RootNode 类
表示用于描述墨迹分析结果的节点树的顶 ContextNode。
命名空间： Microsoft.Ink
程序集： Microsoft.Ink.Analysis（在 Microsoft.Ink.Analysis.dll 中）
语法
声明
Public NotInheritable Class RootNode _
Inherits ContextNode
用法
Dim instance As RootNode
public sealed class RootNode : ContextNode
public ref class RootNode sealed : public ContextNode
public final class RootNode extends ContextNode
public final class RootNode extends ContextNode
备注
RootNode 是通过 InkAnalyzer.RootNode 属性进行访问的。
RootNode 对象可包含下列类型的子元素：
任意数目的 UnclassifiedInkNode 对象。
任意数目的 WritingRegionNode 对象。
任意数目的 InkDrawingNode 对象。
任意数目的 ImageNode 对象。
任意数目的 AnalysisHintNode 对象。
任意数目的 CustomRecognizerNode 对象。
示例
下面的示例采用 InkAnalyzer (theInkAnalyzer)，并使用其 ContextNode 树从 RootNode 开始填充 TreeView (theTreeView)。这些笔画设置为在选中树视图中的节点时以红色显示。Tag 属性用于在树节点和它们所表示的上下文节点之间进行映射。
Private Sub BuildTree()
Me.theTreeView.Nodes.Clear()
Dim rootNode As New TreeNode(Me.theInkAnalyzer.RootNode.ToString())
Me.theTreeView.Nodes.Add(rootNode)
rootNode.Tag = Me.theInkAnalyzer.RootNode
WalkTree(Me.theInkAnalyzer.RootNode, rootNode)
End Sub 'BuildTree
Private Sub WalkTree(ByVal parentContextNode As Microsoft.Ink.ContextNode, _
ByVal parentTreeNode As TreeNode)
Dim cNode As ContextNode
For Each cNode In parentContextNode.SubNodes
Dim newTNode As New TreeNode(cNode.ToString())
If TypeOf cNode Is Microsoft.Ink.InkWordNode Then
newTNode.Text = newTNode.Text + _
": " + CType(cNode, InkWordNode).GetRecognizedString()
ElseIf TypeOf cNode Is Microsoft.Ink.InkDrawingNode Then
Dim shapeName As String = CType(cNode, InkDrawingNode).GetShapeName()
If shapeName <> "" Then
newTNode.Text = newTNode.Text + ": " + shapeName
End If
End If
WalkTree(cNode, newTNode)
parentTreeNode.Nodes.Add(newTNode)
' Add the context node as a tag of the tree node
newTNode.Tag = cNode
Next cNode
End Sub 'WalkTree
Private Sub theTreeView_AfterSelect(ByVal sender As Object, _
ByVal e As System.Windows.Forms.TreeViewEventArgs) _
Handles theTreeView.AfterSelect
' Get the context node
Dim selectedNode As ContextNode = CType(e.Node.Tag, ContextNode)
MarkNodeAsRed(selectedNode)
timeStampLabel.Text = ""
' Show selected results
If Not (selectedNode Is Nothing) Then
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 = String.Empty
End Select
End If
Me.currentNode = selectedNode
End Sub 'theTreeView_AfterSelect
Private Sub MarkNodeAsRed(ByVal selectedNode As ContextNode)
' Set all node strokes to black, but this one to red
Dim inkStroke As Stroke
For Each inkStroke In Me.theInkCollector.Ink.Strokes
If Not (selectedNode Is Nothing) AndAlso _
selectedNode.Strokes.Contains(inkStroke) Then
inkStroke.DrawingAttributes = New DrawingAttributes(Color.Red)
Else
inkStroke.DrawingAttributes = Me.theInkCollector.DefaultDrawingAttributes
End If
Next inkStroke
theNotesPanel.Refresh()
End Sub 'MarkNodeAsRed
private void BuildTree()
{
this.theTreeView.Nodes.Clear();
TreeNode rootNode =
new TreeNode(this.theInkAnalyzer.RootNode.ToString());
this.theTreeView.Nodes.Add(rootNode);
rootNode.Tag = this.theInkAnalyzer.RootNode;
WalkTree(this.theInkAnalyzer.RootNode, rootNode);
}
private void WalkTree(ContextNode parentContextNode, TreeNode parentTreeNode)
{
foreach (ContextNode cNode in parentContextNode.SubNodes)
{
TreeNode newTNode = new TreeNode(cNode.ToString());
if (cNode is Microsoft.Ink.InkWordNode)
{
newTNode.Text +=
": " + ((InkWordNode)cNode).GetRecognizedString();
}
else if (cNode is Microsoft.Ink.InkDrawingNode)
{
String shapeName = ((InkDrawingNode)cNode).GetShapeName();
if (shapeName != "")
newTNode.Text += ": " + shapeName;
}
WalkTree(cNode, newTNode);
parentTreeNode.Nodes.Add(newTNode);
// Add the context node as a tag of the tree node
newTNode.Tag = cNode;
}
}
private void theTreeView_AfterSelect(object sender, TreeViewEventArgs e)
{
// Get the context node
ContextNode selectedNode = (ContextNode)e.Node.Tag;
MarkNodeAsRed(selectedNode);
timeStampLabel.Text = "";
// Show selected results
if (selectedNode != null)
{
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);
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 = String.Empty;
}
if (selectedNode is InkWordNode)
{
InkWordNode inkWord = (InkWordNode)selectedNode;
// Show the time stamp
if (inkWord.ContainsPropertyData(this.timeStampGuid))
{
DateTime timeStamp =
(DateTime)inkWord.GetPropertyData(this.timeStampGuid);
timeStampLabel.Text = timeStamp.ToShortTimeString();
}
// Snippet to demonstrate GetPropertyDataIds
Guid[] propertyDataIds = inkWord.GetPropertyDataIds();
// Snippets to demonstrate loading and saving
byte[] data = inkWord.SavePropertiesData();
if (!inkWord.LoadPropertiesData(data))
MessageBox.Show("Cannot load property data");
}
}
this.currentNode = selectedNode;
}
private void MarkNodeAsRed(ContextNode selectedNode)
{
// Set all node strokes to black, but this one to red
foreach (Stroke stroke in this.theInkCollector.Ink.Strokes)
{
if (selectedNode != null &&
selectedNode.Strokes.Contains(stroke))
stroke.DrawingAttributes = new DrawingAttributes(Color.Red);
else
stroke.DrawingAttributes = this.theInkCollector.DefaultDrawingAttributes;
}
theNotesPanel.Refresh();
}
继承层次结构
System.Object
Microsoft.Ink.ContextNode
Microsoft.Ink.RootNode
线程安全
此类型的任何公共 static（在 Visual Basic 中为 Shared） 成员都是线程安全的。但不保证所有实例成员都是线程安全的。
平台
Windows Vista
.NET Framework 和 .NET Compact Framework 并不是对每个平台的所有版本都提供支持。有关支持的版本的列表，请参见.NET Framework 系统要求。
版本信息
.NET Framework
受以下版本支持：3.0