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#ifndef _EVAS_H
# error You shall not include this header directly
#endif

/**
 * @ingroup Evas_Canvas
 *
 * @{
 */
/**
 * Creates a new empty evas.
 *
 * Note that before you can use the evas, you will to at a minimum:
 * @li Set its render method with @ref evas_output_method_set .
 * @li Set its viewport size with @ref evas_output_viewport_set .
 * @li Set its size of the canvas with @ref evas_output_size_set .
 * @li Ensure that the render engine is given the correct settings
 *     with @ref evas_engine_info_set .
 *
 * This function should only fail if the memory allocation fails
 *
 * @note this function is very low level. Instead of using it
 *       directly, consider using the high level functions in
 *       @ref Ecore_Evas_Group such as @c ecore_evas_new(). See
 *       @ref Ecore.
 *
 * @attention it is recommended that one calls evas_init() before
 *       creating new canvas.
 *
 * @return A new uninitialised Evas canvas on success. Otherwise, @c NULL.
 * @ingroup Evas_Canvas
 */
EAPI Evas             *evas_new(void) EINA_WARN_UNUSED_RESULT EINA_MALLOC;

/**
 * Frees the given evas and any objects created on it.
 *
 * Any objects with 'free' callbacks will have those callbacks called
 * in this function.
 *
 * @param   e The given evas.
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_free(Evas *e)  EINA_ARG_NONNULL(1);

#include "canvas/evas_canvas.eo.legacy.h"

/**
 * @}
 */


/**
 * @ingroup Evas_Canvas_Events
 *
 * @{
 */

/**
 * Add (register) a callback function to a given canvas event.
 *
 * @param e Canvas to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param func The (callback) function to be called when the event is
 *        triggered
 * @param data The data pointer to be passed to @p func
 *
 * This function adds a function callback to the canvas @p e when the
 * event of type @p type occurs on it. The function pointer is @p
 * func.
 *
 * In the event of a memory allocation error during the addition of
 * the callback to the canvas, evas_alloc_error() should be used to
 * determine the nature of the error, if any, and the program should
 * sensibly try and recover.
 *
 * A callback function must have the ::Evas_Event_Cb prototype
 * definition. The first parameter (@p data) in this definition will
 * have the same value passed to evas_event_callback_add() as the @p
 * data parameter, at runtime. The second parameter @p e is the canvas
 * pointer on which the event occurred. The third parameter @p
 * event_info is a pointer to a data structure that may or may not be
 * passed to the callback, depending on the event type that triggered
 * the callback. This is so because some events don't carry extra
 * context with them, but others do.
 *
 * The event type @p type to trigger the function may be one of
 * #EVAS_CALLBACK_RENDER_FLUSH_PRE, #EVAS_CALLBACK_RENDER_FLUSH_POST,
 * #EVAS_CALLBACK_CANVAS_FOCUS_IN, #EVAS_CALLBACK_CANVAS_FOCUS_OUT,
 * #EVAS_CALLBACK_CANVAS_OBJECT_FOCUS_IN and
 * #EVAS_CALLBACK_CANVAS_OBJECT_FOCUS_OUT. This determines the kind of
 * event that will trigger the callback to be called. Only the last
 * two of the event types listed here provide useful event information
 * data -- a pointer to the recently focused Evas object. For the
 * others the @p event_info pointer is going to be @c NULL.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_event_callback_add(d.canvas, EVAS_CALLBACK_RENDER_FLUSH_PRE
 * @until two canvas event callbacks
 *
 * Looking to the callbacks registered above,
 * @dontinclude evas-events.c
 * @skip called when our rectangle gets focus
 * @until let's have our events back
 *
 * we see that the canvas flushes its rendering pipeline
 * (#EVAS_CALLBACK_RENDER_FLUSH_PRE) whenever the @c _resize_cb
 * routine takes place: it has to redraw that image at a different
 * size. Also, the callback on an object being focused comes just
 * after we focus it explicitly, on code.
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * @note Be careful not to add the same callback multiple times, if
 * that's not what you want, because Evas won't check if a callback
 * existed before exactly as the one being registered (and thus, call
 * it more than once on the event, in this case). This would make
 * sense if you passed different functions and/or callback data, only.
 */
EAPI void  evas_event_callback_add(Evas *e, Evas_Callback_Type type, Evas_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * Add (register) a callback function to a given canvas event with a
 * non-default priority set. Except for the priority field, it's exactly the
 * same as @ref evas_event_callback_add
 *
 * @param e Canvas to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param priority The priority of the callback, lower values called first.
 * @param func The (callback) function to be called when the event is
 *        triggered
 * @param data The data pointer to be passed to @p func
 *
 * @see evas_event_callback_add
 * @since 1.1
 */
EAPI void  evas_event_callback_priority_add(Evas *e, Evas_Callback_Type type, Evas_Callback_Priority priority, Evas_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 4);

/**
 * Delete a callback function from the canvas.
 *
 * @param e Canvas to remove a callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was triggered
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes the most recently added callback from the
 * canvas @p e which was triggered by the event type @p type and was
 * calling the function @p func when triggered. If the removal is
 * successful it will also return the data pointer that was passed to
 * evas_event_callback_add() when the callback was added to the
 * canvas. If not successful @c NULL will be returned.
 *
 * Example:
 * @code
 * extern Evas *e;
 * void *my_data;
 * void focus_in_callback(void *data, Evas *e, void *event_info);
 *
 * my_data = evas_event_callback_del(ebject, EVAS_CALLBACK_CANVAS_FOCUS_IN, focus_in_callback);
 * @endcode
 */
EAPI void *evas_event_callback_del(Evas *e, Evas_Callback_Type type, Evas_Event_Cb func) EINA_ARG_NONNULL(1, 3);

/**
 * Delete (unregister) a callback function registered to a given
 * canvas event.
 *
 * @param e Canvas to remove an event callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was
 *        triggered
 * @param data The data pointer that was to be passed to the callback
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes <b>the first</b> added callback from the
 * canvas @p e matching the event type @p type, the registered
 * function pointer @p func and the callback data pointer @p data. If
 * the removal is successful it will also return the data pointer that
 * was passed to evas_event_callback_add() (that will be the same as
 * the parameter) when the callback(s) was(were) added to the
 * canvas. If not successful @c NULL will be returned. A common use
 * would be to remove an exact match of a callback.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_event_callback_del_full(evas, EVAS_CALLBACK_RENDER_FLUSH_PRE,
 * @until _object_focus_in_cb, NULL);
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * @note For deletion of canvas events callbacks filtering by just
 * type and function pointer, user evas_event_callback_del().
 */
EAPI void *evas_event_callback_del_full(Evas *e, Evas_Callback_Type type, Evas_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * Push a callback on the post-event callback stack
 *
 * @param e Canvas to push the callback on
 * @param func The function that to be called when the stack is unwound
 * @param data The data pointer to be passed to the callback
 *
 * Evas has a stack of callbacks that get called after all the callbacks for
 * an event have triggered (all the objects it triggers on and all the callbacks
 * in each object triggered). When all these have been called, the stack is
 * unwond from most recently to least recently pushed item and removed from the
 * stack calling the callback set for it.
 *
 * This is intended for doing reverse logic-like processing, example - when a
 * child object that happens to get the event later is meant to be able to
 * "steal" functions from a parent and thus on unwind of this stack have its
 * function called first, thus being able to set flags, or return 0 from the
 * post-callback that stops all other post-callbacks in the current stack from
 * being called (thus basically allowing a child to take control, if the event
 * callback prepares information ready for taking action, but the post callback
 * actually does the action).
 *
 */
EAPI void  evas_post_event_callback_push(Evas *e, Evas_Object_Event_Post_Cb func, const void *data);

/**
 * Remove a callback from the post-event callback stack
 *
 * @param e Canvas to push the callback on
 * @param func The function that to be called when the stack is unwound
 *
 * This removes a callback from the stack added with
 * evas_post_event_callback_push(). The first instance of the function in
 * the callback stack is removed from being executed when the stack is
 * unwound. Further instances may still be run on unwind.
 */
EAPI void  evas_post_event_callback_remove(Evas *e, Evas_Object_Event_Post_Cb func);

/**
 * Remove a callback from the post-event callback stack
 *
 * @param e Canvas to push the callback on
 * @param func The function that to be called when the stack is unwound
 * @param data The data pointer to be passed to the callback
 *
 * This removes a callback from the stack added with
 * evas_post_event_callback_push(). The first instance of the function and data
 * in the callback stack is removed from being executed when the stack is
 * unwound. Further instances may still be run on unwind.
 */
EAPI void  evas_post_event_callback_remove_full(Evas *e, Evas_Object_Event_Post_Cb func, const void *data);

