Windows 8 - 使用 c# 在电阻式触摸屏上模拟手势

Question

有没有办法使用映射到 C# 接口的物理键盘键在电阻式触摸屏设备上模拟 Windows 8 手势（缩放、旋转、滑动）？

我的设置是用于 2 种屏幕类型（电阻式和电容式触摸屏）的经典桌面 Windows 8 应用程序。在电阻式屏幕上，无法识别多点触控手势，可以使用键盘组合或映射键（此设备上未连接鼠标）来完成。

Answer 1

Windows 8 提供了本机 touch injection 函数 InitializeTouchInjection 和 InjectTouchInput，您可以从 C# 中调用它们来合成可以转换为手势的指针输入。

Input: Touch injection sample 用 C++ 演示了这一点。

由PInvoke Interop Assistant生成的p-invoke签名

public partial class NativeConstants {

    /// TOUCH_FLAG_NONE -> 0x00000000
    public const int TOUCH_FLAG_NONE = 0;

    /// TOUCH_MASK_NONE -> 0x00000000
    public const int TOUCH_MASK_NONE = 0;

    /// TOUCH_MASK_CONTACTAREA -> 0x00000001
    public const int TOUCH_MASK_CONTACTAREA = 1;

    /// TOUCH_MASK_ORIENTATION -> 0x00000002
    public const int TOUCH_MASK_ORIENTATION = 2;

    /// TOUCH_MASK_PRESSURE -> 0x00000004
    public const int TOUCH_MASK_PRESSURE = 4;

    /// POINTER_FLAG_NONE -> 0x00000000
    public const int POINTER_FLAG_NONE = 0;

    /// POINTER_FLAG_NEW -> 0x00000001
    public const int POINTER_FLAG_NEW = 1;

    /// POINTER_FLAG_INRANGE -> 0x00000002
    public const int POINTER_FLAG_INRANGE = 2;

    /// POINTER_FLAG_INCONTACT -> 0x00000004
    public const int POINTER_FLAG_INCONTACT = 4;

    /// POINTER_FLAG_FIRSTBUTTON -> 0x00000010
    public const int POINTER_FLAG_FIRSTBUTTON = 16;

    /// POINTER_FLAG_SECONDBUTTON -> 0x00000020
    public const int POINTER_FLAG_SECONDBUTTON = 32;

    /// POINTER_FLAG_THIRDBUTTON -> 0x00000040
    public const int POINTER_FLAG_THIRDBUTTON = 64;

    /// POINTER_FLAG_FOURTHBUTTON -> 0x00000080
    public const int POINTER_FLAG_FOURTHBUTTON = 128;

    /// POINTER_FLAG_FIFTHBUTTON -> 0x00000100
    public const int POINTER_FLAG_FIFTHBUTTON = 256;

    /// POINTER_FLAG_PRIMARY -> 0x00002000
    public const int POINTER_FLAG_PRIMARY = 8192;

    /// POINTER_FLAG_CONFIDENCE -> 0x00004000
    public const int POINTER_FLAG_CONFIDENCE = 16384;

    /// POINTER_FLAG_CANCELED -> 0x00008000
    public const int POINTER_FLAG_CANCELED = 32768;

    /// POINTER_FLAG_DOWN -> 0x00010000
    public const int POINTER_FLAG_DOWN = 65536;

    /// POINTER_FLAG_UPDATE -> 0x00020000
    public const int POINTER_FLAG_UPDATE = 131072;

    /// POINTER_FLAG_UP -> 0x00040000
    public const int POINTER_FLAG_UP = 262144;

    /// POINTER_FLAG_WHEEL -> 0x00080000
    public const int POINTER_FLAG_WHEEL = 524288;

    /// POINTER_FLAG_HWHEEL -> 0x00100000
    public const int POINTER_FLAG_HWHEEL = 1048576;

    /// POINTER_FLAG_CAPTURECHANGED -> 0x00200000
    public const int POINTER_FLAG_CAPTURECHANGED = 2097152;

