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

examples/splashmenu/scenes/splash.go

@@ -1,6 +1,7 @@
 package splashmenu
 
 import (
+	"cosmos/diego/groovy"
 	"image/color"
 	"log"
 
@@ -34,14 +35,19 @@ func init() {
 
 type Splash struct {
 	bgcolor   color.RGBA
-	completed bool
 	increment int
+	events    map[groovy.SceneEvent]func()
+}
+
+// GetSceneEvents implements groovy.Scene.
+func (*Splash) GetSceneEvents() []groovy.SceneEvent {
+	return nil
 }
 
 func NewSplash() Splash {
 	return Splash{
-		bgcolor:   color.RGBA{0xFF, 0xFF, 0xFF, 0xFF},
-		completed: false,
+		bgcolor: color.RGBA{0xFF, 0xFF, 0xFF, 0xFF},
+		events:  make(map[groovy.SceneEvent]func()),
 	}
 }
 
@@ -58,12 +64,12 @@ func (s *Splash) Update() error {
 	s.bgcolor.B = (s.bgcolor.B - 2) % 0xFF
 
 	if s.bgcolor.R == 0x00 {
-		s.completed = true
+		s.events[groovy.COMPLETED]()
 	}
 
 	return nil
 }
 
-func (s *Splash) Completed() bool {
-	return s.completed
+func (s Splash) SetEventHandler(event groovy.SceneEvent, f func()) {
+	s.events[event] = f
 }