/**
 * @}
 */

/**
 * @ingroup Evas_Event_Feeding_Group
 *
 * @{
 */

/**
 * Freeze all input events processing.
 *
 * @param e The canvas to freeze input events processing on.
 *
 * This function will indicate to Evas that the canvas @p e is to have
 * all input event processing frozen until a matching
 * evas_event_thaw() function is called on the same canvas. All events
 * of this kind during the freeze will get @b discarded. Every freeze
 * call must be matched by a thaw call in order to completely thaw out
 * a canvas (i.e. these calls may be nested). The most common use is
 * when you don't want the user to interact with your user interface
 * when you're populating a view or changing the layout.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip freeze input for 3 seconds
 * @until }
 * @dontinclude evas-events.c
 * @skip let's have our events back
 * @until }
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * If you run that example, you'll see the canvas ignoring all input
 * events for 3 seconds, when the "f" key is pressed. In a more
 * realistic code we would be freezing while a toolkit or Edje was
 * doing some UI changes, thawing it back afterwards.
 */
EAPI void             evas_event_freeze(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Thaw a canvas out after freezing (for input events).
 *
 * @param e The canvas to thaw out.
 *
 * This will thaw out a canvas after a matching evas_event_freeze()
 * call. If this call completely thaws out a canvas, i.e., there's no
 * other unbalanced call to evas_event_freeze(), events will start to
 * be processed again, but any "missed" events will @b not be
 * evaluated.
 *
 * See evas_event_freeze() for an example.
 */
EAPI void             evas_event_thaw(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Return the freeze count on input events of a given canvas.
 *
 * @param e The canvas to fetch the freeze count from.
 *
 * This returns the number of times the canvas has been told to freeze
 * input events. It is possible to call evas_event_freeze() multiple
 * times, and these must be matched by evas_event_thaw() calls. This
 * call allows the program to discover just how many times things have
 * been frozen in case it may want to break out of a deep freeze state
 * where the count is high.
 *
 * Example:
 * @code
 * extern Evas *evas;
 *
 * while (evas_event_freeze_get(evas) > 0) evas_event_thaw(evas);
 * @endcode
 *
 */
EAPI int              evas_event_freeze_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * After thaw of a canvas, re-evaluate the state of objects and call callbacks
 *
 * @param e The canvas to evaluate after a thaw
 *
 * This is normally called after evas_event_thaw() to re-evaluate mouse
 * containment and other states and thus also call callbacks for mouse in and
 * out on new objects if the state change demands it.
 */
EAPI void             evas_event_thaw_eval(Evas *e) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Font_Group
 *
 * @{
 */

/**
 * Free list of font descriptions returned by evas_font_dir_available_list().
 *
 * @param e The evas instance that returned such list.
 * @param available the list returned by evas_font_dir_available_list().
 *
 * @ingroup Evas_Font_Group
 */
EAPI void                    evas_font_available_list_free(Evas *e, Eina_List *available) EINA_ARG_NONNULL(1);

/**
 * @ingroup Evas_Object_Group_Basic
 *
 * @{
 */

/**
 * Increments object reference count to defer its deletion.
 *
 * @param obj The given Evas object to reference
 *
 * This increments the reference count of an object, which if greater
 * than 0 will defer deletion by evas_object_del() until all
 * references are released back (counter back to 0). References cannot
 * go below 0 and unreferencing past that will result in the reference
 * count being limited to 0. References are limited to <c>2^32 - 1</c>
 * for an object. Referencing it more than this will result in it
 * being limited to this value.
 *
 * @see evas_object_unref()
 * @see evas_object_del()
 *
 * @note This is a <b>very simple</b> reference counting mechanism! For
 * instance, Evas is not ready to check for pending references on a
 * canvas deletion, or things like that. This is useful on scenarios
 * where, inside a code block, callbacks exist which would possibly
 * delete an object we are operating on afterwards. Then, one would
 * evas_object_ref() it on the beginning of the block and
 * evas_object_unref() it on the end. It would then be deleted at this
 * point, if it should be.
 *
 * Example:
 * @code
 *  evas_object_ref(obj);
 *
 *  // action here...
 *  evas_object_smart_callback_call(obj, SIG_SELECTED, NULL);
 *  // more action here...
 *  evas_object_unref(obj);
 * @endcode
 *
 * @ingroup Evas_Object_Group_Basic
 * @since 1.1
 */
EAPI void             evas_object_ref(Evas_Object *obj);

/**
 * Decrements object reference count.
 *
 * @param obj The given Evas object to unreference
 *
 * This decrements the reference count of an object. If the object has
 * had evas_object_del() called on it while references were more than
 * 0, it will be deleted at the time this function is called and puts
 * the counter back to 0. See evas_object_ref() for more information.
 *
 * @see evas_object_ref() (for an example)
 * @see evas_object_del()
 *
 * @ingroup Evas_Object_Group_Basic
 * @since 1.1
 */
EAPI void             evas_object_unref(Evas_Object *obj);

/**
 * Get the object reference count.
 *
 * @param obj The given Evas object to query
 *
 * This gets the reference count for an object (normally 0 until it is
 * referenced). Values of 1 or greater mean that someone is holding a
 * reference to this object that needs to be unreffed before it can be
 * deleted.
 *
 * @see evas_object_ref()
 * @see evas_object_unref()
 * @see evas_object_del()
 *
 * @ingroup Evas_Object_Group_Basic
 * @since 1.2
 */
EAPI int              evas_object_ref_get(const Evas_Object *obj);

/**
 * Marks the given Evas object for deletion (when Evas will free its
 * memory).
 *
 * @param obj The given Evas object.
 *
 * This call will mark @p obj for deletion, which will take place
 * whenever it has no more references to it (see evas_object_ref() and
 * evas_object_unref()).
 *
 * At actual deletion time, which may or may not be just after this
 * call, ::EVAS_CALLBACK_DEL and ::EVAS_CALLBACK_FREE callbacks will
 * be called. If the object currently had the focus, its
 * ::EVAS_CALLBACK_FOCUS_OUT callback will also be called.
 *
 * @see evas_object_ref()
 * @see evas_object_unref()
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_del(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Retrieves the position and (rectangular) size of the given Evas
 * object.
 *
 * @param obj The given Evas object.
 * @param x Pointer to an integer in which to store the X coordinate
 *          of the object.
 * @param y Pointer to an integer in which to store the Y coordinate
 *          of the object.
 * @param w Pointer to an integer in which to store the width of the
 *          object.
 * @param h Pointer to an integer in which to store the height of the
 *          object.
 *
 * The position, naturally, will be relative to the top left corner of
 * the canvas' viewport.
 *
 * @note Use @c NULL pointers on the geometry components you're not
 * interested in: they'll be ignored by the function.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip int w, h, cw, ch;
 * @until return
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_geometry_get(const Evas_Object *obj, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Set the position and (rectangular) size of the given Evas object.
 *
 * @param obj The given Evas object.
 * @param x   X position to move the object to, in canvas units.
 * @param y   Y position to move the object to, in canvas units.
 * @param w   The new width of the Evas object.
 * @param h   The new height of the Evas object.
 *
 * The position, naturally, will be relative to the top left corner of
 * the canvas' viewport.
 *
 * If the object get moved, the object's ::EVAS_CALLBACK_MOVE callback
 * will be called.
 *
 * If the object get resized, the object's ::EVAS_CALLBACK_RESIZE callback
 * will be called.
 *
 * @see evas_object_move()
 * @see evas_object_resize()
 * @see evas_object_geometry_get
 *
 * @since 1.8
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_geometry_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);


/**
 * Makes the given Evas object visible.
 *
 * @param obj The given Evas object.
 *
 * Besides becoming visible, the object's ::EVAS_CALLBACK_SHOW
 * callback will be called.
 *
 * @see evas_object_hide() for more on object visibility.
 * @see evas_object_visible_get()
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_show(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Makes the given Evas object invisible.
 *
 * @param obj The given Evas object.
 *
 * Hidden objects, besides not being shown at all in your canvas,
 * won't be checked for changes on the canvas rendering
 * process. Furthermore, they will not catch input events. Thus, they
 * are much ligher (in processing needs) than an object that is
 * invisible due to indirect causes, such as being clipped or out of
 * the canvas' viewport.
 *
 * Besides becoming hidden, @p obj object's ::EVAS_CALLBACK_SHOW
 * callback will be called.
 *
 * @note All objects are created in the hidden state! If you want them
 * shown, use evas_object_show() after their creation.
 *
 * @see evas_object_show()
 * @see evas_object_visible_get()
 *
 * Example:
 * @dontinclude evas-object-manipulation.c
 * @skip if (evas_object_visible_get(d.clipper))
 * @until return
 *
 * See the full @ref Example_Evas_Object_Manipulation "example".
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_hide(Evas_Object *obj) EINA_ARG_NONNULL(1);


#include "canvas/evas_common_interface.eo.legacy.h"
#include "canvas/evas_object.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Events
 *
 * @{
 */

