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How can I capture gesture events on top of GLView?

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);

 

 

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Responses

4 Replies
Alex Dem

Hi,
Maybe for your case you do not need rectangle at all?  You could use ad->win as parent for elm_gesture layer_add, but maybe could use only elm_glview

  Evas_Object *gestLayer;
  gestLayer = elm_gesture_layer_add(gl);
  elm_gesture_layer_attach(gestLayer, gl);

It should works.
Alexey.

Alex Dem

Also, I guess your rectangle size is 0x0
and maybe win & conform sizes are something like: 1x1 
otherwise your rectangle should fully cover elm_glview and should be filled with mentioned color. And zoom gestures should works if rectangle is visible.
Alexey.

Jean Yang

Thanks Alex, directly attach gesture layer to GLView works.

And to my understanding, parent can be both ad->win and glview, parent only means who will in charge of destroy the gesturelayer created in the code.

Alex Dem

Hi,
fyi: Of course you could try to add over glView completely transparent rectangle and resize it.

    evas_object_color_set(ad->rect, 0, 0, 0, 0);
    evas_object_move(ad->rect,0,0);
    evas_object_resize(ad->rect, screen_w,screen_h);

and attach gesture layer to it.
Alexey.