add more mouse button support and Toggle() function style with KeyToggle()

mouse/mouse.h

@@ -23,10 +23,14 @@ extern "C"
 	#include <ApplicationServices/ApplicationServices.h>
 	// #include </System/Library/Frameworks/ApplicationServices.framework/Versions/A/Headers/ApplicationServices.h>
 
-	typedef enum  {
+	typedef enum {
 		LEFT_BUTTON = kCGMouseButtonLeft,
 		RIGHT_BUTTON = kCGMouseButtonRight,
-		CENTER_BUTTON = kCGMouseButtonCenter
+		CENTER_BUTTON = kCGMouseButtonCenter,
+		WheelDown  =  4,
+		WheelUp    = 5,
+		WheelLeft  =  6,
+		WheelRight = 7,
 	} MMMouseButton;
 
 #elif defined(USE_X11)
@@ -34,7 +38,11 @@ extern "C"
 	enum _MMMouseButton {
 		LEFT_BUTTON = 1,
 		CENTER_BUTTON = 2,
-		RIGHT_BUTTON = 3
+		RIGHT_BUTTON = 3,
+		WheelDown =  4,
+		WheelUp  =  5,
+		WheelLeft =  6,
+		WheelRight = 7,
 	};
 	typedef unsigned int MMMouseButton;
 
@@ -43,7 +51,11 @@ extern "C"
 	enum _MMMouseButton {
 		LEFT_BUTTON = 1,
 		CENTER_BUTTON = 2,
-		RIGHT_BUTTON = 3
+		RIGHT_BUTTON = 3,
+		WheelDown =  4,
+		WheelUp  =  5,
+		WheelLeft =  6,
+		WheelRight = 7,
 	};
 	typedef unsigned int MMMouseButton;
 
@@ -53,10 +65,11 @@ extern "C"
 
 #define MMMouseButtonIsValid(button) \
 	(button == LEFT_BUTTON || button == RIGHT_BUTTON || \
-	 button == CENTER_BUTTON)
+		button == CENTER_BUTTON || button == WheelDown || \
+		button == WheelUp || button == WheelLeft || \
+		button == WheelRight)
 
-enum __MMMouseWheelDirection
-{
+enum __MMMouseWheelDirection {
 	DIRECTION_DOWN 	= -1,
 	DIRECTION_UP	= 1
 };

robotgo.go

@@ -415,16 +415,17 @@ func ToRGBA(bit C.MMBitmapRef) *image.RGBA {
 // CheckMouse check the mouse button
 func CheckMouse(btn string) C.MMMouseButton {
 	// button = args[0].(C.MMMouseButton)
-	if btn == "left" {
-		return C.LEFT_BUTTON
+	m1 := map[string]C.MMMouseButton{
+		"left":       C.LEFT_BUTTON,
+		"center":     C.CENTER_BUTTON,
+		"right":      C.RIGHT_BUTTON,
+		"wheelDown":  C.WheelDown,
+		"wheelUp":    C.WheelUp,
+		"wheelLeft":  C.WheelLeft,
+		"wheelRight": C.WheelRight,
 	}
-
-	if btn == "center" {
-		return C.CENTER_BUTTON
-	}
-
-	if btn == "right" {
-		return C.RIGHT_BUTTON
+	if v, ok := m1[btn]; ok {
+		return v
 	}
 
 	return C.LEFT_BUTTON
@@ -445,9 +446,13 @@ func Move(x, y int) {
 }
 
 // DragMouse drag the mouse to (x, y),
-// It's not valid now, use the DragSmooth()
-func DragMouse(x, y int, args ...string) {
-	Drag(x, y, args...)
+// It's same with the DragSmooth() now
+func DragMouse(x, y int, args ...interface{}) {
+	Toggle("left")
+	MilliSleep(50)
+	// Drag(x, y, args...)
+	MoveSmooth(x, y, args...)
+	Toggle("left", "up")
 }
 
 // Drag drag the mouse to (x, y),
@@ -465,12 +470,12 @@ func Drag(x, y int, args ...string) {
 	MilliSleep(MouseSleep)
 }
 
-// DragSmooth drag the mouse smooth
+// DragSmooth drag the mouse like smooth to (x, y)
 func DragSmooth(x, y int, args ...interface{}) {
-	MouseToggle("down")
+	Toggle("left")
 	MilliSleep(50)
 	MoveSmooth(x, y, args...)
-	MouseToggle("up")
+	Toggle("left", "up")
 }
 
 // MoveMouseSmooth move the mouse smooth,
@@ -583,6 +588,28 @@ func MovesClick(x, y int, args ...interface{}) {
 	MouseClick(args...)
 }
 
+// Toggle toggle the mose, support: "left", "center", "right",
+//  "wheelDown", "wheelUp", "wheelLeft", "wheelRight"
+//
+// Examples:
+// 	robotgo.Toggle("left", "up")
+// 	robotgo.Toggle("left") // default is down
+func Toggle(key ...string) int {
+	var button C.MMMouseButton = C.LEFT_BUTTON
+	if len(key) > 0 {
+		button = CheckMouse(key[0])
+	}
+	down := C.CString("down")
+	if len(key) > 1 {
+		down = C.CString(key[1])
+	}
+
+	i := C.mouse_toggle(down, button)
+	C.free(unsafe.Pointer(down))
+	MilliSleep(MouseSleep)
+	return int(i)
+}
+
 // MouseToggle toggle the mouse
 func MouseToggle(togKey string, args ...interface{}) int {
 	var button C.MMMouseButton = C.LEFT_BUTTON