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

namespace Mandelbrot
{
    static class Program
    {
        static void Main()
        {
            Application.Run(new Scherm());
        }

        class Scherm : Form
        {
            // Declaraties
            public TextBox midxtext;
            public TextBox midytext;
            public TextBox maxtext;
            public TextBox schaaltext;
            public Label middenx;
            public Label middeny;
            public Label schaal;
            public Label max;
            public Button okbutton;
            public Button resetbutton;
            public Label check;
            public bool getekend = false;
            public Bitmap bitmapscherm;

            public Scherm()
            {
                // Nieuwe objecten aanmaken (soort van)
                this.midxtext = new TextBox();
                this.midytext = new TextBox();
                this.maxtext = new TextBox();
                this.schaaltext = new TextBox();
                this.middenx = new Label();
                this.middeny = new Label();
                this.schaal = new Label();
                this.max = new Label();
                this.okbutton = new Button();
                this.resetbutton = new Button();
                this.check = new Label();
                this.bitmapscherm = new Bitmap(400, 400);
                this.BackColor = Color.Black;

                /***************/
                //Eigenschappen//
                /***************/


                // Textbox: midxtext
                this.midxtext.Location = new Point(72, 6);
                this.midxtext.Name = "midxtext";
                this.midxtext.Size = new Size(90, 20);
                this.midxtext.Text = "0"; ;

                // Textbox: midytext
                this.midytext.Location = new Point(72, 32);
                this.midytext.Name = "midytext";
                this.midytext.Size = new Size(90, 20);
                this.midytext.TabIndex = 1;
                this.midytext.Text = "0";

                // Textbox: maxtext
                this.maxtext.Location = new Point(293, 32);
                this.maxtext.Name = "maxtext";
                this.maxtext.Size = new Size(52, 20);
                this.maxtext.TabIndex = 2;
                this.maxtext.Text = "100";

                // Textbox: schaaltext
                this.schaaltext.Location = new Point(293, 6);
                this.schaaltext.Name = "schaaltext";
                this.schaaltext.Size = new Size(120, 20);
                this.schaaltext.TabIndex = 3;
                this.schaaltext.Text = "0,01";

                // Label: middenx
                this.middenx.AutoSize = true;
                this.middenx.Location = new Point(12, 9);
                this.middenx.Name = "middenx";
                this.middenx.Size = new Size(55, 13);
                this.middenx.TabIndex = 4;
                this.middenx.Text = "Midden X:";
                this.middenx.ForeColor = Color.White;
                this.middenx.BackColor = Color.Black;

                // Label: middeny
                this.middeny.AutoSize = true;
                this.middeny.Location = new Point(12, 35);
                this.middeny.Name = "middeny";
                this.middeny.Size = new Size(55, 13);
                this.middeny.TabIndex = 5;
                this.middeny.Text = "Midden Y:";
                this.middeny.ForeColor = Color.White;
                this.middeny.BackColor = Color.Black;

                // Label: schaal
                this.schaal.AutoSize = true;
                this.schaal.Location = new Point(244, 9);
                this.schaal.Name = "schaal";
                this.schaal.Size = new Size(43, 13);
                this.schaal.TabIndex = 6;
                this.schaal.Text = "Schaal:";
                this.schaal.ForeColor = Color.White;
                this.schaal.BackColor = Color.Black;

                // Label: max
                this.max.AutoSize = true;
                this.max.Location = new Point(244, 32);
                this.max.Name = "max";
                this.max.Size = new Size(30, 13);
                this.max.TabIndex = 7;
                this.max.Text = "Max:";
                this.max.ForeColor = Color.White;
                this.max.BackColor = Color.Black;

                // Button: OK
                this.okbutton.Location = new Point(351, 29);
                this.okbutton.Name = "okbutton";
                this.okbutton.Size = new Size(62, 23);
                this.okbutton.TabIndex = 8;
                this.okbutton.Text = "OK";
                this.okbutton.UseVisualStyleBackColor = true;
                this.okbutton.BackColor = Color.White;

