/**
 * Simple Elementary's <b>gengrid widget</b> example, illustrating its
 * usage and API.
 *
 * See stdout/stderr for output. Compile with:
 *
 * @verbatim
 * gcc -g gengrid_example.c -o gengrid_example `pkg-config --cflags --libs elementary`
 * @endverbatim
 */

#include <Elementary.h>

typedef struct _Example_Item
{
   const char *path;
} Example_Item;

static const char *imgs[9] =
{
   "panel_01.jpg",
   "plant_01.jpg",
   "rock_01.jpg",
   "rock_02.jpg",
   "sky_01.jpg",
   "sky_02.jpg",
   "sky_03.jpg",
   "sky_04.jpg",
   "wood_01.jpg",
};

static Elm_Gengrid_Item_Class *gic = NULL;
static Evas_Object *before_bt, *after_bt;

/* change layouting mode */
static void
_horizontal_grid(void        *data,
                 Evas_Object *obj,
                 void        *event_info)
{
   Evas_Object *grid = data;

   elm_gengrid_horizontal_set(grid, elm_check_state_get(obj));
}

/* "always select" callback */
static void
_always_select_change(void        *data,
                      Evas_Object *obj,
                      void        *event_info)
{
   Evas_Object *grid = data;
   Eina_Bool always = elm_check_state_get(obj);

   if (always)
     elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_ALWAYS);
   else
     elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_DEFAULT);

   fprintf(stdout, "\"Always select\" mode for gengrid items is now %s\n",
           always ? "on" : "off");
}

/* "bouncing mode" callback */
static void
_bouncing_change(void        *data,
                 Evas_Object *obj,
                 void        *event_info)
{
   Evas_Object *grid = data;
   Eina_Bool bounce = elm_check_state_get(obj);

   elm_scroller_bounce_set(grid, bounce, bounce);

   fprintf(stdout, "Bouncing effect for gengrid is now %s\n",
           bounce ? "on" : "off");
}

/* multi-selection callback */
static void
_multi_change(void        *data,
              Evas_Object *obj,
              void        *event_info)
{
   Evas_Object *grid = data;
   Eina_Bool multi = elm_check_state_get(obj);

   elm_gengrid_multi_select_set(grid, multi);

   fprintf(stdout, "Multi-selection for gengrid is now %s\n",
           multi ? "on" : "off");

   elm_object_disabled_set(before_bt, multi);
   elm_object_disabled_set(after_bt, multi);

   if (!multi)
     {
        Elm_Object_Item *gg_it;
        const Eina_List *selected = elm_gengrid_selected_items_get(grid), *l;
        EINA_LIST_FOREACH(selected, l, gg_it)
           elm_gengrid_item_selected_set(gg_it, EINA_FALSE);
     }
}

/* no selection callback */
static void
_no_sel_change(void        *data,
               Evas_Object *obj,
               void        *event_info)
{
   Evas_Object *grid = data;
   Eina_Bool no_sel = elm_check_state_get(obj);

   if (no_sel)
     elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_NONE);
   else
     elm_gengrid_select_mode_set(grid, ELM_OBJECT_SELECT_MODE_DEFAULT);

   fprintf(stdout, "Selection for gengrid items is now %s\n",
           no_sel ? "disabled" : "enabled");
}

/* item selection callback */
static void
_grid_sel(void        *data,
          Evas_Object *obj,
          void        *event_info)
{
   unsigned int x, y;
   Example_Item *it = elm_object_item_data_get(event_info);

   elm_gengrid_item_pos_get(event_info, &x, &y);

   fprintf(stdout, "Item [%p], with data [%p], path %s, at position (%d, %d),"
           " has been selected\n", event_info, data, it->path, x, y);
}

/* new item with random path */
static Example_Item *
_item_new(void)
{
   Example_Item *it;

   it = malloc(sizeof(*it));
   it->path = eina_stringshare_add(imgs[rand() % (sizeof(imgs) /
                                                  sizeof(imgs[0]))]);
   return it;
}

