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

namespace Rasterbar
{
    public partial class rasterbar : UserControl
    {
        private Brush pensseli1;
        private Brush pensseli2;
        private Color alku;
        private Color loppu;

        public Color alkuvari
        {
            get { return alku; }
            set { alku = value; rasterbar_SizeChanged(this, null); }
        }
        public Color loppuvari
        {
            get { return loppu; }
            set { loppu = value; rasterbar_SizeChanged(this, null); }
        }
        
        public rasterbar()
        {
            InitializeComponent();
            alku = Color.FromArgb(50, 0, 0);
            loppu = Color.FromArgb(255, 0, 0);
            pensseli1 = new System.Drawing.Drawing2D.LinearGradientBrush(new Point(0, 0), new Point(0, this.ClientSize.Height), alku , loppu);
            pensseli2 = new System.Drawing.Drawing2D.LinearGradientBrush(new Point(0, 0), new Point(0, this.ClientSize.Height), loppu, alku);
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            Graphics canvas = e.Graphics;
            canvas.FillRectangle(pensseli1, 0,0,this.ClientSize.Width, this.ClientSize.Height/2);
            canvas.FillRectangle(pensseli2, 0, this.ClientSize.Height/2, this.ClientSize.Width, this.ClientSize.Height / 2);
            //base.OnPaint(e);
        }

        private void rasterbar_SizeChanged(object sender, EventArgs e)
        {
            pensseli1.Dispose();
            pensseli2.Dispose();
            pensseli1 = new System.Drawing.Drawing2D.LinearGradientBrush(new Point(0, 0), new Point(0, this.ClientSize.Height), alku, loppu);
            pensseli2 = new System.Drawing.Drawing2D.LinearGradientBrush(new Point(0, 0), new Point(0, this.ClientSize.Height), loppu, alku);
            Invalidate();
        }

        private void Parent_Resize(object sender, EventArgs e)
        {
            if (AutoSize)
            {
                this.Width = Parent.ClientSize.Width;
            }
        }

        private void rasterbar_ParentChanged(object sender, EventArgs e)
        {
            if (Parent != null)
            {
                Parent.Resize += new EventHandler(Parent_Resize);
                if (AutoSize) this.Width = Parent.ClientSize.Width;

            }
        }
    }
}