efl_ui_focus: add flag to indicate if a child has the focus

this is usefull for later implementations in spinner and fileselector.
A event for this was not added because the result is only really usefull
after a focus operation has been successfull.

Differential Revision: https://phab.enlightenment.org/D7102

src/lib/elementary/efl_ui_focus_object.c

@@ -10,6 +10,7 @@
 typedef struct {
   Eina_Bool old_focus;
   Eina_Bool ongoing_prepare_call;
+  Eina_Bool child_focus;
 } Efl_Ui_Focus_Object_Data;
 
 EOLIAN static void
@@ -18,6 +19,7 @@ _efl_ui_focus_object_focus_set(Eo *obj, Efl_Ui_Focus_Object_Data *pd, Eina_Bool
    if (pd->old_focus == focus) return;
 
    pd->old_focus = focus;
+   efl_ui_focus_object_child_focus_set(efl_ui_focus_object_focus_parent_get(obj), focus);
    efl_event_callback_call(obj, EFL_UI_FOCUS_OBJECT_EVENT_FOCUS_CHANGED , (void*) (uintptr_t) focus);
 }
 
@@ -39,6 +41,21 @@ _efl_ui_focus_object_prepare_logical(Eo *obj, Efl_Ui_Focus_Object_Data *pd)
   pd->ongoing_prepare_call = EINA_FALSE;
 }
 
+EOLIAN static void
+_efl_ui_focus_object_child_focus_set(Eo *obj, Efl_Ui_Focus_Object_Data *pd, Eina_Bool child_focus)
+{
+   if (child_focus == pd->child_focus) return;
+
+   pd->child_focus = child_focus;
+   efl_ui_focus_object_child_focus_set(efl_ui_focus_object_focus_parent_get(obj), pd->child_focus);
+}
+
+EOLIAN static Eina_Bool
+_efl_ui_focus_object_child_focus_get(const Eo *obj EINA_UNUSED, Efl_Ui_Focus_Object_Data *pd)
+{
+   return pd->child_focus;
+}
+
 
 
 #include "efl_ui_focus_object.eo.c"

src/lib/elementary/efl_ui_focus_object.eo

@@ -54,6 +54,12 @@ mixin Efl.Ui.Focus.Object
                 logical_parent : Efl.Ui.Focus.Object; [[The focus parent.]]
             }
         }
+        @property child_focus @protected {
+            [[set if a child of this element has focus or not.]]
+            values {
+               child_focus : bool;
+            }
+        }
         prepare_logical {
             [[Tells the object that its children will be queried soon by the given manager.
               The call will be a NOP if there is already a active preprare_logical call on this object