/**
 * Add (register) a callback function to a given Evas object event.
 *
 * @param obj Object to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param func The function to be called when the event is triggered
 * @param data The data pointer to be passed to @p func
 *
 * This function adds a function callback to an object when the event
 * of type @p type occurs on object @p obj. The function is @p func.
 *
 * In the event of a memory allocation error during addition of the
 * callback to the object, evas_alloc_error() should be used to
 * determine the nature of the error, if any, and the program should
 * sensibly try and recover.
 *
 * A callback function must have the ::Evas_Object_Event_Cb prototype
 * definition. The first parameter (@p data) in this definition will
 * have the same value passed to evas_object_event_callback_add() as
 * the @p data parameter, at runtime. The second parameter @p e is the
 * canvas pointer on which the event occurred. The third parameter is
 * a pointer to the object on which event occurred. Finally, the
 * fourth parameter @p event_info is a pointer to a data structure
 * that may or may not be passed to the callback, depending on the
 * event type that triggered the callback. This is so because some
 * events don't carry extra context with them, but others do.
 *
 * The event type @p type to trigger the function may be one of
 * #EVAS_CALLBACK_MOUSE_IN, #EVAS_CALLBACK_MOUSE_OUT,
 * #EVAS_CALLBACK_MOUSE_DOWN, #EVAS_CALLBACK_MOUSE_UP,
 * #EVAS_CALLBACK_MOUSE_MOVE, #EVAS_CALLBACK_MOUSE_WHEEL,
 * #EVAS_CALLBACK_MULTI_DOWN, #EVAS_CALLBACK_MULTI_UP,
 * #EVAS_CALLBACK_AXIS_UPDATE,
 * #EVAS_CALLBACK_MULTI_MOVE, #EVAS_CALLBACK_FREE,
 * #EVAS_CALLBACK_KEY_DOWN, #EVAS_CALLBACK_KEY_UP,
 * #EVAS_CALLBACK_FOCUS_IN, #EVAS_CALLBACK_FOCUS_OUT,
 * #EVAS_CALLBACK_SHOW, #EVAS_CALLBACK_HIDE, #EVAS_CALLBACK_MOVE,
 * #EVAS_CALLBACK_RESIZE, #EVAS_CALLBACK_RESTACK, #EVAS_CALLBACK_DEL,
 * #EVAS_CALLBACK_HOLD, #EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 * #EVAS_CALLBACK_IMAGE_PRELOADED or #EVAS_CALLBACK_IMAGE_UNLOADED.
 *
 * This determines the kind of event that will trigger the callback.
 * What follows is a list explaining better the nature of each type of
 * event, along with their associated @p event_info pointers:
 *
 * - #EVAS_CALLBACK_MOUSE_IN: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_In struct\n\n
 *   This event is triggered when the mouse pointer enters the area
 *   (not shaded by other objects) of the object @p obj. This may
 *   occur by the mouse pointer being moved by
 *   evas_event_feed_mouse_move() calls, or by the object being shown,
 *   raised, moved, resized, or other objects being moved out of the
 *   way, hidden or lowered, whatever may cause the mouse pointer to
 *   get on top of @p obj, having been on top of another object
 *   previously.
 *
 * - #EVAS_CALLBACK_MOUSE_OUT: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Out struct\n\n
 *   This event is triggered exactly like #EVAS_CALLBACK_MOUSE_IN is,
 *   but it occurs when the mouse pointer exits an object's area. Note
 *   that no mouse out events will be reported if the mouse pointer is
 *   implicitly grabbed to an object (mouse buttons are down, having
 *   been pressed while the pointer was over that object). In these
 *   cases, mouse out events will be reported once all buttons are
 *   released, if the mouse pointer has left the object's area. The
 *   indirect ways of taking off the mouse pointer from an object,
 *   like cited above, for #EVAS_CALLBACK_MOUSE_IN, also apply here,
 *   naturally.
 *
 * - #EVAS_CALLBACK_MOUSE_DOWN: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Down struct\n\n
 *   This event is triggered by a mouse button being pressed while the
 *   mouse pointer is over an object. If the pointer mode for Evas is
 *   #EVAS_OBJECT_POINTER_MODE_AUTOGRAB (default), this causes this
 *   object to <b>passively grab the mouse</b> until all mouse buttons
 *   have been released: all future mouse events will be reported to
 *   only this object until no buttons are down. That includes mouse
 *   move events, mouse in and mouse out events, and further button
 *   presses. When all buttons are released, event propagation will
 *   occur as normal (see #Evas_Object_Pointer_Mode).
 *
 * - #EVAS_CALLBACK_MOUSE_UP: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Up struct\n\n
 *   This event is triggered by a mouse button being released while
 *   the mouse pointer is over an object's area (or when passively
 *   grabbed to an object).
 *
 * - #EVAS_CALLBACK_MOUSE_MOVE: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Move struct\n\n
 *   This event is triggered by the mouse pointer being moved while
 *   over an object's area (or while passively grabbed to an object).
 *
 * - #EVAS_CALLBACK_MOUSE_WHEEL: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Wheel struct\n\n
 *   This event is triggered by the mouse wheel being rolled while the
 *   mouse pointer is over an object (or passively grabbed to an
 *   object).
 *
 * - #EVAS_CALLBACK_MULTI_DOWN: @p event_info is a pointer to an
 *   #Evas_Event_Multi_Down struct
 *
 * - #EVAS_CALLBACK_MULTI_UP: @p event_info is a pointer to an
 *   #Evas_Event_Multi_Up struct
 *
 * - #EVAS_CALLBACK_MULTI_MOVE: @p event_info is a pointer to an
 *   #Evas_Event_Multi_Move struct
 *
 * - #EVAS_CALLBACK_AXIS_UPDATE: @p event_info is a pointer to an
 *   #Evas_Event_Axis_Update struct
 *
 * - #EVAS_CALLBACK_FREE: @p event_info is @c NULL \n\n
 *   This event is triggered just before Evas is about to free all
 *   memory used by an object and remove all references to it. This is
 *   useful for programs to use if they attached data to an object and
 *   want to free it when the object is deleted. The object is still
 *   valid when this callback is called, but after it returns, there
 *   is no guarantee on the object's validity.
 *
 * - #EVAS_CALLBACK_KEY_DOWN: @p event_info is a pointer to an
 *   #Evas_Event_Key_Down struct\n\n
 *   This callback is called when a key is pressed and the focus is on
 *   the object, or a key has been grabbed to a particular object
 *   which wants to intercept the key press regardless of what object
 *   has the focus.
 *
 * - #EVAS_CALLBACK_KEY_UP: @p event_info is a pointer to an
 *   #Evas_Event_Key_Up struct \n\n
 *   This callback is called when a key is released and the focus is
 *   on the object, or a key has been grabbed to a particular object
 *   which wants to intercept the key release regardless of what
 *   object has the focus.
 *
 * - #EVAS_CALLBACK_FOCUS_IN: @p event_info is @c NULL \n\n
 *   This event is called when an object gains the focus. When it is
 *   called the object has already gained the focus.
 *
 * - #EVAS_CALLBACK_FOCUS_OUT: @p event_info is @c NULL \n\n
 *   This event is triggered when an object loses the focus. When it
 *   is called the object has already lost the focus.
 *
 * - #EVAS_CALLBACK_SHOW: @p event_info is @c NULL \n\n
 *   This event is triggered by the object being shown by
 *   evas_object_show().
 *
 * - #EVAS_CALLBACK_HIDE: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being hidden by
 *   evas_object_hide().
 *
 * - #EVAS_CALLBACK_MOVE: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being
 *   moved. evas_object_move() can trigger this, as can any
 *   object-specific manipulations that would mean the object's origin
 *   could move.
 *
 * - #EVAS_CALLBACK_RESIZE: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being resized. Resizes can
 *   be triggered by evas_object_resize() or by any object-specific
 *   calls that may cause the object to resize.
 *
 * - #EVAS_CALLBACK_RESTACK: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being re-stacked. Stacking
 *   changes can be triggered by
 *   evas_object_stack_below()/evas_object_stack_above() and others.
 *
 * - #EVAS_CALLBACK_DEL: @p event_info is @c NULL.
 *
 * - #EVAS_CALLBACK_HOLD: @p event_info is a pointer to an
 *   #Evas_Event_Hold struct
 *
 * - #EVAS_CALLBACK_CHANGED_SIZE_HINTS: @p event_info is @c NULL.
 *
 * - #EVAS_CALLBACK_IMAGE_PRELOADED: @p event_info is @c NULL.
 *
 * - #EVAS_CALLBACK_IMAGE_UNLOADED: @p event_info is @c NULL.
 *
 * @note Be careful not to add the same callback multiple times, if
 * that's not what you want, because Evas won't check if a callback
 * existed before exactly as the one being registered (and thus, call
 * it more than once on the event, in this case). This would make
 * sense if you passed different functions and/or callback data, only.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_object_event_callback_add(
 * @until }
 *
 * See the full example @ref Example_Evas_Events "here".
 *
 */
EAPI void      evas_object_event_callback_add(Evas_Object *obj, Evas_Callback_Type type, Evas_Object_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * Add (register) a callback function to a given Evas object event with a
 * non-default priority set. Except for the priority field, it's exactly the
 * same as @ref evas_object_event_callback_add
 *
 * @param obj Object to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param priority The priority of the callback, lower values called first.
 * @param func The function to be called when the event is triggered
 * @param data The data pointer to be passed to @p func
 *
 * @see evas_object_event_callback_add
 * @since 1.1
 */
EAPI void      evas_object_event_callback_priority_add(Evas_Object *obj, Evas_Callback_Type type, Evas_Callback_Priority priority, Evas_Object_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 4);

/**
 * Delete a callback function from an object
 *
 * @param obj Object to remove a callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was triggered
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes the most recently added callback from the
 * object @p obj which was triggered by the event type @p type and was
 * calling the function @p func when triggered. If the removal is
 * successful it will also return the data pointer that was passed to
 * evas_object_event_callback_add() when the callback was added to the
 * object. If not successful @c NULL will be returned.
 *
 * Example:
 * @code
 * extern Evas_Object *object;
 * void *my_data;
 * void up_callback(void *data, Evas *e, Evas_Object *obj, void *event_info);
 *
 * my_data = evas_object_event_callback_del(object, EVAS_CALLBACK_MOUSE_UP, up_callback);
 * @endcode
 */
EAPI void     *evas_object_event_callback_del(Evas_Object *obj, Evas_Callback_Type type, Evas_Object_Event_Cb func) EINA_ARG_NONNULL(1, 3);