/* "insert before" callback */
static void
_before_bt_clicked(void        *data,
                   Evas_Object *obj,
                   void        *event_info)
{
   Example_Item *it;
   Evas_Object *grid = data;
   Elm_Object_Item *sel;

   sel = elm_gengrid_selected_item_get(grid);
   if (!sel)
     return;

   it = _item_new();
   elm_gengrid_item_insert_before(grid, gic, it, sel, _grid_sel, NULL);
}

/* "insert after" callback */
static void
_after_bt_clicked(void        *data,
                  Evas_Object *obj,
                  void        *event_info)
{
   Example_Item *it;
   Evas_Object *grid = data;
   Elm_Object_Item *sel;

   sel = elm_gengrid_selected_item_get(grid);
   if (!sel)
     return;

   it = _item_new();
   elm_gengrid_item_insert_after(grid, gic, it, sel, _grid_sel, NULL);
}

/* prepend an item */
static void
_prepend_bt_clicked(void        *data,
                    Evas_Object *obj,
                    void        *event_info)
{
   Example_Item *it;
   Evas_Object *grid = data;

   it = _item_new();
   elm_gengrid_item_prepend(grid, gic, it, _grid_sel, NULL);
}

/* append an item */
static void
_append_bt_clicked(void        *data,
                   Evas_Object *obj,
                   void        *event_info)
{
   Evas_Object *grid = data;
   Example_Item *it = _item_new();

   elm_gengrid_item_append(grid, gic, it, _grid_sel, NULL);
}

/* delete items */
static void
_clear_cb(void        *data,
          Evas_Object *obj,
          void        *event_info)
{
   elm_gengrid_clear(data);

   fprintf(stdout, "Clearing the grid!\n");
}

/* bring in 1st item */
static void
_bring_1st_clicked(void        *data,
                   Evas_Object *obj,
                   void        *event_info)
{
   Elm_Object_Item *gg_it = elm_gengrid_first_item_get(data);

   if (!gg_it) return;

   elm_gengrid_item_bring_in(gg_it, ELM_GENGRID_ITEM_SCROLLTO_IN);
}

/* show last item */
static void
_show_last_clicked(void        *data,
                   Evas_Object *obj,
                   void        *event_info)
{
   Elm_Object_Item *gg_it = elm_gengrid_last_item_get(data);

   if (!gg_it) return;

   elm_gengrid_item_show(gg_it, ELM_GENGRID_ITEM_SCROLLTO_IN);
}

/* disable selected item */
static void
_toggle_disabled_cb(void        *data,
                    Evas_Object *obj,
                    void        *event_info)
{
   Elm_Object_Item *gg_it = elm_gengrid_selected_item_get(data);

   if (!gg_it) return;

   elm_gengrid_item_selected_set(gg_it, EINA_FALSE);
   elm_object_item_disabled_set(gg_it, EINA_TRUE);
}

/* change items' size */
static void
_size_changed(void        *data,
              Evas_Object *obj,
              void        *event_info)
{
   Evas_Object *grid = data;
   int size = elm_spinner_value_get(obj);

   elm_gengrid_item_size_set(grid, size, size);
}

/* item double click callback */
static void
_double_click(void        *data,
              Evas_Object *obj,
              void        *event_info)
{
   fprintf(stdout, "Double click on item with handle %p\n", event_info);
}

/* item long press callback */
static void
_long_pressed(void        *data,
              Evas_Object *obj,
              void        *event_info)
{
   fprintf(stdout, "Long press on item with handle %p\n", event_info);
}

