/*=============================================================================

  Project:   SharpImage
  Module:    siGdiRendererForm.cs
  Language:  C#
  Author:    Dan Mueller
  Date:      $Date: 2007-09-06 06:52:16 +1000 (Thu, 06 Sep 2007) $
  Revision:  $Revision: 23 $

  Copyright (c) Queensland University of Technology (QUT) 2007.
  All rights reserved.

  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the above copyright notices for more information.
  
=============================================================================*/

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

namespace SharpImage.Rendering
{
    public partial class siGdiRendererForm : siRendererForm
    {
        public siGdiRendererForm() : base(new Panel())
        {
            // Set form control style
            this.SetStyle(ControlStyles.UserPaint, true);
            this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            this.SetStyle(ControlStyles.DoubleBuffer, true);
            
            // Call the designer code
            InitializeComponent();
        }

        /// <summary>
        /// Force the Form to repaint.
        /// </summary>
        public override void Repaint()
        {
            // Ensure the width and height are greater than 0
            if (this.ViewportSize.Width > 0 &&
                this.ViewportSize.Height > 0)
            {
                // Create a bitmap to allow double buffer rendering
                Bitmap bitmapOffscreen = new Bitmap(this.ViewportSize.Width, this.ViewportSize.Height);
                Graphics graphicsOffscreen = Graphics.FromImage(bitmapOffscreen);
                graphicsOffscreen.Clear(this.BackColor);

                // Fire the Paint event using the offscreen bitmap
                this.OnPaint(new PaintEventArgs(graphicsOffscreen, this.ViewportRectangle));

                // All the event handlers have had their chance to paint to the
                // offscreen bitmap - now draw this bitmap to the form
                Graphics graphicsRepaintableArea = this.RenderingControl.CreateGraphics();
                graphicsRepaintableArea.DrawImage(bitmapOffscreen, 0, 0);
            }
        }
    }
}