ContextNodeType Class

Defines values that specify the ContextNode object type.

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

Syntax

'Declaration
Public NotInheritable Class ContextNodeType
'Usage
Dim instance As ContextNodeType

public sealed class ContextNodeType

public ref class ContextNodeType sealed

public final class ContextNodeType

Remarks

The ContextNode.Type property and the InkAnalyzer.FindNodesOfType method frequently reference the fields in System.Windows.Ink.ContextNodeType.

Examples

This example sets the Text property of a TextBox named selectedResultsTextBox, to display the string value associated with a selected ContextNode named selectedNode. The example uses the Type property to designate the text display, based on the type value of the ContextNode.

If selectedNode.Type = ContextNodeType.WritingRegion Then 
    Dim writingRegion As WritingRegionNode = CType(selectedNode, WritingRegionNode)
    selectedResultsTextBox.Text = writingRegion.GetRecognizedString()
ElseIf selectedNode.Type = ContextNodeType.Paragraph Then 
    Dim paragraph As ParagraphNode = CType(selectedNode, ParagraphNode)
    selectedResultsTextBox.Text = paragraph.GetRecognizedString()
ElseIf selectedNode.Type = ContextNodeType.Line Then 
    Dim line As LineNode = CType(selectedNode, LineNode)
    selectedResultsTextBox.Text = line.GetRecognizedString()
ElseIf selectedNode.Type = ContextNodeType.InkWord Then 
    Dim inkWord As InkWordNode = CType(selectedNode, InkWordNode)
    Dim parentNode As ContextNode = inkWord.ParentNode
    If TypeOf parentNode Is LineNode Then 
        Dim parentLine As LineNode = CType(parentNode, LineNode)
        ' Put parent line's recognized string into the text box
        selectedResultsTextBox.Text = parentLine.GetRecognizedString()

        ' Select the text that corresponds to the ink word 
        Dim subNodes As New ContextNodeCollection(theInkAnalyzer)
        subNodes.Add(inkWord)
        Dim start As Integer 
        Dim length As Integer
        parentLine.GetTextRangeFromNodes(subNodes, start, length)
        If start >= 0 AndAlso length > 0 Then
            selectedResultsTextBox.Select(start, length)
        End If 
    End If 
ElseIf selectedNode.Type = ContextNodeType.InkDrawing Then 
    Dim drawingNode As InkDrawingNode = CType(selectedNode, InkDrawingNode)
    selectedResultsTextBox.Text = drawingNode.GetShapeName()
ElseIf selectedNode.Type = ContextNodeType.InkBullet Then 
    Dim bulletNode As InkBulletNode = CType(selectedNode, InkBulletNode)
    selectedResultsTextBox.Text = bulletNode.GetRecognizedString()
ElseIf selectedNode.Type = ContextNodeType.CustomRecognizer Then 
    Dim customRecognizer As CustomRecognizerNode = CType(selectedNode, CustomRecognizerNode)
    selectedResultsTextBox.Text = customRecognizer.GetRecognizedString()
ElseIf selectedNode.Type = ContextNodeType.Object Then 
    Dim selectedObject As ObjectNode = CType(selectedNode, ObjectNode)
    selectedResultsTextBox.Text = selectedObject.GetRecognizedString()
Else
    selectedResultsTextBox.Text = "" 
End If

if (selectedNode.Type == ContextNodeType.WritingRegion)
{
    WritingRegionNode writingRegion = (WritingRegionNode)selectedNode;
    selectedResultsTextBox.Text = writingRegion.GetRecognizedString();
}
else if (selectedNode.Type == ContextNodeType.Paragraph)
{
    ParagraphNode paragraph = (ParagraphNode)selectedNode;
    selectedResultsTextBox.Text = paragraph.GetRecognizedString();
}
else if (selectedNode.Type == ContextNodeType.Line)
{
    LineNode line = (LineNode)selectedNode;
    selectedResultsTextBox.Text = line.GetRecognizedString();
}
else if (selectedNode.Type == ContextNodeType.InkWord)
{
    InkWordNode inkWord = (InkWordNode)selectedNode;
    ContextNode parentNode = inkWord.ParentNode;
    if (parentNode is LineNode)
    {
        LineNode parentLine = (LineNode)parentNode;
        // Put parent line's recognized string into the text box
        selectedResultsTextBox.Text = parentLine.GetRecognizedString();

        // Select the text that corresponds to the ink word
        ContextNodeCollection subNodes = new ContextNodeCollection(theInkAnalyzer);
        subNodes.Add(inkWord);
        int start;
        int length;
        parentLine.GetTextRangeFromNodes(subNodes, out start, out length);
        if (start >= 0 && length > 0)
        {
            selectedResultsTextBox.Select(start, length);
        }
    }
}
else if (selectedNode.Type == ContextNodeType.InkDrawing)
{
    InkDrawingNode drawingNode = (InkDrawingNode)selectedNode;
    selectedResultsTextBox.Text = drawingNode.GetShapeName();
}
else if (selectedNode.Type == ContextNodeType.InkBullet)
{
    InkBulletNode bulletNode = (InkBulletNode)selectedNode;
    selectedResultsTextBox.Text = bulletNode.GetRecognizedString();
}
else if (selectedNode.Type == ContextNodeType.CustomRecognizer)
{
    CustomRecognizerNode customRecognizer = (CustomRecognizerNode)selectedNode;
    selectedResultsTextBox.Text = customRecognizer.GetRecognizedString();
}
else if (selectedNode.Type == ContextNodeType.Object)
{
    ObjectNode selectedObject = (ObjectNode)selectedNode;
    selectedResultsTextBox.Text = selectedObject.GetRecognizedString();
}
else
{
    selectedResultsTextBox.Text = "";
}

Inheritance Hierarchy

System.Object
  System.Windows.Ink.ContextNodeType

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

ContextNodeType Members

System.Windows.Ink Namespace

ContextNode.Type

InkAnalyzer.FindNodesOfType