InkAnalyzerBase.ContextNodeDeletingBase Event
Occurs before the ink analyzer deletes a ContextNodeBase.
Assembly: IACore (in IACore.dll)
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 deletes a ContextNodeBase.
Before the ink analyzer deletes a context node, the analyzer removes all of the strokes from the context node and removes all of the links to other context nodes. Before the context node is removed, the InkAnalyzerBase may raise the following events.
The StrokesReparentedBase event when it moves a stroke from the ContextNodeBase.
The ContextNodeLinkDeletingBase event before it removes a ContextLinkBase from the context node.
The ContextNodeDeletingBase event before it removes a parent context node that no longer has child nodes.
For more information about synchronizing your application data with the InkAnalyzerBase, see Data Proxy with Ink Analysis.
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
The following example defines the method, RemoveContextNodeBase, that handles the ContextNodeDeletingBase 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.ContextNodeDeletingBase event. ''' </summary> ''' <param name="sender">The source of the event.</param> ''' <param name="e">The event data.</param> Private Sub RemoveContextNodeBase( _ ByVal sender As Object, _ ByVal e As System.Windows.Ink.AnalysisCore.ContextNodeDeletingBaseEventArgs) ' Do not remove unclassified ink nodes from the document model. If System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.UnclassifiedInk <> e.NodeToBeDeleted.Type Then Me.baseDocumentModel.RemoveNode(e.NodeToBeDeleted) End If End Sub 'RemoveContextNodeBase
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.