ContextNodeBase 類別
表示在筆墨分析中所建立物件之樹狀目錄的節點。
命名空間: System.Windows.Ink.AnalysisCore
組件: IACore (在 IACore.dll 中)
語法
'宣告
Public Class ContextNodeBase
'用途
Dim instance As ContextNodeBase
public class ContextNodeBase
public ref class ContextNodeBase
public class ContextNodeBase
public class ContextNodeBase
範例
這個範例會取得名為 theInkAnalyzer 的 InkAnalyzerBase,並且使用其 ContextNodeBase 樹狀目錄填滿名為 theTreeView 的 System.Windows.Forms.TreeView。已選取樹狀檢視中的節點時,那些筆劃會設定為以紅色顯示。Tag (英文) 屬性是用來對應樹狀目錄節點及其所表示的內容節點。
Private Sub BuildTree()
Me.theTreeView.Nodes.Clear()
Dim rootNode As New TreeNode(Me.theInkAnalyzerBase.RootNode.ToString())
Me.theTreeView.Nodes.Add(rootNode)
rootNode.Tag = Me.theInkAnalyzerBase.RootNode
WalkTree(Me.theInkAnalyzerBase.RootNode, rootNode)
End Sub 'BuildTree
Private Sub WalkTree(ByVal parentContextNode As ContextNodeBase, ByVal parentTreeNode As TreeNode)
Dim cNode As ContextNodeBase
For Each cNode In parentContextNode.SubNodes
Dim newTNode As New TreeNode(cNode.ToString())
If cNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkWord AndAlso _
cNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.RecognizedString) Then
newTNode.Text = newTNode.Text + _
": " + CType(cNode.GetPropertyData(PropertyGuidsForContextNodesBase.RecognizedString), _
String)
ElseIf cNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkDrawing AndAlso _
cNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.ShapeName) Then
Dim shapeName As String = CType(cNode.GetPropertyData(PropertyGuidsForContextNodesBase.ShapeName), _
String)
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 ContextNodeBase = CType(e.Node.Tag, ContextNodeBase)
MarkNodeAsRed(selectedNode)
timeStampLabel.Text = ""
' Show selected results
If Not (selectedNode Is Nothing) Then
If (selectedNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.RecognizedString) AndAlso _
(selectedNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.WritingRegion OrElse _
selectedNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Paragraph OrElse _
selectedNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.CustomRecognizer OrElse _
selectedNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Object OrElse _
selectedNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Line)) Then
selectedResultsTextBox.Text = _
CType(selectedNode.GetPropertyData(PropertyGuidsForContextNodesBase.RecognizedString), String)
ElseIf (selectedNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkWord) Then
Dim parentNode As ContextNodeBase = selectedNode.ParentNode
If (parentNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Line AndAlso _
parentNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.RecognizedString)) Then
' Put parent line's recognized string into the text box
selectedResultsTextBox.Text = _
CType(parentNode.GetPropertyData(PropertyGuidsForContextNodesBase.RecognizedString), String)
' Select the text that corresponds to the ink word
Dim subNodes As New ContextNodeBaseCollection(theInkAnalyzerBase)
subNodes.Add(selectedNode)
Dim start As Integer
Dim length As Integer
theInkAnalyzerBase.GetTextRangeFromNodes(subNodes, start, length)
If (start >= 0 AndAlso length > 0) Then
selectedResultsTextBox.Select(start, length)
End If
End If
ElseIf (selectedNode.Type = System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkDrawing AndAlso _
selectedNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.ShapeName)) Then
selectedResultsTextBox.Text = _
CType(selectedNode.GetPropertyData(PropertyGuidsForContextNodesBase.ShapeName), String)
End If
End If
Me.currentNode = selectedNode
End Sub 'theTreeView_AfterSelect
Private Sub MarkNodeAsRed(ByVal selectedNode As ContextNodeBase)
Dim selectedNodeStrokes As Strokes = Nothing
If Not selectedNode Is Nothing Then
selectedNodeStrokes = theInk.CreateStrokes(selectedNode.GetStrokeIds())
End If
' Set all node strokes to black, but this one to red
Dim stroke As Stroke
For Each stroke In Me.theInkCollector.Ink.Strokes
If (Not selectedNodeStrokes Is Nothing And _
selectedNodeStrokes.Contains(stroke)) Then
stroke.DrawingAttributes = New DrawingAttributes(Color.Red)
Else
stroke.DrawingAttributes = Me.theInkCollector.DefaultDrawingAttributes
End If
Next
theNotesPanel.Refresh()
End Sub
private void BuildTree()
{
this.theTreeView.Nodes.Clear();
TreeNode rootNode =
new TreeNode(this.theInkAnalyzerBase.RootNode.ToString());
this.theTreeView.Nodes.Add(rootNode);
