Added SendInput()

closes #19

AUTHORS

@@ -11,5 +11,6 @@
 
 Allen Dang <allengnr@gmail.com>
 Benny Siegert <bsiegert@gmail.com>
+Bruno Bigras <bigras.bruno@gmail.com>
 Gerald Rosenberg <gerald.rosenberg@gmail.com>
 Michael Henke

constants.go

@@ -2636,3 +2636,26 @@ const (
 	PFD_DOUBLEBUFFER_DONTCARE = 0x40000000
 	PFD_STEREO_DONTCARE       = 0x80000000
 )
+
+const (
+	INPUT_MOUSE    = 0
+	INPUT_KEYBOARD = 1
+	INPUT_HARDWARE = 2
+)
+
+const (
+	MOUSEEVENTF_ABSOLUTE        = 0x8000
+	MOUSEEVENTF_HWHEEL          = 0x01000
+	MOUSEEVENTF_MOVE            = 0x0001
+	MOUSEEVENTF_MOVE_NOCOALESCE = 0x2000
+	MOUSEEVENTF_LEFTDOWN        = 0x0002
+	MOUSEEVENTF_LEFTUP          = 0x0004
+	MOUSEEVENTF_RIGHTDOWN       = 0x0008
+	MOUSEEVENTF_RIGHTUP         = 0x0010
+	MOUSEEVENTF_MIDDLEDOWN      = 0x0020
+	MOUSEEVENTF_MIDDLEUP        = 0x0040
+	MOUSEEVENTF_VIRTUALDESK     = 0x4000
+	MOUSEEVENTF_WHEEL           = 0x0800
+	MOUSEEVENTF_XDOWN           = 0x0080
+	MOUSEEVENTF_XUP             = 0x0100
+)

typedef.go

@@ -838,3 +838,52 @@ type PIXELFORMATDESCRIPTOR struct {
 	DwVisibleMask          uint32
 	DwDamageMask           uint32
 }
+
+// http://msdn.microsoft.com/en-us/library/windows/desktop/ms646270(v=vs.85).aspx
+type INPUT struct {
+	Type uint32
+	Mi   MOUSEINPUT
+	Ki   KEYBDINPUT
+	Hi   HARDWAREINPUT
+}
+
+// http://msdn.microsoft.com/en-us/library/windows/desktop/ms646273(v=vs.85).aspx
+type MOUSEINPUT struct {
+	Dx          int32
+	Dy          int32
+	MouseData   uint32
+	DwFlags     uint32
+	Time        uint32
+	DwExtraInfo uintptr
+}
+
+// http://msdn.microsoft.com/en-us/library/windows/desktop/ms646271(v=vs.85).aspx
+type KEYBDINPUT struct {
+	WVk         uint16
+	WScan       uint16
+	DwFlags     uint32
+	Time        uint32
+	DwExtraInfo uintptr
+}
+
+// http://msdn.microsoft.com/en-us/library/windows/desktop/ms646269(v=vs.85).aspx
+type HARDWAREINPUT struct {
+	UMsg    uint32
+	WParamL uint16
+	WParamH uint16
+}
+
+type KbdInput struct {
+	typ uint32
+	ki  KEYBDINPUT
+}
+
+type MouseInput struct {
+	typ uint32
+	mi  MOUSEINPUT
+}
+
+type HardwareInput struct {
+	typ uint32
+	hi  HARDWAREINPUT
+}

user32.go

@@ -5,6 +5,8 @@
 package w32
 
 import (
+	// #include <WTypes.h>
+	"C"
 	"fmt"
 	"syscall"
 	"unsafe"
@@ -108,6 +110,7 @@ var (
 	procEnumDisplayMonitors           = moduser32.NewProc("EnumDisplayMonitors")
 	procEnumDisplaySettingsEx         = moduser32.NewProc("EnumDisplaySettingsExW")
 	procChangeDisplaySettingsEx       = moduser32.NewProc("ChangeDisplaySettingsExW")
+	procSendInput                     = moduser32.NewProc("SendInput")
 )
 
 func RegisterClassEx(wndClassEx *WNDCLASSEX) ATOM {
@@ -915,3 +918,31 @@ func ChangeDisplaySettingsEx(szDeviceName *uint16, devMode *DEVMODE, hwnd HWND,
 	)
 	return int32(ret)
 }
+
+func SendInput(inputs []INPUT) uint32 {
+	var validInputs []C.INPUT
+
+	for _, oneInput := range inputs {
+		input := C.INPUT{_type: C.DWORD(oneInput.Type)}
+
+		switch oneInput.Type {
+		case INPUT_MOUSE:
+			(*MouseInput)(unsafe.Pointer(&input)).mi = oneInput.Mi
+		case INPUT_KEYBOARD:
+			(*KbdInput)(unsafe.Pointer(&input)).ki = oneInput.Ki
+		case INPUT_HARDWARE:
+			(*HardwareInput)(unsafe.Pointer(&input)).hi = oneInput.Hi
+		default:
+			panic("unkown type")
+		}
+
+		validInputs = append(validInputs, input)
+	}
+
+	ret, _, _ := procSendInput.Call(
+		uintptr(len(validInputs)),
+		uintptr(unsafe.Pointer(&validInputs[0])),
+		uintptr(unsafe.Sizeof(C.INPUT{})),
+	)
+	return uint32(ret)
+}