efl

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/*
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 * gcc -o button_example_01 button_example_01.c `pkg-config --cflags --libs elementary`
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 */
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#include <Elementary.h>
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typedef struct
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{
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   Evas_Object *mid;
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   Evas_Object *icon_still;
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   struct
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     {
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        Evas_Object *up;
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        Evas_Object *down;
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        Evas_Object *left;
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        Evas_Object *right;
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     } cursors;
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} App_Data;
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static void
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_btn_cursors_release_cb(void *data, Evas_Object *btn EINA_UNUSED,
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                        void *ev EINA_UNUSED)
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{
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   App_Data *app = data;
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   elm_object_part_content_set(app->mid, "icon", app->icon_still);
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   app->icon_still = NULL;
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}
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static void
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_btn_cursors_move_cb(void *data, Evas_Object *btn, void *ev EINA_UNUSED)
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{
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   App_Data *app = data;
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   double ax, ay;
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   if (!app->icon_still)
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     {
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        Evas_Object *icon;
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        app->icon_still = elm_object_content_unset(app->mid);
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        evas_object_hide(app->icon_still);
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        icon = elm_icon_add(app->mid);
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        elm_icon_standard_set(icon, "chat");
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        elm_object_part_content_set(app->mid, "icon", icon);
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     }
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   evas_object_size_hint_align_get(app->mid, &ax, &ay);
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   if (btn == app->cursors.up)
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     {
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        ay -= 0.05;
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        if (ay < 0.0)
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          ay = 0.0;
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     }
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   else if (btn == app->cursors.down)
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     {
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        ay += 0.05;
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        if (ay > 1.0)
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          ay = 1.0;
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     }
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   else if (btn == app->cursors.left)
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     {
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        ax -= 0.05;
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        if (ax < 0.0)
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          ax = 0.0;
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     }
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   else if (btn == app->cursors.right)
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     {
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        ax += 0.05;
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        if (ax > 1.0)
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          ax = 1.0;
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     }
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   evas_object_size_hint_align_set(app->mid, ax, ay);
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}
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static void
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_btn_options_cb(void *data, Evas_Object *btn, void *ev EINA_UNUSED)
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{
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   char *ptr;
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   double t;
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   App_Data *app = data;
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   const char *lbl = elm_object_text_get(btn);
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   ptr = strchr(lbl, ':');
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   ptr += 2;
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   t = strtod(ptr, NULL);
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   if (!strncmp(lbl, "Initial", 7))
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     {
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        elm_button_autorepeat_initial_timeout_set(app->cursors.up, t);
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        elm_button_autorepeat_initial_timeout_set(app->cursors.down, t);
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        elm_button_autorepeat_initial_timeout_set(app->cursors.left, t);
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        elm_button_autorepeat_initial_timeout_set(app->cursors.right, t);
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     }
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   else if (!strncmp(lbl, "Gap", 3))
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     {
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        elm_button_autorepeat_gap_timeout_set(app->cursors.up, t);
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        elm_button_autorepeat_gap_timeout_set(app->cursors.down, t);
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        elm_button_autorepeat_gap_timeout_set(app->cursors.left, t);
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        elm_button_autorepeat_gap_timeout_set(app->cursors.right, t);
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     }
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}
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EAPI_MAIN int
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elm_main(int argc EINA_UNUSED, char **argv EINA_UNUSED)
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{
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   Evas_Object *win, *box, *box2, *btn, *icon;
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   static App_Data data;
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   elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);
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   win = elm_win_util_standard_add("Button example", "Button example");
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   elm_win_autodel_set(win, EINA_TRUE);
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   box = elm_box_add(win);
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   evas_object_size_hint_weight_set(box, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
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   elm_win_resize_object_add(win, box);
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   evas_object_show(box);
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   box2 = elm_box_add(win);
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   elm_box_horizontal_set(box2, EINA_TRUE);
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   evas_object_size_hint_weight_set(box2, EVAS_HINT_EXPAND, 0.0);
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   elm_box_pack_end(box, box2);
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   evas_object_show(box2);
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   btn = elm_button_add(win);
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   elm_object_text_set(btn, "Initial: 0.0");