                // Button: Reset
                this.resetbutton.Location = new Point(13, 480);
                this.resetbutton.Name = "resetbutton";
                this.resetbutton.Size = new Size(62, 23);
                this.resetbutton.TabIndex = 9;
                this.resetbutton.Text = "Reset";
                this.resetbutton.UseVisualStyleBackColor = true;
                this.resetbutton.BackColor = Color.White;

                /***********************/
                // Einde eigenschappen //
                /***********************/

                this.ClientSize = new Size(425, 530);
                this.Text = "Mandelbrot";

                // Events
                this.Paint += this.bouwScherm;
                this.okbutton.Click += this.okklik;
                this.resetbutton.Click += this.resetklik;
                this.MouseClick += this.zoomin;


                // Controls.Add
                this.Controls.Add(this.okbutton);
                this.Controls.Add(this.resetbutton);
                this.Controls.Add(this.max);
                this.Controls.Add(this.schaal);
                this.Controls.Add(this.middeny);
                this.Controls.Add(this.middenx);
                this.Controls.Add(this.schaaltext);
                this.Controls.Add(this.maxtext);
                this.Controls.Add(this.midytext);
                this.Controls.Add(this.midxtext);
                this.Controls.Add(this.check);


                //Enter = knop indrukken
                this.AcceptButton = okbutton;
                Invalidate();
            }

            public void okklik(object o, EventArgs e)
            {
                Invalidate();
            }

            public void resetklik(object o, EventArgs e)
            {
                midxtext.Text = "0";
                midytext.Text = "0";
                schaaltext.Text = "0,01";
                maxtext.Text = "100";
                Invalidate();
            }


            public void zoomin(object o, MouseEventArgs e)
            {
                if (e.X >= 13 && e.Y >= 69 && e.X <= 413 && e.Y <= 469)
                {
                    double midx = double.Parse(midxtext.Text);
                    double midy = double.Parse(midytext.Text);
                    double schaal = double.Parse(schaaltext.Text);
                    midx = (midx - 213 * schaal) + (e.X * schaal);
                    midy = (midy + 269 * schaal) - (e.Y * schaal);
                    schaal = schaal / 2;
                    this.schaaltext.Text = schaal.ToString();
                    this.midxtext.Text = midx.ToString();
                    this.midytext.Text = midy.ToString();
                    Invalidate();
                }
            }

            public void bouwScherm(object o, PaintEventArgs pea)
            {
                double xxx = double.Parse(midxtext.Text);
                double yyy = double.Parse(midytext.Text);
                int x = 0;
                int y = 0;
                double schaal = double.Parse(schaaltext.Text);
                pea.Graphics.DrawImage(bitmapscherm, 13, 69, 400, 400);
                while (y <= 399)
                {
                    double y2 = (yyy + 200 * schaal) - y * schaal;
                    while (x <= 399)
                    {
                        double x2 = (xxx - 200 * schaal) + x * schaal;
                        int mandelgetal = mandelFormule(x2, y2);
                        bitmapscherm.SetPixel(x, y, Color.FromArgb(2 * mandelgetal % 255, 3 * mandelgetal % 255, mandelgetal % 255));
                        x++;
                    }
                    x = 0;
                    y++;
                    pea.Graphics.DrawImage(bitmapscherm, 13, 69, 400, 400);
                }
            }

            private int mandelFormule(double x, double y)
            {
                double a1 = 0.0;
                double a = 0.0;
                double b = 0.0;
                double pyth = 0.0;
                int teller = 0;
                double max = int.Parse(maxtext.Text);

                while (pyth <= 2 && teller < max)
                {
                    a1 = a * a - b * b + x;
                    b = 2 * a * b + y;
                    a = a1;
                    pyth = Math.Sqrt(a * a + b * b);
                    teller++;
                }
                return teller;
            }
        }
    }
}