Initial commit

EvilSatellites/ScreenManager.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Input;
+using SynthySound;
+using Microsoft.Xna.Framework.Audio;
+
+namespace EvilSatellites
+{
+    public class ScreenManager : DrawableGameComponent
+    {
+        private List<IScreen> _Screens;
+        private IScreen _CurrentScreen;
+        private Game _Game;
+        private bool _Running = false;
+        public Synthy Sound = new Synthy();
+        public FDNReverb EnvironmentEffect;
+        public AudioListener Listener = new AudioListener();
+        public ScreenManager(Game instance): base(instance)
+        {
+            EnvironmentEffect = Sound.CreateReverb();
+            EnvironmentEffect.Delay = 0.03;
+            EnvironmentEffect.Wet = 30;
+            EnvironmentEffect.T60 = 3.3;
+            EnvironmentEffect.Defusion = 1;
+            EnvironmentEffect.FreePath = 0.22;
+            
+            _Game = instance;
+            _Screens = new List<IScreen>();
+            _CurrentScreen = null;
+        }
+
+        public override void Initialize()
+        {
+            _Running = true;
+            foreach (var screen in _Screens)
+            {
+                screen.Activate();
+            }
+            base.Initialize();
+        }
+
+        public void AddScreen(IScreen screen)
+        {
+            screen.Manager = this;
+            if (_Running) screen.Activate();
+            _Screens.Add(screen);
+        }
+        public void RemoveScreen(IScreen screen)
+        {
+            if (!_Screens.Contains(screen))
+            {
+                throw new Exception("Cannot remove a screen that isn't added to manager");
+            }
+            screen.Deactivate();
+            _Screens.Remove(screen);
+        }
+
+        public void Update(GameTime gameTime)
+        {
+            Sound.Update();
+            var input = Keyboard.GetState();
+            foreach (var screen in _Screens)
+            {
+                if (screen.State == ScreenState.Active) screen.HandleInput(gameTime, input);
+                screen.Update(gameTime);
+            }
+            base.Update(gameTime);
+        }
+    }
+}