在WinForms应用程序中检测各种触摸事件

Question

我有一个具有5个触点的触摸屏显示器。我想在一个新的Windows窗体应用程序中进行一些触摸工作，但我很难找到相关资源。

在winforms应用程序中是否可以处理触摸事件？我不仅指点击，还包括捏合、滑动（双指滑动）、抓取、扭转/旋转和缩放等操作？

我们如何检测捏合手势？

- jay_t55

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你正在寻找Surface SDK，它当然不能与过时无用的winforms一起使用，而是需要使用适当的、体面的技术。 - Federico Berasategui

实际上，可以通过使用 ElementHost 容器来将 Surface SDK 与 WinForms 配合使用，详见此处。 - ulatekh

Answer 1

请看WM_GESTURE message，我认为你可以在这里获得一些信息，这也可能很好，或许还有这个。

由于我无法在您的帖子上发表评论，所以请不要将此视为完整答案。 我会尽力帮忙！

- Touk

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谢谢您的回答，我回家后会仔细研究这个问题。 - jay_t55

Answer 2

微软提供了一组名为“Windows 7 Multitouch .NET Interop Sample Library”的C#互操作库，可让您在WinForms中检测触摸和手势。您可以通过Google Code下载Win7RC_MT.zip文件，这是其归档原始名称。我已经在我的WinForms应用程序中使用它，并且取得了巨大的成功。请注意，原始链接here可能已失效。

- ulatekh

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我重新上传了Win7RC_MT.zip文件。它很难找到，现在你可以从以下链接中找到它：https://gofile.io/?c=qXnxrs - Quirzo

