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

namespace Drew.Gdi
{
    public class HatchStylePanel : Control
    {
        private const int Padding = 12;
        private const int RectangleHeight = 19;
        private const int RectangleWidth = 110;
        private const int HorizontalSpacing = 24;
        private const int VerticalSpacing = 34;

        public HatchStylePanel()
        {
            SetStyle(ControlStyles.DoubleBuffer | ControlStyles.ResizeRedraw, true);
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            Graphics g = e.Graphics;

            Font fnt = new Font("Arial", 8);

            Rectangle rect = new Rectangle(Padding, Padding, RectangleWidth, RectangleHeight);

            foreach (string name in Enum.GetNames(typeof(HatchStyle)))
            {
                HatchStyle hs = (HatchStyle)Enum.Parse(typeof(HatchStyle), name);
                using (HatchBrush myBrush = new HatchBrush(hs, Color.Black, Color.White))
                {
                    g.FillRectangle(myBrush, rect);
                    Rectangle rectThinLine = rect;
                    Rectangle rectThickLine = rect;
                    rectThinLine.Inflate(4, 4);
                    rectThickLine.Inflate(8, 8);
                    g.DrawRectangle(new Pen(myBrush, 1), rectThinLine);
                    g.DrawRectangle(new Pen(myBrush, 2), rectThickLine);
                }
                g.DrawString(name, fnt, Brushes.Black, rect.Left - 8, rect.Bottom + 10);

                // move down
                rect.Y += rect.Height + VerticalSpacing;

                // if we're off the bottom, start the next column
                if (rect.Bottom > Height)
                {
                    rect.X += rect.Width + HorizontalSpacing;
                    rect.Y = Padding;
                }
            }

            fnt.Dispose();
        }
    }
}