v0

components/menu.go

@@ -0,0 +1,89 @@
+package components
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/UnintendedFraud/snake-game/components/buttons"
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
+	"github.com/hajimehoshi/ebiten/v2/text/v2"
+)
+
+type Menu struct {
+	focusedIdx int
+	buttons    []buttons.MenuButton
+	img        *ebiten.Image
+}
+
+func InitMenu() *Menu {
+	return &Menu{
+		img:        ebiten.NewImage(200, 200),
+		focusedIdx: 0,
+		buttons: []buttons.MenuButton{
+			{
+				Value:  "start game",
+				Action: buttons.StartGame,
+			},
+			{
+				Value:  "exit game",
+				Action: buttons.ExitGame,
+			},
+		},
+	}
+}
+
+func (m *Menu) Click(game *Game) {
+	if inpututil.IsKeyJustPressed(ebiten.KeyEnter) ||
+		inpututil.IsKeyJustPressed(ebiten.KeyKPEnter) {
+		m.executeAction(game, m.buttons[m.focusedIdx].Action)
+	}
+}
+
+func (m *Menu) executeAction(game *Game, action buttons.MenuAction) {
+	switch action {
+	case buttons.StartGame:
+		game.snake = InitSnake(WINDOW_WIDTH, WINDOW_HEIGHT)
+		game.state = Playing
+
+	case buttons.ExitGame:
+		fmt.Println("Closing the game")
+		os.Exit(0)
+	}
+}
+
+func (m *Menu) UpdateFocus() {
+	if inpututil.IsKeyJustPressed(ebiten.KeyUp) {
+		if m.focusedIdx != 0 {
+			m.focusedIdx--
+		}
+	}
+
+	if inpututil.IsKeyJustPressed(ebiten.KeyDown) {
+		if m.focusedIdx != len(m.buttons)-1 {
+			m.focusedIdx++
+		}
+	}
+}
+
+func (m *Menu) Render(screen *ebiten.Image, font *text.GoTextFaceSource) {
+	m.Clear()
+
+	for idx, b := range m.buttons {
+		menuImg := b.GetMenuButtonImg(font, 24, m.focusedIdx == idx)
+
+		x := float64(0)
+		y := float64(idx*50 + 50)
+		menuImgOp := &ebiten.DrawImageOptions{}
+		menuImgOp.GeoM.Translate(x, y)
+		m.img.DrawImage(menuImg, menuImgOp)
+	}
+
+	imgOp := &ebiten.DrawImageOptions{}
+	imgOp.GeoM.Translate(150, 200)
+	screen.DrawImage(m.img, imgOp)
+}
+
+func (m *Menu) Clear() {
+	m.img.Clear()
+}