自学教程：C++ EAIL_WIDGET函数代码示例

/** * @brief Implementation of get_image_position from AtkImage interface * * @param image EailButton instance * @param [out] x horizontal coordinate * @param [out] y vertical coordinate * @param coord_type coord type */static voideail_button_get_image_position(AtkImage     *image,                               gint         *x,                               gint         *y,                               AtkCoordType  coord_type){    Evas_Object *button_image;    Evas_Object *widget;    AtkObject *obj;    widget = eail_widget_get_widget(EAIL_WIDGET(image));    if (!widget)    {        *x = G_MININT;        *y = G_MININT;        return;    }    button_image = elm_object_part_content_get(widget, "icon");    if (button_image)    {        obj = eail_factory_get_accessible(button_image);        atk_image_get_image_position(ATK_IMAGE(obj), x, y, coord_type);    }    else    {        *x = G_MININT;        *y = G_MININT;    }}

/** * @brief Implementation AtkObject->ref_child callback * * ATK doc says:/n * Gets a reference to the specified accessible child of the object. The * accessible children are 0-based so the first accessible child is at index 0, * the second at index 1 and so on. * * @returns an AtkObject representing the specified accessible child of the * accessible. */static AtkObject *eail_naviframe_ref_child(AtkObject *obj, gint i){   Eina_List *list;   EailNaviframe *naviframe;   EailWidget *widget;   Evas_Object *e_object;   g_return_val_if_fail(EAIL_IS_NAVIFRAME(obj), NULL);   naviframe = EAIL_NAVIFRAME(obj);   widget = EAIL_WIDGET(naviframe);   e_object = eail_widget_get_widget(widget);   list = elm_naviframe_items_get(e_object);   int list_count = eina_list_count(list);   if (i >= list_count)     {        eina_list_free(list);        return NULL;     }   AtkObject *child = eail_naviframe_page_new(obj, i);   atk_object_initialize(child, eina_list_nth(list, i));   g_object_ref(child);   naviframe->cached_pages = eina_list_append(naviframe->cached_pages, child);   eina_list_free(list);   return child;}

/** * @brief Gets obj state set * * The caller must unreference it when it is no longer needed * * @param obj an AtkObject * @return obj state set */static AtkStateSet *eail_multibuttonentry_ref_state_set(AtkObject *obj){   AtkStateSet *state_set;   Evas_Object *widget;   g_return_val_if_fail(EAIL_MULTIBUTTONENTRY(obj), NULL);   widget = eail_widget_get_widget(EAIL_WIDGET(obj));   state_set = ATK_OBJECT_CLASS(eail_multibuttonentry_parent_class)->ref_state_set(obj);   if (!widget) return state_set;   if (elm_multibuttonentry_expanded_get(widget))     {        atk_state_set_add_state(state_set, ATK_STATE_EXPANDED);        if (elm_multibuttonentry_editable_get(widget))            atk_state_set_add_state(state_set, ATK_STATE_EDITABLE);     }   else     {        atk_state_set_add_state(state_set, ATK_STATE_DEFAULT);     }   return state_set;}

/** * @brief Implementation of get_image_size from AtkImage interface * * @param image EailButton instance * @param [out] width width image * @param [out] height height image */static voideail_button_get_image_size(AtkImage *image,                           gint     *width,                           gint     *height){    Evas_Object *widget;    Evas_Object *button_image;    AtkObject *obj;    widget = eail_widget_get_widget(EAIL_WIDGET(image));    if (!widget)    {        *width = -1;        *height = -1;        return;    }    button_image = elm_object_part_content_get(widget, "icon");    if (button_image)    {        obj = eail_factory_get_accessible(button_image);        atk_image_get_image_size(ATK_IMAGE(obj), width, height);    }    else    {        *width = -1;        *height = -1;    }}

/** * @brief Cuts text content from entry to clipboard * * @param text an AtkEditableText * @param start_pos start position of cursor * @param end_pos end position of cursor */static voideail_multibuttonentry_cut_text(AtkEditableText *text,                    gint             start_pos,                    gint             end_pos){   Evas_Object *widget;   Evas_Object *entry;   const char *entry_text;   char *tmp;   GString *s;   widget = eail_widget_get_widget(EAIL_WIDGET(text));   if (!widget || !elm_multibuttonentry_editable_get(widget)) return;   entry = elm_multibuttonentry_entry_get(widget);   entry_text = elm_entry_entry_get(entry);   tmp = eail_get_substring(entry_text, start_pos, end_pos);   eail_clipboard_set_text(tmp);   g_free(tmp);   s = g_string_new(entry_text);   s = g_string_erase(s, start_pos, end_pos - start_pos);   elm_entry_entry_set(entry, s->str);   g_string_free(s, TRUE);}

