EasyProgressBarPacket

using System;
using System.Drawing;
using System.Windows.Forms;
using System.ComponentModel;
using EasyProgressBarPacket.Components;

namespace EasyProgressBarPacket
{
    public class AnimatedEasyProgressControl : Control
    {
        #region Event

        /// <summary>
        /// Represents an event which occurs when the index of the active frame changed.
        /// </summary>
        [Description("Represents an event which occurs when the index of the active frame changed")]
        public event EventHandler<ReportTaskProgressEventArgs> FrameChanged;

        #endregion

        #region Instance Members

        private Image newFrameImage = null;
        private AniEasyProgressTaskManager easyProgressTaskManager = null;

        #endregion

        #region Constructor

        public AnimatedEasyProgressControl()
        {
            this.SetStyle(ControlStyles.Selectable, false);
            this.SetStyle(ControlStyles.ResizeRedraw, false);
            this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer |
                ControlStyles.SupportsTransparentBackColor | ControlStyles.UserPaint, true);

            // Object Initializer
            this.Size = new Size()
            {
                Width = 100,
                Height = 50
            };
        }

        #endregion

        #region Destructor

        ~AnimatedEasyProgressControl()
        {
            GC.SuppressFinalize(this);
        }

        #endregion

        #region Property

        /// <summary>
        /// Gets or Sets the task manager for painting this control.
        /// </summary>
        [Description("Gets or Sets the task manager for painting this control")]
        public AniEasyProgressTaskManager EasyProgressTaskManager
        {
            get { return easyProgressTaskManager; }
            set
            {
                try
                {
                    if (!value.Equals(easyProgressTaskManager))
                    {
                        if (easyProgressTaskManager != null)
                            easyProgressTaskManager.TaskProgress -= OnFrameChanged;

                        easyProgressTaskManager = value;
                        easyProgressTaskManager.TaskProgress += new EventHandler<ReportTaskProgressEventArgs>(OnFrameChanged);
                    }
                }
                catch (NullReferenceException)
                {
                    if (easyProgressTaskManager != null)
                        easyProgressTaskManager.TaskProgress -= OnFrameChanged;

                    easyProgressTaskManager = null;
                }
            }
        }

        #endregion

        #region Virtual Methods

        protected virtual void OnFrameChanged(object sender, ReportTaskProgressEventArgs e)
        {
            if (FrameChanged != null)
                FrameChanged(this, e);
            
            newFrameImage = e.GetActiveFrameImage;

            this.Invalidate();
            this.Update();
        }

        #endregion

        #region Override Methods
        
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                EasyProgressTaskManager = null;
            }

            base.Dispose(disposing);
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            if (Visible)
            {
                try
                {
                    if (newFrameImage != null)
                    {
                        Rectangle rct = this.ClientRectangle;
                        e.Graphics.DrawImageUnscaled(newFrameImage, rct);
                    }
                }
                catch { ;}
            }
        }

        #endregion
    }
}