InkRecognizerBase Class

Article
10/07/2012

Provides access to handwriting recognizers for use with ink analysis.

Namespace: System.Windows.Ink.AnalysisCore
Assembly: IACore (in IACore.dll)

Syntax

'Declaration
Public Class InkRecognizerBase _
    Implements IDisposable
'Usage
Dim instance As InkRecognizerBase

public class InkRecognizerBase : IDisposable

public ref class InkRecognizerBase : IDisposable

public class InkRecognizerBase implements IDisposable

Remarks

A recognizer has specific attributes and properties that allow it to perform recognition. The properties of a recognizer must be determined before recognition can occur. The types of properties that a recognizer supports determine the types of recognition that it can perform. For instance, if a recognizer does not support cursive handwriting, it returns inaccurate results when a user writes in cursive.

A recognizer also has built-in functionality that automatically manages many aspects of handwriting. For instance, it determines the metrics for the lines on which strokes are drawn. You can return the line number of a stroke, but you never need to specify how those line metrics are determined because of the built-in functionality of the recognizer.

The InkAnalyzerBase maintains a InkRecognizerBaseCollection of available recognizers. To access this collection, use the GetInkRecognizersByPriority method of the InkAnalyzerBase.

Examples

The following example defines a method that returns a string containing information about a specified InkRecognizerBase. Not shown in this example are the helper methods ListCapabilities and GetPropertyName, which use reflection to return information about specific capabilities and properties of the InkRecognizerBase.

''' <summary> 
''' Generates a string containing information about the specified InkRecognizer. 
''' </summary> 
''' <param name="theInkRecognizer"> 
''' The InkRecognizer from which to gather the information. 
''' </param> 
''' <returns> 
''' A string containing information about the specified InkRecognizer. 
''' </returns> 
Private Function GetInkRecognizerData( _
    ByVal theInkRecognizer As System.Windows.Ink.AnalysisCore.InkRecognizerBase) As String 

    ' Create a StringBuilder in which to collect the information. 
    Dim result As New System.Text.StringBuilder

    ' Add the name of the recognizer.
    result.AppendLine(String.Format("Name: {0}", theInkRecognizer.Name))

    ' Add the GUID of the recognizer.
    result.AppendLine(String.Format("   Guid: {0}", theInkRecognizer.Guid))

    ' Add the vendor of the recognizer.
    result.AppendLine(String.Format("   Vendor: {0}", theInkRecognizer.Vendor))

    ' Add the languages the recognizer supports.
    result.AppendLine("   Supports the following languages:")
    If (0 = theInkRecognizer.GetLanguages().Length) Then
        result.AppendLine("      No languages supported.")
    Else 
        For Each lcid As Integer In theInkRecognizer.GetLanguages()
            Dim theCultureInfo As New System.Globalization.CultureInfo(lcid)
            result.AppendLine(String.Format( _
                "      0x{0:x4}: {1}", lcid, theCultureInfo.EnglishName))
        Next 
    End If 

    ' Add the capabilities of the recognizer.
    result.AppendLine(String.Format( _
        "   Capabilities: 0x{0:x}", theInkRecognizer.Capabilities))

    ' List each capability separately, using a helper method.
    result.Append(Me.ListCapabilities(theInkRecognizer.Capabilities))

    ' Add the properties the recognizer supports.
    result.AppendLine("   Supports the following properties:")
    If (0 = theInkRecognizer.GetSupportedProperties().Length) Then
        result.AppendLine("      No properties supported.")
    Else 
        For Each theGuid As System.Guid In theInkRecognizer.GetSupportedProperties()
            ' Use the helper method to get the name of the property.
            result.AppendLine("      " + Me.GetPropertyName(theGuid))
        Next 
    End If 

    Return result.ToString()
End Function

        /// <summary> 
        /// Generates a string containing information about the specified InkRecognizer. 
        /// </summary> 
        /// <param name="theInkRecognizer">
        /// The InkRecognizer from which to gather the information. 
        /// </param> 
        /// <returns> 
        /// A string containing information about the specified InkRecognizer. 
        /// </returns> 
        private string GetInkRecognizerData(
            System.Windows.Ink.AnalysisCore.InkRecognizerBase theInkRecognizer)
        {
            // Create a StringBuilder in which to collect the information.
            System.Text.StringBuilder result = new System.Text.StringBuilder();

            // Add the name of the recognizer.
            result.AppendLine(string.Format(
                "Name: {0}", theInkRecognizer.Name));

            // Add the GUID of the recognizer.
            result.AppendLine(string.Format(
                "   Guid: {0}", theInkRecognizer.Guid));

            // Add the vendor of the recognizer.
            result.AppendLine(string.Format(
                "   Vendor: {0}", theInkRecognizer.Vendor));

            // Add the languages the recognizer supports.
            result.AppendLine("   Supports the following languages:");
            if (0 == theInkRecognizer.GetLanguages().Length)
            {
                result.AppendLine("      No languages supported.");
            }
            else
            {
                foreach (int lcid in theInkRecognizer.GetLanguages())
                {
                    System.Globalization.CultureInfo theCultureInfo =
                        new System.Globalization.CultureInfo(lcid);
                    result.AppendLine(string.Format(
                        "      0x{0:x4}: {1}", lcid, theCultureInfo.EnglishName));
                }
            }

            // Add the capabilities of the recognizer.
            result.AppendLine(string.Format(
                "   Capabilities: 0x{0:x}", theInkRecognizer.Capabilities));

            // List each capability separately, using a helper method.
            result.Append(this.ListCapabilities(theInkRecognizer.Capabilities));

            // Add the properties the recognizer supports.
            result.AppendLine("   Supports the following properties:");
            if (0 == theInkRecognizer.GetSupportedProperties().Length)
            {
                result.AppendLine("      No properties supported.");
            }
            else
            {
                foreach (System.Guid theGuid in theInkRecognizer.GetSupportedProperties())
                {
                    // Use the helper method to get the name of the property.
                    result.AppendLine("      " + this.GetPropertyName(theGuid));
                }
            }

            return result.ToString();
        }

Inheritance Hierarchy

System.Object
System.Windows.Ink.AnalysisCore.InkRecognizerBase

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

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