package greenfoot;

import greenfoot.core.TextLabel;
import threadchecker.OnThread;
import threadchecker.Tag;

import java.awt.Graphics;
import java.util.Collection;
import java.util.List;




| Class that makes it possible for classes outside the greenfoot package to get
| access to world methods that are package protected. We need some
| package-protected methods in the world, because we don't want them to show up
| in the public interface visible to users.
|
| @author Poul Henriksen <polle@mip.sdu.dk>
|
public class WorldVisitor
{   
@OnThread(Tag.Any)
   
   public static int getWidthInCells(World w)
   {        
      return w.width;     
      }
    
   @OnThread(Tag.Any)
   
   public static int getHeightInCells(World w)
   {        
      return w.height;     
      }
    
   
   public static int getWidthInPixels(World w)
   {
      return w.getWidthInPixels();     
      }

   
   public static int getHeightInPixels(World w)
   {
      return w.getHeightInPixels();     
      }

   @OnThread(Tag.Any)
   
   public static int getCellSize(World w)
   {        
      return w.cellSize;     
      }
    
   
   public static Collection getObjectsAtPixel(World w, int x, int y)
   {
      return w.getObjectsAtPixel(x, y);     
      }

   
   


| Used to indicate the start of an animation sequence. For use in the collision checker.
| @see greenfoot.collision.CollisionChecker#startSequence()
|
public static void startSequence(World w)
   {
      w.startSequence();     
      }

   
   public static void paintDebug(World world, Graphics g)
   {
      world.paintDebug(g);     
      }
    
   
   


| Convert a location in pixels into a cell location
|
@OnThread(Tag.Any)
   
   public static int toCellFloor(World world, int x)
   {
      return world.toCellFloor(x);     
      }
    
   
   


| Returns the center of the cell. It should be rounded down with Math.floor() if the integer version is needed.
| @param l Cell location.
| @return Absolute location of the cell center in pixels.
|
public static  double getCellCenter(World w, int c)
   {
      return w.getCellCenter(c);     
      }
    
   
   


| Get the list of all objects in the world. This returns a live list which
| should not be modified by the caller. If iterating over this list, it
| should be synchronized on the world lock.
|
public static TreeActorSet getObjectsListInPaintOrder(World world)
   {
      return world.getObjectsListInPaintOrder();      
      }
    
   
   


| Get the list of all objects in the world. This returns a live list which
| should not be modified by the caller. While iterating over this list, the
| world lock should be held.
|
public static TreeActorSet getObjectsListInActOrder(World world)
   {
      return world.getObjectsListInActOrder();      
      }

   
   


| Get the background image for the world, but without initialising it if it is not yet created.
|
| @return Background of the world or null if not create yet.
|
public static GreenfootImage getBackgroundImage(World world)
   {
      return world.getBackgroundNoInit();     
      }
    
   
   


| Get the list of text labels to be displayed on the world.
|
public static List getTextLabels(World world)
   {        
      return world.textLabels;     
      } 
   }