Mercurial > MadButterfly
annotate examples/drag/main.c @ 1472:7cb7abb5063b
Refactory drawing functions into classes for state and transition
| author | Thinker K.F. Li <thinker@codemud.net> |
|---|---|
| date | Sun, 24 Apr 2011 15:13:41 +0800 |
| parents | 7f49b501ac4d |
| children |
| rev | line source |
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| 199 | 1 /*! \file |
| 2 * | |
| 3 * svg2code_ex is an example that show programmers how to create a | |
| 4 * menu with MadButterfly. | |
| 5 * | |
| 6 */ | |
| 7 #include <stdio.h> | |
| 8 #include <mb.h> | |
| 9 #include "menu.h" | |
| 10 | |
| 11 typedef struct _engine engine_t; | |
| 12 struct _engine { | |
|
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13 mb_rt_t *rt; |
| 199 | 14 redraw_man_t *rdman; |
| 15 menu_t *menu; | |
| 16 int state; | |
| 17 co_aix orx,ory; | |
| 18 int start_x,start_y; | |
| 214 | 19 coord_t *cursor; |
| 199 | 20 }; |
| 21 engine_t *engine_init() | |
| 22 { | |
| 23 | |
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24 mb_rt_t *rt; |
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25 rt = mb_runtime_new(":0.0", 800, 600); |
| 199 | 26 engine_t *en = (engine_t *) malloc(sizeof(engine_t)); |
| 27 | |
| 28 en->rt = rt; | |
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29 en->rdman = mb_runtime_rdman(rt); |
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Star in drag would be moved out the window border when cursor hit it.
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30 en->state = 0; |
| 199 | 31 return en; |
| 32 } | |
| 33 void engine_close(engine_t *en) | |
| 34 { | |
| 35 /* | |
| 36 * Start handle connections, includes one to X server. | |
| 37 * User start to interact with the application. | |
| 38 */ | |
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parents:
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39 mb_runtime_event_loop(en->rt); |
| 199 | 40 |
| 41 /* | |
| 42 * Clean | |
| 43 */ | |
| 44 menu_free(en->menu); | |
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45 mb_runtime_free(en->rt); |
| 199 | 46 free(en); |
| 47 } | |
| 48 #define COORD_SHOW(group) coord_show(group);rdman_coord_changed(X_MB_rdman(ex_rt->rt), group) | |
| 49 #define COORD_HIDE(group) coord_hide(group);rdman_coord_changed(X_MB_rdman(ex_rt->rt), group) | |
| 50 | |
| 51 | |
| 52 static void cursor_press_handler(event_t *evt, void *arg) { | |
| 53 engine_t *en = (engine_t *) arg; | |
| 54 mouse_event_t *mev = (mouse_event_t *) evt; | |
| 55 | |
| 56 en->start_x = mev->x; | |
| 57 en->start_y = mev->y; | |
| 214 | 58 en->orx = en->cursor->matrix[2]; |
| 59 en->ory = en->cursor->matrix[5]; | |
| 199 | 60 printf("pressed %g %g\n",en->orx,en->ory); |
| 61 en->state = 1; | |
| 62 } | |
| 63 | |
| 64 static void cursor_release_handler(event_t *evt, void *arg) { | |
| 65 engine_t *en = (engine_t *) arg; | |
| 66 printf("up\n"); | |
| 67 en->state = 0; | |
| 68 } | |
| 69 | |
| 70 static void cursor_move_handler(event_t *evt, void *arg) { | |
| 71 engine_t *en = (engine_t *) arg; | |
| 72 mouse_event_t *mev = (mouse_event_t *) evt; | |
| 73 | |
| 74 if (en->state) { | |
| 75 printf("move to (%d %d)\n", mev->x,mev->y); | |
| 214 | 76 coord_move(en->cursor,en->orx + (mev->x-en->start_x),en->ory + (mev->y-en->start_y)); |
| 77 rdman_coord_changed(en->rdman, en->cursor); | |
| 199 | 78 /* Update changed part to UI. */ |
| 79 rdman_redraw_changed(en->rdman); | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 int main(int argc, char * const argv[]) { | |
| 84 subject_t *subject; | |
| 85 engine_t *en; | |
| 86 | |
| 87 en = engine_init(); | |
| 88 en->menu = menu_new(en->rdman, en->rdman->root_coord); | |
| 214 | 89 en->cursor = (coord_t *) MB_SPRITE_GET_OBJ(&en->menu->lsym.sprite, "star"); |
| 90 printf("en->cursor=%x star=%x\n",en->cursor,en->menu->star); | |
| 91 printf("sprite=%x\n",&en->menu->lsym.sprite); | |
| 92 printf("en->menu=%x\n",en->menu); | |
| 199 | 93 |
| 94 /* | |
| 95 * Register observers to subjects of events for objects. | |
| 96 */ | |
| 214 | 97 subject = coord_get_mouse_event(en->cursor); |
| 199 | 98 subject_add_event_observer(subject, EVT_MOUSE_BUT_PRESS, cursor_press_handler, en); |
| 99 subject_add_event_observer(subject, EVT_MOUSE_BUT_RELEASE, cursor_release_handler, en); | |
| 100 subject_add_event_observer(subject, EVT_MOUSE_MOVE, cursor_move_handler, en); | |
| 101 | |
| 102 | |
| 103 engine_close(en); | |
| 104 | |
| 105 return 0; | |
| 106 } | |
| 107 | |
| 108 /* vim: set ts=4 */ |