/** * @brief Initializer for AtkObjectClass * * @param obj an AtkObject * @param data initialization data */static voideail_naviframe_initialize(AtkObject *obj, gpointer data){   Evas_Object *nested_widget = NULL;   EailNaviframe *naviframe_obj = NULL;   ATK_OBJECT_CLASS(eail_naviframe_parent_class)->initialize(obj, data);   obj->role = ATK_ROLE_PAGE_TAB_LIST;   g_return_if_fail(EAIL_IS_WIDGET(obj));   nested_widget = eail_widget_get_widget(EAIL_WIDGET(obj));   if (!nested_widget)     {        ERR("No evas object inside EailWidget was found");        return;     }   evas_object_smart_callback_add(nested_widget, "transition,finished",                                _eail_naviframe_handle_page_changed_event, obj);   eail_naviframe_actions_init(EAIL_ACTION_WIDGET(obj));   naviframe_obj = EAIL_NAVIFRAME(obj);   /* storing last numbers of children to be for checking if children-changed    * signal has to be propagated */   naviframe_obj->child_count_last = eail_naviframe_n_children_get(obj);}

/** * @brief Gets multibuttonentry items list * * @param multibuttonentry an EailMultibuttonentry * @return multibuttonentry items list * */static const Eina_List *eail_multibuttonentry_get_items(EailMultibuttonentry *multibuttonentry){   Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(multibuttonentry));   if (!widget) return NULL;   return elm_multibuttonentry_items_get(widget);}

/** * @brief Get list of created widgets * * @param gengrid EailGengrid instance * * @returns list of widgets elm_gengrid holds */static Eina_List *eail_gengrid_items_get(EailGengrid *gengrid){   g_return_val_if_fail(EAIL_IS_WIDGET(gengrid), NULL);   Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(gengrid));   return elm_gengrid_realized_items_get(widget);}

/** * @brief Implementation AtkObject->get_n_children callback * * ATK doc says:/n * Gets the number of accessible children of the accessible. * * @param obj an AtkObject * * @returns an integer representing the number of accessible children of * the accessible */static ginteail_segment_control_get_n_children(AtkObject *obj){   gint n_items;   Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(obj));   n_items = elm_segment_control_item_count_get(widget);   return n_items;}

/** * @brief gets list of Elm_Object_Item* that is contained in index widget * * @param obj and EailIndex AtkObject * * @returns const Eina_List * with Elm_Object_Item* for every index */static const Eina_List *eail_index_get_index_items(AtkObject *obj) {   Evas_Object *index_widget = NULL;   index_widget = eail_widget_get_widget(EAIL_WIDGET(obj));   g_return_val_if_fail(index_widget, NULL);   ELM_INDEX_DATA_GET(index_widget, index_sd);   g_return_val_if_fail(index_sd, NULL);   return index_sd->items;}

/** * @brief Click action callback * * @param action an AtkAction * @param data data passed to callback * @return TRUE on success, FALSE otherwise */static gboolean_eail_photocam_action_click(AtkAction *action, void *data){   Evas_Object *widget;   g_return_val_if_fail(EAIL_IS_PHOTOCAM(action), FALSE);   widget = eail_widget_get_widget(EAIL_WIDGET(action));   if (!widget) return FALSE;   evas_object_smart_callback_call(widget, "clicked", NULL);   return TRUE;}

/** * @brief Scrollup action callback * * @param action an AtkAction * @param data additional callback data * @returns TRUE on success, FALSE otherwise */static gboolean_action_scroll_up(AtkAction *action,                  void *data){   Evas_Object *widget;   g_return_val_if_fail(EAIL_IS_SCROLLABLE_WIDGET(action), FALSE);   widget = eail_widget_get_widget(EAIL_WIDGET(action));   _eail_scrollable_handle_scroll_event(action, widget, NULL);   return eail_action_scroll_up(widget, NULL);}

/** * @brief Helper function to getting "elm_popup" Evas_Object* from Atk EailPopup * * @returns nested "elm_popup" widget */static Evas_Object *_eail_get_popup_widget_from_atkobj(AtkObject *obj){    Evas_Object *popup_widget = NULL;    popup_widget = eail_widget_get_widget(EAIL_WIDGET(obj));    if (!popup_widget)    {        ERR("No widget found for notification object!");        return NULL;    }    return popup_widget;}

