From ced3d03bdb3ce866d832e03fb212865140905a9a Mon Sep 17 00:00:00 2001
From: Thomas Leyh <leyh.thomas@web.de>
Date: Sun, 24 Jul 2016 08:14:18 +0200
Subject: Add project files.

---
 V3/Screens/ScreenManager.cs | 164 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 164 insertions(+)
 create mode 100644 V3/Screens/ScreenManager.cs

(limited to 'V3/Screens/ScreenManager.cs')

diff --git a/V3/Screens/ScreenManager.cs b/V3/Screens/ScreenManager.cs
new file mode 100644
index 0000000..97c4e28
--- /dev/null
+++ b/V3/Screens/ScreenManager.cs
@@ -0,0 +1,164 @@
+using System.Collections.Generic;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Content;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Media;
+using V3.Input;
+
+namespace V3.Screens
+{
+    /// <summary>
+    /// Default implementation of IScreenManager.
+    /// </summary>
+    // ReSharper disable once ClassNeverInstantiated.Global
+    internal sealed class ScreenManager : IScreenManager
+    {
+        private readonly IInputManager mInputManager;
+        private readonly DebugScreen mDebugScreen;
+        private readonly ContentManager mContentManager;
+
+        private readonly Stack<IScreen> mScreens = new Stack<IScreen>();
+
+        /// <summary>
+        /// Creates a new screen manager using the given input manager.
+        /// </summary>
+        public ScreenManager(IInputManager inputManager, DebugScreen debugScreen, ContentManager contentManager)
+        {
+            mInputManager = inputManager;
+            mDebugScreen = debugScreen;
+            mContentManager = contentManager;
+        }
+
+        /// <summary>
+        /// Adds a screen to the foreground.
+        /// </summary>
+        /// <param name="screen">the screen to add in the foreground</param>
+        public void AddScreen(IScreen screen)
+        {
+            mScreens.Push(screen);
+#if NO_AUDIO
+#else
+            if (screen is MainScreen)
+            {
+                MediaPlayer.IsRepeating = true;
+                MediaPlayer.Play(mContentManager.Load<Song>("Sounds/Kosta_T_-_06"));
+            }
+            else if (screen is GameScreen)
+            {
+                MediaPlayer.IsRepeating = true;
+                MediaPlayer.Play(mContentManager.Load<Song>("Sounds/Afraid_to_Go"));
+                
+            }
+            //else if (screen is PauseScreen)
+            //{
+            //    mAbstractCreature.GetSelf();
+            //    mAbstractCreature.mSoundEffectInstance.Stop();
+            //    mAbstractCreature.mSoundEffectInstanceFight.Stop();
+            //    mAbstractCreature.mSoundEffectInstanceHorse.Stop();
+            //    mAbstractCreature.mSoundEffectInstanceKnight.Stop();
+            //    mAbstractCreature.mSoundEffectInstanceMeatball.Stop();
+            //}
+#endif
+        }
+
+        /// <summary>
+        /// Removes the given screen if it is on the top of the screen stack.
+        /// </summary>
+        /// <param name="screen">the screen to remove</param>
+        public void RemoveScreen(IScreen screen)
+        {
+            if (mScreens.Count > 0 && screen.Equals(mScreens.Peek()))
+            {
+                mScreens.Pop();
+            }
+        }
+
+        /// <summary>
+        /// Clears the screen stack.
+        /// </summary>
+        public void Clear()
+        {
+            mScreens.Clear();
+        }
+
+        /// <summary>
+        /// Draws the top screen and, if enabled, the lower screens.  The draw
+        /// order is from bottom to top, i. e. the lowest enabled screen is
+        /// drawn first, and the top screen is drawn last.
+        /// </summary>
+        /// <param name="gameTime">a snapshot of the game time</param>
+        /// <param name="spriteBatch">the sprite batch to use for drawing
+        /// </param>
+        public void Draw(GameTime gameTime, SpriteBatch spriteBatch)
+        {
+            var drawScreens = new Stack<IScreen>();
+            foreach (var screen in mScreens)
+            {
+                drawScreens.Push(screen);
+                if (!screen.DrawLower)
+                    break;
+            }
+
+            foreach (var screen in drawScreens)
+            {
+                screen.Draw(gameTime, spriteBatch);
+            }
+            mDebugScreen.Draw(gameTime, spriteBatch);
+        }
+
+        /// <summary>
+        /// Updates the top screen and, if enabled, the lower screens.  The
+        /// update order is from top to bottom, i. e. the lowest enabled screen
+        /// is drawn first, and the top screen is drawn last.
+        /// </summary>
+        /// <param name="gameTime">a snapshot of the game time</param>
+        public void Update(GameTime gameTime)
+        {
+            mInputManager.Update();
+            HandleInputEvents();
+
+            mDebugScreen.Update(gameTime);
+            var currentScreens = new Stack<IScreen>(new Stack<IScreen>(mScreens));
+            foreach (var screen in currentScreens)
+            {
+                screen.Update(gameTime);
+                if (!screen.UpdateLower)
+                    break;
+            }
+        }
+
+        private void HandleInputEvents()
+        {
+            // We need to clone the stack as the input management methods
+            // might want to modify the screen stack.  We need two stacks as
+            // each stack reverses the order.
+            var currentScreens = new Stack<IScreen>(new Stack<IScreen>(mScreens));
+            foreach (var keyEvent in mInputManager.KeyEvents)
+            {
+                foreach (var screen in currentScreens)
+                {
+                    if (screen.HandleKeyEvent(keyEvent))
+                        break;
+                }
+            }
+            foreach (var mouseEvent in mInputManager.MouseEvents)
+            {
+                foreach (var screen in currentScreens)
+                {
+                    if (screen.HandleMouseEvent(mouseEvent))
+                        break;
+                }
+            }
+        }
+
+        public GameScreen GetGameScreen()
+        {
+            foreach (var screen in mScreens)
+            {
+                if (screen is GameScreen)
+                    return (GameScreen) screen;
+            }
+            return null;
+        }
+    }
+}
-- 
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