nuclear@0: #ifndef SCREEN_H_
nuclear@0: #define SCREEN_H_
nuclear@0: 
nuclear@0: class Screen;
nuclear@0: 
nuclear@0: void push_screen(Screen *screen);
nuclear@0: Screen *pop_screen();
nuclear@0: Screen *current_screen();
nuclear@0: Screen *previous_screen();
nuclear@0: 
nuclear@0: 
nuclear@0: class Screen {
nuclear@0: public:
nuclear@0: 	virtual ~Screen();
nuclear@0: 
nuclear@0: 	virtual const char *get_name() const;
nuclear@0: 
nuclear@0: 	virtual bool init();
nuclear@0: 	virtual void cleanup();
nuclear@0: 
nuclear@0: 	/// start will be called just before a screen is going to be activated
nuclear@0: 	virtual void start();
nuclear@0: 	/// stop will be called when a screen is being deactivated
nuclear@0: 	virtual void stop();
nuclear@0: 
nuclear@0: 	/** each Screen subclass should override this function to specify
nuclear@0: 	 * the required redisplay interval:
nuclear@0: 	 * - 0 means no implcit redisplays are to be performed.
nuclear@0: 	 *   Use request_redisplay to queue up a redisplay.
nuclear@0: 	 * - Any values > 0 are treated as inter-frame intervals in milliseconds
nuclear@0: 	 * The default (if not overriden) is 0.
nuclear@0: 	 */
nuclear@0: 	virtual long redisplay_interval() const;
nuclear@0: 
nuclear@0: 	/// update will be called every frame before display
nuclear@0: 	virtual void update(unsigned long tmsec);
nuclear@0: 
nuclear@0: 	/// pre_draw will be called before display
nuclear@0: 	virtual void pre_draw() const;
nuclear@0: 	/// display will be called whenever a screen needs to redraw itself
nuclear@0: 	virtual void display() const;
nuclear@0: 	/// post_draw will be called after display
nuclear@0: 	virtual void post_draw() const;
nuclear@0: 
nuclear@0: 	/// keyboard event
nuclear@0: 	virtual void keyboard(int key, bool pressed);
nuclear@0: 	/// mouse motion event
nuclear@0: 	virtual void motion(int x, int y, bool pressed);
nuclear@0: 	/// mouse button event
nuclear@0: 	virtual void button(int bn, bool pressed, int x, int y);
nuclear@0: 	/// reshape event
nuclear@0: 	virtual void reshape(int x, int y);
nuclear@0: };
nuclear@0: 
nuclear@0: #endif	// SCREEN_H_