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+/**
+ * @defgroup Slider Slider
+ * @ingroup Elementary
+ *
+ * @image html img/widget/slider/preview-00.png
+ * @image latex img/widget/slider/preview-00.eps width=\textwidth
+ *
+ * The slider adds a draggable “slider” widget for selecting the value of
+ * something within a range.
+ *
+ * A slider can be horizontal or vertical. It can contain an Icon and has a
+ * primary label as well as a units label (that is formatted with floating
+ * point values and thus accepts a printf-style format string, like
+ * “%1.2f units”. There is also an indicator string that may be somewhere
+ * else (like on the slider itself) that also accepts a format string like
+ * units. Label, Icon Unit and Indicator strings/objects are optional.
+ *
+ * A slider may be inverted which means values invert, with high vales being
+ * on the left or top and low values on the right or bottom (as opposed to
+ * normally being low on the left or top and high on the bottom and right).
+ *
+ * The slider should have its minimum and maximum values set by the
+ * application with  elm_slider_min_max_set() and value should also be set by
+ * the application before use with  elm_slider_value_set(). The span of the
+ * slider is its length (horizontally or vertically). This will be scaled by
+ * the object or applications scaling factor. At any point code can query the
+ * slider for its value with elm_slider_value_get().
+ *
+ * Smart callbacks one can listen to:
+ * - "changed" - Whenever the slider value is changed by the user.
+ * - "slider,drag,start" - dragging the slider indicator around has started.
+ * - "slider,drag,stop" - dragging the slider indicator around has stopped.
+ * - "delay,changed" - A short time after the value is changed by the user.
+ * This will be called only when the user stops dragging for
+ * a very short period or when they release their
+ * finger/mouse, so it avoids possibly expensive reactions to
+ * the value change.
+ *
+ * Available styles for it:
+ * - @c "default"
+ *
+ * Default content parts of the slider widget that you can use for are:
+ * @li "icon" - An icon of the slider
+ * @li "end" - A end part content of the slider
+ *
+ * Default text parts of the slider widget that you can use for are:
+ * @li "default" - Label of the slider
+ *
+ * Supported elm_object common APIs.
+ * @li @ref elm_object_disabled_set
+ * @li @ref elm_object_disabled_get
+ * @li @ref elm_object_part_text_set
+ * @li @ref elm_object_part_text_get
+ * @li @ref elm_object_part_content_set
+ * @li @ref elm_object_part_content_get
+ * @li @ref elm_object_part_content_unset
+ *
+ * Here is an example on its usage:
+ * @li @ref slider_example
+ */
+
+/**
+ * @addtogroup Slider
+ * @{
+ */
+
+/**
+ * Add a new slider widget to the given parent Elementary
+ * (container) object.
+ *
+ * @param parent The parent object.
+ * @return a new slider widget handle or @c NULL, on errors.
+ *
+ * This function inserts a new slider widget on the canvas.
+ *
+ * @ingroup Slider
+ */
+EAPI Evas_Object                 *elm_slider_add(Evas_Object *parent);
+
+/**
+ * Set the (exact) length of the bar region of a given slider widget.
+ *
+ * @param obj The slider object.
+ * @param size The length of the slider's bar region.
+ *
+ * This sets the minimum width (when in horizontal mode) or height
+ * (when in vertical mode) of the actual bar area of the slider
+ * @p obj. This in turn affects the object's minimum size. Use
+ * this when you're not setting other size hints expanding on the
+ * given direction (like weight and alignment hints) and you would
+ * like it to have a specific size.
+ *
+ * @note Icon, end, label, indicator and unit text around @p obj
+ * will require their
+ * own space, which will make @p obj to require more the @p size,
+ * actually.
+ *
+ * @see elm_slider_span_size_get()
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_span_size_set(Evas_Object *obj, Evas_Coord size);
+
+/**
+ * Get the length set for the bar region of a given slider widget
+ *
+ * @param obj The slider object.
+ * @return The length of the slider's bar region.
+ *
+ * If that size was not set previously, with
+ * elm_slider_span_size_set(), this call will return @c 0.
+ *
+ * @ingroup Slider
+ */
+EAPI Evas_Coord                   elm_slider_span_size_get(const Evas_Object *obj);
+
+/**
+ * Set the format string for the unit label.
+ *
+ * @param obj The slider object.
+ * @param format The format string for the unit display.
