1 /*

2 GoatKit - a themable/animated widget toolkit for games

3 Copyright (C) 2014 John Tsiombikas <nuclear@member.fsf.org>

4

5 This program is free software: you can redistribute it and/or modify

6 it under the terms of the GNU Lesser General Public License as published by

7 the Free Software Foundation, either version 3 of the License, or

8 (at your option) any later version.

9

10 This program is distributed in the hope that it will be useful,

11 but WITHOUT ANY WARRANTY; without even the implied warranty of

12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

13 GNU Lesser General Public License for more details.

14

15 You should have received a copy of the GNU Lesser General Public License

16 along with this program. If not, see <http://www.gnu.org/licenses/>.

17 */

18 #ifndef BOOLANIM_H_

19 #define BOOLANIM_H_

20

21 class BoolAnim {

22 private:

23 mutable float value;

24 mutable float trans_dir; // transition direction (sign)

25 long trans_start; // transition start time

26 long trans_dur;

27

28 long (*get_msec)();

29

30 void update(long tm) const;

31

32 public:

33 BoolAnim(bool st = false);

34

35 void set_transition_duration(long dur);

36 long get_transition_duration() const;

37

38 void set_time_callback(long (*time_func)());

39

40 void set(bool st);

41

42 void change(bool st);

43 void change(bool st, long trans_start);

44

45 bool get_state() const;

46 bool get_state(long tm) const;

47

48 float get_value() const;

49 float get_value(long tm) const;

50

51 // transition direction (-1, 0, 1)

52 float get_dir() const;

53 float get_dir(long tm) const;

54

55 operator bool() const; // equivalent to get_state

56 operator float() const; // equivalent to get_value

57 };

58

59 #endif // BOOLANIM_H_