Make the menu buttons work

cmd/view-menu/main.go

@@ -120,7 +120,7 @@ func (e *env) Draw(screen *ebiten.Image) error {
 	cam.Scale(scaleX, scaleY)
 
 	for _, record := range e.menu.Records {
-		if err := e.drawRecord(record, screen, cam); err != nil {
+		if err := e.drawRecordRecursive(record, screen, cam); err != nil {
 			return err
 		}
 	}
@@ -128,67 +128,82 @@ func (e *env) Draw(screen *ebiten.Image) error {
 	return nil
 }
 
-func (e *env) drawRecord(record *menus.Record, screen *ebiten.Image, offset ebiten.GeoM) error {
-	// Draw this record if it's valid to do so. FIXME: lots to learn
-	if len(record.SpriteId) >= 0 {
-		spriteId := record.SpriteId[0]
-		x := float64(record.X)
-		y := float64(record.Y)
-
-		// Maybe: we either give spriteid, or y,x,spriteId ? Unsure, doesn't seem
-		// to be needed for now
-		if len(record.SpriteId) == 3 {
-			//			x = x + float64(record.SpriteId[1])
-			//			y = y + float64(record.SpriteId[0])
-			spriteId = record.SpriteId[2]
-		}
-
-		// FIXME: some here are set at -1. Presume that means don't draw.
-		if spriteId < 0 {
-			goto out
-		}
-
-		// FIXME: some are set at -1, -1. No idea why. Origin?
-		if x < 0.0 {
-			x = 0.0
-		}
-		if y < 0.0 {
-			y = 0.0
-		}
-
-		// FIXME: Need to handle multiple objects
-		obj := e.objects[0]
-		sprite, err := obj.Sprite(spriteId)
-		if err != nil {
-			return err
-		}
-
-		x = x + float64(sprite.XOffset)
-		y = y + float64(sprite.YOffset)
-		// Account for scaling
-		x, y = offset.Apply(x, y)
-
-		log.Printf(
-			"Drawing id=%v type=%v spriteid=%v x=%v(+%v) y=%v(%+v) desc=%q parent=%p",
-			record.Id, record.Type, spriteId, record.X, record.Y, sprite.XOffset, sprite.YOffset, record.Desc, record.Parent,
-		)
-
-		offset.Translate(x, y)
-		screen.DrawImage(sprite.Image, &ebiten.DrawImageOptions{GeoM: offset})
-
-		// FIXME: we probably shouldn't draw everything?
-		// FIXME: handle multiple fonts
-		// if len(e.fonts) > 0 && record.Desc != "" {
-		// 	e.fonts[0].Output(screen, origOffset, record.Desc)
-		// }
+func (e *env) drawRecordRecursive(record *menus.Record, screen *ebiten.Image, geo ebiten.GeoM) error {
+	if err := e.drawRecord(record, screen, geo); err != nil {
+		return err
 	}
-out:
+
 	// Draw all children of this record
 	for _, child := range record.Children {
-		if err := e.drawRecord(child, screen, offset); err != nil {
+		if err := e.drawRecordRecursive(child, screen, geo); err != nil {
 			return err
 		}
 	}
 
 	return nil
 }
+
+// If the record has a "share" type, we can work out whether it's
+func (e *env) isFocused(record *menus.Record, geo ebiten.GeoM) bool {
+	if record.Share < 0 {
+		return false
+	}
+
+	sprite, err := e.objects[0].Sprite(record.Share) // FIXME: need to handle multiple objects
+	if err != nil {
+		return false
+	}
+
+	invGeo := geo
+	invGeo.Invert()
+
+	cX, cY := ebiten.CursorPosition()
+	cursorX, cursorY := invGeo.Apply(float64(cX), float64(cY)) // Undo screen scaling
+	cursorPoint := image.Pt(int(cursorX), int(cursorY))
+
+	return cursorPoint.In(sprite.Rect)
+}
+
+func (e *env) drawRecord(record *menus.Record, screen *ebiten.Image, geo ebiten.GeoM) error {
+	// Draw this record if it's valid to do so. FIXME: lots to learn
+
+	spriteId := record.SelectSprite(
+		e.step/2,
+		ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft),
+		e.isFocused(record, geo),
+	)
+
+	if spriteId < 0 {
+		return nil
+	}
+
+	// X-CORD and Y-CORD are universally either 0 or -1, so ignore here.
+	// TODO: maybe 0 overrides in-sprite offset (set below)?
+
+	// FIXME: Need to handle multiple objects
+	obj := e.objects[0]
+	sprite, err := obj.Sprite(spriteId)
+	if err != nil {
+		return err
+	}
+
+	// Account for scaling, draw sprite at its specified offset
+	x, y := geo.Apply(float64(sprite.XOffset), float64(sprite.YOffset))
+
+	// log.Printf(
+	// 	"Drawing id=%v type=%v spriteid=%v x=%v(+%v) y=%v(%+v) desc=%q parent=%p",
+	// 	record.Id, record.Type, spriteId, record.X, record.Y, sprite.XOffset, sprite.YOffset, record.Desc, record.Parent,
+	// )
+
+	geo.Translate(x, y)
+
+	screen.DrawImage(sprite.Image, &ebiten.DrawImageOptions{GeoM: geo})
+
+	// FIXME: we probably shouldn't draw everything?
+	// FIXME: handle multiple fonts
+	// if len(e.fonts) > 0 && record.Desc != "" {
+	// 	e.fonts[0].Output(screen, origOffset, record.Desc)
+	// }
+
+	return nil
+}