/** * @brief EailSlider object initialization * * @param obj EailSlider object * @param data user set additional initialization data */static voideail_slider_initialize(AtkObject *obj, gpointer data){   Evas_Object *nested_widget = NULL;   ATK_OBJECT_CLASS(eail_slider_parent_class)->initialize(obj, data);   obj->role = ATK_ROLE_SLIDER;   g_return_if_fail(EAIL_IS_WIDGET(obj));   nested_widget = eail_widget_get_widget(EAIL_WIDGET(obj));   evas_object_smart_callback_add(nested_widget, "changed",                                  _eail_slider_handle_changed_event, obj);}

/** * @brief Gets the character at offset * * @param text AtkText instance * @param offset character offset * @returns char representing the character at offset */static gunichareail_button_get_character_at_offset(AtkText    *text,                                    gint        offset){   gunichar character = '/0';   Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(text));   if (widget)     character = g_utf8_get_char(         g_utf8_offset_to_pointer(elm_object_text_get(widget), offset));   return character;}

/** * @brief Gets text bounded by start_offset and end_offset * * Use g_free() to free the returned string. * * @param text AtkText instance * @param start_offset start position * @param end_offset end position, -1 for the end of the string * * @return string containing the text from start_offset up to, * but not including end_offset */static gchar*eail_button_get_text(AtkText   *text,                     gint       start_offset,                     gint       end_offset){   gchar *string = NULL;   Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(text));   if (widget)     string = (gchar *)elm_object_text_get(widget);   return eail_get_substring(string, start_offset, end_offset);}

/** * @brief Implementation of ref_state_set from AtkObject * * @param obj EailGengrid instance * * @returns reference to an state set of accessible */static AtkStateSet *eail_gengrid_ref_state_set(AtkObject *obj){   Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(obj));   AtkStateSet *state_set =      ATK_OBJECT_CLASS(eail_gengrid_parent_class)->ref_state_set(obj);   if (!widget) return state_set;   if (elm_gengrid_multi_select_get(widget))     atk_state_set_add_state(state_set, ATK_STATE_MULTISELECTABLE);   return state_set;}

/** * @brief Inits Action interface for PANEL * * @param action an AtkAction * @param data data passed to callback * @returns TRUE on success, FALSE otherwise */static gbooleaneail_panel_action_toggle(AtkAction *action, void *data){   Evas_Object *widget;   g_return_val_if_fail(EAIL_IS_PANEL(action), FALSE);   widget = eail_widget_get_widget(EAIL_WIDGET(action));   if (!widget) return FALSE;   elm_panel_toggle(widget);   return TRUE;}

/** * @brief Gets the image size * * @param image AtkImage instance * @param [out] width photo width or -1 if value cannot be obtained * @param [out] height photo height or -1 if value cannot be obtained */static voideail_photo_size_get(AtkImage *image, gint *width, gint *height){   g_return_if_fail(ATK_IS_IMAGE(image));   Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(image));   if (!widget)     {        *width = -1;        *height = -1;        return;     }   evas_object_geometry_get(widget, NULL, NULL, width, height);}

/** * @brief Gets name of EailItem * * Implementation of AtkObject->get_name callback * * ATK doc says:/n * Gets the accessible name of the accessible. * * @returns a character string representing the accessible description of * the accessible. */static const gchar *eail_popup_get_name(AtkObject *obj){    Evas_Object *popup_widget = NULL;    popup_widget = eail_widget_get_widget(EAIL_WIDGET(obj));    if (!popup_widget)    {        ERR("No widget found for notification object!");        return NULL;    }    return elm_object_part_text_get(popup_widget, "title,text");}

/** * @brief ZoomOut action callback * * @param action an AtkAction * @param data data passed to callback * @return TRUE on success, FALSE otherwise */static gboolean_eail_photocam_action_zoom_out(AtkAction *action, void *data){   Evas_Object *widget;   double zoom_level;   g_return_val_if_fail(EAIL_IS_PHOTOCAM(action), FALSE);   widget = eail_widget_get_widget(EAIL_WIDGET(action));   if (!widget) return FALSE;   zoom_level = elm_photocam_zoom_get(widget) + EAIL_PHOTOCAM_ZOOM_STEP;   elm_photocam_zoom_set(widget, zoom_level);   return TRUE;}

/** * @brief Prepares Eina_List filled with Elm_Object_Item* objects * representing items in the list * * @return filled list with list items. Call eina_list_free on that list when * results processing has been finished */static Eina_List *eail_genlist_get_items(EailGenlist *genlist){    Eina_List *items = NULL;    Elm_Object_Item *item;    Evas_Object *widget = eail_widget_get_widget(EAIL_WIDGET(genlist));    item = elm_genlist_first_item_get(widget);    while (item) {        items = eina_list_append(items, item);        item = elm_genlist_item_next_get(item);    }    return items;}

