using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Metis.AutoAnalysis
{
    internal class MeasureRangeControl : UserControl
    {
        float _scal;
        float w;
        float h;
        private SampleStageModel _setting;
        private float offxGrid;
        private float offxC;
        private float offyGrid;
        private float offyC;

        float _dia => _setting.Diameter;
        private float _width => _setting.Width;
        private float _height => _setting.Height;

        //added by songxk begin
        public enum MovingMethodEnum
        {
            Hor_Plus = 1,
            Hor_Minus = 2,
            Ver_Plus = 3,
            Ver_Minus = 4
        };

        public MovingMethodEnum MovingMothed { get; set; }
        public float MeasureHeight { get; set; }

        public event EventHandler ChangeEvent;
        //added by songxk end

        public MeasureRangeControl()
        {
            Paint += MeasureRangeControl_Paint;
        }
        public void InitGrid(SampleStageModel stageSettingNow)
        {
            _setting = stageSettingNow;
            _scal = Math.Min(Parent.Width / _width, Parent.Height / _height);
            _scal = Math.Min(Parent.Height / _dia, _scal);
            offxGrid = 0;
            offxC = 0;
            offyGrid = 0;
            offyC = 0;
            if (_dia > _width)
            {
                offxGrid = (float)((_dia - _width) * _scal) / 2;
            }
            else
            {
                offxC = (float)((_width - _dia) * _scal) / 2;
            }
            if (_dia > _height)
            {
                offyGrid = (float)((_dia - _height) * _scal) / 2;
            }
            else
            {
                offyC = (float)((_height - _dia) * _scal) / 2;
            }
            Invalidate();
        }

        public  void Reset()
        {
            _setting = null;
            Invalidate();
        }

        private void MeasureRangeControl_Paint(object sender, PaintEventArgs e)
        {
            if (_setting == null) return;
            var pen = new Pen(Color.Red);
            pen.Width = 2;
            pen.DashStyle = DashStyle.Dash;
            var bursh = new SolidBrush(Color.White);
            var g = e.Graphics;
            g.FillEllipse(bursh, offxC, offyC, _dia * _scal, _dia * _scal);
            g.DrawRectangle(pen, offxGrid, offyGrid, _width * _scal, _height * _scal);
        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            switch (keyData)
            {
                case Keys.Left:
                    MovingMothed = MovingMethodEnum.Hor_Minus;
                    ChangeEvent(this, new EventArgs());
                    break;
                case Keys.Up:
                    MovingMothed = MovingMethodEnum.Ver_Plus;
                    ChangeEvent(this, new EventArgs());
                    break;
                case Keys.Right:
                    MovingMothed = MovingMethodEnum.Hor_Plus;
                    ChangeEvent(this, new EventArgs());
                    break;
                case Keys.Down:
                    MovingMothed = MovingMethodEnum.Ver_Minus;
                    ChangeEvent(this, new EventArgs());
                    break;
                default:
                    break;
            }

            return base.ProcessCmdKey(ref msg, keyData);
        }

    }
}