Implement Change Detection Drawing

CoopSweeper/GameTypes/Field.cs

@@ -21,20 +21,34 @@ namespace CoopSweeper.GameTypes
 
         public int CheckID { get; set; }
 
-        public DisplayState GetDisplayState()
+        public DisplayState DisplayState
         {
-            switch(State)
+            get
             {
-                case FieldState.QUESTIONMARK:
-                case FieldState.NONE:
-                case FieldState.FLAG: 
+                switch (State)
+                {
+                    case FieldState.QUESTIONMARK:
+                    case FieldState.NONE:
+                    case FieldState.FLAG:
                         return (DisplayState)State;
-                case FieldState.REVEALED: 
-                    if(ContainsBomb)
-                        return DisplayState.BOMB;
-                    return (DisplayState)SurroundingBombs;
+                    case FieldState.REVEALED:
+                        if (ContainsBomb)
+                            return DisplayState.BOMB;
+                        return (DisplayState)SurroundingBombs;
+                }
+                return DisplayState.ERROR;
             }
-            return DisplayState.ERROR;
+        }
+
+        public IField Clone()
+        {
+            return new Field()
+            {
+                State = State,
+                ContainsBomb = ContainsBomb,
+                SurroundingBombs = SurroundingBombs,
+                CheckID = CheckID
+            };
         }
     }
 }