InkAnalyzer 构造函数 (Dispatcher)

2008-10-28

使用特定的 Dispatcher 对象（此对象用于同步后台分析事件）初始化 InkAnalyzer 类的新实例。

命名空间： System.Windows.Ink
程序集： IAWinFX（在 IAWinFX.dll 中）

语法

声明
Public Sub New ( _
    synchronizingObject As Dispatcher _
)
用法
Dim synchronizingObject As Dispatcher

Dim instance As New InkAnalyzer(synchronizingObject)

public InkAnalyzer(
    Dispatcher synchronizingObject
)

public:
InkAnalyzer(
    Dispatcher^ synchronizingObject
)

public InkAnalyzer(
    Dispatcher synchronizingObject
)

public function InkAnalyzer(
    synchronizingObject : Dispatcher
)

参数

synchronizingObject
类型：System.Windows.Threading.Dispatcher
指定在哪个线程上引发 InkAnalyzer 后台分析事件的对象。

示例

下面的示例创建一个新的 InkAnalyzer，并将 StrokesChanged 事件处理程序附加到 InkCanvas（名为 theInkCanvas）上的 Strokes 属性。

theInkAnalyzer = New InkAnalyzer()

AddHandler theInkCanvas.Strokes.StrokesChanged, AddressOf Strokes_StrokesChanged

theInkAnalyzer = new InkAnalyzer();

theInkCanvas.Strokes.StrokesChanged += 
    new StrokeCollectionChangedEventHandler(Strokes_StrokesChanged);

下面的示例定义 Strokes_StrokesChanged 事件处理程序；如果笔画已添加到 theInkCanvas，该事件处理程序会将其添加到 theInkAnalyzer 中。如果笔画已从 theInkCanvas 中移除，该事件处理程序也会将其从 theInkAnalyzer 中移除。

' This event occurs whenever a stroke is added, removed, or partially erased
' from the InkCanvas.
Sub Strokes_StrokesChanged(ByVal sender As Object, ByVal e As StrokeCollectionChangedEventArgs) 
    If e.Added.Count > 0 Then
        theInkAnalyzer.AddStrokes(e.Added)
    End If

    If e.Removed.Count > 0 Then
        theInkAnalyzer.RemoveStrokes(e.Removed)
    End If

End Sub 'Strokes_StrokesChanged

// This event occurs whenever a stroke is added, removed, or partially erased
// from the InkCanvas.
void Strokes_StrokesChanged(object sender, StrokeCollectionChangedEventArgs e)
{
    if (e.Added.Count > 0)
    {
        theInkAnalyzer.AddStrokes(e.Added);
    }

    if (e.Removed.Count > 0)
    {
        theInkAnalyzer.RemoveStrokes(e.Removed);
    }
}