Implemented scene events and callback handlers for those events. Manager defaults also added.

examples/splashmenu/scenes/menu.go

@@ -1,8 +1,10 @@
 package splashmenu
 
 import (
+	"cosmos/diego/groovy"
 	"image/color"
 	"log"
+	"strconv"
 
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
@@ -13,7 +15,8 @@ import (
 )
 
 var (
-	menuFont font.Face
+	titleFont font.Face
+	menuFont  font.Face
 )
 
 func init() {
@@ -23,8 +26,17 @@ func init() {
 	}
 
 	const dpi = 72
+	titleFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
+		Size:    16,
+		DPI:     dpi,
+		Hinting: font.HintingVertical,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	menuFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
-		Size:    12,
+		Size:    10,
 		DPI:     dpi,
 		Hinting: font.HintingVertical,
 	})
@@ -34,35 +46,62 @@ func init() {
 }
 
 type Menu struct {
-	bgcolor   color.RGBA
-	completed bool
+	bgcolor color.RGBA
+	options map[int]MenuOption
+	events  map[groovy.SceneEvent]func()
 }
 
 func NewMenu() Menu {
 	return Menu{
-		bgcolor:   color.RGBA{0x33, 0x33, 0x99, 0xFF},
-		completed: false,
+		bgcolor: color.RGBA{0x33, 0x33, 0x99, 0xFF},
+		events:  make(map[groovy.SceneEvent]func()),
 	}
 }
 
 func (m *Menu) Draw(screen *ebiten.Image) {
 	screen.Fill(m.bgcolor)
-	text.Draw(screen, "menu", menuFont, 40, 40, color.White)
+	text.Draw(screen, "menu", titleFont, 40, 40, color.White)
+
+	m.RenderOptions(screen)
+}
+
+func (m Menu) SetEventHandler(event groovy.SceneEvent, f func()) {
+	m.events[event] = f
+}
+
+func (m *Menu) SetOptions(options map[int]MenuOption) {
+	m.options = make(map[int]MenuOption)
+
+	for k, v := range options {
+		m.options[k] = v
+	}
+}
+
+func (m *Menu) RenderOptions(screen *ebiten.Image) {
+
+	var offset int = 20
+
+	for k, v := range m.options {
+		m.options[k] = v
+		text.Draw(screen, strconv.Itoa(k)+": "+v.Description, menuFont, 40, 60+offset*k, color.White)
+	}
+
 }
 
 func (m *Menu) Update() error {
 
 	var keysPressed []ebiten.Key
 	keysPressed = inpututil.AppendPressedKeys(keysPressed[:0])
-	for _, k := range keysPressed {
-		if k == ebiten.KeyEnter {
-			m.completed = true
+
+	for _, o := range m.options {
+		if m.events[o.SelectionEvent] != nil {
+			for _, k := range keysPressed {
+				if k == o.Mapping {
+					m.events[o.SelectionEvent]()
+				}
+			}
 		}
 	}
 
 	return nil
 }
-
-func (m *Menu) Completed() bool {
-	return m.completed
-}