added sources for Slick

Former-commit-id: 1647fa32ef6894bd7db44f741f07c2f4dcdf9054
Former-commit-id: 0e5810dcfbe1fd59b13e7cabe9f1e93c5542da2d

lib/slick-source/org/newdawn/slick/state/GameState.java

@@ -0,0 +1,71 @@
+package org.newdawn.slick.state;
+
+import org.newdawn.slick.GameContainer;
+import org.newdawn.slick.Graphics;
+import org.newdawn.slick.InputListener;
+import org.newdawn.slick.SlickException;
+
+/**
+ * A single state building up part of the game. The state include rendering, logic and input handling
+ * for the state.
+ *
+ * @author kevin
+ */
+public interface GameState extends InputListener {
+	/**
+	 * Get the ID of this state
+	 * 
+	 * @return The game unique ID of this state
+	 */
+	public int getID();
+	
+	/**
+	 * Initialise the state. It should load any resources it needs at this stage
+	 * 
+	 * @param container The container holding the game
+	 * @param game The game holding this state
+	 * @throws SlickException Indicates a failure to initialise a resource for this state
+	 */
+	public void init(GameContainer container, StateBasedGame game) throws SlickException;
+	
+	/**
+	 * Render this state to the game's graphics context
+	 * 
+	 * @param container The container holding the game
+	 * @param game The game holding this state
+	 * @param g The graphics context to render to
+	 * @throws SlickException Indicates a failure to render an artifact
+	 */
+	public void render(GameContainer container, StateBasedGame game, Graphics g) throws SlickException;
+	
+	/**
+	 * Update the state's logic based on the amount of time thats passed
+	 * 
+	 * @param container The container holding the game
+	 * @param game The game holding this state
+	 * @param delta The amount of time thats passed in millisecond since last update
+	 * @throws SlickException Indicates an internal error that will be reported through the
+	 * standard framework mechanism
+	 */
+	public void update(GameContainer container, StateBasedGame game, int delta) throws SlickException ;
+	
+	/**
+	 * Notification that we've entered this game state
+	 * 
+	 * @param container The container holding the game
+	 * @param game The game holding this state
+	 * @throws SlickException Indicates an internal error that will be reported through the
+	 * standard framework mechanism
+	 */
+	public void enter(GameContainer container, StateBasedGame game) throws SlickException;
+
+	/**
+	 * Notification that we're leaving this game state
+	 * 
+	 * @param container The container holding the game
+	 * @param game The game holding this state
+	 * @throws SlickException Indicates an internal error that will be reported through the
+	 * standard framework mechanism
+	 */
+	public void leave(GameContainer container, StateBasedGame game) throws SlickException;
+}