89 lines
3.1 KiB
C#
89 lines
3.1 KiB
C#
using System;
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using System.Drawing;
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namespace Shapes
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{
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public class Circle : Shape
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{
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public Point Center { get; private set; }
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public double Radius { get; private set; }
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public override Color Fill { get; set; }
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public override Color Color { get; set; }
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public override double Height { get; }
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public override double Width { get; }
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/**
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* Constructor with x-y Location for center
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*
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* @param x The x-location of the center of the circle -- must be a valid double
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* @param y The y-location of the center of the circle
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* @param radius The radius of the circle -- must be greater or equal to zero.
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* @throws ShapeException The exception thrown if the x, y, or z are not valid
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*/
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public Circle(double x, double y, double radius)
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{
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Validator.ValidatePositiveDouble(radius, "Invalid radius");
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Center = new Point(x, y);
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Radius = radius;
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Color = Color.Black;
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Fill = Color.White;
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Height = radius * 2;
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Width = radius * 2;
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}
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/**
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* Constructor with a Point for center
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*
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* @param center The x-location of the center of the circle -- must be a valid point
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* @param radius The radius of the circle -- must be greater or equal to zero.
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* @throws ShapeException The exception thrown if the x, y, or z are not valid
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*/
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public Circle(Point center, double radius) {
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Validator.ValidatePositiveDouble(radius, "Invalid radius");
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if (center == null)
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throw new ShapeException("Invalid center point");
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Center = center;
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Radius = radius;
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Color = Color.Black;
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Fill = Color.White;
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Height = radius * 2;
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Width = radius * 2;
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}
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/**
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* Move the circle
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* @param deltaX a delta change for the x-location of center of the circle
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* @param deltaY a delta change for the y-location of center of the circle
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* @throws ShapeException Exception thrown if either the delta x or y are not valid doubles
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*/
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public void Move(double deltaX, double deltaY)
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{
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Center.Move(deltaX, deltaY);
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}
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/**
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* Scale the circle
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*
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* @param scaleFactor a non-negative double that represents the percentage to scale the circle.
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* 0>= and <1 to shrink.
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* >1 to grow.
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* @throws ShapeException Exception thrown if the scale factor is not valid
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*/
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public override void Scale(double scaleFactor)
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{
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Validator.ValidatePositiveDouble(scaleFactor, "Invalid scale factor");
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Radius *= scaleFactor;
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}
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/**
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* @return The area of the circle.
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*/
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public override double ComputeArea()
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{
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return Math.PI * Math.Pow(Radius, 2);
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}
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}
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} |