本文整理汇总了VB.NET中System.Windows.Input.TouchDevice类的典型用法代码示例。如果您正苦于以下问题：VB.NET TouchDevice类的具体用法？VB.NET TouchDevice怎么用？VB.NET TouchDevice使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了TouchDevice类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: MainWindow
Class MainWindow
' Variables to track the first two touch points
' and the ID of the first touch point.
Private pt1, pt2 As Point
Private firstTouchId As Integer = -1
' Touch Down
Private Sub canvas_TouchDown(ByVal sender As System.Object, ByVal e As System.Windows.Input.TouchEventArgs)
Dim _canvas As Canvas = CType(sender, Canvas)
If (_canvas IsNot Nothing) Then
_canvas.Children.Clear()
e.TouchDevice.Capture(_canvas)
' Record the ID of the first touch point if it hasn't been recorded.
If firstTouchId = -1 Then
firstTouchId = e.TouchDevice.Id
End If
End If
End Sub
' Touch Move
Private Sub canvas_TouchMove(ByVal sender As System.Object, ByVal e As System.Windows.Input.TouchEventArgs)
Dim _canvas As Canvas = CType(sender, Canvas)
If (_canvas IsNot Nothing) Then
Dim tp = e.GetTouchPoint(_canvas)
' This is the first touch point; just record its position.
If e.TouchDevice.Id = firstTouchId Then
pt1.X = tp.Position.X
pt1.Y = tp.Position.Y
' This is not the first touch point; draw a line from the first point to this one.
ElseIf e.TouchDevice.Id <> firstTouchId Then
pt2.X = tp.Position.X
pt2.Y = tp.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
_canvas.Children.Add(_line)
End If
End If
End Sub
' Touch Up
Private Sub canvas_TouchUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.TouchEventArgs)
Dim _canvas As Canvas = CType(sender, Canvas)
If (_canvas IsNot Nothing AndAlso e.TouchDevice.Captured Is _canvas) Then
_canvas.ReleaseTouchCapture(e.TouchDevice)
End If
End Sub
End Class