rootNode.Tag = this.theInkAnalyzerBase.RootNode;
WalkTree(this.theInkAnalyzerBase.RootNode, rootNode);
}
private void WalkTree(
System.Windows.Ink.AnalysisCore.ContextNodeBase parentContextNode, TreeNode parentTreeNode)
{
foreach (ContextNodeBase cNode in parentContextNode.SubNodes)
{
TreeNode newTNode = new TreeNode(cNode.ToString());
if ((cNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkWord) &&
cNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.RecognizedString))
{
// Get the recognized string
newTNode.Text += ": " +
(string)cNode.GetPropertyData(PropertyGuidsForContextNodesBase.RecognizedString);
}
else if ((cNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkDrawing) &&
cNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.ShapeName))
{
newTNode.Text += ": " +
(string)cNode.GetPropertyData(PropertyGuidsForContextNodesBase.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, System.Windows.Forms.TreeViewEventArgs e)
{
// Get the context node
ContextNodeBase selectedNode = (ContextNodeBase)e.Node.Tag;
MarkNodeAsRed(selectedNode);
timeStampLabel.Text = "";
// Show selected results
if (selectedNode != null)
{
if (selectedNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.RecognizedString) &&
(selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.WritingRegion ||
selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Paragraph ||
selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.CustomRecognizer ||
selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Object ||
selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Line))
{
selectedResultsTextBox.Text =
(string)selectedNode.GetPropertyData(PropertyGuidsForContextNodesBase.RecognizedString);
}
else if (selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkWord)
{
ContextNodeBase parentNode = selectedNode.ParentNode;
if (parentNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.Line &&
parentNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.RecognizedString))
{
// Put parent line's recognized string into the text box
selectedResultsTextBox.Text =
(string)parentNode.GetPropertyData(PropertyGuidsForContextNodesBase.RecognizedString);
// Select the text that corresponds to the ink word
ContextNodeBaseCollection subNodes = new ContextNodeBaseCollection(theInkAnalyzerBase);
subNodes.Add(selectedNode);
int start;
int length;
theInkAnalyzerBase.GetTextRangeFromNodes(subNodes, out start, out length);
if (start >= 0 && length > 0)
{
selectedResultsTextBox.Select(start, length);
}
}
}
else if (selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkDrawing &&
selectedNode.ContainsPropertyData(PropertyGuidsForContextNodesBase.ShapeName))
{
selectedResultsTextBox.Text =
(string)selectedNode.GetPropertyData(PropertyGuidsForContextNodesBase.ShapeName);
}
if (selectedNode.Type == System.Windows.Ink.AnalysisCore.ContextNodeTypeBase.InkWord)
{
// Show the time stamp
if (selectedNode.ContainsPropertyData(this.timeStampGuid))
{
DateTime timeStamp =
(DateTime)selectedNode.GetPropertyData(this.timeStampGuid);
timeStampLabel.Text = timeStamp.ToShortTimeString();
}
// Snippet to demonstrate GetPropertyDataIds
Guid[] propertyDataIds = selectedNode.GetPropertyDataIds();
// Snippets to demonstrate loading and saving
byte[] data = selectedNode.SavePropertiesData();
if (!selectedNode.LoadPropertiesData(data))
MessageBox.Show("Cannot load property data");
}
}
this.currentNode = selectedNode;
}
private void MarkNodeAsRed(ContextNodeBase selectedNode)
{
Strokes selectedNodeStrokes = null;
if (selectedNode != null)
{
selectedNodeStrokes = theInk.CreateStrokes(selectedNode.GetStrokeIds());
}
// Set all node strokes to black, but this one to red
foreach (Stroke stroke in this.theInkCollector.Ink.Strokes)
{
if (selectedNodeStrokes != null &&
selectedNodeStrokes.Contains(stroke))
stroke.DrawingAttributes = new DrawingAttributes(Color.Red);
else
stroke.DrawingAttributes = this.theInkCollector.DefaultDrawingAttributes;
}
theNotesPanel.Refresh();
}
繼承階層架構
System.Object
System.Windows.Ink.AnalysisCore.ContextNodeBase
執行緒安全
這個型別的任何 Public static (在 Visual Basic 中為 Shared) 成員都具備執行緒安全。並非所有的執行個體成員都是安全執行緒。
平台
Windows Vista, Windows XP SP2, Windows Server 2003
.NET Framework 和 .NET Compact Framework 並不支援各種平台的所有版本。如需支援平台版本的相關資訊,請參閱 .NET Framework 系統需求。
版本資訊
.NET Framework
支援版本:3.0
請參閱
參考
System.Windows.Ink.AnalysisCore 命名空間
System.Windows.Ink.AnalysisCore.ContextNodeBase