    /// POINTER_FLAG_HASTRANSFORM -> 0x00400000
    public const int POINTER_FLAG_HASTRANSFORM = 4194304;
}

public enum tagPOINTER_INPUT_TYPE {

    /// PT_POINTER -> 0x00000001
    PT_POINTER = 1,

    /// PT_TOUCH -> 0x00000002
    PT_TOUCH = 2,

    /// PT_PEN -> 0x00000003
    PT_PEN = 3,

    /// PT_MOUSE -> 0x00000004
    PT_MOUSE = 4,

    /// PT_TOUCHPAD -> 0x00000005
    PT_TOUCHPAD = 5,
}

public enum tagPOINTER_BUTTON_CHANGE_TYPE {

    POINTER_CHANGE_NONE,

    POINTER_CHANGE_FIRSTBUTTON_DOWN,

    POINTER_CHANGE_FIRSTBUTTON_UP,

    POINTER_CHANGE_SECONDBUTTON_DOWN,

    POINTER_CHANGE_SECONDBUTTON_UP,

    POINTER_CHANGE_THIRDBUTTON_DOWN,

    POINTER_CHANGE_THIRDBUTTON_UP,

    POINTER_CHANGE_FOURTHBUTTON_DOWN,

    POINTER_CHANGE_FOURTHBUTTON_UP,

    POINTER_CHANGE_FIFTHBUTTON_DOWN,

    POINTER_CHANGE_FIFTHBUTTON_UP,
}

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct tagPOINTER_INFO {

    /// POINTER_INPUT_TYPE->DWORD->unsigned int
    public uint pointerType;

    /// UINT32->unsigned int
    public uint pointerId;

    /// UINT32->unsigned int
    public uint frameId;

    /// POINTER_FLAGS->UINT32->unsigned int
    public uint pointerFlags;

    /// HANDLE->void*
    public System.IntPtr sourceDevice;

    /// HWND->HWND__*
    public System.IntPtr hwndTarget;

    /// POINT->tagPOINT
    public Point ptPixelLocation;

    /// POINT->tagPOINT
    public Point ptHimetricLocation;

    /// POINT->tagPOINT
    public Point ptPixelLocationRaw;

    /// POINT->tagPOINT
    public Point ptHimetricLocationRaw;

    /// DWORD->unsigned int
    public uint dwTime;

    /// UINT32->unsigned int
    public uint historyCount;

    /// INT32->int
    public int inputData;

    /// DWORD->unsigned int
    public uint dwKeyStates;

    /// UINT64->unsigned __int64
    public ulong PerformanceCount;

    /// POINTER_BUTTON_CHANGE_TYPE->tagPOINTER_BUTTON_CHANGE_TYPE
    public tagPOINTER_BUTTON_CHANGE_TYPE ButtonChangeType;
}

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct tagPOINTER_TOUCH_INFO {

    /// POINTER_INFO->tagPOINTER_INFO
    public tagPOINTER_INFO pointerInfo;

    /// TOUCH_FLAGS->UINT32->unsigned int
    public uint touchFlags;

    /// TOUCH_MASK->UINT32->unsigned int
    public uint touchMask;

    /// RECT->tagRECT
    public tagRECT rcContact;

    /// RECT->tagRECT
    public tagRECT rcContactRaw;

    /// UINT32->unsigned int
    public uint orientation;

    /// UINT32->unsigned int
    public uint pressure;
}

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct Point {

    /// LONG->int
    public int x;

    /// LONG->int
    public int y;
}

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct tagRECT {

    /// LONG->int
    public int left;

    /// LONG->int
    public int top;

    /// LONG->int
    public int right;

    /// LONG->int
    public int bottom;
}

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct HWND__ {

    /// int
    public int unused;
}

public partial class NativeMethods {

    /// Return Type: BOOL->int
    ///maxCount: UINT32->unsigned int
    ///dwMode: DWORD->unsigned int
    [System.Runtime.InteropServices.DllImportAttribute("user32.dll", EntryPoint="InitializeTouchInjection")]
    [return: System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.Bool)]
public static extern  bool InitializeTouchInjection(uint maxCount, uint dwMode) ;


    /// Return Type: BOOL->int
    ///count: UINT32->unsigned int
    ///contacts: POINTER_TOUCH_INFO*
    [System.Runtime.InteropServices.DllImportAttribute("user32.dll", EntryPoint="InjectTouchInput")]
    [return: System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.Bool)]
public static extern  bool InjectTouchInput(uint count, ref tagPOINTER_TOUCH_INFO contacts) ;

}