CirclePackForm.cs

CSsharp Example:

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;


namespace CirclePack
{
   public partial class CirclePackForm : Form
   {
      private int _circleCount;
      private double _radius;
      private double[] _xValues;
      private double[] _yValues;

      private int _xRect = 150;
      private int _yRect = 50;
      private int _rectSize = 400;


      public CirclePackForm()
      {
         InitializeComponent();
         ClearSolutionValues();
      }


      void ClearSolutionValues()
      {
         _circleCount = 5;
         _radius = 0.0;
         _xValues = new double[0];
         _yValues = new double[0];
      }

      private void DrawCircles(int circleCount, double radius, double[] xValues, double[] yValues, Graphics graph)
      {
         double size = 200;
         float xi, yi;
         float rad = (float)(2 * size * radius);

         Pen blackPen = new Pen(Color.Black, 2);
         graph.DrawRectangle(blackPen, _xRect, _yRect, _rectSize, _rectSize);
         blackPen.Dispose();
         graph.SmoothingMode = SmoothingMode.AntiAlias;
         blackPen = new Pen(Color.Black, 1);
         Brush redBrush = new SolidBrush(Color.PaleVioletRed);
         for (int i = 0; i < circleCount; i++)
         {
            xi = (float)(_xRect + size * (1.0 + xValues[i] - radius));
            yi = (float)(_yRect + size * (1.0 + yValues[i] - radius));
            graph.FillEllipse(redBrush, xi, yi, rad, rad);
            graph.DrawEllipse(blackPen, xi, yi, rad, rad);
         }
         blackPen.Dispose();
         redBrush.Dispose();
      }


      private void CirclePackForm_Paint(object sender, PaintEventArgs e)
      {
         Graphics graph = e.Graphics;
         if ((_circleCount > 0) && (_radius != 0.0))
            DrawCircles(_circleCount, _radius, _xValues, _yValues, graph);
         else
         {
            Brush grayBrush = new SolidBrush(Color.Gray);
            graph.FillRectangle(grayBrush, _xRect, _yRect, _rectSize, _rectSize);
            grayBrush.Dispose();
         }
         graph.Dispose();
      }


      private void btnSolve_Click(object sender, EventArgs e)
      {
         ClearSolutionValues();
         if (txtCircles.Text.Length > 0)
         {
            _circleCount = Convert.ToInt32(txtCircles.Text);
         }
         MplCirclePack cpMpl = new MplCirclePack();
         bool result = cpMpl.SolveModel("LGO", _circleCount);
         if (!result) {
             MessageBox.Show("There is no solution available with this input.\n" +
                        "The solver returned the following message: \n\n" +
                        cpMpl.ResultString);
         }
         _radius = cpMpl.Radius;
         _xValues = cpMpl.XValues;
         _yValues = cpMpl.YValues;
         this.Refresh();
      }


      private void btnClear_Click(object sender, EventArgs e)
      {
         ClearSolutionValues();
         this.Refresh();
      }


   }
}