1 #include <assert.h>

2 #include "imtk.h"

3 #include "state.h"

4 #include "draw.h"

5

6 static void calc_button_size(const char *label, int *wret, int *hret);

7 static void draw_button(int id, const char *label, int x, int y);

8

9 int imtk_button(int id, const char *label, int x, int y)

10 {

11 int w, h, res = 0;

12 int over = 0;

13

14 assert(id >= 0);

15

16 calc_button_size(label, &w, &h);

17

18 if(imtk_hit_test(x, y, w, h)) {

19 imtk_set_hot(id);

20 over = 1;

21 }

22

23 if(imtk_button_state(IMTK_LEFT_BUTTON)) {

24 if(over) {

25 imtk_set_active(id);

26 }

27 } else { /* mouse button up */

28 if(imtk_is_active(id)) {

29 imtk_set_active(-1);

30 if(imtk_is_hot(id) && over) {

31 res = 1;

32 }

33 }

34 }

35

36 draw_button(id, label, x, y);

37 return res;

38 }

39

40 static void draw_button(int id, const char *label, int x, int y)

41 {

42 int width, height;

43

44 calc_button_size(label, &width, &height);

45

46 glBegin(GL_QUADS);

47 if(imtk_hit_test(x, y, width, height)) {

48 glColor4fv(imtk_get_color(IMTK_FOCUS_COLOR));

49 } else {

50 glColor4fv(imtk_get_color(IMTK_BASE_COLOR));

51 }

52 glVertex2f(x, y);

53 glVertex2f(x + width, y);

54 glVertex2f(x + width, y + height);

55 glVertex2f(x, y + height);

56 glEnd();

57

58 imtk_draw_frame(x, y, width, height, imtk_is_active(id) ? FRAME_INSET : FRAME_OUTSET);

59

60 glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));

61 imtk_draw_string(x + 20, y + 15, label);

62 }

63

64 static void calc_button_size(const char *label, int *wret, int *hret)

65 {

66 int strsz = imtk_string_size(label);

67 if(wret) *wret = strsz + 40;

68 if(hret) *hret = 20;

69 }