在winforms应用程序中检测各种触摸事件

ujv3wf0j  于 2023-10-23  发布在  其他
关注(0)|答案(3)|浏览(114)

我有一个触摸屏显示器与5个触摸点。我想在一个新的窗口窗体应用程序中做一些触摸工作,但我很难找到这个资源。
在winforms应用程序中可以处理触摸事件吗?我也不只是在说踢踏舞。我的意思是像捏,滑动(两个手指滑动),抓取和扭曲/旋转和缩放?
我们怎么能发现一个捏?

nfeuvbwi

nfeuvbwi1#

看看WM_GESTURE message,我想你可以在这里得到一些信息,this could also be good,可能是this
因为我不能评论你的帖子,不要把这当作一个完整的答案。我尽我所能!

vof42yt1

vof42yt12#

有一组由Microsoft提供的C#互操作库,可以让您在WinForms中检测触摸和手势。它被称为“Windows 7多点触摸.NET互操作示例库”。旧的链接是here,但似乎已经死了。目前,它在Google Code上。该档案的原始名称是Win7RC_MT.zip。我已经在我的WinForms应用程序中成功地使用了它。

gr8qqesn

gr8qqesn3#

为winforms添加手势支持-在这里解决:
LIEW HON CHIN:
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)

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