/**
 * Delete (unregister) a callback function registered to a given
 * Evas object event.
 *
 * @param obj Object to remove a callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was
 * triggered
 * @param data The data pointer that was to be passed to the callback
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes the most recently added callback from the
 * object @p obj, which was triggered by the event type @p type and was
 * calling the function @p func with data @p data, when triggered. If
 * the removal is successful it will also return the data pointer that
 * was passed to evas_object_event_callback_add() (that will be the
 * same as the parameter) when the callback was added to the
 * object. In errors, @c NULL will be returned.
 *
 * @note For deletion of Evas object events callbacks filtering by
 * just type and function pointer, user
 * evas_object_event_callback_del().
 *
 * Example:
 * @code
 * extern Evas_Object *object;
 * void *my_data;
 * void up_callback(void *data, Evas *e, Evas_Object *obj, void *event_info);
 *
 * my_data = evas_object_event_callback_del_full(object, EVAS_CALLBACK_MOUSE_UP, up_callback, data);
 * @endcode
 */
EAPI void     *evas_object_event_callback_del_full(Evas_Object *obj, Evas_Callback_Type type, Evas_Object_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Extras
 *
 * @{
 */

/**
 * Set an attached data pointer to an object with a given string key.
 *
 * @param obj The object to attach the data pointer to
 * @param key The string key for the data to access it
 * @param data The pointer to the data to be attached
 *
 * This attaches the pointer @p data to the object @p obj, given the
 * access string @p key. This pointer will stay "hooked" to the object
 * until a new pointer with the same string key is attached with
 * evas_object_data_set() or it is deleted with
 * evas_object_data_del(). On deletion of the object @p obj, the
 * pointers will not be accessible from the object anymore.
 *
 * You can find the pointer attached under a string key using
 * evas_object_data_get(). It is the job of the calling application to
 * free any data pointed to by @p data when it is no longer required.
 *
 * If @p data is @c NULL, the old value stored at @p key will be
 * removed but no new value will be stored. This is synonymous with
 * calling evas_object_data_del() with @p obj and @p key.
 *
 * @note This function is very handy when you have data associated
 * specifically to an Evas object, being of use only when dealing with
 * it. Than you don't have the burden to a pointer to it elsewhere,
 * using this family of functions.
 *
 * Example:
 *
 * @code
 * int *my_data;
 * extern Evas_Object *obj;
 *
 * my_data = malloc(500);
 * evas_object_data_set(obj, "name_of_data", my_data);
 * printf("The data that was attached was %p\n", evas_object_data_get(obj, "name_of_data"));
 * @endcode
 */
EAPI void                     evas_object_data_set(Evas_Object *obj, const char *key, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Return an attached data pointer on an Evas object by its given
 * string key.
 *
 * @param obj The object to which the data was attached
 * @param key The string key the data was stored under
 * @return The data pointer stored, or @c NULL if none was stored
 *
 * This function will return the data pointer attached to the object
 * @p obj, stored using the string key @p key. If the object is valid
 * and a data pointer was stored under the given key, that pointer
 * will be returned. If this is not the case, @c NULL will be
 * returned, signifying an invalid object or a non-existent key. It is
 * possible that a @c NULL pointer was stored given that key, but this
 * situation is non-sensical and thus can be considered an error as
 * well. @c NULL pointers are never stored as this is the return value
 * if an error occurs.
 *
 * Example:
 *
 * @code
 * int *my_data;
 * extern Evas_Object *obj;
 *
 * my_data = evas_object_data_get(obj, "name_of_my_data");
 * if (my_data) printf("Data stored was %p\n", my_data);
 * else printf("No data was stored on the object\n");
 * @endcode
 */
EAPI void                    *evas_object_data_get(const Evas_Object *obj, const char *key) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2);

/**
 * Delete an attached data pointer from an object.
 *
 * @param obj The object to delete the data pointer from
 * @param key The string key the data was stored under
 * @return The original data pointer stored at @p key on @p obj
 *
 * This will remove the stored data pointer from @p obj stored under
 * @p key and return this same pointer, if actually there was data
 * there, or @c NULL, if nothing was stored under that key.
 *
 * Example:
 *
 * @code
 * int *my_data;
 * extern Evas_Object *obj;
 *
 * my_data = evas_object_data_del(obj, "name_of_my_data");
 * @endcode
 */
EAPI void                    *evas_object_data_del(Evas_Object *obj, const char *key) EINA_ARG_NONNULL(1, 2);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Find
 *
 * @{
 */

/**
 * Retrieve the Evas object stacked at the top at the position of the
 * mouse cursor, over a given canvas
 *
 * @param   e A handle to the canvas.
 * @return  The Evas object that is over all other objects at the mouse
 * pointer's position
 *
 * This function will traverse all the layers of the given canvas,
 * from top to bottom, querying for objects with areas covering the
 * mouse pointer's position, over @p e.
 *
 * @warning This function will @b skip objects parented by smart
 * objects, acting only on the ones at the "top level", with regard to
 * object parenting.
 */
EAPI Evas_Object *evas_object_top_at_pointer_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Interceptors
 *
 * @{
 */

/**
 * Set the callback function that intercepts a show event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a show event
 * of a canvas object.
 *
 * @see evas_object_intercept_show_callback_del().
 *
 */
EAPI void  evas_object_intercept_show_callback_add(Evas_Object *obj, Evas_Object_Intercept_Show_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a show event of a object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a show event
 * of a canvas object.
 *
 * @see evas_object_intercept_show_callback_add().
 *
 */
EAPI void *evas_object_intercept_show_callback_del(Evas_Object *obj, Evas_Object_Intercept_Show_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a hide event of a object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a hide event
 * of a canvas object.
 *
 * @see evas_object_intercept_hide_callback_del().
 *
 */
EAPI void  evas_object_intercept_hide_callback_add(Evas_Object *obj, Evas_Object_Intercept_Hide_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a hide event of a object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a hide event
 * of a canvas object.
 *
 * @see evas_object_intercept_hide_callback_add().
 *
 */
EAPI void *evas_object_intercept_hide_callback_del(Evas_Object *obj, Evas_Object_Intercept_Hide_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a move event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a move event
 * of a canvas object.
 *
 * @see evas_object_intercept_move_callback_del().
 *
 */
EAPI void  evas_object_intercept_move_callback_add(Evas_Object *obj, Evas_Object_Intercept_Move_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a move event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a move event
 * of a canvas object.
 *
 * @see evas_object_intercept_move_callback_add().
 *
 */
EAPI void *evas_object_intercept_move_callback_del(Evas_Object *obj, Evas_Object_Intercept_Move_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a resize event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a resize event
 * of a canvas object.
 *
 * @see evas_object_intercept_resize_callback_del().
 *
 */
EAPI void  evas_object_intercept_resize_callback_add(Evas_Object *obj, Evas_Object_Intercept_Resize_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a resize event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a resize event
 * of a canvas object.
 *
 * @see evas_object_intercept_resize_callback_add().
 *
 */
EAPI void *evas_object_intercept_resize_callback_del(Evas_Object *obj, Evas_Object_Intercept_Resize_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a raise event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a raise event
 * of a canvas object.
 *
 * @see evas_object_intercept_raise_callback_del().
 *
 */
EAPI void  evas_object_intercept_raise_callback_add(Evas_Object *obj, Evas_Object_Intercept_Raise_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a raise event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a raise event
 * of a canvas object.
 *
 * @see evas_object_intercept_raise_callback_add().
 *
 */
EAPI void *evas_object_intercept_raise_callback_del(Evas_Object *obj, Evas_Object_Intercept_Raise_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a lower event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a lower event
 * of a canvas object.
 *
 * @see evas_object_intercept_lower_callback_del().
 *
 */
EAPI void  evas_object_intercept_lower_callback_add(Evas_Object *obj, Evas_Object_Intercept_Lower_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a lower event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a lower event
 * of a canvas object.
 *
 * @see evas_object_intercept_lower_callback_add().
 *
 */
EAPI void *evas_object_intercept_lower_callback_del(Evas_Object *obj, Evas_Object_Intercept_Lower_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a stack above event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a stack above event
 * of a canvas object.
 *
 * @see evas_object_intercept_stack_above_callback_del().
 *
 */
EAPI void  evas_object_intercept_stack_above_callback_add(Evas_Object *obj, Evas_Object_Intercept_Stack_Above_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a stack above event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a stack above event
 * of a canvas object.
 *
 * @see evas_object_intercept_stack_above_callback_add().
 *
 */
EAPI void *evas_object_intercept_stack_above_callback_del(Evas_Object *obj, Evas_Object_Intercept_Stack_Above_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a stack below event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a stack below event
 * of a canvas object.
 *
 * @see evas_object_intercept_stack_below_callback_del().
 *
 */
EAPI void  evas_object_intercept_stack_below_callback_add(Evas_Object *obj, Evas_Object_Intercept_Stack_Below_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a stack below event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a stack below event
 * of a canvas object.
 *
 * @see evas_object_intercept_stack_below_callback_add().
 *
 */
EAPI void *evas_object_intercept_stack_below_callback_del(Evas_Object *obj, Evas_Object_Intercept_Stack_Below_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a layer set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a layer set event
 * of a canvas object.
 *
 * @see evas_object_intercept_layer_set_callback_del().
 *
 */
EAPI void  evas_object_intercept_layer_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Layer_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a layer set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a layer set event
 * of a canvas object.
 *
 * @see evas_object_intercept_layer_set_callback_add().
 *
 */
EAPI void *evas_object_intercept_layer_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Layer_Set_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a color set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a color set event
 * of a canvas object.
 *
 * @see evas_object_intercept_color_set_callback_del().
 *
 */
EAPI void  evas_object_intercept_color_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Color_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a color set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a color set event
 * of a canvas object.
 *
 * @see evas_object_intercept_color_set_callback_add().
 *
 */
EAPI void *evas_object_intercept_color_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Color_Set_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a clip set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a clip set event
 * of a canvas object.
 *
 * @see evas_object_intercept_clip_set_callback_del().
 *
 */
EAPI void  evas_object_intercept_clip_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Clip_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a clip set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a clip set event
 * of a canvas object.
 *
 * @see evas_object_intercept_clip_set_callback_add().
 *
 */
EAPI void *evas_object_intercept_clip_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Clip_Set_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a clip unset event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a clip unset event
 * of a canvas object.
 *
 * @see evas_object_intercept_clip_unset_callback_del().
 *
 */
EAPI void  evas_object_intercept_clip_unset_callback_add(Evas_Object *obj, Evas_Object_Intercept_Clip_Unset_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a clip unset event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a clip unset event
 * of a canvas object.
 *
 * @see evas_object_intercept_clip_unset_callback_add().
 *
 */
EAPI void *evas_object_intercept_clip_unset_callback_del(Evas_Object *obj, Evas_Object_Intercept_Clip_Unset_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a focus set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a focus set event
 * of a canvas object.
 *
 * @see evas_object_intercept_focus_set_callback_del().
 *
 */
EAPI void  evas_object_intercept_focus_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Focus_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a focus set event of an object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a focus set event
 * of a canvas object.
 *
 * @see evas_object_intercept_focus_set_callback_add().
 *
 */
EAPI void *evas_object_intercept_focus_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Focus_Set_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Rectangle
 *
 * @{
 */

