InkAnalyzer.PopulateContextNode Event

Articolo
12/12/2007

Occurs before the InkAnalyzer performs analysis within the region of a partially populated ContextNode.

Namespace: System.Windows.Ink
Assembly: IAWinFX (in iawinfx.dll)
XML Namespace: https://schemas.microsoft.com/winfx/2006/xaml/presentation

Syntax

'Declaration
Public Event PopulateContextNode As PopulateContextNodeEventHandler
'Usage
Dim instance As InkAnalyzer
Dim handler As PopulateContextNodeEventHandler

AddHandler instance.PopulateContextNode, handler

public event PopulateContextNodeEventHandler PopulateContextNode

public:
event PopulateContextNodeEventHandler^ PopulateContextNode {
    void add (PopulateContextNodeEventHandler^ value);
    void remove (PopulateContextNodeEventHandler^ value);
}

/** @event */
public void add_PopulateContextNode (PopulateContextNodeEventHandler value)

/** @event */
public void remove_PopulateContextNode (PopulateContextNodeEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.

Not applicable.

Remarks

Use this event when your application maintains its own data structure, which is synchronized with that of the InkAnalyzer. When the InkAnalyzer raises this event, your application should populate the PopulateContextNodeEventArgs.NodeToPopulate property. During the analysis phase, the InkAnalyzer raises this event to get information for areas in which it is analyzing ink.

If the document contains links for the NodeToPopulate property, your application should create and add these links. This process requires that both the source and destination nodes and their ancestors are fully populated before the event handler for this event exits.

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

During background analysis, the InkAnalyzer raises this event after it raises the InkAnalyzerStateChanging event.

Example

This example defines a method, AttachDataProxyEventHandlers, that attaches data proxy event handlers to an InkAnalyzer, theInkAnalyzer.

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);
}

The following example defines the method, PopulateContextNode, that handles the PopulateContextNode event. The event information is passed to the document model object, theDocumentModel.

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

'/ <summary>
'/ Handles the InkAnalyzer.PopulateContextNode event.
'/ </summary>
'/ <param name="sender">The source of the event.</param>
'/ <param name="e">The event data.</param>
'/ <remarks>
'/ This event handler fully populates a ContextNode from the document model.
'/ The InkAnalyzer calls this event handler when it accesses a partially
'/ populated ContextNode created by the document model.
'/ </remarks>
Private Sub PopulateContextNode(ByVal sender As Object, ByVal e As PopulateContextNodeEventArgs) 
    Me.theDocumentModel.PopulateNode(e.NodeToPopulate, CType(sender, InkAnalyzer))

End Sub 'PopulateContextNode

/// <summary>
/// Handles the InkAnalyzer.PopulateContextNode event.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event data.</param>
/// <remarks>
/// This event handler fully populates a ContextNode from the document model.
/// The InkAnalyzer calls this event handler when it accesses a partially
/// populated ContextNode created by the document model.
/// </remarks>
private void PopulateContextNode(
    object sender, PopulateContextNodeEventArgs e)
{
    this.theDocumentModel.PopulateNode(
        e.NodeToPopulate, (InkAnalyzer)sender);
}

Platforms

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

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