I’m trying to capture getsture events on top of GLView, but it failed.

I tried capture gesture events on top of box as below codes, it works.

    /* Box */
 ad->box = elm_box_add(ad->conform);
 evas_object_size_hint_weight_set(ad->box, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 elm_box_padding_set(ad->box, 0, 5 * elm_config_scale_get());

 /* Event Rect */
 ad->rect = evas_object_rectangle_add(evas_object_evas_get(ad->box));
 evas_object_size_hint_weight_set(ad->rect, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
 evas_object_size_hint_align_set(ad->rect, EVAS_HINT_FILL, EVAS_HINT_FILL);
 evas_object_color_set(ad->rect, 0, 204, 0, 255);
 evas_object_repeat_events_set(ad->rect, EINA_TRUE);

 /* Create getsture layer*/
 Evas_Object *ges = elm_gesture_layer_add(ad->box);
 elm_gesture_layer_attach(ges, ad->rect);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_START, zoom_start_cb, ad);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_MOVE, zoom_move_cb, ad);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_END, zoom_end_cb, ad);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_ABORT, zoom_abort_cb, ad);
 elm_box_pack_end(ad->box, ad->rect);
 evas_object_show(ad->rect);

 elm_object_content_set(ad->conform, ad->box);
 evas_object_show(ad->box);

When I do zoom operation on screen, all zoom_**_cb been called.

but when I do almost samething on GLView, it failed. No zoom_**_cb is called when doing zoom operation.

    /* Create and initialize GLView */
 gl = elm_glview_add(ad->conform);
 ELEMENTARY_GLVIEW_GLOBAL_USE(gl);
 evas_object_size_hint_align_set(gl, EVAS_HINT_FILL, EVAS_HINT_FILL);
 evas_object_size_hint_weight_set(gl, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);

 /* Request a surface with alpha and a depth buffer */
 elm_glview_mode_set(gl, ELM_GLVIEW_DEPTH);

 /* The resize policy tells GLView what to do with the surface when it
  * resizes. ELM_GLVIEW_RESIZE_POLICY_RECREATE will tell it to
  * destroy the current surface and recreate it to the new size.
  */
 elm_glview_resize_policy_set(gl, ELM_GLVIEW_RESIZE_POLICY_RECREATE);

 /* The render policy sets how GLView should render GL code.
  * ELM_GLVIEW_RENDER_POLICY_ON_DEMAND will have the GL callback
  * called only when the object is visible.
  * ELM_GLVIEW_RENDER_POLICY_ALWAYS would cause the callback to be
  * called even if the object were hidden.
  */
 elm_glview_render_policy_set(gl, ELM_GLVIEW_RENDER_POLICY_ON_DEMAND);

 /* The initialize callback function gets registered here */
 elm_glview_init_func_set(gl, init_gl);

 /* The delete callback function gets registered here */
 elm_glview_del_func_set(gl, del_gl);

 /* The render callback function gets registered here */
 elm_glview_render_func_set(gl, draw_gl);

 /* Event Rect */
 ad->rect = evas_object_rectangle_add(evas_object_evas_get(gl));
 evas_object_size_hint_weight_set(ad->rect, EVAS_HINT_EXPAND,
   EVAS_HINT_EXPAND);
 evas_object_size_hint_align_set(ad->rect, EVAS_HINT_FILL, EVAS_HINT_FILL);
 evas_object_color_set(ad->rect, 0, 204, 0, 255);
 evas_object_repeat_events_set(ad->rect, EINA_TRUE);

 /* Create getsture layer*/
 Evas_Object *ges = elm_gesture_layer_add(gl);
 elm_gesture_layer_attach(ges, ad->rect);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_START,
   zoom_start_cb, ad);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_MOVE,
   zoom_move_cb, ad);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_END,
   zoom_end_cb, ad);
 elm_gesture_layer_cb_set(ges, ELM_GESTURE_ZOOM, ELM_GESTURE_STATE_ABORT,
   zoom_abort_cb, ad);
 elm_box_pack_end(gl, ad->rect);
 evas_object_show(ad->rect);

 /* Add the GLView to the conformant and show it */
 elm_object_content_set(ad->conform, gl);
 evas_object_show(gl);

 elm_object_focus_set(gl, EINA_TRUE);


 /* This adds an animator so that the app will regularly
  * trigger updates of the GLView using elm_glview_changed_set().
  *
  * NOTE: If you delete GL, this animator will keep running trying to access
  * GL so this animator needs to be deleted with ecore_animator_del().
  */
 ani = ecore_animator_add(anim, gl);
 evas_object_data_set(gl, "ani", ani);
 evas_object_data_set(gl, "ad", ad);
 evas_object_event_callback_add(gl, EVAS_CALLBACK_DEL, del_anim, gl);

 evas_object_event_callback_add(gl, EVAS_CALLBACK_MOUSE_DOWN, mouse_down_cb, ad);
 evas_object_event_callback_add(gl, EVAS_CALLBACK_MOUSE_UP, mouse_up_cb, ad);
 evas_object_event_callback_add(gl, EVAS_CALLBACK_MOUSE_MOVE, mouse_move_cb, ad);

 evas_object_show(ad->win);