/**
 * Adds a rectangle to the given evas.
 * @param   e The given evas.
 * @return  The new rectangle object.
 *
 * @ingroup Evas_Object_Rectangle
 */
EAPI Evas_Object *evas_object_rectangle_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

#include "canvas/evas_rectangle.eo.legacy.h"
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Image
 *
 * @{
 */
/**
 * Creates a new image object on the given Evas @p e canvas.
 *
 * @param e The given canvas.
 * @return The created image object handle.
 *
 * @note If you intend to @b display an image somehow in a GUI,
 * besides binding it to a real image file/source (with
 * evas_object_image_file_set(), for example), you'll have to tell
 * this image object how to fill its space with the pixels it can get
 * from the source. See evas_object_image_filled_add(), for a helper
 * on the common case of scaling up an image source to the whole area
 * of the image object.
 *
 * @see evas_object_image_fill_set()
 *
 * Example:
 * @code
 * img = evas_object_image_add(canvas);
 * evas_object_image_file_set(img, "/path/to/img", NULL);
 * @endcode
 */
EAPI Evas_Object                  *evas_object_image_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Creates a new image object that @b automatically scales its bound
 * image to the object's area, on both axis.
 *
 * @param e The given canvas.
 * @return The created image object handle.
 *
 * This is a helper function around evas_object_image_add() and
 * evas_object_image_filled_set(). It has the same effect of applying
 * those functions in sequence, which is a very common use case.
 *
 * @note Whenever this object gets resized, the bound image will be
 * rescaled, too.
 *
 * @see evas_object_image_add()
 * @see evas_object_image_filled_set()
 * @see evas_object_image_fill_set()
 */
EAPI Evas_Object                  *evas_object_image_filled_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Sets the data for an image from memory to be loaded
 *
 * This is the same as evas_object_image_file_set() but the file to be loaded
 * may exist at an address in memory (the data for the file, not the filename
 * itself). The @p data at the address is copied and stored for future use, so
 * no @p data needs to be kept after this call is made. It will be managed and
 * freed for you when no longer needed. The @p size is limited to 2 gigabytes
 * in size, and must be greater than 0. A @c NULL @p data pointer is also
 * invalid. Set the filename to @c NULL to reset to empty state and have the
 * image file data freed from memory using evas_object_image_file_set().
 *
 * The @p format is optional (pass @c NULL if you don't need/use it). It is
 * used to help Evas guess better which loader to use for the data. It may
 * simply be the "extension" of the file as it would normally be on disk
 * such as "jpg" or "png" or "gif" etc.
 *
 * @param obj The given image object.
 * @param data The image file data address
 * @param size The size of the image file data in bytes
 * @param format The format of the file (optional), or @c NULL if not needed
 * @param key The image key in file, or @c NULL.
 */
EAPI void                          evas_object_image_memfile_set(Evas_Object *obj, void *data, int size, char *format, char *key) EINA_ARG_NONNULL(1, 2);

/**
 * Set the native surface of a given image of the canvas
 *
 * @param obj The given canvas pointer.
 * @param surf The new native surface.
 *
 * This function sets a native surface of a given canvas image.
 *
 */
EAPI void                          evas_object_image_native_surface_set(Evas_Object *obj, Evas_Native_Surface *surf) EINA_ARG_NONNULL(1, 2);

/**
 * Preload an image object's image data in the background
 *
 * @param obj The given image object.
 * @param cancel @c EINA_FALSE will add it the preloading work queue,
 *               @c EINA_TRUE will remove it (if it was issued before).
 *
 * This function requests the preload of the data image in the
 * background. The work is queued before being processed (because
 * there might be other pending requests of this type).
 *
 * Whenever the image data gets loaded, Evas will call
 * #EVAS_CALLBACK_IMAGE_PRELOADED registered callbacks on @p obj (what
 * may be immediately, if the data was already preloaded before).
 *
 * Use @c EINA_TRUE for @p cancel on scenarios where you don't need
 * the image data preloaded anymore.
 *
 * @note Any evas_object_show() call after evas_object_image_preload()
 * will make the latter to be @b cancelled, with the loading process
 * now taking place @b synchronously (and, thus, blocking the return
 * of the former until the image is loaded). It is highly advisable,
 * then, that the user preload an image with it being @b hidden, just
 * to be shown on the #EVAS_CALLBACK_IMAGE_PRELOADED event's callback.
 */
EAPI void                          evas_object_image_preload(Evas_Object *obj, Eina_Bool cancel) EINA_ARG_NONNULL(1);

/**
 * Clear the source object on a proxy image object.
 *
 * @param obj Image object to clear source of.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on error.
 *
 * This is equivalent to calling evas_object_image_source_set() with a
 * @c NULL source.
 */
EAPI Eina_Bool                     evas_object_image_source_unset(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Enable an image to be used as an alpha mask.
 *
 * This will set any flags, and discard any excess image data not used as an
 * alpha mask.
 *
 * Note there is little point in using a image as alpha mask unless it has an
 * alpha channel.
 *
 * @param obj Object to use as an alpha mask.
 * @param ismask Use image as alphamask, must be true.
 */
EAPI void                          evas_object_image_alpha_mask_set(Evas_Object *obj, Eina_Bool ismask) EINA_ARG_NONNULL(1);

/**
 *
 * Set the source file from where an image object must fetch the real
 * image data (it may be an Eet file, besides pure image ones).
 *
 * If the file supports multiple data stored in it (as Eet files do),
 * you can specify the key to be used as the index of the image in
 * this file.
 *
 * Example:
 * @code
 * img = evas_object_image_add(canvas);
 * evas_object_image_file_set(img, "/path/to/img", NULL);
 * err = evas_object_image_load_error_get(img);
 * if (err != EVAS_LOAD_ERROR_NONE)
 * {
 * fprintf(stderr, "could not load image '%s'. error string is \"%s\"\n",
 * valid_path, evas_load_error_str(err));
 * }
 * else
 * {
 * evas_object_image_fill_set(img, 0, 0, w, h);
 * evas_object_resize(img, w, h);
 * evas_object_show(img);
 * }
 * @endcode
 *
 * @param[in] file The image file path.
 * @param[in] key The image key in @p file (if its an Eet one), or @c
NULL, otherwise.
 */
EAPI void evas_object_image_file_set(Eo *obj, const char *file, const char *key);

/**
 *
 * Retrieve the source file from where an image object is to fetch the
 * real image data (it may be an Eet file, besides pure image ones).
 *
 * You must @b not modify the strings on the returned pointers.
 *
 * @note Use @c NULL pointers on the file components you're not
 * interested in: they'll be ignored by the function.
 *
 * @param[out] file The image file path.
 * @param[out] key The image key in @p file (if its an Eet one), or @c
NULL, otherwise.
 */
EAPI void evas_object_image_file_get(const Eo *obj, const char **file, const char **key);

