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