WritingRegionNode Class

Článek
10/20/2012

Represents a group of paragraphs with similar orientation.

Namespace: Microsoft.Ink
Assembly: Microsoft.Ink.Analysis (in Microsoft.Ink.Analysis.dll)

Syntax

'Declaration
Public NotInheritable Class WritingRegionNode _
    Inherits ContextNode
'Usage
Dim instance As WritingRegionNode

public sealed class WritingRegionNode : ContextNode

public ref class WritingRegionNode sealed : public ContextNode

public final class WritingRegionNode extends ContextNode

Remarks

A writing region has a single reading order, such as top down.

Several writing regions can coexist in the same document on the same page if they have different orientations. For example, if a user writes notes that are primarily horizontal but then scribbles a few words diagonally in a corner, the diagonal words are considered to have a different orientation. A new WritingRegion is created for that diagonal text.

A WritingRegionNode object can contain the following types of child elements:

Any number of ParagraphNode objects.
Any number of nodes with an unknown Guid value.

For more information, see conceptual topic on WritingRegion and AlignmentLevel.

Examples

The following example takes a TextBox, selectedResultsTextBox, whose Text property has previously been set to the value returned by GetRecognizedString for a WritingRegionNode, writingRegion. The user has selected some text in the TextBox. The example code marks the Strokes that corresponds to that selection.

' Find out what's been selected in the text box 
Dim selectionStart As Integer = selectedResultsTextBox.SelectionStart
Dim selectionLength As Integer = selectedResultsTextBox.SelectionLength

' Return if no text is selected. 
' selectionLength must be > 0 or GetNodesFromTextRange(...)  
' will throw an ArgumentOutOfRangeException 
If selectionLength = 0 Then 
    Return 
End If 

' Get the nodes that correspond to that range 
Dim selectedRegionSubNodes As ContextNodeCollection = _
    writingRegion.GetNodesFromTextRange(selectionStart, selectionLength)

' Use the new start and length value to update the 
' selection in the TextBox
selectedResultsTextBox.SelectionStart = selectionStart
selectedResultsTextBox.SelectionLength = selectionLength

' First, set all strokes to black 
Dim inkStroke As Stroke
For Each inkStroke In writingRegion.Strokes
    inkStroke.DrawingAttributes = New DrawingAttributes(Color.Black)
Next inkStroke
' Next, set all selected sub nodes to red 
Dim node As ContextNode
For Each node In selectedRegionSubNodes
    For Each inkStroke In node.Strokes
        inkStroke.DrawingAttributes = New DrawingAttributes(Color.Red)
    Next inkStroke
Next node

                   // Find out what's been selected in the text box 
                    int selectionStart = selectedResultsTextBox.SelectionStart;
                    int selectionLength = selectedResultsTextBox.SelectionLength;

                    // Return if no text is selected. 
                    // selectionLength must be > 0 or GetNodesFromTextRange(...)  
                    // will throw an ArgumentOutOfRangeException 
                    if (selectionLength == 0)
                        return;

                    // Get the nodes that correspond to that range
                    ContextNodeCollection selectedRegionSubNodes =
                            writingRegion.GetNodesFromTextRange(ref selectionStart, ref selectionLength);


                    // Use the new start and length value to update the 
                    // selection in the TextBox
                    selectedResultsTextBox.SelectionStart = selectionStart;
                    selectedResultsTextBox.SelectionLength = selectionLength;

                    // First, set all strokes to black 
                    foreach (Stroke stroke in writingRegion.Strokes)
                        stroke.DrawingAttributes =
                                    new DrawingAttributes(Color.Black);
                    // Next, set all selected sub nodes to red 
                    foreach (ContextNode node in selectedRegionSubNodes)
                    {
                        foreach (Stroke stroke in node.Strokes)
                        {
                            stroke.DrawingAttributes =
                                    new DrawingAttributes(Color.Red);
                        }
                    }

Inheritance Hierarchy

System.Object
Microsoft.Ink.ContextNode
Microsoft.Ink.WritingRegionNode

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 Server 2008 R2, Windows Server 2008

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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