efl/legacy/elementary/src/lib/elm_panel.h

   /**
    * @defgroup Panel Panel
    *
    * @image html img/widget/panel/preview-00.png
    * @image latex img/widget/panel/preview-00.eps
    *
    * @brief A panel is a type of animated container that contains subobjects.
    * It can be expanded or contracted by clicking the button on it's edge.
    *
    * Orientations are as follows:
    * @li ELM_PANEL_ORIENT_TOP
    * @li ELM_PANEL_ORIENT_LEFT
    * @li ELM_PANEL_ORIENT_RIGHT
    *
    * Default contents parts of the panel widget that you can use for are:
    * @li "default" - A content of the panel
    *
    * @ref tutorial_panel shows one way to use this widget.
    * @{
    */
   typedef enum _Elm_Panel_Orient
     {
        ELM_PANEL_ORIENT_TOP, /**< Panel (dis)appears from the top */
        ELM_PANEL_ORIENT_BOTTOM, /**< Not implemented */
        ELM_PANEL_ORIENT_LEFT, /**< Panel (dis)appears from the left */
        ELM_PANEL_ORIENT_RIGHT, /**< Panel (dis)appears from the right */
     } Elm_Panel_Orient;

   /**
    * @brief Adds a panel object
    *
    * @param parent The parent object
    *
    * @return The panel object, or NULL on failure
    */
   EAPI Evas_Object          *elm_panel_add(Evas_Object *parent) EINA_ARG_NONNULL(1);

   /**
    * @brief Sets the orientation of the panel
    *
    * @param parent The parent object
    * @param orient The panel orientation. Can be one of the following:
    * @li ELM_PANEL_ORIENT_TOP
    * @li ELM_PANEL_ORIENT_LEFT
    * @li ELM_PANEL_ORIENT_RIGHT
    *
    * Sets from where the panel will (dis)appear.
    */
   EAPI void                  elm_panel_orient_set(Evas_Object *obj, Elm_Panel_Orient orient) EINA_ARG_NONNULL(1);

   /**
    * @brief Get the orientation of the panel.
    *
    * @param obj The panel object
    * @return The Elm_Panel_Orient, or ELM_PANEL_ORIENT_LEFT on failure.
    */
   EAPI Elm_Panel_Orient      elm_panel_orient_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

   /**
    * @brief Set the content of the panel.
    *
    * @param obj The panel object
    * @param content The panel content
    *
    * Once the content object is set, a previously set one will be deleted.
    * If you want to keep that old content object, use the
    * elm_panel_content_unset() function.
    *
    * @deprecated use elm_object_content_set() instead
    *
    */
   EINA_DEPRECATED EAPI void                  elm_panel_content_set(Evas_Object *obj, Evas_Object *content) EINA_ARG_NONNULL(1);

   /**
    * @brief Get the content of the panel.
    *
    * @param obj The panel object
    * @return The content that is being used
    *
    * Return the content object which is set for this widget.
    *
    * @see elm_panel_content_set()
    *
    * @deprecated use elm_object_content_get() instead
    *
    */
   EINA_DEPRECATED EAPI Evas_Object          *elm_panel_content_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

   /**
    * @brief Unset the content of the panel.
    *
    * @param obj The panel object
    * @return The content that was being used
    *
    * Unparent and return the content object which was set for this widget.
    *
    * @see elm_panel_content_set()
    *
    * @deprecated use elm_object_content_unset() instead
    *
    */
   EINA_DEPRECATED EAPI Evas_Object          *elm_panel_content_unset(Evas_Object *obj) EINA_ARG_NONNULL(1);

   /**
    * @brief Set the state of the panel.
    *
    * @param obj The panel object
    * @param hidden If true, the panel will run the animation to contract
    */
   EAPI void                  elm_panel_hidden_set(Evas_Object *obj, Eina_Bool hidden) EINA_ARG_NONNULL(1);

   /**
    * @brief Get the state of the panel.
    *
    * @param obj The panel object
    * @param hidden If true, the panel is in the "hide" state
    */
   EAPI Eina_Bool             elm_panel_hidden_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

   /**
    * @brief Toggle the hidden state of the panel from code
    *
    * @param obj The panel object
    */
   EAPI void                  elm_panel_toggle(Evas_Object *obj) EINA_ARG_NONNULL(1);

   /**
    * @}
    */