/**
 *
 * Save the given image object's contents to an (image) file.
 *
 * The extension suffix on @p file will determine which <b>saver
 * module</b> Evas is to use when saving, thus the final file's
 * format. If the file supports multiple data stored in it (Eet ones),
 * you can specify the key to be used as the index of the image in it.
 *
 * You can specify some flags when saving the image.  Currently
 * acceptable flags are @c quality and @c compress. Eg.: @c
 * "quality=100 compress=9"
 *
 * @param[in] file The filename to be used to save the image (extension
obligatory).
 * @param[in] key The image key in the file (if an Eet one), or @c NULL,
otherwise.
 * @param[in] flags String containing the flags to be used (@c NULL for
none).
 */
EAPI Eina_Bool evas_object_image_save(const Eo *obj, const char *file, const char *key, const char *flags) EINA_ARG_NONNULL(2);

/**
 *
 * Check if an image object can be animated (have multiple frames)
 *
 * @return whether obj support animation
 *
 * This returns if the image file of an image object is capable of animation
 * such as an animated gif file might. This is only useful to be called once
 * the image object file has been set.
 *
 * Example:
 * @code
 * extern Evas_Object *obj;
 *
 * if (evas_object_image_animated_get(obj))
 * {
 * int frame_count;
 * int loop_count;
 * Evas_Image_Animated_Loop_Hint loop_type;
 * double duration;
 *
 * frame_count = evas_object_image_animated_frame_count_get(obj);
 * printf("This image has %d frames\n",frame_count);
 *
 * duration = evas_object_image_animated_frame_duration_get(obj,1,0);
 * printf("Frame 1's duration is %f. You had better set object's frame to 2 after this duration using timer\n");
 *
 * loop_count = evas_object_image_animated_loop_count_get(obj);
 * printf("loop count is %d. You had better run loop %d times\n",loop_count,loop_count);
 *
 * loop_type = evas_object_image_animated_loop_type_get(obj);
 * if (loop_type == EVAS_IMAGE_ANIMATED_HINT_LOOP)
 * printf("You had better set frame like 1->2->3->1->2->3...\n");
 * else if (loop_type == EVAS_IMAGE_ANIMATED_HINT_PINGPONG)
 * printf("You had better set frame like 1->2->3->2->1->2...\n");
 * else
 * printf("Unknown loop type\n");
 *
 * evas_object_image_animated_frame_set(obj,1);
 * printf("You set image object's frame to 1. You can see frame 1\n");
 * }
 * @endcode
 *
 * @see evas_object_image_animated_get()
 * @see evas_object_image_animated_frame_count_get()
 * @see evas_object_image_animated_loop_type_get()
 * @see evas_object_image_animated_loop_count_get()
 * @see evas_object_image_animated_frame_duration_get()
 * @see evas_object_image_animated_frame_set()
 * @since 1.1
 *
 */
EAPI Eina_Bool evas_object_image_animated_get(const Eo *obj);

/**
 *
 * Set the load size of a given image object's source image.
 *
 * This function sets a new geometry size for the given canvas image.
 * The image will be loaded into memory as if it was the set size instead of
 * the original size.
 *
 * @note The size of a given image object's source image will be less than or
 * equal to the size of @p w and @p h.
 *
 * @see evas_object_image_load_size_get()
 *
 * @param[in] w The new width of the image's load size.
 * @param[in] h The new height of the image's load size.
 */
EAPI void evas_object_image_load_size_set(Eo *obj, int w, int h);

/**
 *
 * Get the load size of a given image object's source image.
 *
 * This function gets the geometry size set manually for the given canvas image.
 *
 * @note Use @c NULL pointers on the size components you're not
 * interested in: they'll be ignored by the function.
 * @note @p w and @p h will be set with the image's loading size only if
 * the image's load size is set manually: if evas_object_image_load_size_set()
 * has not been called, @p w and @p h will be set with 0.
 *
 * @see evas_object_image_load_size_set() for more details
 *
 * @param[out] w The new width of the image's load size.
 * @param[out] h The new height of the image's load size.
 */
EAPI void evas_object_image_load_size_get(const Eo *obj, int *w, int *h);

/**
 *
 * Sets whether to use high-quality image scaling algorithm on the
 * given image object.
 *
 * When enabled, a higher quality image scaling algorithm is used when
 * scaling images to sizes other than the source image's original
 * one. This gives better results but is more computationally
 * expensive.
 *
 * @note Image objects get created originally with smooth scaling @b
 * on.
 *
 * @see evas_object_image_smooth_scale_get()
 *
 * @param[in] smooth_scale Whether to use smooth scale or not.
 */
EAPI void evas_object_image_smooth_scale_set(Eo *obj, Eina_Bool smooth_scale);

/**
 *
 * Retrieves whether the given image object is using high-quality
 * image scaling algorithm.
 *
 * @return Whether smooth scale is being used.
 *
 * See @ref evas_object_image_smooth_scale_set() for more details.
 *
 */
EAPI Eina_Bool evas_object_image_smooth_scale_get(const Eo *obj);

#include "canvas/evas_image.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Text
 *
 * @{
 */

/**
 * Creates a new text object on the provided canvas.
 *
 * @param e The canvas to create the text object on.
 * @return @c NULL on error, a pointer to a new text object on
 * success.
 *
 * Text objects are for simple, single line text elements. If you want
 * more elaborated text blocks, see @ref Evas_Object_Textblock.
 *
 * @see evas_object_text_font_source_set()
 * @see evas_object_text_font_set()
 * @see evas_object_text_text_set()
 */
EAPI Evas_Object         *evas_object_text_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 *
 * Sets the text string to be displayed by the given text object.
 *
 * @see evas_object_text_text_get()
 *
 * @param[in] text Text string to display on it.
 */
EAPI void evas_object_text_text_set(Eo *obj, const char *text);

/**
 *
 * Retrieves the text string currently being displayed by the given
 * text object.
 *
 * @return The text string currently being displayed on it.
 *
 * @note Do not free() the return value.
 *
 * @see evas_object_text_text_set()
 *
 */
EAPI const char *evas_object_text_text_get(const Eo *obj);

#include "canvas/evas_text.eo.legacy.h"

/**
 *
 * Set the font (source) file to be used on a given text object.
 *
 * This function allows the font file to be explicitly set for a given
 * text object, overriding system lookup, which will first occur in
 * the given file's contents.
 *
 * @see evas_object_text_font_get()
 *
 * @param[in] font_source The font file's path.
 */
EAPI void evas_object_text_font_source_set(Eo *obj, const char *font_source);

/**
 *
 * Get the font file's path which is being used on a given text
 * object.
 *
 * @return The font file's path.
 *
 * @see evas_object_text_font_get() for more details
 *
 */
EAPI const char *evas_object_text_font_source_get(const Eo *obj);

/**
 *
 * Set the font family or filename, and size on a given text object.
 *
 * This function allows the font name and size of a text object to be
 * set. The @p font string has to follow fontconfig's convention on
 * naming fonts, as it's the underlying library used to query system
 * fonts by Evas (see the @c fc-list command's output, on your system,
 * to get an idea). Alternatively, one can use a full path to a font file.
 *
 * @see evas_object_text_font_get()
 * @see evas_object_text_font_source_set()
 *
 * @param[in] font The font family name or filename.
 * @param[in] size The font size, in points.
 */
EAPI void evas_object_text_font_set(Eo *obj, const char *font, Evas_Font_Size size);

/**
 *
 * Retrieve the font family and size in use on a given text object.
 *
 * This function allows the font name and size of a text object to be
 * queried. Be aware that the font name string is still owned by Evas
 * and should @b not have free() called on it by the caller of the
 * function.
 *
 * @see evas_object_text_font_set()
 *
 * @param[out] font The font family name or filename.
 * @param[out] size The font size, in points.
 */
EAPI void evas_object_text_font_get(const Eo *obj, const char **font, Evas_Font_Size *size);


/**
 * @}
 */

/**
 * @ingroup Evas_Object_Textblock
 *
 * @{
 */

/**
 * Adds a textblock to the given evas.
 * @param   e The given evas.
 * @return  The new textblock object.
 */
EAPI Evas_Object                             *evas_object_textblock_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Return the plain version of the markup.
 *
 * Works as if you set the markup to a textblock and then retrieve the plain
 * version of the text. i.e: <br> and <\n> will be replaced with \n, &...; with
 * the actual char and etc.
 *
 * @param obj The textblock object to work with. (if @c NULL, tries the
 * default).
 * @param text The markup text (if @c NULL, return @c NULL).
 * @return An allocated plain text version of the markup.
 * @since 1.2
 */
EAPI char                                    *evas_textblock_text_markup_to_utf8(const Evas_Object *obj, const char *text) EINA_WARN_UNUSED_RESULT EINA_MALLOC;

/**
 * Return the markup version of the plain text.
 *
 * Replaces \\n -\> \<br/\> \\t -\> \<tab/\> and etc. Generally needed before you pass
 * plain text to be set in a textblock.
 *
 * @param obj the textblock object to work with (if @c NULL, it just does the
 * default behaviour, i.e with no extra object information).
 * @param text The plain text (if @c NULL, return @c NULL).
 * @return An allocated markup version of the plain text.
 * @since 1.2
 */
EAPI char                                    *evas_textblock_text_utf8_to_markup(const Evas_Object *obj, const char *text) EINA_WARN_UNUSED_RESULT EINA_MALLOC;

