WritingRegionNode 类
表示一组具有相似方向的段落。
命名空间: System.Windows.Ink
程序集: IAWinFX(在 IAWinFX.dll 中)
语法
声明
Public NotInheritable Class WritingRegionNode _
Inherits ContextNode
用法
Dim instance As WritingRegionNode
public sealed class WritingRegionNode : ContextNode
public ref class WritingRegionNode sealed : public ContextNode
public final class WritingRegionNode extends ContextNode
public final class WritingRegionNode extends ContextNode
备注
每个书写区域都有唯一的阅读顺序,如从上到下的顺序。
同一文档的同一页面中可以同时存在多个具有不同方向的书写区域。例如,如果用户主要在水平方向书写笔记,但随后在角落里斜着随意写了几个单词,那么这几个斜向的单词被视为具有不同的方向。将为这些斜向文本创建一个新的 WritingRegion。
WritingRegionNode 对象可包含任意数目的以下类型的子元素:
ParagraphNode 对象。
具有未知 Guid 值的节点。
示例
下面的示例使用 WritingRegionNode 方法标记对应于所选文本的笔画。该示例代码假定名为 theResultsTextBox 的 TextBox 的 Text 属性设置为 GetRecognizedString 方法返回的值。该示例还假定用户已在 theResultsTextBox 中选择了一些文本,并假定存在名为 theInkAnalyzer 的 InkAnalyzer。
' 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.
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
For Each stroke As Stroke In writingRegion.Strokes
stroke.DrawingAttributes.Color = Colors.Black
Next stroke
' Next, set all selected sub nodes to red
For Each node As ContextNode In selectedRegionSubNodes
For Each stroke As Stroke In node.Strokes
stroke.DrawingAttributes.Color = Colors.Red
Next stroke
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.
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.Color = Colors.Black;
// Next, set all selected sub nodes to red
foreach (ContextNode node in selectedRegionSubNodes)
{
foreach (Stroke stroke in node.Strokes)
{
stroke.DrawingAttributes.Color = Colors.Red;
}
}
继承层次结构
System.Object
System.Windows.Ink.ContextNode
System.Windows.Ink.WritingRegionNode
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