Create PolygonFigure.cs

DrawFigureLibrary/Figures/PolygonFigure.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Media;
+
+namespace DrawFigureLibrary.Figures
+{
+    public class PolygonFigure : Figure
+    {
+        public Point[] Points { get; private set; }
+
+        public PolygonFigure(string name, Point[] points) : base(name, 0, 0, 0, 0)
+        {
+            if (points == null || points.Length < 3) throw new ArgumentException("Многоугольник должен иметь минимум 3 точки.");
+
+            Points = points;
+            RecalcBounds();
+        }
+
+        private void RecalcBounds()
+        {
+            double minX = Points.Min(p => p.X);
+            double minY = Points.Min(p => p.Y);
+            double maxX = Points.Max(p => p.X);
+            double maxY = Points.Max(p => p.Y);
+
+            x = (int)minX;
+            y = (int)minY;
+            w = (int)(maxX - minX);
+            h = (int)(maxY - minY);
+        }
+
+        public override void Draw(DrawingContext drawingContext)
+        {
+            StreamGeometry g = new StreamGeometry();
+            using (var ctx = g.Open())
+            {
+                ctx.BeginFigure(Points[0], isFilled: true, isClosed: true);
+                ctx.PolyLineTo(Points.Skip(1).ToArray(), isStroked: true, isSmoothJoin: false);
+            }
+            drawingContext.DrawGeometry(null, Init.pen, g);
+        }
+
+        public override void MoveBy(int deltaX, int deltaY)
+        {
+            if (Init.DrawingImage == null) return;
+
+            if (Check(this, deltaX, deltaY, Init.DrawingImage))
+            {
+                for (int i = 0; i < Points.Length; i++) Points[i] = new Point( Points[i].X + deltaX, Points[i].Y + deltaY );
+
+                RecalcBounds();
+            }
+        }
+    }
+}