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

namespace DividerPanel
{
    /// <summary>
    /// My First Control.
    /// </summary>
    [ToolboxItem(true)]
    [ToolboxBitmap(typeof(MyFirstControl))]
    public class MyFirstControl : System.Windows.Forms.Control
    {

        private System.Drawing.Drawing2D.GraphicsPath graphicsPath = new GraphicsPath(System.Drawing.Drawing2D.FillMode.Alternate);

        private Color backColor = Color.Black;

        public MyFirstControl()
        {
            this.graphicsPath.AddPolygon(new Point[]{
                                                new Point(10, 0),
                                                new Point(10, 10),
                                                new Point(0, 10),
                                                new Point(0, 90),
                                                new Point(10, 90),
                                                new Point(10, 100),
                                                new Point(190, 100),
                                                new Point(190, 90),
                                                new Point(200, 90),
                                                new Point(200, 10),
                                                new Point(190, 10),
                                                new Point(190, 0)
                                            });

            this.Region = new Region(graphicsPath);
        }

        private void InitializeComponent()
        {
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            LinearGradientBrush b = new LinearGradientBrush(this.ClientRectangle,
                this.backColor, this.backColor, 0, false);
              
            e.Graphics.FillRectangle(b, this.ClientRectangle);
        }

        protected override void OnGotFocus(EventArgs e)
        {
            base.OnGotFocus (e);
            this.backColor = Color.Red;
            this.Invalidate();
        }

        protected override void OnLostFocus(EventArgs e)
        {
            base.OnLostFocus (e);
            this.backColor = Color.Black;
            this.Invalidate();
        }

        protected override void OnClick(EventArgs e)
        {
            base.OnClick (e);

            this.Focus();
        }

    }
}