input: Add Pause and Print Screen buttons (#555)

Fixes #579

genkeys.go

@@ -70,6 +70,10 @@ func init() {
 		"RightBracket": {"BracketRight"},
 		"GraveAccent":  {"Backquote"},
 		"NumLock":      {"NumLock"},
+		"Pause":        {"Pause"},
+		"PrintScreen":  {"PrintScreen"},
+		"ScrollLock":   {"ScrollLock"},
+		"Menu":         {"ContextMenu"},
 	}
 	// ASCII: 0 - 9
 	for c := '0'; c <= '9'; c++ {
@@ -135,6 +139,12 @@ func init() {
 		0x6a: "KPMultiply",
 		0x6d: "KPSubtract",
 		0x6b: "KPAdd",
+		0x13: "Pause",
+		0x91: "ScrollLock",
+		0x5d: "Menu",
+
+		// NOTE: On Edge, this key does not work. PrintScreen works only on keyup event, and PrintScreen doesn't work on Edge well.
+		//0x2C: "PrintScreen",
 
 		// TODO: On Edge, it is impossible to tell KPEnter and Enter / KPEqual and Equal.
 		// 0x0d: "KPEnter",

internal/input/keys.go

@@ -102,13 +102,17 @@ const (
 	KeyKPSubtract
 	KeyLeft
 	KeyLeftBracket
+	KeyMenu
 	KeyMinus
 	KeyNumLock
 	KeyPageDown
 	KeyPageUp
+	KeyPause
 	KeyPeriod
+	KeyPrintScreen
 	KeyRight
 	KeyRightBracket
+	KeyScrollLock
 	KeySemicolon
 	KeyShift
 	KeySlash

internal/input/keys_glfw.go

@@ -107,13 +107,17 @@ var glfwKeyCodeToKey = map[glfw.Key]Key{
 	glfw.KeyKPSubtract:   KeyKPSubtract,
 	glfw.KeyLeft:         KeyLeft,
 	glfw.KeyLeftBracket:  KeyLeftBracket,
+	glfw.KeyMenu:         KeyMenu,
 	glfw.KeyMinus:        KeyMinus,
 	glfw.KeyNumLock:      KeyNumLock,
 	glfw.KeyPageDown:     KeyPageDown,
 	glfw.KeyPageUp:       KeyPageUp,
+	glfw.KeyPause:        KeyPause,
 	glfw.KeyPeriod:       KeyPeriod,
+	glfw.KeyPrintScreen:  KeyPrintScreen,
 	glfw.KeyRight:        KeyRight,
 	glfw.KeyRightBracket: KeyRightBracket,
+	glfw.KeyScrollLock:   KeyScrollLock,
 	glfw.KeySemicolon:    KeySemicolon,
 	glfw.KeySlash:        KeySlash,
 	glfw.KeySpace:        KeySpace,

internal/input/keys_js.go

@@ -229,6 +229,9 @@ var keyToCodes = map[Key][]string{
 	KeyM: {
 		"KeyM",
 	},
+	KeyMenu: {
+		"ContextMenu",
+	},
 	KeyMinus: {
 		"Minus",
 	},
@@ -250,9 +253,15 @@ var keyToCodes = map[Key][]string{
 	KeyPageUp: {
 		"PageUp",
 	},
+	KeyPause: {
+		"Pause",
+	},
 	KeyPeriod: {
 		"Period",
 	},
+	KeyPrintScreen: {
+		"PrintScreen",
+	},
 	KeyQ: {
 		"KeyQ",
 	},
@@ -268,6 +277,9 @@ var keyToCodes = map[Key][]string{
 	KeyS: {
 		"KeyS",
 	},
+	KeyScrollLock: {
+		"ScrollLock",
+	},
 	KeySemicolon: {
 		"Semicolon",
 	},
@@ -316,6 +328,7 @@ var keyCodeToKeyEdge = map[int]Key{
 	16:  KeyShift,
 	17:  KeyControl,
 	18:  KeyAlt,
+	19:  KeyPause,
 	20:  KeyCapsLock,
 	27:  KeyEscape,
 	32:  KeySpace,
@@ -365,6 +378,7 @@ var keyCodeToKeyEdge = map[int]Key{
 	88:  KeyX,
 	89:  KeyY,
 	90:  KeyZ,
+	93:  KeyMenu,
 	96:  KeyKP0,
 	97:  KeyKP1,
 	98:  KeyKP2,
@@ -393,6 +407,7 @@ var keyCodeToKeyEdge = map[int]Key{
 	122: KeyF11,
 	123: KeyF12,
 	144: KeyNumLock,
+	145: KeyScrollLock,
 	186: KeySemicolon,
 	187: KeyEqual,
 	188: KeyComma,

keys.go

@@ -114,13 +114,17 @@ const (
 	KeyKPSubtract   Key = Key(input.KeyKPSubtract)
 	KeyLeft         Key = Key(input.KeyLeft)
 	KeyLeftBracket  Key = Key(input.KeyLeftBracket)
+	KeyMenu         Key = Key(input.KeyMenu)
 	KeyMinus        Key = Key(input.KeyMinus)
 	KeyNumLock      Key = Key(input.KeyNumLock)
 	KeyPageDown     Key = Key(input.KeyPageDown)
 	KeyPageUp       Key = Key(input.KeyPageUp)
+	KeyPause        Key = Key(input.KeyPause)
 	KeyPeriod       Key = Key(input.KeyPeriod)
+	KeyPrintScreen  Key = Key(input.KeyPrintScreen)
 	KeyRight        Key = Key(input.KeyRight)
 	KeyRightBracket Key = Key(input.KeyRightBracket)
+	KeyScrollLock   Key = Key(input.KeyScrollLock)
 	KeySemicolon    Key = Key(input.KeySemicolon)
 	KeyShift        Key = Key(input.KeyShift)
 	KeySlash        Key = Key(input.KeySlash)
@@ -301,6 +305,8 @@ func (k Key) String() string {
 		return "Left"
 	case KeyLeftBracket:
 		return "LeftBracket"
+	case KeyMenu:
+		return "Menu"
 	case KeyMinus:
 		return "Minus"
 	case KeyNumLock:
@@ -309,12 +315,18 @@ func (k Key) String() string {
 		return "PageDown"
 	case KeyPageUp:
 		return "PageUp"
+	case KeyPause:
+		return "Pause"
 	case KeyPeriod:
 		return "Period"
+	case KeyPrintScreen:
+		return "PrintScreen"
 	case KeyRight:
 		return "Right"
 	case KeyRightBracket:
 		return "RightBracket"
+	case KeyScrollLock:
+		return "ScrollLock"
 	case KeySemicolon:
 		return "Semicolon"
 	case KeyShift:
@@ -499,6 +511,8 @@ func keyNameToKey(name string) (Key, bool) {
 		return KeyLeft, true
 	case "leftbracket":
 		return KeyLeftBracket, true
+	case "menu":
+		return KeyMenu, true
 	case "minus":
 		return KeyMinus, true
 	case "numlock":
@@ -507,12 +521,18 @@ func keyNameToKey(name string) (Key, bool) {
 		return KeyPageDown, true
 	case "pageup":
 		return KeyPageUp, true
+	case "pause":
+		return KeyPause, true
 	case "period":
 		return KeyPeriod, true
+	case "printscreen":
+		return KeyPrintScreen, true
 	case "right":
 		return KeyRight, true
 	case "rightbracket":
 		return KeyRightBracket, true
+	case "scrolllock":
+		return KeyScrollLock, true
 	case "semicolon":
 		return KeySemicolon, true
 	case "shift":