise the following events.

The StrokesReparentedBase event when it moves a stroke from one context node to another.
The ContextNodeLinkAddingBase event when it adds a ContextLinkBase to a context node.
The ContextNodeMovingToPositionBase event when it changes the order of a context node within its parent node's SubNodes collection.
The ink analyzer raises the ContextNodePropertiesUpdatedBase event after it resolves the state of the context node for this analysis phase.

For more information about synchronizing your application data with the InkAnalyzerBase, see Data Proxy with Ink Analysis.

Examples

The following example defines a method, AttachDataProxyEventHandlers, that attaches data proxy event handlers to an 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);
        }

The following example defines a method, AddContextNodeBase, that handles the ContextNodeCreatedBase event. The event information is passed to the document model object, baseDocumentModel.

This example does not provide the definition of the document model or demonstrate how it processes the information passed to it.

''' <summary> 
''' Handles the InkAnalyzerBase.ContextNodeCreatedBase 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 ContextNodeBase has not been populated 
''' with extended and other properties. Handle the ContextNodePropertiesUpdatedBase 
''' event to populate the corresponding ContextNodeBase in the document model. 
''' </remarks> 
Private Sub AddContextNodeBase( _
    ByVal sender As Object, _
    ByVal e As System.Windows.Ink.AnalysisCore.ContextNodeCreatedBaseEventArgs)

    ' Do not add unclassified ink nodes to the document model. 
    If System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.UnclassifiedInk <> e.NodeCreated.Type Then 
        Me.baseDocumentModel.AddNode(e.NodeCreated)
    End If 

End Sub 'AddContextNodeBase

        /// <summary> 
        /// Handles the InkAnalyzerBase.ContextNodeCreatedBase 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 ContextNodeBase has not been populated 
        /// with extended and other properties. Handle the ContextNodePropertiesUpdatedBase 
        /// event to populate the corresponding ContextNodeBase in the document model. 
        /// </remarks> 
        private void AddContextNodeBase(
            object sender, System.Windows.Ink.AnalysisCore.ContextNodeCreatedBaseEventArgs e)
        {
            // Do not add unclassified ink nodes to the document model. 
            if (System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.UnclassifiedInk
                != e.NodeCreated.Type)
            {
                this.baseDocumentModel.AddNode(e.NodeCreated);
            }
        }

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.0

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