/*
 * BigForest.java
 *
 * The pieces of BigForest that are different
 * from ForestFire
 *
 * written by mike slattery - sep 2003
 */

public class BigForest extends Applet implements Runnable
{
	Point dots[];
	
	// Keep track of which coords bufgr is
	// currently using
	static boolean world_coords = false;
	
	// Variables to track scrolling view window
	public static int view_x=0, view_y=0;
	public static final int VIEW_WIDTH = 400;
	public static final int VIEW_HEIGHT = 300;
	public static final int WORLD_WIDTH = 800;
	public static final int WORLD_HEIGHT = 1000;
	public static final int SCROLL_X = 100;
	public static final int SCROLL_Y = 100;
	

	public void run()
	{
            ...
			checkScrolling(tree.getBoundingBox());
            ...
	}
	
	public void checkScrolling(Rectangle r)
	{
	  // Adjust view window so that the rectangle
	  // r (in world coords) is inside the
	  // scrolling limits (if possible)
	  //
	  // Check horizontal scrolling
	  if (r.x < view_x + SCROLL_X)
	  {
	    view_x = r.x - SCROLL_X;
	    if (view_x < 0)
	      view_x = 0;
	  }
	  else if (r.x + r.width > view_x + VIEW_WIDTH - SCROLL_X)
	  {
	    view_x = r.x + r.width - VIEW_WIDTH + SCROLL_X;
	    if (view_x +VIEW_WIDTH > WORLD_WIDTH)
	      view_x = WORLD_WIDTH - VIEW_WIDTH;
	  }
	  // Check vertical scrolling
	  if (r.y < view_y + SCROLL_Y)
	  {
		view_y = r.y - SCROLL_Y;
		if (view_y < 0)
		  view_y = 0;
	  }
	  else if (r.y + r.height > view_y + VIEW_HEIGHT - SCROLL_Y)
	  {
		view_y = r.y + r.height - VIEW_HEIGHT + SCROLL_Y;
		if (view_y +VIEW_HEIGHT > WORLD_HEIGHT)
		  view_y = WORLD_HEIGHT - VIEW_HEIGHT;
	  }
	}

	public void setLevel1()
	{
		scenery = new Hittable[11];
		scenery[0] = new SceneSprite(SceneSprite.ROCK,
						150,100,rockImage,this);
		scenery[1] = new SceneSprite(SceneSprite.ROCK,
						30,270,rockImage,this);
		scenery[2] = new SceneSprite(SceneSprite.LAKE,
						420,550,lakeImage,this);
		scenery[3] = new SceneSprite(SceneSprite.ROCK,
						120,40,rockImage,this);
		scenery[4] = new SceneSprite(SceneSprite.ROCK,
						700,600,rockImage,this);
		scenery[5] = new SceneSprite(SceneSprite.ROCK,
						400,650,rockImage,this);
		scenery[6] = new SceneSprite(SceneSprite.ROCK,
						100,870,rockImage,this);
		scenery[7] = new WallSprite(0,0,5,WORLD_WIDTH);
		scenery[8] = new WallSprite(0,0,WORLD_HEIGHT,5);
		scenery[9] = new WallSprite(0,WORLD_HEIGHT-6,WORLD_HEIGHT,5);
		scenery[10] = new WallSprite(WORLD_WIDTH-6,0,5,WORLD_WIDTH);

		tree = new TreeSprite(5,5,scenery,treeImage,burnImage,this);
		fire = new FireSprite(320,100,scenery,tree,fireImage,smokeImage,this);
		// Create a bunch of random dots to make it easier to follow
		// movement
		dots = new Point[40];
		for (int i = 0; i < dots.length; i++)
		{
			int dot_x = (int)(Math.random()*WORLD_WIDTH);
			int dot_y = (int)(Math.random()*WORLD_HEIGHT);
			dots[i] = new Point(dot_x, dot_y);
		}
	}

	public void update(Graphics g)
	{
		paint(bufgr);
		// Set back to screen coords to be ready
		// for next frame
		useScreenCoords(bufgr);
		g.drawImage(buffer,0,0,this);

	}
	
	static final void useWorldCoords(Graphics g)
	{
	  if (!world_coords)
	  {  
	    g.translate(-view_x, -view_y);
	    world_coords = true;
	  }
	}
	
	static final void useScreenCoords(Graphics g)
	{
	  if (world_coords)
	  {
	    g.translate(view_x, view_y);
	    world_coords = false;
	  }
	}

	public void paint(Graphics g)
	{
		useScreenCoords(g);
		g.setColor(Color.white);
		g.fillRect(0,0,400,300);
		// Reset coords to reflect view window
		useWorldCoords(g);
		// First layer the dots
		g.setColor(Color.green);
		for (int i = 0; i < dots.length; i++)
		  g.drawOval(dots[i].x, dots[i].y, 40, 30);
		//System.out.println("Begin scenery");
		for (int i = 0; i < scenery.length; i++)
		{
			//System.out.println("In paint loop, i="+i);
			scenery[i].draw(g, boxDebug);
		}
		fire.draw(g, boxDebug);
		tree.draw(g, boxDebug);

		// Now, reset coords to draw things that
		// don't scroll 
		useScreenCoords(g);
		
		g.setColor(Color.black);
		g.setFont(font);
		g.drawString("Status Line",100,25);
		if (wonGame())
		{
			g.drawString("You win!",100,100);
		}

		if (lostGame())
		{
			g.drawString("You lose.",100,100);
		}
	}

	private class mseL extends MouseAdapter
	{
		public void mouseClicked(MouseEvent e)
		{
			//This is kind of clumsy, but it works.
			// It would be better to keep track of whether or
			//not the applet has focus (with FocusListener)
			//and then either requestFocus or headTo as
			//appropriate.
			//
			requestFocus();
			// Adjust x and y coords to allow for view window
			tree.headTo(view_x + e.getX(),view_y + e.getY());
		}
	}

}