Hi, I'm currently building a
simple project to learn XNA and the way it's designed to be used.
So, I used the GameState tutorial, add my model and behaviours, and a simple DrawableGameComponent component to draw current FPS rate.
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| #region Using Statements
using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
#endregion
namespace AITC2
{
/// <summary>
/// This is A game component that is notified when it needs to draw itself.
/// It implements IDrawable.
/// </summary>
public partial class StatisticComponent : Microsoft.Xna.Framework.DrawableGameComponent
{
#region Fields
// To deals with content loading
ContentManager content;
// Text management
SpriteBatch spriteBatch;
SpriteFont font1;
Vector2 textPosition;
int frameRate = 0;
int frameCounter = 0;
TimeSpan elapsedTime = TimeSpan.Zero;
#endregion
public StatisticComponent(Game game, ContentManager content)
: base(game)
{
// TODO: Construct any child components here
this.content = content;
}
/// <summary>
/// Allows the game component to perform any initialization it needs to before starting
/// to run. This is where it can query for any required services and load content.
/// </summary>
public override void Initialize()
{
// TODO: Add your initialization code here
//Text position
textPosition = new Vector2(0, 0);
base.Initialize();
}
/// <summary>
/// Load graphics content specific to your component.
/// </summary>
protected override void LoadContent()
{
font1 = content.Load<SpriteFont>("Fonts\\Pescab");
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(this.Game.GraphicsDevice);
}
/// <summary>
/// Unload graphics content specific to your drawable component.
/// </summary>
protected override void UnloadContent()
{
}
/// <summary>
/// Allows the component to run logic such as updating the world,
/// checking for collisions, gathering input and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Update(GameTime gameTime)
{
//FPS Stuff
elapsedTime += gameTime.ElapsedGameTime;
if (elapsedTime > TimeSpan.FromSeconds(1))
{
elapsedTime -= TimeSpan.FromSeconds(1);
frameRate = frameCounter;
frameCounter = 0;
}
base.Update(gameTime);
}
/// <summary>
/// This is called when the component should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Draw(GameTime gameTime)
{
spriteBatch.Begin();
frameCounter++;
//format the stging
string output = string.Format("fps: {0}", frameRate);
// Draw the string
spriteBatch.DrawString(font1, output, textPosition, Color.LightGreen);
spriteBatch.End();
base.Draw(gameTime);
}
}
} |
When I quit my GameScreen (where the component is added), I get a "Cannot access a disposed object. Object name: 'Texture2D'." exception (line 116).
It's the only component that give such a result. Others (like FireParticleSystem from work fine.
I found a hack (removing the component before quiting) but it's not the clean way.
Any idea ?
