InkAnalyzerBase.ContextNodeDeletingBase Event
Occurs before the ink analyzer deletes a ContextNodeBase.
Namespace: System.Windows.Ink.AnalysisCore
Assembly: IACore (in IACore.dll)
Syntax
'Declaration
Public Event ContextNodeDeletingBase As ContextNodeDeletingBaseEventHandler
'Usage
Dim instance As InkAnalyzerBase
Dim handler As ContextNodeDeletingBaseEventHandler
AddHandler instance.ContextNodeDeletingBase, handler
public event ContextNodeDeletingBaseEventHandler ContextNodeDeletingBase
public:
event ContextNodeDeletingBaseEventHandler^ ContextNodeDeletingBase {
void add (ContextNodeDeletingBaseEventHandler^ value);
void remove (ContextNodeDeletingBaseEventHandler^ 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 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.
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, 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
/// <summary>
/// Handles the InkAnalyzerBase.ContextNodeDeletingBase event.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event data.</param>
private void RemoveContextNodeBase(
object sender, System.Windows.Ink.AnalysisCore.ContextNodeDeletingBaseEventArgs e)
{
// Do not remove unclassified ink nodes from the document model.
if (System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.UnclassifiedInk
!= e.NodeToBeDeleted.Type)
{
this.baseDocumentModel.RemoveNode(e.NodeToBeDeleted);
}
}
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
See Also
Reference
System.Windows.Ink.AnalysisCore Namespace
InkAnalyzerBase.ContextNodeCreatedBase
InkAnalyzerBase.ContextNodeLinkAddingBase