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InkAnalyzer.ContextNodeCreated Event

Occurs after the InkAnalyzer creates a ContextNode.

Namespace:  System.Windows.Ink
Assembly:  IAWinFX (in IAWinFX.dll)

public event ContextNodeCreatedEventHandler ContextNodeCreated

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

When the InkAnalyzer creates a ContextNode, the new ContextNode does not contain any strokes or links to other ContextNode objects, and may not have all of its properties set. Also, the new ContextNode is added to the end of its parent's SubNodes collection.

After this event, the InkAnalyzer may raise the following subsequent events.

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

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

		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 a method, AddContextNode, that handles the ContextNodeCreated event. The event information is passed to the document model object named 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.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);
			}
		}

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.

.NET Framework

Supported in: 3.0

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