/* label fetching callback */
static char *
_grid_label_get(void        *data,
                Evas_Object *obj,
                const char  *part)
{
   const Example_Item *it = data;
   char buf[256];

   snprintf(buf, sizeof(buf), "Photo %s", it->path);
   return strdup(buf);
}

/* icon fetching callback */
static Evas_Object *
_grid_content_get(void        *data,
                  Evas_Object *obj,
                  const char  *part)
{
   const Example_Item *it = data;

   if (!strcmp(part, "elm.swallow.icon"))
     {
        Evas_Object *icon = elm_bg_add(obj);
        char buf[PATH_MAX];

        snprintf(buf, sizeof(buf), "%s/images/%s", elm_app_data_dir_get(),
                 it->path);

        elm_bg_file_set(icon, buf, NULL);
        evas_object_size_hint_aspect_set(icon, EVAS_ASPECT_CONTROL_VERTICAL, 1,
                                         1);
        evas_object_show(icon);
        return icon;
     }
   else if (!strcmp(part, "elm.swallow.end"))
     {
        Evas_Object *ck;
        ck = elm_check_add(obj);
        evas_object_propagate_events_set(ck, EINA_FALSE);
        evas_object_show(ck);
        return ck;
     }

   return NULL;
}

/* state fetching callback */
static Eina_Bool
_grid_state_get(void        *data,
                Evas_Object *obj,
                const char  *part)
{
   return EINA_FALSE;
}

/* deletion callback */
static void
_grid_del(void        *data,
          Evas_Object *obj)
{
   Example_Item *it = data;

   eina_stringshare_del(it->path);
   free(it);
}

/* scrolling animation stopped callback */
static void
_grid_scroll_stopped_cb(void        *data,
                        Evas_Object *obj,
                        void        *event_info)
{
   int h_pagenumber = 0, v_pagenumber = 0;
   elm_scroller_current_page_get(obj, &h_pagenumber, &v_pagenumber);
   fprintf(stdout, "Grid current horiz page is %d, vert page is %d\n",
           h_pagenumber, v_pagenumber);
}

/* items grid horizontal alignment change */
static void
_h_align_change_cb(void        *data,
                   Evas_Object *obj,
                   void        *event_info)
{
   double v_align;
   double val = elm_slider_value_get(obj);

   elm_gengrid_align_get(data, NULL, &v_align);

   fprintf(stdout, "Setting horizontal alignment to %f\n", val);
   elm_gengrid_align_set(data, val, v_align);
}

static void
_v_align_change_cb(void        *data,
                   Evas_Object *obj,
                   void        *event_info)
{
   double h_align;
   double val = elm_slider_value_get(obj);

   elm_gengrid_align_get(data, &h_align, NULL);

   fprintf(stdout, "Setting vertical alignment to %f\n", val);
   elm_gengrid_align_set(data, h_align, val);
}

/* page relative size change */
static void
_page_change_cb(void        *data,
                Evas_Object *obj,
                void        *event_info)
{
   double val = elm_slider_value_get(obj);

   elm_scroller_page_relative_set(data, val, val);

   fprintf(stdout, "Setting grid page's relative size to %f\n", val);
}

EAPI_MAIN int
elm_main(int    argc,
         char **argv)
{
   Evas_Object *win, *grid, *bx, *hbx_1, *hbx_2, *hbx_3, *bt, *ck, *sl, *sp;
   Eina_Bool bounce;
   double h, v;

   srand(time(NULL));

   elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);
   elm_app_info_set(elm_main, "elementary", "images");

   win = elm_win_util_standard_add("gengrid", "Generic Grid Example");
   elm_win_autodel_set(win, EINA_TRUE);

   bx = elm_box_add(win);
   evas_object_size_hint_weight_set(bx, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
   elm_win_resize_object_add(win, bx);
   evas_object_show(bx);

   grid = elm_gengrid_add(win);
   elm_gengrid_item_size_set(grid, 150, 150);
   evas_object_size_hint_weight_set(grid, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
   evas_object_size_hint_align_set(grid, EVAS_HINT_FILL, EVAS_HINT_FILL);
   elm_box_pack_end(bx, grid);
   evas_object_smart_callback_add(grid, "clicked,double", _double_click, NULL);
   evas_object_smart_callback_add(grid, "longpressed", _long_pressed, NULL);
   evas_object_show(grid);

