examples/blocks: Remove keyStates and use inpututil instead (#415)

examples/blocks/blocks/gamepadscene.go

@@ -22,6 +22,7 @@ import (
 	"strings"
 
 	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/inpututil"
 )
 
 type GamepadScene struct {
@@ -34,7 +35,7 @@ func (s *GamepadScene) Update(state *GameState) error {
 	if s.currentIndex == 0 {
 		state.Input.gamepadConfig.Reset()
 	}
-	if state.Input.StateForKey(ebiten.KeyEscape) == 1 {
+	if inpututil.IsKeyJustPressed(ebiten.KeyEscape) {
 		state.Input.gamepadConfig.Reset()
 		state.SceneManager.GoTo(&TitleScene{})
 	}

examples/blocks/blocks/gamescene.go

@@ -25,6 +25,7 @@ import (
 
 	"github.com/hajimehoshi/ebiten"
 	"github.com/hajimehoshi/ebiten/ebitenutil"
+	"github.com/hajimehoshi/ebiten/inpututil"
 )
 
 var (
@@ -219,7 +220,7 @@ func (s *GameScene) Update(state *GameState) error {
 
 	if s.gameover {
 		// TODO: Gamepad key?
-		if state.Input.StateForKey(ebiten.KeySpace) == 1 {
+		if inpututil.IsKeyJustPressed(ebiten.KeySpace) {
 			state.SceneManager.GoTo(&TitleScene{})
 		}
 		return nil

examples/blocks/blocks/input.go

@@ -18,24 +18,16 @@ package blocks
 
 import (
 	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/inpututil"
 )
 
 // Input manages the input state including gamepads and keyboards.
 type Input struct {
-	keyStates                  map[ebiten.Key]int
 	anyGamepadButtonPressed    bool
 	virtualGamepadButtonStates map[virtualGamepadButton]int
 	gamepadConfig              gamepadConfig
 }
 
-// StateForKey returns time length indicating how long the key is pressed.
-func (i *Input) StateForKey(key ebiten.Key) int {
-	if i.keyStates == nil {
-		return 0
-	}
-	return i.keyStates[key]
-}
-
 // IsAnyGamepadButtonPressed returns a boolean value indicating
 // whether any gamepad button is pressed.
 func (i *Input) IsAnyGamepadButtonPressed() bool {
@@ -50,17 +42,6 @@ func (i *Input) stateForVirtualGamepadButton(b virtualGamepadButton) int {
 }
 
 func (i *Input) Update() {
-	if i.keyStates == nil {
-		i.keyStates = map[ebiten.Key]int{}
-	}
-	for key := ebiten.Key(0); key <= ebiten.KeyMax; key++ {
-		if !ebiten.IsKeyPressed(ebiten.Key(key)) {
-			i.keyStates[key] = 0
-			continue
-		}
-		i.keyStates[key]++
-	}
-
 	const gamepadID = 0
 	i.anyGamepadButtonPressed = false
 	for b := ebiten.GamepadButton(0); b <= ebiten.GamepadButtonMax; b++ {
@@ -83,38 +64,35 @@ func (i *Input) Update() {
 }
 
 func (i *Input) IsRotateRightJustPressed() bool {
-	if i.StateForKey(ebiten.KeySpace) == 1 || i.StateForKey(ebiten.KeyX) == 1 {
+	if inpututil.IsKeyJustPressed(ebiten.KeySpace) || inpututil.IsKeyJustPressed(ebiten.KeyX) {
 		return true
 	}
 	return i.stateForVirtualGamepadButton(virtualGamepadButtonButtonB) == 1
 }
 
 func (i *Input) IsRotateLeftJustPressed() bool {
-	if i.StateForKey(ebiten.KeyZ) == 1 {
+	if inpututil.IsKeyJustPressed(ebiten.KeyZ) {
 		return true
 	}
 	return i.stateForVirtualGamepadButton(virtualGamepadButtonButtonA) == 1
 }
 
 func (i *Input) StateForLeft() int {
-	v := i.StateForKey(ebiten.KeyLeft)
+	if v := inpututil.KeyPressDuration(ebiten.KeyLeft); 0 < v {
-	if 0 < v {
 		return v
 	}
 	return i.stateForVirtualGamepadButton(virtualGamepadButtonLeft)
 }
 
 func (i *Input) StateForRight() int {
-	v := i.StateForKey(ebiten.KeyRight)
+	if v := inpututil.KeyPressDuration(ebiten.KeyRight); 0 < v {
-	if 0 < v {
 		return v
 	}
 	return i.stateForVirtualGamepadButton(virtualGamepadButtonRight)
 }
 
 func (i *Input) StateForDown() int {
-	v := i.StateForKey(ebiten.KeyDown)
+	if v := inpututil.KeyPressDuration(ebiten.KeyDown); 0 < v {
-	if 0 < v {
 		return v
 	}
 	return i.stateForVirtualGamepadButton(virtualGamepadButtonDown)

examples/blocks/blocks/titlescene.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/hajimehoshi/ebiten"
 	"github.com/hajimehoshi/ebiten/ebitenutil"
+	"github.com/hajimehoshi/ebiten/inpututil"
 )
 
 var imageBackground *ebiten.Image
@@ -48,7 +49,7 @@ func anyGamepadAbstractButtonPressed(i *Input) bool {
 
 func (s *TitleScene) Update(state *GameState) error {
 	s.count++
-	if state.Input.StateForKey(ebiten.KeySpace) == 1 {
+	if inpututil.IsKeyJustPressed(ebiten.KeySpace) {
 		state.SceneManager.GoTo(NewGameScene())
 		return nil
 	}