I am a relative beginner in XNA and am trying to create a screenManager for an C# XNA game. Everything in my code seems to work fine until I reach the LoadContent method in my MainMenu class which derives from Screen which is a custom standalone class. This is where I get my GraphicsDevice component not found ContentLoad exception.
This is on the the statement: texture = c.Load<Texture2D>("Textures/Start");
where c is a ContentManager.
This statement and the program works okay if I put it in the Update method of my class. However, I only want to load this texture once, not with each call to Update(GameTime). I think I must be calling load before some Content info is being initialized but I'm not sure what. There are some commented out statements in MainMenu.LoadContent that do pretty much the same thing and all produce the same error. I'm posting my entire code here. Hope it isn't flooding the forum.
Here's Game1.cs:
namespace RoomGame
{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
public static GraphicsDeviceManager graphics;
SpriteBatch spriteBatch;
GameController gameController;
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
gameController = new GameController(this,this.Content);
this.Components.Add(gameController);
}
}
}
GameController.cs:
namespace RoomGame
{
public class GameController : DrawableGameComponent
{
public Game game;
public ContentManager content;
public ScreenController screenController;
public MainMenu menu;
public GameController(Game game,ContentManager c)
: base(game)
{
this.game = game;
content = c;
screenController = new ScreenController(this);
menu = new MainMenu(this,this.content);
screenController.AddScreen(menu);
}
public override void Initialize()
{
base.Initialize();
screenController.Initialize();
}
protected override void LoadContent()
{
base.LoadContent();
}
protected override void UnloadContent()
{
base.UnloadContent();
}
public override void Update(GameTime gameTime)
{
screenController.Update(gameTime);
base.Update(gameTime);
}
public override void Draw(GameTime gameTime)
{
base.Draw(gameTime);
screenController.Draw(gameTime);
}
}
}
screenController.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
namespace RoomGame
{
public class ScreenController
{
public List<Screen> screens = new List<Screen>();
GameController gameController;
SpriteBatch spriteBatch;
public ScreenController(GameController gc)
{
this.gameController = gc;
}
public void Initialize()
{
spriteBatch = new SpriteBatch(this.gameController.GraphicsDevice);
}
public void Update(GameTime gameTime)
{
foreach (Screen screen in screens)
{
if (screen.isUpdating)
screen.Update(gameTime);
}
}
public void Draw(GameTime gameTime)
{
foreach (Screen screen in screens)
{
if (screen.isDrawn)
{
spriteBatch.Begin();
screen.Draw(gameTime,spriteBatch);
spriteBatch.End();
}
}
}
public void AddScreen(Screen screen)
{
if (!screens.Contains(screen))
{
screen.LoadContent(this.gameController.game.Content);
screens.Add(screen);
//screen.Initialize();
}
}
}
}
Screen.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Content;
namespace RoomGame
{
public class Screen
{
public ScreenController screenController;
public bool isUpdating=true;
public bool isDrawn=true;
public GraphicsDeviceManager graphics;
/*public Screen(ScreenController sc)
{
this.screenController = sc;
this.isActive = true;
}*/
public virtual void Initialize()
{ }
public virtual void LoadContent(ContentManager c)
{ }
public virtual void Update(GameTime gameTime)
{ }
public virtual void Draw(GameTime gameTime,SpriteBatch sb)
{ }
}
}
MainMenu.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Content;
namespace RoomGame
{
public class MainMenu : Screen
{
GameController gameController;
Texture2D texture;
Vector2 position;
ContentManager content;
//public GraphicsDeviceManager graphics;
public MainMenu(GameController gc,ContentManager c)
{
this.gameController = gc;
this.content = c;
this.isUpdating = true;
this.isDrawn = true;
//this.graphics = this.gameController.game.graphics;
}
public override void LoadContent(ContentManager c)
{
texture = c.Load<Texture2D>("Textures/Start");
//texture = this.gameController.game.Content.Load<Texture2D>("Textures/Start");
//texture=this.gameController.content.Load<Texture2D>("Textures/Start");
//texture = this.gameController.Game.Content.Load<Texture2D>("Textures/Start");
}
public override void Update(GameTime gameTime)
{
//texture = this.gameController.content.Load<Texture2D>("Textures/Start");
position = new Vector2(100, 100);
}
public override void Draw(GameTime gameTime,SpriteBatch sb)
{
sb.Draw(texture, position, Color.White);
}
}
}
Thanks in advance....
EDIT
I found my error. I was calling ScreenController.Add before the LoadContent in GameController. I put it after the base.LoadContent in gameController and it works now. I hope this can help somebody but if anyone know a better way of approaching this please let me know.