   hbx_1 = elm_box_add(win);
   evas_object_size_hint_weight_set(hbx_1, EVAS_HINT_EXPAND, 0.0);
   elm_box_horizontal_set(hbx_1, EINA_TRUE);
   elm_box_pack_end(bx, hbx_1);
   evas_object_show(hbx_1);

   bt = elm_button_add(win);
   elm_object_text_set(bt, "Append");
   evas_object_smart_callback_add(bt, "clicked", _append_bt_clicked, grid);
   elm_box_pack_end(hbx_1, bt);
   evas_object_show(bt);

   bt = elm_button_add(win);
   elm_object_text_set(bt, "Prepend");
   evas_object_smart_callback_add(bt, "clicked", _prepend_bt_clicked, grid);
   elm_box_pack_end(hbx_1, bt);
   evas_object_show(bt);

   before_bt = elm_button_add(win);
   elm_object_text_set(before_bt, "Insert before");
   evas_object_smart_callback_add(before_bt, "clicked", _before_bt_clicked,
                                  grid);
   elm_box_pack_end(hbx_1, before_bt);
   evas_object_show(before_bt);

   after_bt = elm_button_add(win);
   elm_object_text_set(after_bt, "Insert after");
   evas_object_smart_callback_add(after_bt, "clicked", _after_bt_clicked, grid);
   elm_box_pack_end(hbx_1, after_bt);
   evas_object_show(after_bt);

   bt = elm_button_add(win);
   elm_object_text_set(bt, "Clear");
   evas_object_smart_callback_add(bt, "clicked", _clear_cb, grid);
   elm_box_pack_end(hbx_1, bt);
   evas_object_show(bt);

   bt = elm_button_add(win);
   elm_object_text_set(bt, "Bring in 1st");
   evas_object_smart_callback_add(bt, "clicked", _bring_1st_clicked, grid);
   elm_box_pack_end(hbx_1, bt);
   evas_object_show(bt);

   bt = elm_button_add(win);
   elm_object_text_set(bt, "Show last");
   evas_object_smart_callback_add(bt, "clicked", _show_last_clicked, grid);
   elm_box_pack_end(hbx_1, bt);
   evas_object_show(bt);

   sp = elm_spinner_add(win);
   elm_spinner_min_max_set(sp, 10, 1024);
   elm_spinner_value_set(sp, 150);
   elm_spinner_label_format_set(sp, "Item size: %.0f");
   evas_object_smart_callback_add(sp, "changed", _size_changed, grid);
   evas_object_size_hint_weight_set(sp, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
   elm_box_pack_end(hbx_1, sp);
   evas_object_show(sp);

   hbx_2 = elm_box_add(win);
   evas_object_size_hint_weight_set(hbx_2, EVAS_HINT_EXPAND, 0.0);
   elm_box_horizontal_set(hbx_2, EINA_TRUE);
   elm_box_pack_end(bx, hbx_2);
   evas_object_show(hbx_2);

   bt = elm_button_add(win);
   elm_object_text_set(bt, "Disable item");
   evas_object_smart_callback_add(bt, "clicked", _toggle_disabled_cb, grid);
   elm_box_pack_end(hbx_2, bt);
   evas_object_show(bt);

   ck = elm_check_add(win);
   elm_object_text_set(ck, "Horizontal mode");
   evas_object_smart_callback_add(ck, "changed", _horizontal_grid, grid);
   elm_box_pack_end(hbx_2, ck);
   evas_object_show(ck);

   ck = elm_check_add(win);
   elm_object_text_set(ck, "Always select");
   evas_object_smart_callback_add(ck, "changed", _always_select_change, grid);
   elm_box_pack_end(hbx_2, ck);
   evas_object_show(ck);