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "clicked", _btn_options_cb, &data);
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   btn = elm_button_add(win);
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   elm_object_text_set(btn, "Initial: 1.0");
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "clicked", _btn_options_cb, &data);
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   btn = elm_button_add(win);
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   elm_object_text_set(btn, "Initial: 5.0");
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "clicked", _btn_options_cb, &data);
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   box2 = elm_box_add(win);
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   elm_box_horizontal_set(box2, EINA_TRUE);
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   evas_object_size_hint_weight_set(box2, EVAS_HINT_EXPAND, 0.0);
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   elm_box_pack_end(box, box2);
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   evas_object_show(box2);
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   btn = elm_button_add(win);
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   elm_object_text_set(btn, "Gap: 0.1");
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "clicked", _btn_options_cb, &data);
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   btn = elm_button_add(win);
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   elm_object_text_set(btn, "Gap: 0.5");
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "clicked", _btn_options_cb, &data);
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   btn = elm_button_add(win);
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   elm_object_text_set(btn, "Gap: 1.0");
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "clicked", _btn_options_cb, &data);
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   btn = elm_button_add(win);
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   elm_button_autorepeat_set(btn, EINA_TRUE);
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   elm_button_autorepeat_initial_timeout_set(btn, 1.0);
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   elm_button_autorepeat_gap_timeout_set(btn, 0.5);
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   evas_object_size_hint_weight_set(btn, EVAS_HINT_EXPAND, 0.0);
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   evas_object_size_hint_align_set(btn, EVAS_HINT_FILL, 0.0);
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   elm_box_pack_end(box, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "repeated", _btn_cursors_move_cb, &data);
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   evas_object_smart_callback_add(btn, "unpressed", _btn_cursors_release_cb,
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                                  &data);
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   icon = elm_icon_add(win);
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   elm_icon_standard_set(icon, "arrow_up");
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   elm_object_part_content_set(btn, "icon", icon);
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   data.cursors.up = btn;
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   box2 = elm_box_add(win);
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   elm_box_horizontal_set(box2, EINA_TRUE);
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   evas_object_size_hint_weight_set(box2, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
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   evas_object_size_hint_align_set(box2, EVAS_HINT_FILL, EVAS_HINT_FILL);
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   elm_box_pack_end(box, box2);
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   evas_object_show(box2);
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   btn = elm_button_add(win);
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   elm_button_autorepeat_set(btn, EINA_TRUE);
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   elm_button_autorepeat_initial_timeout_set(btn, 1.0);
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   elm_button_autorepeat_gap_timeout_set(btn, 0.5);
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   evas_object_size_hint_weight_set(btn, 0.0, EVAS_HINT_EXPAND);
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   evas_object_size_hint_align_set(btn, 0.0, EVAS_HINT_FILL);
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "repeated", _btn_cursors_move_cb, &data);
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   evas_object_smart_callback_add(btn, "unpressed", _btn_cursors_release_cb,
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                                  &data);
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   icon = elm_icon_add(win);
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   elm_icon_standard_set(icon, "arrow_left");
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   elm_object_part_content_set(btn, "icon", icon);
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   data.cursors.left = btn;
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   btn = elm_button_add(win);
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   evas_object_size_hint_weight_set(btn, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   icon = elm_icon_add(win);
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   elm_icon_standard_set(icon, "close");
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   elm_object_part_content_set(btn, "icon", icon);
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   data.mid = btn;
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   btn = elm_button_add(win);
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   elm_button_autorepeat_set(btn, EINA_TRUE);
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   elm_button_autorepeat_initial_timeout_set(btn, 1.0);
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   elm_button_autorepeat_gap_timeout_set(btn, 0.5);
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   evas_object_size_hint_weight_set(btn, 0.0, EVAS_HINT_EXPAND);
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   evas_object_size_hint_align_set(btn, 0.0, EVAS_HINT_FILL);
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   elm_box_pack_end(box2, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "repeated", _btn_cursors_move_cb, &data);
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   evas_object_smart_callback_add(btn, "unpressed", _btn_cursors_release_cb,
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                                  &data);
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   icon = elm_icon_add(win);
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   elm_icon_standard_set(icon, "arrow_right");
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   elm_object_part_content_set(btn, "icon", icon);
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   data.cursors.right = btn;
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   btn = elm_button_add(win);
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   elm_button_autorepeat_set(btn, EINA_TRUE);
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   elm_button_autorepeat_initial_timeout_set(btn, 1.0);
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   elm_button_autorepeat_gap_timeout_set(btn, 0.5);
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   evas_object_size_hint_weight_set(btn, EVAS_HINT_EXPAND, 0.0);
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   evas_object_size_hint_align_set(btn, EVAS_HINT_FILL, 0.0);
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   elm_box_pack_end(box, btn);
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   evas_object_show(btn);
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   evas_object_smart_callback_add(btn, "repeated", _btn_cursors_move_cb, &data);
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   evas_object_smart_callback_add(btn, "unpressed", _btn_cursors_release_cb,
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                                  &data);
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   icon = elm_icon_add(win);
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   elm_icon_standard_set(icon, "arrow_down");
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   elm_object_part_content_set(btn, "icon", icon);
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   data.cursors.down = btn;
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   evas_object_resize(win, 300, 320);
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   evas_object_show(win);
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   elm_run();
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   return 0;
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}
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ELM_MAIN()
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