Touch.FrameReported 이벤트

정의

터치 메시지를 보낼 때 발생 합니다.Occurs when a touch message is sent.

public:
 static event System::Windows::Input::TouchFrameEventHandler ^ FrameReported;
public static event System.Windows.Input.TouchFrameEventHandler FrameReported;
member this.FrameReported : System.Windows.Input.TouchFrameEventHandler 
Public Shared Event FrameReported As TouchFrameEventHandler 

예제

다음 예제에서는 처리 된 FrameReported 이벤트입니다.The following example handles the FrameReported event. 터치가 누를 때 합니다 Canvas, TouchDevice 에 캡처되는지를 Canvas입니다.When a touch presses on the Canvas, the TouchDevice is captured to the Canvas. 터치 리프트 된 때를 TouchDevice 해제 됩니다.When the touch is lifted, the TouchDevice is released. 터치에서 이동 하는 경우는 Canvas, Id 확인란이 선택 되어 있습니다.When a touch moves across the Canvas, the Id is checked. 첫 번째 터치에서 이동 하는 경우, 해당 위치에 기록 됩니다.If the move came from the first touch, its location is recorded. 두 번째 터치에서 이동 하는 경우, 두 번째 터치 위치를 줄의 첫 번째 터치 위치에서 그려집니다.If the move came from the second touch, a line is drawn from the position of the first touch to the position of the second touch.

이 예제는에서 사용할 수 있는 보다 큰 예제의 일부는 Touch 클래스 개요입니다.This example is part of a larger example that is available in the Touch class overview.

public partial class MainWindow : Window
{
    // Variables for tracking the position of two points.
    Point pt1, pt2 = new Point();
    
    public MainWindow()
    {
        InitializeComponent();
        Touch.FrameReported += new TouchFrameEventHandler(Touch_FrameReported);
    }

    void Touch_FrameReported(object sender, TouchFrameEventArgs e)
    {
        if (this.canvas1 != null)
        {
            foreach (TouchPoint _touchPoint in e.GetTouchPoints(this.canvas1))
            {
                if (_touchPoint.Action == TouchAction.Down)
                {
                    // Clear the canvas and capture the touch to it.
                    this.canvas1.Children.Clear();
                    _touchPoint.TouchDevice.Capture(this.canvas1);
                }

                else if (_touchPoint.Action == TouchAction.Move && e.GetPrimaryTouchPoint(this.canvas1) != null)
                {   
                    // This is the first (primary) touch point. Just record its position.
                    if (_touchPoint.TouchDevice.Id == e.GetPrimaryTouchPoint(this.canvas1).TouchDevice.Id)
                    {
                        pt1.X = _touchPoint.Position.X;
                        pt1.Y = _touchPoint.Position.Y;
                    }

                    // This is not the first touch point. Draw a line from the first point to this one.
                    else if (_touchPoint.TouchDevice.Id != e.GetPrimaryTouchPoint(this.canvas1).TouchDevice.Id)
                    {
                        pt2.X = _touchPoint.Position.X;
                        pt2.Y = _touchPoint.Position.Y;

                        Line _line = new Line();
                        _line.Stroke = new RadialGradientBrush(Colors.White, Colors.Black);
                        _line.X1 = pt1.X;
                        _line.X2 = pt2.X;
                        _line.Y1 = pt1.Y;
                        _line.Y2 = pt2.Y;
                        _line.StrokeThickness = 2;
                        this.canvas1.Children.Add(_line);
                    }
                }

                else if (_touchPoint.Action == TouchAction.Up)
                {
                    // If this touch is captured to the canvas, release it.
                    if (_touchPoint.TouchDevice.Captured == this.canvas1)
                    {
                        this.canvas1.ReleaseTouchCapture(_touchPoint.TouchDevice);
                    }
                }
            }                        
        }
    }
}
Class MainWindow
    ' Variables for tracking the position of two points.
    Private pt1, pt2 As Point

    Public Sub New()
        InitializeComponent()
        AddHandler Touch.FrameReported, AddressOf Touch_FrameReported
    End Sub

    Private Sub Touch_FrameReported(ByVal sender As System.Object, ByVal e As System.Windows.Input.TouchFrameEventArgs)
        If (canvas1 IsNot Nothing) Then
            For Each _touchPoint In e.GetTouchPoints(Me.canvas1)

                If _touchPoint.Action = TouchAction.Down Then
                    ' Clear the canvas and capture the touch to it.
                    canvas1.Children.Clear()
                    _touchPoint.TouchDevice.Capture(canvas1)

                ElseIf _touchPoint.Action = TouchAction.Move Then
                    ' This is the first (primary) touch point. Just record its position.
                    If _touchPoint.TouchDevice.Id = e.GetPrimaryTouchPoint(Me.canvas1).TouchDevice.Id Then
                        pt1.X = _touchPoint.Position.X
                        pt1.Y = _touchPoint.Position.Y

                        ' This is not the first touch point; draw a line from the first point to this one.
                    ElseIf _touchPoint.TouchDevice.Id <> e.GetPrimaryTouchPoint(Me.canvas1).TouchDevice.Id Then
                        pt2.X = _touchPoint.Position.X
                        pt2.Y = _touchPoint.Position.Y

                        Dim _line As New Line()
                        _line.Stroke = New RadialGradientBrush(Colors.White, Colors.Black)
                        _line.X1 = pt1.X
                        _line.X2 = pt2.X
                        _line.Y1 = pt1.Y
                        _line.Y2 = pt2.Y

                        _line.StrokeThickness = 2
                        Me.canvas1.Children.Add(_line)
                    End If

                ElseIf _touchPoint.Action = TouchAction.Up Then
                    ' If this touch is captured to the canvas, release it.
                    If (_touchPoint.TouchDevice.Captured Is canvas1) Then
                        canvas1.ReleaseTouchCapture(_touchPoint.TouchDevice)
                    End If
                End If
            Next
        End If
    End Sub
End Class

설명

프레임은 일련의 다중 터치 메시지 또는 터치 포인트에서.A frame is one in a series of multitouch messages or touch points. 처리 하 여 터치에 응답할 수는 FrameReported 이벤트의 세부 정보에 액세스 하 고는 TouchPoint 에서 TouchFrameEventArgs 이벤트 데이터입니다.You can respond to touches by handling the FrameReported event and accessing the details of the TouchPoint from the TouchFrameEventArgs event data.

합니다 FrameReported 이벤트 다른 동일한 이벤트 모델을 사용 하지 WPFWPF 와 같은 입력 이벤트 TouchDownTouchMove합니다.The FrameReported event does not use the same event model as other WPFWPF input events, such as TouchDown and TouchMove. 개체 트리를 UI 통해 라우팅하는 요소별 이벤트로 노출 되는 대신는 FrameReported 이벤트는 애플리케이션 수준에서 처리 되는 단일 이벤트입니다.Instead of being exposed as an element-specific event that potentially routes through the object tree of a UI, the FrameReported event is a single event that is handled at the application level. 따라서 사용할 수 없습니다는 sender 어떤 요소가 터치 되었는지 확인 하려면 이벤트 처리기의 매개 변수입니다.Therefore, you cannot use the sender parameter of the event handler to determine what element is touched.

적용 대상