[add] Added LoadingScene.

src/sj/Game.d

@@ -8,6 +8,7 @@ import std.algorithm,
 
 import sj.AbstractGame,
        sj.FontSet,
+       sj.LoadingScene,
        sj.LobbyWorld,
        sj.Music,
        sj.ProgramSet,
@@ -25,6 +26,8 @@ class Game : AbstractGame {
     const music_list = buildPath(music_dir, "list.json").readText;
     music_list_ = Music.CreateFromJson(music_list.parseJSON, music_dir);
 
+    // To prevent working GC, all objects should be created at here.
+
     fonts_    = new FontSet;
     programs_ = new ProgramSet;
 
@@ -32,9 +35,11 @@ class Game : AbstractGame {
 
     title_  = new TitleScene(lobby_, programs_);
     select_ = new SelectScene(lobby_, programs_, fonts_, music_list_);
+    load_   = new LoadingScene(lobby_, programs_, fonts_);
 
-    title_.SetupSceneDependency(select_);
-    select_.SetupSceneDependency(title_);
+    title_ .SetupSceneDependency(select_);
+    select_.SetupSceneDependency(title_, load_);
+    load_  .SetupSceneDependency();  // TODO: pass play scene
 
     title_.Initialize();
     super(title_);
@@ -43,6 +48,7 @@ class Game : AbstractGame {
   ~this() {
     title_.destroy();
     select_.destroy();
+    load_.destroy();
 
     lobby_.destroy();
 
@@ -60,6 +66,7 @@ class Game : AbstractGame {
 
   LobbyWorld lobby_;
 
-  TitleScene  title_;
-  SelectScene select_;
+  TitleScene   title_;
+  SelectScene  select_;
+  LoadingScene load_;
 }

src/sj/LoadingScene.d

@@ -0,0 +1,43 @@
+/// License: MIT
+module sj.LoadingScene;
+
+import sj.FontSet,
+       sj.KeyInput,
+       sj.LobbyWorld,
+       sj.Music,
+       sj.ProgramSet,
+       sj.SceneInterface;
+
+///
+class LoadingScene : SceneInterface {
+ public:
+  ///
+  this(LobbyWorld lobby, ProgramSet programs, FontSet fonts) {
+    lobby_    = lobby;
+    programs_ = programs;
+    fonts_    = fonts;
+  }
+  ~this() {
+  }
+
+  ///
+  void SetupSceneDependency() {  // TODO: add play scene
+  }
+
+  ///
+  void Initialize(Music music) {
+  }
+  override SceneInterface Update(KeyInput input) {
+    return this;
+  }
+  override void Draw() {
+    lobby_.Draw();
+  }
+
+ private:
+  LobbyWorld lobby_;
+
+  ProgramSet programs_;
+
+  FontSet fonts_;
+}

src/sj/SelectScene.d

@@ -12,6 +12,7 @@ import gl4d;
 
 import sj.FontSet,
        sj.KeyInput,
+       sj.LoadingScene,
        sj.LobbyWorld,
        sj.Music,
        sj.ProgramSet,
@@ -48,8 +49,9 @@ class SelectScene : SceneInterface {
   }
 
   ///
-  void SetupSceneDependency(TitleScene title_scene) {
+  void SetupSceneDependency(TitleScene title_scene, LoadingScene load_scene) {
     title_scene_ = title_scene;
+    load_scene_  = load_scene;
   }
 
   ///
@@ -88,7 +90,8 @@ class SelectScene : SceneInterface {
     }
   }
 
-  TitleScene title_scene_;
+  TitleScene   title_scene_;
+  LoadingScene load_scene_;
 
   LobbyWorld lobby_;
 
@@ -267,8 +270,6 @@ private class MusicWaitState : AbstractSceneState {
 
   void Initialize(size_t music_index) {
     music_index_ = music_index;
-
-    auto music = owner.music_list_[music_index_];
     music.PlayForPreview();
 
     with (owner.text_) {
@@ -285,6 +286,12 @@ private class MusicWaitState : AbstractSceneState {
       owner.title_scene_.Initialize();
       return CreateResult(owner.title_scene_);
     }
+    if (input.down) {
+      music.StopPlaying();
+      owner.load_scene_.Initialize(music);
+      return CreateResult(owner.load_scene_);
+    }
+
     if (input.left && music_index_ != 0) {
       music.StopPlaying();
       music_appear_state_.Initialize(music_index_-1);