InkAnalyzerBase.InkAnalyzerStateChangingBase Event

Article
12/08/2012

Occurs before the ink analyzer reconciles analysis results so that an application can synchronize data with the ink analyzer.

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

Syntax

'Declaration
Public Event InkAnalyzerStateChangingBase As InkAnalyzerStateChangingBaseEventHandler
'Usage
Dim instance As InkAnalyzerBase 
Dim handler As InkAnalyzerStateChangingBaseEventHandler 

AddHandler instance.InkAnalyzerStateChangingBase, handler

public event InkAnalyzerStateChangingBaseEventHandler InkAnalyzerStateChangingBase

public:
 event InkAnalyzerStateChangingBaseEventHandler^ InkAnalyzerStateChangingBase {
    void add (InkAnalyzerStateChangingBaseEventHandler^ value);
    void remove (InkAnalyzerStateChangingBaseEventHandler^ 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. When the ink analyzer raises this event, your application should populate the SubNodes property of the InkAnalyzerBase object's RootNode.

The ink analyzer raises this event after it raises the ReadyToReconcileBase event. It raises this event only while performing background analysis.

Lock your data structure when the ink analyzer raises the InkAnalyzerStateChangingBase event. Changes to your data structure during this phase of analysis can cause errors in ink analysis and synchronization. Unlock your data structure when the ink analyzer raises the IntermediateResultsUpdatedBase or ResultsUpdatedBase event.

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 the method, InkAnalyzerBase_StateChanging, that handles the InkAnalyzerStateChangingBase 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.InkAnalyzerStateChangingBase event. 
''' </summary> 
''' <param name="sender">The source of the event.</param> 
''' <param name="e">The event data.</param> 
Private Sub InkAnalyzerBase_StateChanging( _
    ByVal sender As Object, ByVal e As System.EventArgs)

    Me.baseDocumentModel.BeginReconcilePhase()

End Sub 'InkAnalyzerBase_StateChanging

/// <summary> 
/// Handles the InkAnalyzerBase.InkAnalyzerStateChangingBase event. 
/// </summary> 
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event data.</param>
private void InkAnalyzerBase_StateChanging(
    object sender, System.EventArgs e)
{
    this.baseDocumentModel.BeginReconcilePhase();
}

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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