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Root/src/DrawableGameComponent.cs

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#region License
/* FNA - XNA4 Reimplementation for Desktop Platforms
 * Copyright 2009-2016 Ethan Lee and the MonoGame Team
 *
 * Released under the Microsoft Public License.
 * See LICENSE for details.
 */
#endregion
 
#region Using Statements
using System;
#endregion
 
namespace Microsoft.Xna.Framework
{
    public class DrawableGameComponent : GameComponent, IDrawable
    {
        #region Public Properties
 
        public Graphics.GraphicsDevice GraphicsDevice
        {
            get
            {
                return this.Game.GraphicsDevice;
            }
        }
 
        public int DrawOrder
        {
            get
            {
                return _drawOrder;
            }
            set
            {
                if (_drawOrder != value)
                {
                    _drawOrder = value;
                    if (DrawOrderChanged != null)
                    {
                        DrawOrderChanged(this, null);
                    }
                    OnDrawOrderChanged(this, null);
                }
            }
        }
 
        public bool Visible
        {
            get
            {
                return _visible;
            }
            set
            {
                if (_visible != value)
                {
                    _visible = value;
                    if (VisibleChanged != null)
                    {
                        VisibleChanged(this, EventArgs.Empty);
                    }
                    OnVisibleChanged(this, EventArgs.Empty);
                }
            }
        }
 
        #endregion
 
        #region Private Variables
 
        private bool _initialized;
        private int _drawOrder;
        private bool _visible = true;
 
        #endregion
 
        #region Public Constructors
 
        public DrawableGameComponent(Game game) : base(game)
        {
        }
 
        #endregion
 
        #region Events
 
        public event EventHandler<EventArgs> DrawOrderChanged;
        public event EventHandler<EventArgs> VisibleChanged;
 
        #endregion
 
        #region Public Methods
 
        public override void Initialize()
        {
            if (!_initialized)
            {
                _initialized = true;
                LoadContent();
            }
        }
 
        #endregion
 
        #region Pubilc Virtual Methods
 
        public virtual void Draw(GameTime gameTime)
        {
        }
 
        #endregion
 
        #region Protected Virtual Methods
 
        protected virtual void LoadContent()
        {
        }
 
        protected virtual void UnloadContent()
        {
        }
 
        protected virtual void OnVisibleChanged(object sender, EventArgs args)
        {
        }
 
        protected virtual void OnDrawOrderChanged(object sender, EventArgs args)
        {
        }
 
        #endregion
    }
}

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