using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Collections;

namespace Smart.Utility
{
    public class Drawing
    {
        public class signature : Control
        {
            Bitmap _bmp;
            Point _previouspoint = new Point();
            ArrayList _points;
            ArrayList _lines = new ArrayList();
            Graphics _g;
            Pen _pen = new Pen(Color.Black, 2);
            Boolean _Enable = false;
            int _picWidth = 0;
            int _picHeight = 0;

            protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
            {
                if (_Enable == true)
                {
                    _previouspoint.X = e.X;
                    _previouspoint.Y = e.Y;

                    _points = new ArrayList();
                    _points.Add(_previouspoint);
                }
            }

            protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
            {
                if (_Enable == true)
                {
                    _points.Add(new Point(e.X, e.Y));
                    _g.DrawLine(_pen, _previouspoint.X, _previouspoint.Y,
                                e.X, e.Y);
                    _previouspoint.X = e.X;
                    _previouspoint.Y = e.Y;
                    Invalidate();
                }
            }

            protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
            {
                if (_Enable == true)
                {
                    Int32 _count = _points.Count - 1;
                    Point[] pts = new Point[_count];
                    for (int i = 0; i < _points.Count - 1; i++)
                    {
                        pts[i] = (Point)_points[i];
                    }
                    _lines.Add(pts);
                }
            }

            public void Initsignature(string bmpLocation)
            {
                String path = bmpLocation;
                _bmp = new Bitmap(path);
                _picHeight = _bmp.Height;
                _picWidth = _bmp.Width;
                _g = Graphics.FromImage(_bmp);
                Invalidate();
            }

            protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
            {
                e.Graphics.DrawImage(_bmp, 0, 0);
            }

            protected override void OnPaintBackground(System.Windows.Forms.PaintEventArgs e)
            {
            }

            public Boolean Enable
            {
                get { return _Enable; }
                set { _Enable = value; }
            }

            private void DrawSignature()
            {
                for (int line = 0; line <= _lines.Count - 1; line++)
                {
                    Point[] pts = (Point[])_lines[line];
                    for (int i = 1; i <= pts.Length - 1; i++)
                    {
                        _g.DrawLine(_pen,
                            pts[i - 1].X,
                            pts[i - 1].Y,
                            pts[i].X,
                            pts[i].Y);
                    }
                }
                Invalidate();
            }

            public string Signature
            {
                get
                {
                    System.Text.StringBuilder sb = new System.Text.StringBuilder();
                    foreach (Point[] ar in _lines)
                    {
                        foreach (Point pt in ar)
                        {
                            sb.Append(pt.X.ToString() + "," + pt.Y.ToString() + "|");
                        }
                        sb.Append("@");
                    }
                    return sb.ToString();
                }
                set
                {
                    _lines.Clear();
                    Char[] valueDeliminator = { '@' };
                    Char[] lineDeliminator = { '|' };
                    Char[] pointDeliminator = { ',' };

                    string[] lines = value.Split(valueDeliminator);

                    for (int i = 0; i <= lines.Length - 2; i++)
                    {
                        string[] ps = lines[i].Split(lineDeliminator);

                        Point[] points = new Point[ps.Length - 2];
                        for (int j = 0; j < ps.Length - 2; j++)
                        {
                            string[] xy = ps[j].Split(pointDeliminator);
                            points[j] = new Point(Convert.ToInt32(xy[0]), Convert.ToInt32(xy[1]));
                        }
                        _lines.Add(points);
                    }
                    DrawSignature();
                }
            }
        }
    }
}