Remove ui.InputState; Add ui.Keyboard

example/blocks/game.go

@@ -2,7 +2,6 @@ package blocks
 
 import (
 	"github.com/hajimehoshi/ebiten/graphics"
-	"github.com/hajimehoshi/ebiten/ui"
 	_ "image/png"
 )
 
@@ -61,11 +60,11 @@ func (game *Game) isInitialized() bool {
 	return true
 }
 
-func (game *Game) Update(state ui.InputState) {
+func (game *Game) Update() {
 	if !game.isInitialized() {
 		return
 	}
-	game.input.Update(state)
+	game.input.Update()
 	game.sceneManager.Update(&GameState{
 		SceneManager: game.sceneManager,
 		Input:        game.input,

example/blocks/input.go

@@ -22,9 +22,9 @@ func (i *Input) StateForKey(key ui.Key) int {
 	return i.states[key]
 }
 
-func (i *Input) Update(inputState ui.InputState) {
+func (i *Input) Update() {
 	for key := range i.states {
-		if !inputState.IsPressedKey(key) {
+		if !ui.IsKeyPressed(key) {
 			i.states[key] = 0
 			continue
 		}

ui/glfw/canvas.go

@@ -10,11 +10,11 @@ import (
 )
 
 type Canvas struct {
-	window     *glfw.Window
-	inputState *InputState
-	context    *opengl.Context
-	funcs      chan func()
-	funcsDone  chan struct{}
+	window    *glfw.Window
+	context   *opengl.Context
+	keyboard  *Keyboard
+	funcs     chan func()
+	funcsDone chan struct{}
 }
 
 func NewCanvas(width, height, scale int, title string) *Canvas {
@@ -23,12 +23,15 @@ func NewCanvas(width, height, scale int, title string) *Canvas {
 		panic(err)
 	}
 	canvas := &Canvas{
-		window:     window,
-		inputState: newInputState(),
-		funcs:      make(chan func()),
-		funcsDone:  make(chan struct{}),
+		window:    window,
+		keyboard:  NewKeyboard(),
+		funcs:     make(chan func()),
+		funcsDone: make(chan struct{}),
 	}
 
+	ui.SetKeyboard(canvas.keyboard)
+	graphics.SetTextureFactory(canvas)
+
 	// For retina displays, recalculate the scale with the framebuffer size.
 	windowWidth, _ := window.GetFramebufferSize()
 	realScale := windowWidth / width
@@ -51,10 +54,6 @@ func (c *Canvas) IsClosed() bool {
 	return c.window.ShouldClose()
 }
 
-func (c *Canvas) InputState() ui.InputState {
-	return c.inputState
-}
-
 func (c *Canvas) CreateTexture(img image.Image, filter graphics.Filter) (graphics.TextureId, error) {
 	var id graphics.TextureId
 	var err error
@@ -92,5 +91,5 @@ func (c *Canvas) use(f func()) {
 }
 
 func (c *Canvas) update() {
-	c.inputState.update(c.window)
+	c.keyboard.update(c.window)
 }

ui/glfw/inputstate.go

@@ -1,70 +0,0 @@
-package glfw
-
-import (
-	glfw "github.com/go-gl/glfw3"
-	"github.com/hajimehoshi/ebiten/ui"
-)
-
-type Keys map[ui.Key]struct{}
-
-func newKeys() Keys {
-	return Keys(map[ui.Key]struct{}{})
-}
-
-func (k Keys) add(key ui.Key) {
-	k[key] = struct{}{}
-}
-
-func (k Keys) remove(key ui.Key) {
-	delete(k, key)
-}
-
-func (k Keys) Includes(key ui.Key) bool {
-	_, ok := k[key]
-	return ok
-}
-
-type InputState struct {
-	pressedKeys Keys
-	mouseX      int
-	mouseY      int
-}
-
-func newInputState() *InputState {
-	return &InputState{
-		pressedKeys: newKeys(),
-		mouseX:      -1,
-		mouseY:      -1,
-	}
-}
-
-func (i *InputState) IsPressedKey(key ui.Key) bool {
-	return i.pressedKeys.Includes(key)
-}
-
-func (i *InputState) MouseX() int {
-	// TODO: Update
-	return i.mouseX
-}
-
-func (i *InputState) MouseY() int {
-	return i.mouseY
-}
-
-var glfwKeyCodeToKey = map[glfw.Key]ui.Key{
-	glfw.KeySpace: ui.KeySpace,
-	glfw.KeyLeft:  ui.KeyLeft,
-	glfw.KeyRight: ui.KeyRight,
-	glfw.KeyUp:    ui.KeyUp,
-	glfw.KeyDown:  ui.KeyDown,
-}
-
-func (i *InputState) update(window *glfw.Window) {
-	for g, u := range glfwKeyCodeToKey {
-		if window.GetKey(g) == glfw.Press {
-			i.pressedKeys.add(u)
-		} else {
-			i.pressedKeys.remove(u)
-		}
-	}
-}

