[gnome-games] ui: Allow GameCollection to send game-added signal

[Alexander Mikhaylenko <alexm src gnome org>]

commit 15a30eaa5869ed7a0a646303c6456155dbbfb644
Author: theawless <theawless gmail com>
Date:   Sun Aug 26 07:13:20 2018 +0530

    ui: Allow GameCollection to send game-added signal
    
    In a subsequent commit, this will be used to wrap the Game object into
    DatabaseGame object.

 src/core/game-collection.vala | 11 +++--------
 src/ui/application.vala       |  6 +++++-
 2 files changed, 8 insertions(+), 9 deletions(-)
---
diff --git a/src/core/game-collection.vala b/src/core/game-collection.vala
index 00d64478..ce954868 100644
--- a/src/core/game-collection.vala
+++ b/src/core/game-collection.vala
@@ -1,9 +1,9 @@
 // This file is part of GNOME Games. License: GPL-3.0+.
 
 private class Games.GameCollection : Object {
-       private GenericSet<Game> games;
-       private ListStore list_store;
+       public signal void game_added (Game game);
 
+       private GenericSet<Game> games;
        private UriSource[] sources;
        private UriGameFactory[] factories;
 
@@ -12,15 +12,10 @@ private class Games.GameCollection : Object {
 
        construct {
                games = new GenericSet<Game> (Game.hash, Game.equal);
-               list_store = new ListStore (typeof (Game));
                factories_for_mime_type = new HashTable<string, Array<UriGameFactory>> (str_hash, str_equal);
                factories_for_scheme = new HashTable<string, Array<UriGameFactory>> (str_hash, str_equal);
        }
 
-       public ListStore get_list_store () {
-               return list_store;
-       }
-
        public void add_source (UriSource source) {
                sources += source;
        }
@@ -122,7 +117,7 @@ private class Games.GameCollection : Object {
                if (games.contains (game))
                        return;
 
-               list_store.append (game);
                games.add (game);
+               game_added (game);
        }
 }
diff --git a/src/ui/application.vala b/src/ui/application.vala
index b8c317ea..111b38ae 100644
--- a/src/ui/application.vala
+++ b/src/ui/application.vala
@@ -219,8 +219,12 @@ public class Games.Application : Gtk.Application {
                Gtk.StyleContext.add_provider_for_screen (screen, provider, 600);
 
                load_game_list.begin ();
+               ListStore list_store = new ListStore (typeof (Game));
+               game_collection.game_added.connect ((game) => {
+                       list_store.append (game);
+               });
 
-               window = new ApplicationWindow (game_collection.get_list_store ());
+               window = new ApplicationWindow (list_store);
                this.add_window (window);
                window.destroy.connect (() => {
                        quit_application ();