ContextNodeType Class

Article
12/12/2007

Defines values that specify the type of ContextNode object.

Namespace: Microsoft.Ink
Assembly: Microsoft.Ink.Analysis (in microsoft.ink.analysis.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

public final class ContextNodeType

Not applicable.

Remarks

The ContextNode.Type property and the InkAnalyzer.FindNodesOfType method frequently use the fields of this class.

Example

This example sets the Text property of a TextBox, selectedResultsTextBox, to show an appropriate string for a ContextNode, selectedNode. It uses the Type property to choose the kind of text to show, depending on the type of the ContextNode.

Select Case selectedNode.Type
    Case Microsoft.Ink.ContextNodeType.WritingRegion
        Dim writingRegion As WritingRegionNode = _
            CType(selectedNode, WritingRegionNode)
        selectedResultsTextBox.Text = writingRegion.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.Paragraph
        Dim paragraph As ParagraphNode = _
            CType(selectedNode, ParagraphNode)
        selectedResultsTextBox.Text = paragraph.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.Line
        Dim line As LineNode = _
            CType(selectedNode, LineNode)
        selectedResultsTextBox.Text = line.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.InkWord
        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
        ' Show the time stamp
        If inkWord.ContainsPropertyData(Me.timeStampGuid) Then
            Dim timeStamp As DateTime = _
                CType(inkWord.GetPropertyData(Me.timeStampGuid), DateTime)
            timeStampLabel.Text = timeStamp.ToShortTimeString()
        End If

        ' Snippet to demonstrate GetPropertyDataIds
        Dim propertyDataIds() As Guid = inkWord.GetPropertyDataIds()

        ' Snippets to demonstrate loading and saving
        Dim data As Byte() = inkWord.SavePropertiesData()
        If (Not inkWord.LoadPropertiesData(data)) Then
            MessageBox.Show("Cannot load property data")
        End If
    Case Microsoft.Ink.ContextNodeType.InkDrawing
        Dim drawingNode As InkDrawingNode = CType(selectedNode, InkDrawingNode)
        selectedResultsTextBox.Text = drawingNode.GetShapeName()
    Case Microsoft.Ink.ContextNodeType.InkBullet
        Dim bulletNode As InkBulletNode = CType(selectedNode, InkBulletNode)
        selectedResultsTextBox.Text = bulletNode.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.Object
        Dim selectedObject As ObjectNode = selectedNode
        selectedResultsTextBox.Text = selectedObject.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.CustomRecognizer
        Dim customRecognizer As CustomRecognizerNode = selectedNode
        selectedResultsTextBox.Text = customRecognizer.GetRecognizedString()
    Case Else
        selectedResultsTextBox.Text = ""
End Select

if (selectedNode.Type == Microsoft.Ink.ContextNodeType.WritingRegion)
{
    WritingRegionNode writingRegion = (WritingRegionNode)selectedNode;
    selectedResultsTextBox.Text = writingRegion.GetRecognizedString();
}
else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.Paragraph)
{
    ParagraphNode paragraph = (ParagraphNode)selectedNode;
    selectedResultsTextBox.Text = paragraph.GetRecognizedString();
}
else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.Line)
{
    LineNode line = (LineNode)selectedNode;
    selectedResultsTextBox.Text = line.GetRecognizedString();
}
else if (selectedNode.Type == Microsoft.Ink.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 = 0;
        int length = 0;
        parentLine.GetTextRangeFromNodes(subNodes, out start, out length);
        System.Diagnostics.Debug.WriteLine(inkWord.GetRecognizedString()
            + " start: " + start + " length: " + length);
        if (start >= 0 && length > 0)
        {
            selectedResultsTextBox.Select(start, length);
        }
    }
}
else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.InkDrawing)
{
    InkDrawingNode drawingNode = (InkDrawingNode)selectedNode;
    selectedResultsTextBox.Text = drawingNode.GetShapeName();
}
else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.InkBullet)
{
    InkBulletNode bulletNode = (InkBulletNode)selectedNode;
    selectedResultsTextBox.Text = bulletNode.GetRecognizedString();
}
else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.CustomRecognizer)
{
    CustomRecognizerNode customRecognizer = (CustomRecognizerNode)selectedNode;
    selectedResultsTextBox.Text = customRecognizer.GetRecognizedString();
}
else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.Object)
{
    ObjectNode selectedObject = (ObjectNode)selectedNode;
    selectedResultsTextBox.Text = selectedObject.GetRecognizedString();
}
else
{
    selectedResultsTextBox.Text = "";
}

Inheritance Hierarchy

System.Object
Microsoft.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 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

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