GestureRecognizer.Recognize(StrokeCollection) 方法

定義

命名空間:

System.Windows.Ink

組件:

PresentationCore.dll

在指定的 StrokeCollection 中尋找筆勢。

public:
 System::Collections::ObjectModel::ReadOnlyCollection<System::Windows::Ink::GestureRecognitionResult ^> ^ Recognize(System::Windows::Ink::StrokeCollection ^ strokes);

public System.Collections.ObjectModel.ReadOnlyCollection<System.Windows.Ink.GestureRecognitionResult> Recognize (System.Windows.Ink.StrokeCollection strokes);

member this.Recognize : System.Windows.Ink.StrokeCollection -> System.Collections.ObjectModel.ReadOnlyCollection<System.Windows.Ink.GestureRecognitionResult>

Public Function Recognize (strokes As StrokeCollection) As ReadOnlyCollection(Of GestureRecognitionResult)

參數

strokes

StrokeCollection

要搜尋筆勢的 StrokeCollection。

傳回

ReadOnlyCollection<GestureRecognitionResult>

GestureRecognitionResult 型別的陣列，包含 GestureRecognizer 可辨識的應用程式筆勢。

範例

下列範例示範如何判斷 是否 Stroke 為 ScratchOut 手勢。

private bool InterpretScratchoutGesture(Stroke stroke)
{
    // Attempt to instantiate a recognizer for scratchout gestures.
    ApplicationGesture[] gestures = { ApplicationGesture.ScratchOut };
    GestureRecognizer recognizer = new GestureRecognizer(gestures);

    if (!recognizer.IsRecognizerAvailable)
        return false;

    // Determine if the stroke was a scratchout gesture.
    StrokeCollection gestureStrokes = new StrokeCollection();
    gestureStrokes.Add(stroke);

    ReadOnlyCollection<GestureRecognitionResult> results = recognizer.Recognize(gestureStrokes);

    if (results.Count == 0)
        return false;

    // Results are returned sorted in order strongest-to-weakest; 
    // we need only analyze the first (strongest) result.
    if (results[0].ApplicationGesture == ApplicationGesture.ScratchOut &&
          results[0].RecognitionConfidence == RecognitionConfidence.Strong)
    {
        // Use the scratchout stroke to perform hit-testing and 
        // erase existing strokes, as necessary.
        return true;
    }
    else
    {
        // Not a gesture: display the stroke normally.
        return false;
    }
}

Private Function InterpretScratchoutGesture(ByVal stroke As Stroke) As Boolean
    ' Attempt to instantiate a recognizer for scratchout gestures.
    Dim gestures() As ApplicationGesture = {ApplicationGesture.ScratchOut}

    Dim recognizer As New GestureRecognizer(gestures)

    If Not recognizer.IsRecognizerAvailable Then
        Return False
    End If

    ' Determine if the stroke was a scratchout gesture.
    Dim gestureStrokes As StrokeCollection = New StrokeCollection()
    gestureStrokes.Add(stroke)

    Dim results As ReadOnlyCollection(Of GestureRecognitionResult)
    results = recognizer.Recognize(gestureStrokes)

    If results.Count = 0 Then
        Return False
    End If

    ' Results are returned sorted in order strongest-to-weakest; 
    ' we need only analyze the first (strongest) result.
    If (results(0).ApplicationGesture = ApplicationGesture.ScratchOut) Then

        ' Use the scratchout stroke to perform hit-testing and 
        ' erase existing strokes, as necessary.
        Return True
    Else
        ' Not a gesture: display the stroke normally.
        Return False
    End If
End Function

備註

方法傳回的 Recognize 陣列會依 GestureRecognitionResult.RecognitionConfidence 屬性排序。 例如， Recognize 可能會傳回 GestureRecognitionResult 具有下列值的陣列：

索引	ApplicationGesture	RecognitionConfidence
0	Check	Strong
1	NoGesture	Intermediate
2	Curlicue	Poor
3	DoubleCurlicue	Poor

這表示， GestureRecognizer 辨識 Stroke 出 可能是核取記號，不太可能 Stroke 是筆勢，而且完全不 Stroke 一定是一個 curlicue 或雙標籤。

注意

Recognize方法可以傳回陣列，其 NoGesture 值 RecognitionConfidence 高於其他應用程式手勢。 這表示 比起具有較低 RecognitionConfidence 的手勢，這更可能 Stroke 不是手勢。