1 #ifndef SCREEN_H_

2 #define SCREEN_H_

3

4 class Screen;

5

6 void push_screen(Screen *screen);

7 Screen *pop_screen();

8 Screen *current_screen();

9 Screen *previous_screen();

10

11

12 class Screen {

13 public:

14 virtual ~Screen();

15

16 virtual const char *get_name() const;

17

18 virtual bool init();

19 virtual void cleanup();

20

21 /// start will be called just before a screen is going to be activated

22 virtual void start();

23 /// stop will be called when a screen is being deactivated

24 virtual void stop();

25

26 /** each Screen subclass should override this function to specify

27 * the required redisplay interval:

28 * - 0 means no implcit redisplays are to be performed.

29 * Use request_redisplay to queue up a redisplay.

30 * - Any values > 0 are treated as inter-frame intervals in milliseconds

31 * The default (if not overriden) is 0.

32 */

33 virtual long redisplay_interval() const;

34

35 /// update will be called every frame before display

36 virtual void update(unsigned long tmsec);

37

38 /// pre_draw will be called before display

39 virtual void pre_draw() const;

40 /// display will be called whenever a screen needs to redraw itself

41 virtual void display() const;

42 /// post_draw will be called after display

43 virtual void post_draw() const;

44

45 /// keyboard event

46 virtual void keyboard(int key, bool pressed);

47 /// mouse motion event

48 virtual void motion(int x, int y, bool pressed);

49 /// mouse button event

50 virtual void button(int bn, bool pressed, int x, int y);

51 /// reshape event

52 virtual void reshape(int x, int y);

53 };

54

55 #endif // SCREEN_H_