‫پیاده سازی پروژه نقاشی (Paint) به صورت شی گرا 6#

using System;
using System.Drawing;

namespace PWS.ObjectOrientedPaint.Models
{
    /// <summary>
    /// Circle
    /// </summary>
    public class Circle : Ellipse
    {
#region Constructors (2) 

        /// <summary>
        /// Initializes a new instance of the <see cref="Circle" /> class.
        /// </summary>
        /// <param name="startPoint">The start point.</param>
        /// <param name="endPoint">The end point.</param>
        /// <param name="zIndex">Index of the z.</param>
        /// <param name="foreColor">Color of the fore.</param>
        /// <param name="thickness">The thickness.</param>
        /// <param name="isFill">if set to <c>true</c> [is fill].</param>
        /// <param name="backgroundColor">Color of the background.</param>
        public Circle(PointF startPoint, PointF endPoint, int zIndex, Color foreColor, byte thickness, bool isFill, Color backgroundColor)
        {
            float x = 0, y = 0;
            float width = Math.Abs(endPoint.X - startPoint.X);
            float height = Math.Abs(endPoint.Y - startPoint.Y);
            if (startPoint.X <= endPoint.X && startPoint.Y <= endPoint.Y)
            {
                x = startPoint.X;
                y = startPoint.Y;
            }
            else if (startPoint.X >= endPoint.X && startPoint.Y >= endPoint.Y)
            {
                x = endPoint.X;
                y = endPoint.Y;
            }
            else if (startPoint.X >= endPoint.X && startPoint.Y <= endPoint.Y)
            {
                x = endPoint.X;
                y = startPoint.Y;
            }
            else if (startPoint.X <= endPoint.X && startPoint.Y >= endPoint.Y)
            {
                x = startPoint.X;
                y = endPoint.Y;
            }
            StartPoint = new PointF(x, y);
            var side = Math.Max(width, height);
            EndPoint = new PointF(x + side, y + side);
            ShapeType = ShapeType.Circle;
            Zindex = zIndex;
            ForeColor = foreColor;
            Thickness = thickness;
            BackgroundColor = backgroundColor;
            IsFill = isFill;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="Circle" /> class.
        /// </summary>
        public Circle()
        {
            ShapeType = ShapeType.Circle;
        }

#endregion Constructors 

#region Methods (1) 

// Public Methods (1) 

        /// <summary>
        /// Points the in sahpe.
        /// </summary>
        /// <param name="point">The point.</param>
        /// <param name="tolerance">The tolerance.</param>
        /// <returns>
        ///   <c>true</c> if [has point in sahpe] [the specified point]; otherwise, <c>false</c>.
        /// </returns>
        public override bool HasPointInSahpe(PointF point, byte tolerance = 5)
        {
            float width = Math.Abs(EndPoint.X+tolerance - StartPoint.X-tolerance);
            float height = Math.Abs(EndPoint.Y+tolerance - StartPoint.Y-tolerance);
            float diagonal = Math.Max(height, width);
            float raduis = diagonal / 2;
            float dx = Math.Abs(point.X - (X + Width / 2));
            float dy = Math.Abs(point.Y - (Y + height / 2));
            return (dx + dy <= raduis);
        }

#endregion Methods 
    }
}