/**
 * Clear the textblock object.
 * @note Does *NOT* free the Evas object itself.
 *
 * @param obj the object to clear.
 * @return nothing.
 */
EAPI void                                     evas_object_textblock_clear(Evas_Object *obj) EINA_ARG_NONNULL(1);

#include "canvas/evas_textblock.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Grid
 *
 * @{
 */
/**
 * @brief Add a textgrid to the given Evas.
 *
 * @param e The given evas.
 * @return The new textgrid object.
 *
 * This function adds a new textgrid object to the Evas @p e and returns the object.
 *
 * @since 1.7
 */
EAPI Evas_Object *evas_object_textgrid_add(Evas *e);

#include "canvas/evas_textgrid.eo.legacy.h"

/**
 *
 * @brief Set the font (source) file to be used on a given textgrid object.
 *
 * This function allows the font file @p font_source to be explicitly
 * set for the textgrid object @p obj, overriding system lookup, which
 * will first occur in the given file's contents. If @p font_source is
 * @c NULL or is an empty string, or the same font_source has already
 * been set, or on error, this function does nothing.
 *
 * @see evas_object_textgrid_font_get()
 * @see evas_object_textgrid_font_set()
 * @see evas_object_textgrid_font_source_get()
 *
 * @since 1.7
 *
 * @param[in] font_source The font file's path.
 */
EAPI void evas_object_textgrid_font_source_set(Eo *obj, const char *font_source);

/**
 *
 * @brief Get the font file's path which is being used on a given textgrid object.
 *
 * @return The font file's path.
 *
 * This function returns the font source path of the textgrid object
 * @p obj. If the font source path has not been set, or on error,
 * @c NULL is returned.
 *
 * @see evas_object_textgrid_font_get()
 * @see evas_object_textgrid_font_set()
 * @see evas_object_textgrid_font_source_set()
 *
 * @since 1.7
 *
 */
EAPI const char *evas_object_textgrid_font_source_get(const Eo *obj);

/**
 *
 * @brief Set the font family and size on a given textgrid object.
 *
 * This function allows the font name @p font_name and size
 * @p font_size of the textgrid object @p obj to be set. The @p font_name
 * string has to follow fontconfig's convention on naming fonts, as
 * it's the underlying library used to query system fonts by Evas (see
 * the @c fc-list command's output, on your system, to get an
 * idea). It also has to be a monospace font. If @p font_name is
 * @c NULL, or if it is an empty string, or if @p font_size is less or
 * equal than 0, or on error, this function does nothing.
 *
 * @see evas_object_textgrid_font_get()
 * @see evas_object_textgrid_font_source_set()
 * @see evas_object_textgrid_font_source_get()
 *
 * @since 1.7
 *
 * @param[in] font_name The font (family) name.
 * @param[in] font_size The font size, in points.
 */
EAPI void evas_object_textgrid_font_set(Eo *obj, const char *font_name, Evas_Font_Size font_size);

/**
 *
 * @brief Retrieve the font family and size in use on a given textgrid object.
 *
 * This function allows the font name and size of a textgrid object
 * @p obj to be queried and stored respectively in the buffers
 * @p font_name and @p font_size. Be aware that the font name string is
 * still owned by Evas and should @b not have free() called on it by
 * the caller of the function. On error, the font name is the empty
 * string and the font size is 0. @p font_name and @p font_source can
 * be @c NULL.
 *
 * @see evas_object_textgrid_font_set()
 * @see evas_object_textgrid_font_source_set()
 * @see evas_object_textgrid_font_source_get()
 *
 * @since 1.7
 *
 * @param[out] font_name The font (family) name.
 * @param[out] font_size The font size, in points.
 */
EAPI void evas_object_textgrid_font_get(const Eo *obj, const char **font_name, Evas_Font_Size *font_size);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Line
 *
 * @{
 */
/**
 * Adds a new evas line object to the given evas.
 * @param   e The given evas.
 * @return  The new evas line object.
 */
EAPI Evas_Object *evas_object_line_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

#include "canvas/evas_line.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Polygon
 *
 * @{
 */
/**
 * Adds a new evas polygon object to the given evas.
 * @param   e The given evas.
 * @return  A new evas polygon object.
 */
EAPI Evas_Object *evas_object_polygon_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

#include "canvas/evas_polygon.eo.legacy.h"
/**
 * @}
 */


/**
 * @}
 */


/**
 * @ingroup Evas_Smart_Object_Group
 *
 * @{
 */
/**
 * Instantiates a new smart object described by @p s.
 *
 * @param e the canvas on which to add the object
 * @param s the #Evas_Smart describing the smart object
 * @return a new #Evas_Object handle
 *
 * This is the function one should use when defining the public
 * function @b adding an instance of the new smart object to a given
 * canvas. It will take care of setting all of its internals to work
 * as they should, if the user set things properly, as seem on the
 * #EVAS_SMART_SUBCLASS_NEW, for example.
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Evas_Object *evas_object_smart_add(Evas *e, Evas_Smart *s) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2) EINA_MALLOC;

/**
 * Set an Evas object as a member of a given smart object.
 *
 * @param obj The member object
 * @param smart_obj The smart object
 *
 * Members will automatically be stacked and layered together with the
 * smart object. The various stacking functions will operate on
 * members relative to the other members instead of the entire canvas,
 * since they now live on an exclusive layer (see
 * evas_object_stack_above(), for more details).
 *
 * Any @p smart_obj object's specific implementation of the @c
 * member_add() smart function will take place too, naturally.
 *
 * @see evas_object_smart_member_del()
 * @see evas_object_smart_members_get()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_member_add(Evas_Object *obj, Evas_Object *smart_obj) EINA_ARG_NONNULL(1, 2);

/**
 * Removes a member object from a given smart object.
 *
 * @param obj the member object
 * @ingroup Evas_Smart_Object_Group
 *
 * This removes a member object from a smart object, if it was added
 * to any. The object will still be on the canvas, but no longer
 * associated with whichever smart object it was associated with.
 *
 * @see evas_object_smart_member_add() for more details
 * @see evas_object_smart_members_get()
 */
EAPI void         evas_object_smart_member_del(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Add (register) a callback function to the smart event specified by
 * @p event on the smart object @p obj.
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param func the callback function
 * @param data user data to be passed to the callback function
 *
 * Smart callbacks look very similar to Evas callbacks, but are
 * implemented as smart object's custom ones.
 *
 * This function adds a function callback to an smart object when the
 * event named @p event occurs in it. The function is @p func.
 *
 * In the event of a memory allocation error during addition of the
 * callback to the object, evas_alloc_error() should be used to
 * determine the nature of the error, if any, and the program should
 * sensibly try and recover.
 *
 * A smart callback function must have the ::Evas_Smart_Cb prototype
 * definition. The first parameter (@p data) in this definition will
 * have the same value passed to evas_object_smart_callback_add() as
 * the @p data parameter, at runtime. The second parameter @p obj is a
 * handle to the object on which the event occurred. The third
 * parameter, @p event_info, is a pointer to data which is totally
 * dependent on the smart object's implementation and semantic for the
 * given event.
 *
 * There is an infrastructure for introspection on smart objects'
 * events (see evas_smart_callbacks_descriptions_get()), but no
 * internal smart objects on Evas implement them yet.
 *
 * @see @ref Evas_Smart_Object_Group_Callbacks for more details.
 *
 * @see evas_object_smart_callback_del()
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_callback_add(Evas_Object *obj, const char *event, Evas_Smart_Cb func, const void *data) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Add (register) a callback function to the smart event specified by
 * @p event on the smart object @p obj. Except for the priority field,
 * it's exactly the same as @ref evas_object_smart_callback_add
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param priority The priority of the callback, lower values called first.
 * @param func the callback function
 * @param data user data to be passed to the callback function
 *
 * @see evas_object_smart_callback_add
 * @since 1.1
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_callback_priority_add(Evas_Object *obj, const char *event, Evas_Callback_Priority priority, Evas_Smart_Cb func, const void *data);

