using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace _06_Hodiny
{
    public partial class Form1 : Form
    {
        Thread thread;
        Graphics graphics01;
        Graphics graphics02;
        Bitmap bitmap;

        bool drawing = true;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            bitmap = new Bitmap(580, 580);
            graphics01 = Graphics.FromImage(bitmap);
            graphics02 = CreateGraphics();
            thread = new Thread(Draw);
            thread.IsBackground = true;
            thread.Start();

            //graphics01.RotateTransform(-99);
            //graphics02.RotateTransform(-99);
        }

        public void Draw()
        {
            float angle = 0.0f;
            float angleM = 0.0f;
            float angleH = 0.0f;
            PointF pointF = new PointF(250, 250);
            float rad = 250;
            Pen pen = new Pen(Color.Azure, 3.0f);
            RectangleF area = new RectangleF(30, 30, 500, 500);
            RectangleF circle = new RectangleF(0, 0, 50, 50);
            RectangleF circleM = new RectangleF(0, 0, 50, 50);
            RectangleF circleH = new RectangleF(0, 0, 50, 50);

            PointF loc = PointF.Empty;
            PointF img = new PointF(20, 20);

            graphics02.Clear(Color.Black);

            while (drawing)
            {
                graphics01.Clear(Color.Black);

                graphics01.DrawEllipse(pen, area);
                loc = CirclePoint(rad, angle, pointF);

                circle.X = loc.X - (circle.Width / 2) + area.X;
                circle.Y = loc.Y - (circle.Height / 2) + area.Y;

                loc = CirclePoint(rad, angleM, pointF);

                circleM.X = loc.X - (circleM.Width / 2) + area.X;
                circleM.Y = loc.Y - (circleM.Height / 2) + area.Y;

                loc = CirclePoint(rad, angleH, pointF);

                circleH.X = loc.X - (circleH.Width / 2) + area.X;
                circleH.Y = loc.Y - (circleH.Height / 2) + area.Y;

                //graphics01.DrawEllipse(pen, circle);
                graphics01.DrawLine(pen, 275, 275, circle.X + 25, circle.Y + 25);
                graphics01.DrawLine(pen, 275, 275, circleM.X + 25, circleM.Y + 25);
                graphics01.DrawLine(pen, 275, 275, circleH.X + 25, circleH.Y + 25);

                graphics02.DrawImage(bitmap, img);

                if (angle < 360)
                {
                    angle += 6;
                }
                else if (angle == 360)
                {
                    angle = 0;
                    angleM += 6;
                }
                else if (angleM == 360)
                {
                    angleM = 0;
                    angleH += 6;
                }
                else if (angleH == 360)
                {
                    angleH = 0;
                }

                Thread.Sleep(1000);
            }
        }

        public PointF CirclePoint(float radius, float angleIsDangre, PointF original)
        {
            float x = (float)(radius * Math.Cos(angleIsDangre * Math.PI / 180F)) + original.X;
            float y = (float)(radius * Math.Sin(angleIsDangre * Math.PI / 180F)) + original.Y;

            return new PointF(x, y);
        }
    }
}