   ck = elm_check_add(win);
   elm_scroller_bounce_get(grid, &bounce, NULL);
   elm_object_text_set(ck, "Bouncing");
   elm_check_state_set(ck, bounce);
   evas_object_smart_callback_add(ck, "changed", _bouncing_change, grid);
   elm_box_pack_end(hbx_2, ck);
   evas_object_show(ck);

   ck = elm_check_add(win);
   elm_object_text_set(ck, "Multi-selection");
   elm_check_state_set(ck, elm_gengrid_multi_select_get(grid));
   evas_object_smart_callback_add(ck, "changed", _multi_change, grid);
   elm_box_pack_end(hbx_2, ck);
   evas_object_show(ck);

   ck = elm_check_add(win);
   elm_object_text_set(ck, "No selection");
   evas_object_smart_callback_add(ck, "changed", _no_sel_change, grid);
   elm_box_pack_end(hbx_2, ck);
   evas_object_show(ck);

   hbx_3 = elm_box_add(win);
   evas_object_size_hint_weight_set(hbx_3, EVAS_HINT_EXPAND, 0.0);
   elm_box_horizontal_set(hbx_3, EINA_TRUE);
   elm_box_pack_end(bx, hbx_3);
   evas_object_show(hbx_3);

   elm_gengrid_align_get(grid, &h, &v);
   evas_object_smart_callback_add(grid, "scroll,anim,stop", _grid_scroll_stopped_cb, NULL);

   sl = elm_slider_add(win);
   elm_object_text_set(sl, "Horiz. alignment");
   elm_slider_span_size_set(sl, 100);
   evas_object_size_hint_align_set(sl, 0.5, EVAS_HINT_FILL);
   evas_object_size_hint_weight_set(sl, 0.0, EVAS_HINT_EXPAND);
   elm_slider_indicator_format_set(sl, "%1.1f");
   elm_slider_value_set(sl, h);
   elm_box_pack_end(hbx_3, sl);
   evas_object_show(sl);

   evas_object_smart_callback_add(sl, "changed", _h_align_change_cb, grid);

   sl = elm_slider_add(win);
   elm_object_text_set(sl, "Vert. alignment");
   elm_slider_span_size_set(sl, 100);
   evas_object_size_hint_align_set(sl, 0.5, EVAS_HINT_FILL);
   evas_object_size_hint_weight_set(sl, 0.0, EVAS_HINT_EXPAND);
   elm_slider_indicator_format_set(sl, "%1.1f");
   elm_slider_value_set(sl, v);
   elm_box_pack_end(hbx_3, sl);
   evas_object_show(sl);

   evas_object_smart_callback_add(sl, "changed", _v_align_change_cb, grid);

   elm_gengrid_align_get(grid, &h, &v);

   sl = elm_slider_add(win);
   elm_object_text_set(sl, "Page rel. size");
   elm_slider_span_size_set(sl, 100);
   evas_object_size_hint_align_set(sl, 0.5, EVAS_HINT_FILL);
   evas_object_size_hint_weight_set(sl, 0.0, EVAS_HINT_EXPAND);
   elm_slider_indicator_format_set(sl, "%1.1f");
   elm_slider_value_set(sl, h);
   elm_box_pack_end(hbx_3, sl);
   evas_object_show(sl);

   _page_change_cb(grid, sl, NULL);
   evas_object_smart_callback_add(sl, "changed", _page_change_cb, grid);

   if (!gic)
     {
        gic = elm_gengrid_item_class_new();
        gic->item_style = "default";
        gic->func.text_get = _grid_label_get;
        gic->func.content_get = _grid_content_get;
        gic->func.state_get = _grid_state_get;
        gic->func.del = _grid_del;
     } // we only create the first time its needed. we dont unref/free

   _append_bt_clicked(grid, NULL, NULL);
   _append_bt_clicked(grid, NULL, NULL);
   _append_bt_clicked(grid, NULL, NULL);

   evas_object_resize(win, 600, 600);
   evas_object_show(win);

   elm_run();

   return 0;
}
ELM_MAIN()