/**
 * Delete (unregister) a callback function from the smart event
 * specified by @p event on the smart object @p obj.
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param func the callback function
 * @return the data pointer
 *
 * This function removes <b>the first</b> added smart callback on the
 * object @p obj matching the event name @p event and the registered
 * function pointer @p func. If the removal is successful it will also
 * return the data pointer that was passed to
 * evas_object_smart_callback_add() (that will be the same as the
 * parameter) when the callback(s) was(were) added to the canvas. If
 * not successful @c NULL will be returned.
 *
 * @see evas_object_smart_callback_add() for more details.
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void        *evas_object_smart_callback_del(Evas_Object *obj, const char *event, Evas_Smart_Cb func) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Delete (unregister) a callback function from the smart event
 * specified by @p event on the smart object @p obj.
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param func the callback function
 * @param data the data pointer that was passed to the callback
 * @return the data pointer
 *
 * This function removes <b>the first</b> added smart callback on the
 * object @p obj matching the event name @p event, the registered
 * function pointer @p func and the callback data pointer @p data. If
 * the removal is successful it will also return the data pointer that
 * was passed to evas_object_smart_callback_add() (that will be the same
 * as the parameter) when the callback(s) was(were) added to the canvas.
 * If not successful @c NULL will be returned. A common use would be to
 * remove an exact match of a callback
 *
 * @see evas_object_smart_callback_add() for more details.
 * @since 1.2
 * @ingroup Evas_Smart_Object_Group
 *
 * @note To delete all smart event callbacks which match @p type and @p func,
 * use evas_object_smart_callback_del().
 */
EAPI void        *evas_object_smart_callback_del_full(Evas_Object *obj, const char *event, Evas_Smart_Cb func, const void *data) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Call a given smart callback on the smart object @p obj.
 *
 * @param obj the smart object
 * @param event the event's name string
 * @param event_info pointer to an event specific struct or information to
 * pass to the callback functions registered on this smart event
 *
 * This should be called @b internally, from the smart object's own
 * code, when some specific event has occurred and the implementor
 * wants is to pertain to the object's events API (see @ref
 * Evas_Smart_Object_Group_Callbacks). The documentation for the smart
 * object should include a list of possible events and what type of @p
 * event_info to expect for each of them. Also, when defining an
 * #Evas_Smart_Class, smart object implementors are strongly
 * encouraged to properly set the Evas_Smart_Class::callbacks
 * callbacks description array, so that the users of the smart object
 * can have introspection on its events API <b>at run time</b>.
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_callback_call(Evas_Object *obj, const char *event, void *event_info) EINA_ARG_NONNULL(1, 2);

/**
 * Retrieve an Evas smart object's interface, by name string pointer.
 *
 * @param obj An Evas smart object.
 * @param name Name string of the desired interface, which must be the
 *             same pointer used at the interface's declarion, when
 *             creating the smart object @a obj.
 *
 * @since 1.7
 *
 * @return The interface's handle pointer, if found, @c NULL
 * otherwise.
 */
EAPI const void       *evas_object_smart_interface_get(const Evas_Object *obj, const char *name);

/**
 * Retrieve an Evas smart object interface's <b>private data</b>.
 *
 * @param obj An Evas smart object.
 * @param iface The given object's interface handle.
 *
 * @since 1.7
 *
 * @return The object interface's private data blob pointer, if found,
 * @c NULL otherwise.
 */
EAPI void             *evas_object_smart_interface_data_get(const Evas_Object *obj, const Evas_Smart_Interface *iface);

/**
 * This gets the internal counter that counts the number of smart calculations
 *
 * @param e The canvas to get the calculate counter from
 *
 * Whenever evas performs smart object calculations on the whole canvas
 * it increments a counter by 1. This is the smart object calculate counter
 * that this function returns the value of. It starts at the value of 0 and
 * will increase (and eventually wrap around to negative values and so on) by
 * 1 every time objects are calculated. You can use this counter to ensure
 * you don't re-do calculations withint the same calculation generation/run
 * if the calculations maybe cause self-feeding effects.
 *
 * @ingroup Evas_Smart_Object_Group
 * @since 1.1
 */
EAPI int          evas_smart_objects_calculate_count_get(const Evas *e);

#include "canvas/evas_object_smart.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Smart_Object_Clipped
 *
 * @{
 */
/**
 * Get the clipper object for the given clipped smart object.
 *
 * @param obj the clipped smart object to retrieve associated clipper
 * from.
 * @return the clipper object.
 *
 * Use this function if you want to change any of this clipper's
 * properties, like colors.
 *
 * @see evas_object_smart_clipped_smart_add()
 */
EAPI Evas_Object            *evas_object_smart_clipped_clipper_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

#include "canvas/evas_smart_clipped.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Box
 *
 * @{
 */
 
 /**
 * Add a new box object on the provided canvas.
 *
 * @param evas The canvas to create the box object on.
 * @return @c NULL on error, a pointer to a new box object on
 * success.
 *
 * After instantiation, if a box object hasn't its layout function
 * set, via evas_object_box_layout_set(), it will have it by default
 * set to evas_object_box_layout_horizontal(). The remaining
 * properties of the box must be set/retrieved via
 * <c>evas_object_box_{h,v}_{align,padding}_{get,set)()</c>.
 */
EAPI Evas_Object               *evas_object_box_add(Evas *evas) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get a property's value (by its given numerical identifier), on a
 * given box child element -- by a variable argument list
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to get a property from
 * @param property The numerical ID of the given property
 * @param args The variable argument list with pointers to where to
 * store the values of this property. They @b must point to variables
 * of the same type the user has defined for them.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * This is a variable argument list variant of the
 * evas_object_box_option_property_get(). See its documentation for
 * more details.
 */
EAPI Eina_Bool                  evas_object_box_option_property_vget(const Evas_Object *o, Evas_Object_Box_Option *opt, int property, va_list args) EINA_ARG_NONNULL(1, 2);

/**
 * Set a property value (by its given numerical identifier), on a
 * given box child element -- by a variable argument list
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to set a property on
 * @param property The numerical ID of the given property
 * @param args The variable argument list implementing the value to
 * be set for this property. It @b must be of the same type the user has
 * defined for it.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * This is a variable argument list variant of the
 * evas_object_box_option_property_set(). See its documentation for
 * more details.
 */
EAPI Eina_Bool                  evas_object_box_option_property_vset(Evas_Object *o, Evas_Object_Box_Option *opt, int property, va_list args) EINA_ARG_NONNULL(1, 2);

/**
 * Set a property value (by its given numerical identifier), on a
 * given box child element
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to set a property on
 * @param property The numerical ID of the given property
 * @param ... (List of) actual value(s) to be set for this
 * property. It (they) @b must be of the same type the user has
 * defined for it (them).
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * @note This call won't do anything for a canonical Evas box. Only
 * users which have @b subclassed it, setting custom box items options
 * (see #Evas_Object_Box_Option) on it, would benefit from this
 * function. They'd have to implement it and set it to be the
 * _Evas_Object_Box_Api::property_set smart class function of the box,
 * which is originally set to @c NULL.
 *
 * @note This function will internally create a variable argument
 * list, with the values passed after @p property, and call
 * evas_object_box_option_property_vset() with this list and the same
 * previous arguments.
 */
EAPI Eina_Bool                  evas_object_box_option_property_set(Evas_Object *o, Evas_Object_Box_Option *opt, int property, ...) EINA_ARG_NONNULL(1, 2);

/**
 * Get a property's value (by its given numerical identifier), on a
 * given box child element
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to get a property from
 * @param property The numerical ID of the given property
 * @param ... (List of) pointer(s) where to store the value(s) set for
 * this property. It (they) @b must point to variable(s) of the same
 * type the user has defined for it (them).
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * @note This call won't do anything for a canonical Evas box. Only
 * users which have @b subclassed it, getting custom box items options
 * (see #Evas_Object_Box_Option) on it, would benefit from this
 * function. They'd have to implement it and get it to be the
 * _Evas_Object_Box_Api::property_get smart class function of the
 * box, which is originally get to @c NULL.
 *
 * @note This function will internally create a variable argument
 * list, with the values passed after @p property, and call
 * evas_object_box_option_property_vget() with this list and the same
 * previous arguments.
 */
EAPI Eina_Bool                  evas_object_box_option_property_get(const Evas_Object *o, Evas_Object_Box_Option *opt, int property, ...) EINA_ARG_NONNULL(1, 2);

/**
 * Get the list of children objects in a given box object.
 *
 * @param o The box to retrieve an items list from
 * @return A list of @p o's child objects, on success, or @c NULL,
 * on errors (or if it has no child objects)
 *
 * The returned list should be freed with @c eina_list_free() when you
 * no longer need it.
 *
 * @note This is a duplicate of the list kept by the box internally.
 *       It's up to the user to destroy it when it no longer needs it.
 *       It's possible to remove objects from the box when walking
 *       this list, but these removals won't be reflected on it.
 */
EAPI Eina_List                 *evas_object_box_children_get(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

#include "canvas/evas_box.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Table
 *
 * @{
 */
/**
 * @brief Create a new table.
 *
 * @param evas Canvas in which table will be added.
 */
EAPI Evas_Object                       *evas_object_table_add(Evas *evas) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get the child of the table at the given coordinates
 *
 * @note This does not take into account col/row spanning
 */
EAPI Evas_Object                       *evas_object_table_child_get(const Evas_Object *o, unsigned short col, unsigned short row) EINA_ARG_NONNULL(1);

#include "canvas/evas_table.eo.legacy.h"

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Grid
 *
 * @{
 */
/**
 * Create a new grid.
 *
 * It's set to a virtual size of 1x1 by default and add children with
 * evas_object_grid_pack().
 * @since 1.1
 */
EAPI Evas_Object   *evas_object_grid_add(Evas *evas) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

#include "canvas/evas_grid.eo.legacy.h"

/**
 * @}
 */

/**
 *
 * Adds an output to the canvas
 *
 * @parem e The canvas to add the output to
 * @return The output
 *
 * @see evas_out_engine_info_set
 * @see evas_output_viewport_set
 * @see evas_output_size_set
 *
 * @since 1.8
 */
EAPI Evas_Out *evas_out_add(Evas *e);

/**
 *
 * Deletes an output
 *
 * @parem evo The output object
 *
 * @see evas_out_add
 *
 * @since 1.8
 *
 */
EAPI void evas_output_del(Evas_Out *evo);

#include "canvas/evas_out.eo.legacy.h"