tizen - How can I center vertically a label? -

i'm developing native app samsung gear (tizen). have multi line label dynamically generated (can have 2 or 3 lines). how can center vertically?

use elementary box container. align childs in vertical middle.

here sample code. refer code box , 3 labels in app_create function.

#include <sstream>  #include <app.h> #include <elementary.h> #include <efl_extension.h>  static bool app_create(void *data) {     evas_object *win = elm_win_util_standard_add("sample", "sample");     elm_win_autodel_set(win, eina_true);      if (elm_win_wm_rotation_supported_get(win)) {         int rots[4] = { 0, 90, 180, 270 };         elm_win_wm_rotation_available_rotations_set(win, (const int *)(&rots), 4);     }      auto back_cb = [](void *data, evas_object *obj, void *event_info) {         elm_win_lower(static_cast<evas_object*>(data));     };      evas_object_smart_callback_add(win, "delete,request",             [](void*, evas_object*, void*){ui_app_exit();}, null);     eext_object_event_callback_add(win, eext_callback_back, back_cb, win);      evas_object *conform = elm_conformant_add(win);     elm_win_indicator_mode_set(win, elm_win_indicator_show);     elm_win_indicator_opacity_set(win, elm_win_indicator_opaque);     evas_object_size_hint_weight_set(conform, evas_hint_expand, evas_hint_expand);     elm_win_resize_object_add(win, conform);     evas_object_show(conform);      evas_object *box = elm_box_add(conform);     evas_object_show(box);     elm_object_content_set(conform, box);      evas_object *labels[3];      (int i=0; i<3; i++)     {         std::ostringstream ss;         ss << "<align=center>line : " << << "</align>";         labels[i] = elm_label_add(box);         elm_object_text_set(labels[i], ss.str().c_str());         evas_object_show(labels[i]);         elm_box_pack_end(box, labels[i]);     }      evas_object_show(win);     return true; }   int main(int argc, char *argv[]) {     ui_app_lifecycle_callback_s event_callback = {             app_create, nullptr, nullptr, nullptr, nullptr     };     return ui_app_main(argc, argv, &event_callback, nullptr); }