From 42fcc8a1f00f17a10bdc3f877f3a91a2a7cd2458 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20V=C3=B6gele?= <develop@manuel-voegele.de>
Date: Thu, 15 May 2014 13:40:29 +0200
Subject: [PATCH] Observer-modell

---
 src/Backend.cs | 27 ++++++++++++++-------------
 src/Entity.cs  |  2 +-
 src/Parser.cs  |  2 +-
 src/Player.cs  | 13 +++++++++++++
 4 files changed, 29 insertions(+), 15 deletions(-)

diff --git a/src/Backend.cs b/src/Backend.cs
index b523ea0..c0618de 100644
--- a/src/Backend.cs
+++ b/src/Backend.cs
@@ -19,6 +19,7 @@ namespace WorldOfPeacecraft
 		private int SelfId;
 		private AutoResetEvent InitializedEvent = new AutoResetEvent(false);
 		private bool initialized = false;
+		private Pathwalker Pathwalker = new Pathwalker();
 
 		public Backend (IGui gui)
 		{
@@ -40,6 +41,7 @@ namespace WorldOfPeacecraft
 		public void SetSelfId (int id)
 		{
 			this.SelfId = id;
+			Players[SelfId].LocationChanged += OnPlayerMoved;
 		}
 
 		public IEnumerable<IEntity> GetDragons ()
@@ -151,22 +153,21 @@ namespace WorldOfPeacecraft
 
 		public void MoveTo (int x, int y)
 		{
-			if (Map.GetTiles () [x, y].IsWalkable ()) {
-				Thread thread = new Thread (() => WalkTo (x, y));
-				thread.IsBackground = true;
-				thread.Start ();
-			}
+			// Hier müsste man locken
+			Pathwalker.Stop();
+			LinkedList<Coordinate> path = Pathfinder.FindPath (Players [SelfId].Coord, new Coordinate (x, y), Map);
+			Pathwalker.SetCoords (path);
 		}
 
-		private void WalkTo (int x, int y)
+		public void MoveStep ()
 		{
-			LinkedList<Coordinate> path = Pathfinder.FindPath (Players [SelfId].Coord, new Coordinate (x, y), Map);
-			Pathwalker walker = new Pathwalker ();
-			walker.SetCoords (path);
-			while (walker.HasMoreSteps()) {
-				SenderBuffer.AddLine("ask:" + walker.NextStep());
-				Thread.Sleep(250);
-			}
+			if (Pathwalker.HasMoreSteps())
+				SenderBuffer.AddLine("ask:" + Pathwalker.NextStep());
+		}
+
+		public void OnPlayerMoved (int x, int y)
+		{
+			MoveStep();
 		}
 
 		public void RefreshGui ()
diff --git a/src/Entity.cs b/src/Entity.cs
index ee8b675..61c6ecd 100644
--- a/src/Entity.cs
+++ b/src/Entity.cs
@@ -41,7 +41,7 @@ namespace WorldOfPeacecraft
 			return Coord.X;
 		}
 
-		public void SetPos (int x, int y)
+		public virtual void SetPos (int x, int y)
 		{
 			SetX (x);
 			SetY (y);
diff --git a/src/Parser.cs b/src/Parser.cs
index ceb433d..be27981 100644
--- a/src/Parser.cs
+++ b/src/Parser.cs
@@ -292,8 +292,8 @@ namespace WorldOfPeacecraft
 		{
 			Player self = MapPlayer (playerBlock);
 			lock (Backend) {
-				Backend.SetSelfId(self.GetId());
 				Backend.SetPlayer(self);
+				Backend.SetSelfId(self.GetId());
 			}
 			Backend.RefreshGui ();
 		}
diff --git a/src/Player.cs b/src/Player.cs
index 49e65ab..1b7164f 100644
--- a/src/Player.cs
+++ b/src/Player.cs
@@ -4,6 +4,9 @@ namespace WorldOfPeacecraft
 	{
 		private int Score;
 
+		public delegate void LocationChangedEventHandler (int x, int y);
+		public event LocationChangedEventHandler LocationChanged;
+
 		public Player (int id, int posX, int posY, string desc, bool busy, int score) : base(id, posX, posY, desc, busy)
 		{
 			this.SetScore(score);
@@ -24,6 +27,16 @@ namespace WorldOfPeacecraft
 			return Desc;
 		}
 
+		public override void SetPos (int x, int y)
+		{
+			bool positionChanged = false;
+			if (x != GetX() || y != GetY ())
+				positionChanged = true;
+			base.SetPos (x, y);
+			if (LocationChanged != null)
+				LocationChanged(x, y);
+		}
+
         public override string ToString()
         {
             return "Player: " + Id + " " + Coord.X + " " + Coord.Y + " " + Desc + " " + Busy + " " + Score;