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

public partial class ImageContainer : Form
{
    private Image image;
    private Bitmap bitmap;
    private bool shouldPaint = false;
    private int startX = -1;
    private int startY;
    int endX;
    int endY;
    private Rectangle selectedROI = new Rectangle(-1,-1,0,0);
  
    public ImageContainer(Image im)
    {
        InitializeComponent();
        image = im;
        bitmap = new Bitmap(image);
    }

    public ImageContainer(Bitmap b)
    {
        InitializeComponent();
        bitmap = b;
    }


    public Image Image
    {
        get { return image; }

        set{ image = value;}
    }

    public Bitmap Bitmap
    {
        get { return bitmap; }

        set { bitmap = value; }
    }

    public Rectangle ROI
    {
        get
        {
            return selectedROI;
        }
    }

    private void ImageContainer_Paint(object sender, PaintEventArgs e)
    {
        Graphics graphics = e.Graphics;       
        graphics.DrawImage(bitmap,0,0);
    }

    private void ImageContainer_MouseDown(object sender, MouseEventArgs e)
    {
        shouldPaint = true;
        Graphics graphics = CreateGraphics();
        graphics.DrawImage(bitmap,0,0);
    }

    private void ImageContainer_MouseUp(object sender, MouseEventArgs e)
    {
        shouldPaint = false;
        startX = -1;
    }

    private void ImageContainer_MouseMove(object sender, MouseEventArgs e)
    {
        if (shouldPaint)
        {
            if (startX == -1)
            {
                startX = e.X; startY = e.Y;
            }
            else
            {
                endX = e.X;
                endY = e.Y;
                Graphics graphics = CreateGraphics();
                graphics.DrawImage(bitmap,0,0);
                Pen whitePen = new Pen(Color.White, 1);
                graphics.DrawRectangle(whitePen, new Rectangle(startX, startY, endX - startX, endY - startY));
                selectedROI.X = startX;
                selectedROI.Y = startY;
                selectedROI.Width = endX - startX;
                selectedROI.Height = endY - startY;
            }
        }
    }
}