+ *
+ * Unit label is displayed all the time, if set, after slider's bar.
+ * In horizontal mode, at right and in vertical mode, at bottom.
+ *
+ * If @c NULL, unit label won't be visible. If not it sets the format
+ * string for the label text. To the label text is provided a floating point
+ * value, so the label text can display up to 1 floating point value.
+ * Note that this is optional.
+ *
+ * Use a format string such as "%1.2f meters" for example, and it will
+ * display values like: "3.14 meters" for a value equal to 3.14159.
+ *
+ * Default is unit label disabled.
+ *
+ * @see elm_slider_indicator_format_get()
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_unit_format_set(Evas_Object *obj, const char *format);
+
+/**
+ * Get the unit label format of the slider.
+ *
+ * @param obj The slider object.
+ * @return The unit label format string in UTF-8.
+ *
+ * Unit label is displayed all the time, if set, after slider's bar.
+ * In horizontal mode, at right and in vertical mode, at bottom.
+ *
+ * @see elm_slider_unit_format_set() for more
+ * information on how this works.
+ *
+ * @ingroup Slider
+ */
+EAPI const char                  *elm_slider_unit_format_get(const Evas_Object *obj);
+
+/**
+ * Set the format string for the indicator label.
+ *
+ * @param obj The slider object.
+ * @param indicator The format string for the indicator display.
+ *
+ * The slider may display its value somewhere else then unit label,
+ * for example, above the slider knob that is dragged around. This function
+ * sets the format string used for this.
+ *
+ * If @c NULL, indicator label won't be visible. If not it sets the format
+ * string for the label text. To the label text is provided a floating point
+ * value, so the label text can display up to 1 floating point value.
+ * Note that this is optional.
+ *
+ * Use a format string such as "%1.2f meters" for example, and it will
+ * display values like: "3.14 meters" for a value equal to 3.14159.
+ *
+ * Default is indicator label disabled.
+ *
+ * @see elm_slider_indicator_format_get()
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_indicator_format_set(Evas_Object *obj, const char *indicator);
+
+/**
+ * Get the indicator label format of the slider.
+ *
+ * @param obj The slider object.
+ * @return The indicator label format string in UTF-8.
+ *
+ * The slider may display its value somewhere else then unit label,
+ * for example, above the slider knob that is dragged around. This function
+ * gets the format string used for this.
+ *
+ * @see elm_slider_indicator_format_set() for more
+ * information on how this works.
+ *
+ * @ingroup Slider
+ */
+EAPI const char                  *elm_slider_indicator_format_get(const Evas_Object *obj);
+
+/**
+ * Set the format function pointer for the indicator label
+ *
+ * @param obj The slider object.
+ * @param func The indicator format function.
+ * @param free_func The freeing function for the format string.
+ *
+ * Set the callback function to format the indicator string.
+ *
+ * @see elm_slider_indicator_format_set() for more info on how this works.
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_indicator_format_function_set(Evas_Object *obj, char *(*func)(double val), void (*free_func)(char *str));
+
+/**
+ * Set the format function pointer for the units label
+ *
+ * @param obj The slider object.
+ * @param func The units format function.
+ * @param free_func The freeing function for the format string.
+ *
+ * Set the callback function to format the indicator string.
+ *
+ * @see elm_slider_units_format_set() for more info on how this works.
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_units_format_function_set(Evas_Object *obj, char *(*func)(double val), void (*free_func)(char *str));
+
+/**
+ * Set the orientation of a given slider widget.
+ *
+ * @param obj The slider object.
+ * @param horizontal Use @c EINA_TRUE to make @p obj to be
+ * @b horizontal, @c EINA_FALSE to make it @b vertical.
+ *
+ * Use this function to change how your slider is to be
+ * disposed: vertically or horizontally.
+ *
+ * By default it's displayed horizontally.
+ *
+ * @see elm_slider_horizontal_get()
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_horizontal_set(Evas_Object *obj, Eina_Bool horizontal);
+
+/**
+ * Retrieve the orientation of a given slider widget
+ *
+ * @param obj The slider object.
+ * @return @c EINA_TRUE, if @p obj is set to be @b horizontal,
+ * @c EINA_FALSE if it's @b vertical (and on errors).
+ *
+ * @see elm_slider_horizontal_set() for more details.
+ *
+ * @ingroup Slider
+ */
+EAPI Eina_Bool                    elm_slider_horizontal_get(const Evas_Object *obj);
+
+/**
+ * Set the minimum and maximum values for the slider.
