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

namespace ProjetoSamu.TranspUtil
{

    public class TransparentImage : Control
    {

        private Bitmap imagem;

        protected override void OnPaintBackground(PaintEventArgs e)
        {
        }

        public void setImage(Bitmap img){
            imagem = img;
            this.Invalidate();
        }

        public Bitmap getImage()
        {
            return this.imagem;
        }

        private bool bPaintOnce = false;


        protected override void OnPaint(PaintEventArgs e)
        {
            if (!bPaintOnce)
            {
                bPaintOnce = true;

                this.Visible = false;
                this.Parent.Invalidate(this.Bounds);
                this.Parent.Update();
                this.Visible = true;
                return;
            }
            else
            {
                bPaintOnce = false;

                Graphics g = e.Graphics;

                //g.DrawImage(imagem, 0, 0);
                ImageAttributes iattrb = new ImageAttributes();
                Color transColor = imagem.GetPixel(0, 0);
                iattrb.SetColorKey(transColor, transColor);
                g.DrawImage(imagem, new Rectangle(0, 0, imagem.Width, imagem.Height), 0, 0, imagem.Width, imagem.Height, GraphicsUnit.Pixel, iattrb);

                g.Dispose();
            }

        }
    }

}