ContextLink - класс

Статья
12/17/2008

Обновлен: Ноябрь 2007

Represents a relationship between two ContextNode objects that is not a parent-child relationship.

Пространство имен: System.Windows.Ink
Сборка: IAWinFX (в IAWinFX.dll)

Синтаксис

'Декларация
Public Class ContextLink
'Применение
Dim instance As ContextLink

public class ContextLink

public ref class ContextLink

public class ContextLink

public class ContextLink

Заметки

Examples of the relationship represented by a ContextLink relationship include:

A ParagraphNode that is encircled by an InkDrawingNode. A ContextLink object is created and added to the Links properties of both the ParagraphNode and the InkDrawingNode. The InkDrawingNode is the SourceNode and the ParagraphNode is the DestinationNode.
An AnalysisHintNode and a WritingRegionNode. When an AnalysisHintNode is used in ink analysis, a ContextLink is created between the WritingRegionNode and the AnalysisHintNode. The AnalysisHintNode is the SourceNode and the WritingRegionNode is the DestinationNode.
Two InkDrawingNode objects where a line is drawn between them, as in a flow chart.

To determine the relationship between SourceNode and DestinationNode uses the InkDrawingNode.SemanticType or WritingRegionNode.SemanticType property on the appropriate node.

Примеры

The following example finds all the nodes that are linked to the ContextNode named selectedNode. If selectedNode is not a destination node, the destination node is added to an ArrayList named destinationNodes. If selectedNode is not the source node, it is added to an ArrayList named sourceNodes.

Dim destinationNodes As New ArrayList()
Dim sourceNodes As New ArrayList()

' Find all the nodes that link to the currently selected node.
Dim link As ContextLink
For Each link In  selectedNode.Links
    If link.DestinationNode <> selectedNode Then
        destinationNodes.Add(link.DestinationNode)
    End If

    If link.SourceNode <> selectedNode Then
        sourceNodes.Add(link.SourceNode)
    End If
Next link

ArrayList destinationNodes = new ArrayList();
ArrayList sourceNodes = new ArrayList();

// Find all the nodes that link to the currently selected node.
foreach (ContextLink link in selectedNode.Links)
{
    if (link.DestinationNode != selectedNode)
    {
        destinationNodes.Add(link.DestinationNode);
    }

    if (link.SourceNode != selectedNode)
    {
        sourceNodes.Add(link.SourceNode);
    }
}

The following example finds all WritingRegionNode objects in the node tree of an InkAnalyzer named theInkAnalyzerWithHint. It then puts those that are linked to an AnalysisHintNode with a Factoid of "IS_DATE_FULLDATE" into a ContextNodeCollection, named writingRegionsWithFactoids.

Dim writingRegionsWithFactoids As New ContextNodeCollection(Me.theInkAnalyzerWithHint)
Dim allWritingRegions As ContextNodeCollection = Me.theInkAnalyzerWithHint.FindNodesOfType(ContextNodeType.WritingRegion)
Dim writingRegion As WritingRegionNode
For Each writingRegion In  allWritingRegions
    ' See if they are linked to any factoid
    Dim link As ContextLink
    For Each link In  writingRegion.Links
        If link.SourceNode.Type = ContextNodeType.AnalysisHint Then
            Dim hint As AnalysisHintNode = CType(link.SourceNode, AnalysisHintNode)
            If hint.Factoid = "IS_DATE_FULLDATE" Then
                writingRegionsWithFactoids.Add(writingRegion)
            End If
        End If
    Next link
Next writingRegion

ContextNodeCollection writingRegionsWithFactoids =
    new ContextNodeCollection(this.theInkAnalyzerWithHint);
ContextNodeCollection allWritingRegions =
    this.theInkAnalyzerWithHint.FindNodesOfType(ContextNodeType.WritingRegion);
foreach (WritingRegionNode writingRegion in allWritingRegions)
{
    // See if they are linked to any factoid
    foreach (ContextLink link in writingRegion.Links)
    {
        if (link.SourceNode.Type == ContextNodeType.AnalysisHint)
        {
            AnalysisHintNode hint = (AnalysisHintNode)link.SourceNode;
            if (hint.Factoid == "IS_DATE_FULLDATE")
            {
                writingRegionsWithFactoids.Add(writingRegion);
            }
        }
    }
}

Иерархия наследования

System.Object
System.Windows.Ink.ContextLink

Потокобезопасность

Любые открытые члены этого типа, объявленные как static (Shared в Visual Basic), являются потокобезопасными. Потокобезопасность членов экземпляров не гарантируется.

Платформы

Windows Vista

Среды .NET Framework и .NET Compact Framework поддерживают не все версии каждой платформы. Поддерживаемые версии перечислены в разделе Требования к системе для .NET Framework.