Sailboat/Sailboat/MoveToBorder.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Sailboat.MovementStrategy
+{
+    /// <summary>
+    /// Стратегия перемещения объекта к краю экрана
+    /// </summary>
+    public class MoveToBorder : AbstractStrategy
+    {
+        protected override bool IsTargetDestinaion()
+        {
+            var objParams = GetObjectParameters;
+            if (objParams == null)
+            {
+                return false;
+            }
+            return objParams.RightBorder <= FieldWidth &&
+                objParams.RightBorder + GetStep() >= FieldWidth &&
+                objParams.DownBorder <= FieldHeight &&
+                objParams.DownBorder + GetStep() >= FieldHeight;
+
+        }
+        protected override void MoveToTarget()
+        {
+            var objParams = GetObjectParameters;
+            if (objParams == null)
+            {
+                return;
+            }
+            var diffX = objParams.RightBorder - FieldWidth;
+            if (Math.Abs(diffX) > GetStep())
+            {
+                if (diffX > 0)
+                {
+                    MoveLeft();
+                }
+                else
+                {
+                    MoveRight();
+                }
+            }
+            var diffY = objParams.DownBorder - FieldHeight;
+            if (Math.Abs(diffY) > GetStep())
+            {
+                if (diffY > 0)
+                {
+                    MoveUp();
+                }
+                else
+                {
+                    MoveDown();
+                }
+            }
+        }
+    }
+}