+ *
+ * @param obj The slider object.
+ * @param min The minimum value.
+ * @param max The maximum value.
+ *
+ * Define the allowed range of values to be selected by the user.
+ *
+ * If actual value is less than @p min, it will be updated to @p min. If it
+ * is bigger then @p max, will be updated to @p max. Actual value can be
+ * get with elm_slider_value_get().
+ *
+ * By default, min is equal to 0.0, and max is equal to 1.0.
+ *
+ * @warning Maximum must be greater than minimum, otherwise behavior
+ * is undefined.
+ *
+ * @see elm_slider_min_max_get()
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_min_max_set(Evas_Object *obj, double min, double max);
+
+/**
+ * Get the minimum and maximum values of the slider.
+ *
+ * @param obj The slider object.
+ * @param min Pointer to store the minimum value.
+ * @param max Pointer to store the maximum value.
+ *
+ * @note If only one value is needed, the other pointer can be passed
+ * as @c NULL.
+ *
+ * @see elm_slider_min_max_set() for details.
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_min_max_get(const Evas_Object *obj, double *min, double *max);
+
+/**
+ * Set the value the slider displays.
+ *
+ * @param obj The slider object.
+ * @param val The value to be displayed.
+ *
+ * Value will be presented on the unit label following format specified with
+ * elm_slider_unit_format_set() and on indicator with
+ * elm_slider_indicator_format_set().
+ *
+ * @warning The value must to be between min and max values. This values
+ * are set by elm_slider_min_max_set().
+ *
+ * @see elm_slider_value_get()
+ * @see elm_slider_unit_format_set()
+ * @see elm_slider_indicator_format_set()
+ * @see elm_slider_min_max_set()
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_value_set(Evas_Object *obj, double val);
+
+/**
+ * Get the value displayed by the spinner.
+ *
+ * @param obj The spinner object.
+ * @return The value displayed.
+ *
+ * @see elm_spinner_value_set() for details.
+ *
+ * @ingroup Slider
+ */
+EAPI double                       elm_slider_value_get(const Evas_Object *obj);
+
+/**
+ * Invert a given slider widget's displaying values order
+ *
+ * @param obj The slider object.
+ * @param inverted Use @c EINA_TRUE to make @p obj inverted,
+ * @c EINA_FALSE to bring it back to default, non-inverted values.
+ *
+ * A slider may be @b inverted, in which state it gets its
+ * values inverted, with high vales being on the left or top and
+ * low values on the right or bottom, as opposed to normally have
+ * the low values on the former and high values on the latter,
+ * respectively, for horizontal and vertical modes.
+ *
+ * @see elm_slider_inverted_get()
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_inverted_set(Evas_Object *obj, Eina_Bool inverted);
+
+/**
+ * Get whether a given slider widget's displaying values are
+ * inverted or not.
+ *
+ * @param obj The slider object.
+ * @return @c EINA_TRUE, if @p obj has inverted values,
+ * @c EINA_FALSE otherwise (and on errors).
+ *
+ * @see elm_slider_inverted_set() for more details.
+ *
+ * @ingroup Slider
+ */
+EAPI Eina_Bool                    elm_slider_inverted_get(const Evas_Object *obj);
+
+/**
+ * Set whether to enlarge slider indicator (augmented knob) or not.
+ *
+ * @param obj The slider object.
+ * @param show @c EINA_TRUE will make it enlarge, @c EINA_FALSE will
+ * let the knob always at default size.
+ *
+ * By default, indicator will be bigger while dragged by the user.
+ *
+ * @warning It won't display values set with
+ * elm_slider_indicator_format_set() if you disable indicator.
+ *
+ * @ingroup Slider
+ */
+EAPI void                         elm_slider_indicator_show_set(Evas_Object *obj, Eina_Bool show);
+
+/**
+ * Get whether a given slider widget's enlarging indicator or not.
+ *
+ * @param obj The slider object.
+ * @return @c EINA_TRUE, if @p obj is enlarging indicator, or
+ * @c EINA_FALSE otherwise (and on errors).
+ *
+ * @see elm_slider_indicator_show_set() for details.
+ *
+ * @ingroup Slider
+ */
+EAPI Eina_Bool                    elm_slider_indicator_show_get(const Evas_Object *obj);
+
+/**
+ * @}
+ */