ui/glfw/keyboard.go

@@ -0,0 +1,39 @@
+package glfw
+
+import (
+	glfw "github.com/go-gl/glfw3"
+	"github.com/hajimehoshi/ebiten/ui"
+)
+
+type Keyboard struct {
+	pressedKeys map[ui.Key]struct{}
+}
+
+func NewKeyboard() *Keyboard {
+	return &Keyboard{
+		pressedKeys: map[ui.Key]struct{}{},
+	}
+}
+
+func (k *Keyboard) IsKeyPressed(key ui.Key) bool {
+	_, ok := k.pressedKeys[key]
+	return ok
+}
+
+var glfwKeyCodeToKey = map[glfw.Key]ui.Key{
+	glfw.KeySpace: ui.KeySpace,
+	glfw.KeyLeft:  ui.KeyLeft,
+	glfw.KeyRight: ui.KeyRight,
+	glfw.KeyUp:    ui.KeyUp,
+	glfw.KeyDown:  ui.KeyDown,
+}
+
+func (k *Keyboard) update(window *glfw.Window) {
+	for g, u := range glfwKeyCodeToKey {
+		if window.GetKey(g) == glfw.Press {
+			k.pressedKeys[u] = struct{}{}
+		} else {
+			delete(k.pressedKeys, u)
+		}
+	}
+}

ui/input.go

@@ -0,0 +1,29 @@
+package ui
+
+type Key int
+
+const (
+	KeyUp Key = iota
+	KeyDown
+	KeyLeft
+	KeyRight
+	KeySpace
+	KeyMax
+)
+
+var currentKeyboard Keyboard
+
+type Keyboard interface {
+	IsKeyPressed(key Key) bool
+}
+
+func SetKeyboard(keyboard Keyboard) {
+	currentKeyboard = keyboard
+}
+
+func IsKeyPressed(key Key) bool {
+	if currentKeyboard == nil {
+		panic("ui.IsKeyPressed: currentKeyboard is not set")
+	}
+	return currentKeyboard.IsKeyPressed(key)
+}

ui/run.go

@@ -10,7 +10,7 @@ import (
 
 type Game interface {
 	Draw(context graphics.Context)
-	Update(inputState InputState)
+	Update()
 	SetTextureFactory(textureFactory graphics.TextureFactory)
 }
 
@@ -30,7 +30,7 @@ func Run(u UI, game Game, width, height, scale int, title string, fps int) {
 		default:
 			canvas.Draw(game.Draw)
 		case <-tick:
-			game.Update(canvas.InputState())
+			game.Update()
 			if canvas.IsClosed() {
 				return
 			}

ui/ui.go

@@ -4,32 +4,14 @@ import (
 	"github.com/hajimehoshi/ebiten/graphics"
 )
 
-type Key int
-
-const (
-	KeyUp Key = iota
-	KeyDown
-	KeyLeft
-	KeyRight
-	KeySpace
-	KeyMax
-)
-
 type UI interface {
 	Start(widht, height, scale int, title string) Canvas
 	DoEvents()
 	Terminate()
 }
 
-type InputState interface {
-	IsPressedKey(key Key) bool
-	MouseX() int
-	MouseY() int
-}
-
 type Canvas interface {
 	graphics.TextureFactory
 	Draw(func(graphics.Context))
 	IsClosed() bool
-	InputState() InputState
 }