Mercurial > MadButterfly
annotate examples/drag/main.c @ 776:77b561bb7929
Implement new algorithm to calculate the origin of the SVG elemnts so that we can implement object resize without changing the position of the object.
However, the image does not work here since it does not use the transformation of the group.
| author | wycc |
|---|---|
| date | Mon, 30 Aug 2010 08:56:44 +0800 |
| parents | 29e1b2bffe4c |
| children | 7f49b501ac4d |
| rev | line source |
|---|---|
| 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 { | |
| 13 X_MB_runtime_t *rt; | |
| 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 | |
| 24 X_MB_runtime_t *rt; | |
| 25 rt = X_MB_new(":0.0", 800, 600); | |
| 26 engine_t *en = (engine_t *) malloc(sizeof(engine_t)); | |
| 27 | |
| 28 en->rt = rt; | |
| 29 en->rdman = X_MB_rdman(rt); | |
|
219
1eb9ee5ae4f2
Star in drag would be moved out the window border when cursor hit it.
Thinker K.F. Li <thinker@branda.to>
parents:
214
diff
changeset
|
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 */ | |
| 39 X_MB_handle_connection(en->rt); | |
| 40 | |
| 41 /* | |
| 42 * Clean | |
| 43 */ | |
| 44 menu_free(en->menu); | |
| 45 X_MB_free(en->rt); | |
| 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 */ |