Fix issue 316 Type definition for sprite

.gitignore

@@ -3,7 +3,6 @@
 .DS_Store
 sprite.txt
 game.txt
-gop.mod
 go.work
 go.json
 gop.json

camera.go

@@ -68,9 +68,9 @@ func (c *Camera) On(obj interface{}) {
 			return
 		}
 		obj = sp
-	case *Sprite:
+	case *SpriteImpl:
 	case nil:
-	case Spriter:
+	case Sprite:
 		obj = spriteOf(v)
 	case specialObj:
 		if v != Mouse {
@@ -85,7 +85,7 @@ func (c *Camera) On(obj interface{}) {
 
 func (c *Camera) updateOnObj() {
 	switch v := c.on_.(type) {
-	case *Sprite:
+	case *SpriteImpl:
 		cx, cy := v.getXY()
 		c.freecamera.MoveTo(cx, cy)
 	case nil:

event.go

@@ -153,12 +153,12 @@ func (p *eventSinkMgr) doWhenClick(this threadObj) {
 	})
 }
 
-func (p *eventSinkMgr) doWhenTouched(this threadObj, obj *Sprite) {
+func (p *eventSinkMgr) doWhenTouched(this threadObj, obj *SpriteImpl) {
 	p.allWhenTouched.asyncCall(false, this, func(ev *eventSink) {
 		if debugEvent {
 			log.Println("==> onTouched", nameOf(this), obj.name)
 		}
-		ev.sink.(func(*Sprite))(obj)
+		ev.sink.(func(interface{}))(obj)
 	})
 }
 
@@ -196,14 +196,27 @@ func (p *eventSinkMgr) doWhenBackdropChanged(name string, wait bool) {
 }
 
 // -------------------------------------------------------------------------------------
+type IEventSinks interface {
+	OnAnyKey(onKey func(key Key))
+	OnBackdrop__0(onBackdrop func(name string))
+	OnBackdrop__1(name string, onBackdrop func())
+	OnClick(onClick func())
+	OnKey__0(key Key, onKey func())
+	OnKey__1(keys []Key, onKey func(Key))
+	OnKey__2(keys []Key, onKey func())
+	OnMsg__0(onMsg func(msg string, data interface{}))
+	OnMsg__1(msg string, onMsg func())
+	OnStart(onStart func())
+	Stop(kind StopKind)
+}
 
 type eventSinks struct {
 	*eventSinkMgr
 	pthis threadObj
 }
 
 func nameOf(this interface{}) string {
-	if spr, ok := this.(*Sprite); ok {
+	if spr, ok := this.(*SpriteImpl); ok {
 		return spr.name
 	}
 	if _, ok := this.(*Game); ok {
@@ -399,7 +412,7 @@ func isGame(obj threadObj) bool {
 }
 
 func isSprite(obj threadObj) bool {
-	_, ok := obj.(*Sprite)
+	_, ok := obj.(*SpriteImpl)
 	return ok
 }