Answer 3

在此解决将手势支持添加到winforms中的问题：

LIEW HON CHIN的论文：

http://portal.fke.utm.my/libraryfke/files/1387_LIEWHONCHIN2011.pdf

'Imports System.Security.Permissions
'Imports System.Runtime.InteropServices


  Private first_point As New Point()
  Private second_point As New Point()
  Private iArguments As Integer = 0
  Private Const ULL_ARGUMENTS_BIT_MASK As Int64 = &HFFFFFFFFL
  Private Const WM_GESTURENOTIFY As Integer = &H11A
  Private Const WM_GESTURE As Integer = &H119
  Private Const GC_ALLGESTURES As Integer = &H1
  Private Const GID_BEGIN As Integer = 1
  Private Const GID_END As Integer = 2
  Private Const GID_ZOOM As Integer = 3
  Private Const GID_PAN As Integer = 4
  Private Const GID_ROTATE As Integer = 5
  Private Const GID_TWOFINGERTAP As Integer = 6
  Private Const GID_PRESSANDTAP As Integer = 7
  Private Const GF_BEGIN As Integer = &H1
  Private Const GF_INERTIA As Integer = &H2
  Private Const GF_END As Integer = &H4
  Private Structure GESTURECONFIG
    Public dwID As Integer
    Public dwWant As Integer
    Public dwBlock As Integer
  End Structure
  Private Structure POINTS
    Public x As Short
    Public y As Short
  End Structure
  Private Structure GESTUREINFO
    Public cbSize As Integer
    Public dwFlags As Integer
    Public dwID As Integer
    Public hwndTarget As IntPtr
    <MarshalAs(UnmanagedType.Struct)>
    Friend ptsLocation As POINTS
    Public dwInstanceID As Integer
    Public dwSequenceID As Integer
    Public ullArguments As Int64
    Public cbExtraArgs As Integer
  End Structure
  <DllImport("user32")> _
  Private Shared Function SetGestureConfig(ByVal hWnd As IntPtr, ByVal dwReserved As Integer, ByVal cIDs As Integer, ByRef pGestureConfig As GESTURECONFIG, ByVal cbSize As Integer) As <MarshalAs(UnmanagedType.Bool)> Boolean
  End Function
  <DllImport("user32")>
  Private Shared Function GetGestureInfo(ByVal hGestureInfo As IntPtr, ByRef pGestureInfo As GESTUREINFO) As <MarshalAs(UnmanagedType.Bool)> Boolean
  End Function
  Private _gestureConfigSize As Integer
  Private _gestureInfoSize As Integer
  <SecurityPermission(SecurityAction.Demand)>
  Private Sub SetupStructSizes()
    _gestureConfigSize = Marshal.SizeOf(New GESTURECONFIG())
    _gestureInfoSize = Marshal.SizeOf(New GESTUREINFO())
  End Sub
  <PermissionSet(SecurityAction.Demand, Name:="FullTrust")>
  Protected Overrides Sub WndProc(ByRef m As Message)
    Dim handled As Boolean
    Select Case m.Msg
      Case WM_GESTURENOTIFY
        Dim gc As New GESTURECONFIG()
        gc.dwID = 0
        gc.dwWant = GC_ALLGESTURES
        gc.dwBlock = 0
        Dim bResult As Boolean = SetGestureConfig(Handle, 0, 1, gc, _gestureConfigSize)
        If Not bResult Then
          Throw New Exception("Error in execution of SetGestureConfig")
        End If
        handled = True
      Case WM_GESTURE
        handled = DecodeGesture(m)
      Case Else
        handled = False
    End Select
    MyBase.WndProc(m)
    If handled Then
      Try
        m.Result = New IntPtr(1)
      Catch excep As Exception
        Debug.Print("Could not allocate result ptr")
        Debug.Print(excep.ToString())
      End Try
    End If
  End Sub
  Private Function DecodeGesture(ByRef m As Message) As Boolean
    Dim gi As GESTUREINFO
    Try
      gi = New GESTUREINFO()
    Catch excep As Exception
      Debug.Print("Could not allocate resources to decode gesture")
      Debug.Print(excep.ToString())
      Return False
    End Try
    gi.cbSize = _gestureInfoSize
    If Not GetGestureInfo(m.LParam, gi) Then
      Return False
    End If
    Select Case gi.dwID
      Case GID_BEGIN, GID_END
      Case GID_TWOFINGERTAP
        'Receipt.Show()
        'Invalidate()
      Case GID_ZOOM
        Select Case gi.dwFlags
          Case GF_BEGIN
            iArguments = CInt(Fix(gi.ullArguments And
            ULL_ARGUMENTS_BIT_MASK))
            first_point.X = gi.ptsLocation.x
            first_point.Y = gi.ptsLocation.y
            first_point = PointToClient(first_point)
          Case Else
            second_point.X = gi.ptsLocation.x
            second_point.Y = gi.ptsLocation.y
            second_point = PointToClient(second_point)
            RaiseEvent GestureHappened(Me, New GestureEventArgs With {.Operation = Gestures.Pan, .FirstPoint = first_point, .SecondPoint = second_point})
            'Invalidate()
            'MsgBox("zoom")
        End Select
      Case GID_PAN
        Select Case gi.dwFlags
          Case GF_BEGIN
            first_point.X = gi.ptsLocation.x
            first_point.Y = gi.ptsLocation.y
            first_point = PointToClient(first_point)
          Case Else
            second_point.X = gi.ptsLocation.x
            second_point.Y = gi.ptsLocation.y
            second_point = PointToClient(second_point)
            RaiseEvent GestureHappened(Me, New GestureEventArgs With {.Operation = Gestures.Pan, .FirstPoint = first_point, .SecondPoint = second_point})
            'Invalidate()
            'MsgBox("pan")
        End Select
      Case GID_PRESSANDTAP
        'If gi.dwFlags = GF_BEGIN Then
        '  Invalidate()
        'End If
      Case GID_ROTATE
        'Select Case gi.dwFlags
        '  Case GF_BEGIN
        '    iArguments = 0
        '  Case Else
        '    first_point.X = gi.ptsLocation.x
        '    first_point.Y = gi.ptsLocation.y
        '    first_point = PointToClient(first_point)
        '    Invalidate()
        'End Select
    End Select
    Return True
  End Function


  Public Enum Gestures
    Pan
    Zoom
  End Enum

  Public Class GestureEventArgs
    Inherits EventArgs
    Public Property Operation As Gestures
    Public Property FirstPoint As Point
    Public Property SecondPoint As Point
  End Class

  Public Event GestureHappened(sender As Object, e As GestureEventArgs)

- FastAl