/** * @brief Implementation of ref_state_set from AtkObject * * @param object EailVideo instance * * @returns referred AtkStateSet object with accessible state set */static AtkStateSet*eail_video_ref_state_set(AtkObject *object){   AtkStateSet *state_set;   Evas_Object *widget;   g_return_val_if_fail(EAIL_IS_VIDEO(object), NULL);   widget = eail_widget_get_widget(EAIL_WIDGET(object));   if (!widget) return NULL;   state_set = ATK_OBJECT_CLASS(eail_video_parent_class)->ref_state_set(object);   atk_state_set_add_state(state_set, ATK_STATE_ANIMATED);   return state_set;}

/** * @brief Gets slider name * * @param obj EailSlider instance * @returns accessible name */static const gchar*eail_progressbar_get_name(AtkObject *obj){   const gchar *name;   Evas_Object *widget;   name = ATK_OBJECT_CLASS(eail_progressbar_parent_class)->get_name(obj);   if (name) return name;   widget = eail_widget_get_widget(EAIL_WIDGET(obj));   if (widget)     name = (const gchar*)elm_object_text_get(widget);   return name;}

/** * @brief Helper function for getting nested content of elm_popup widget * * @param obj AtkObject instance * * @returns Evas_Object representing the nested widget content * from elm_popup widget */static Evas_Object *_eail_get_nested_widget(AtkObject *obj){   Evas_Object *ctxpopup_widget = NULL, *nested_widget = NULL;   /* getting widget of ctxpopup class */   ctxpopup_widget = eail_widget_get_widget(EAIL_WIDGET(obj));   if (!ctxpopup_widget)     {        ERR("No widget found for EailCtxpopup object!");     }   nested_widget = elm_object_part_content_get(ctxpopup_widget, "default");   return nested_widget;}

/** * @brief Helper function for getting nested content in notify widget * * @param obj an AtkObject * * @returns nested widget content from notify widget */static Evas_Object *_eail_get_nested_widget(AtkObject *obj){   Evas_Object *notify_widget = NULL, *nested_widget = NULL;   /* getting widget of notify class */   notify_widget = eail_widget_get_widget(EAIL_WIDGET(obj));   if (!notify_widget)     {        ERR("No widget found for notification object!");     }   nested_widget = elm_object_part_content_get(notify_widget, "default");   return nested_widget;}

/** * @brief Gets the list of widget's children * * @param widget EailWidget instance * * @returns Eina_list representing the list of children * or NULL if widget has no children */static Eina_List *eail_button_get_widget_children(EailWidget *widget){   Eina_List *list = NULL;   Evas_Object *child, *obj;   obj = eail_widget_get_widget(EAIL_WIDGET(widget));   if (obj)     {        child = elm_object_part_content_get(obj, "icon");        if (child && elm_object_widget_check(child))          list = eina_list_append(list, child);     }   return list;}

/** * @brief 'release' action callback * * @param action AtkAction instance * @param data user data passed to callback * * @returns TRUE if action was successfull, FALSE otherwise */static gbooleaneail_button_action_release_cb(AtkAction *action, void *data){   Evas_Object *widget;   widget = eail_widget_get_widget(EAIL_WIDGET(action));   if (!widget) return FALSE;   if ((elm_object_disabled_get(widget)) || (!evas_object_visible_get(widget)))     return FALSE;   evas_object_smart_callback_call(widget, "unpressed", NULL);   eail_button_atk_notify_release(action, NULL, NULL);   return TRUE;}

/** * @brief Implementation of get_name from AtkObject * * @param object EailVideo instance * * @returns played video file title or NULL if not set */static const gchar*eail_video_name_get(AtkObject *object){   Evas_Object *video;   const gchar *atk_name;   g_return_val_if_fail(EAIL_IS_VIDEO(object), NULL);   atk_name = ATK_OBJECT_CLASS(eail_video_parent_class)->get_name(object);   if (atk_name) return atk_name;   video = eail_widget_get_widget(EAIL_WIDGET(object));   if (!video) return NULL;   return elm_video_title_get(video);}

/** * @brief Implementation of get_n_children from AtkObject interface * * @param obj EailSlideshow instance * @returns number of widget childs */static ginteail_slideshow_n_children_get(AtkObject *obj){   Evas_Object *widget;   gint items_count;   g_return_val_if_fail(EAIL_IS_SLIDESHOW(obj), 0);   widget = eail_widget_get_widget(EAIL_WIDGET(obj));   if (!widget) return 0;   /*the real number of items stored in slideshow widget is returned by     elm_slideshow_count_get. However we will not be able to return all items     widget since only those stored in cache are created.*/   items_count = elm_slideshow_count_get(widget);   return items_count;}