src/ui/list_selector.c

   1 #include <stdlib.h>
   2
   3 #include <SDL2/SDL.h>
   4
   5 #include "system/stacktrace.h"
   6 #include "system/lt.h"
   7 #include "system/nth_alloc.h"
   8 #include "system/str.h"
   9 #include "math/point.h"
  10 #include "game/sprite_font.h"
  11
  12 #include "./list_selector.h"
  13
  14 struct ListSelector
  15 {
  16     Lt *lt;
  17     const Sprite_font *sprite_font;
  18     const char **items;
  19     size_t count;
  20     Vec position;
  21     float width;
  22 };
  23
  24 ListSelector *create_list_selector(const Sprite_font *sprite_font,
  25                                    const char *items[],
  26                                    size_t count,
  27                                    Vec position,
  28                                    float width)
  29 {
  30     trace_assert(items);
  31
  32     Lt *lt = create_lt();
  33     if (lt == NULL) {
  34         return NULL;
  35     }
  36
  37     ListSelector *list_selector = PUSH_LT(lt, nth_alloc(sizeof(ListSelector)), free);
  38     if (list_selector == NULL) {
  39         RETURN_LT(lt, NULL);
  40     }
  41     list_selector->lt = lt;
  42
  43     list_selector->sprite_font = sprite_font;
  44
  45     list_selector->items = PUSH_LT(lt, nth_calloc(count, sizeof(const char*)), free);
  46     if (list_selector->items == NULL) {
  47         RETURN_LT(lt, NULL);
  48     }
  49
  50     for (size_t i = 0; i < count; ++i) {
  51         list_selector->items[i] = PUSH_LT(lt, string_duplicate(items[i], NULL), free);
  52         if (list_selector->items[i] == NULL) {
  53             RETURN_LT(lt, NULL);
  54         }
  55     }
  56
  57     list_selector->count = count;
  58     list_selector->position = position;
  59     list_selector->width = width;
  60
  61     return list_selector;
  62 }
  63
  64 void destroy_list_selector(ListSelector *list_selector)
  65 {
  66     trace_assert(list_selector);
  67     RETURN_LT0(list_selector->lt);
  68 }
  69
  70 int list_selector_render(const ListSelector *list_selector, SDL_Renderer *renderer)
  71 {
  72     trace_assert(list_selector);
  73     trace_assert(renderer);
  74
  75     // TODO: ListSelector.width is ignored in rendering
  76
  77     for (size_t i = 0; i < list_selector->count; ++i) {
  78         if (sprite_font_render_text(
  79                 list_selector->sprite_font,
  80                 renderer,
  81                 vec_sum(
  82                     list_selector->position,
  83                     vec(0.0f, (float) (i * FONT_CHAR_HEIGHT))),
  84                 vec(1.0f, 1.0f),
  85                 rgba(1.0f, 1.0f, 1.0f, 1.0f),
  86                 list_selector->items[i]) < 0) {
  87             return -1;
  88         }
  89     }
  90
  91     return 0;
  92 }
  93
  94 int list_selector_update(ListSelector *list_selector, float delta_time)
  95 {
  96     trace_assert(list_selector);
  97     (void) delta_time;
  98
  99     return 0;
 100 }
 101
 102 int list_selector_event(ListSelector *list_selector, const SDL_Event *event)
 103 {
 104     trace_assert(list_selector);
 105     trace_assert(event);
 106     return 0;
 107 }
 108
 109 const char *list_selector_selected(const ListSelector *list_selector)
 110 {
 111     trace_assert(list_selector);
 112     return NULL;
 113 }