429 lines
13 KiB
C
429 lines
13 KiB
C
/**
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* @defgroup Calendar Calendar
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*
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* This is a Calendar widget. Calender widget helps applications to flexibly
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* display a calender with day of the week, day, year and month. Applications will be
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* able to choose a specific date that will be reported in the smart_callbacks for
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* the calendar widget. The APIs of calendar widget let the applications perform
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* other functions like,
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* placing marks on specific dates
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* Setting the bounds for the calendar (minimum and maximum years)
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* Setting the day names of the week. ( for ex. Thu. or Thursday)
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* Setting the year and month format.
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*
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* Signals that you can add callbacks for are:
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* - @c "changed" - emitted when the date in the calendar is changed.
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*
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* Supported elm_object common APIs.
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* @li elm_object_signal_emit
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* @li elm_object_signal_callback_add
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* @li elm_object_signal_callback_del
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*
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*/
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/**
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* @addtogroup Calendar
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* @{
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*/
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typedef enum
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{
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ELM_CALENDAR_UNIQUE, /**< Default value. Marks will be displayed only on event day. */
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ELM_CALENDAR_DAILY, /**< Marks will be displayed everyday after event day (inclusive). */
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ELM_CALENDAR_WEEKLY, /**< Marks will be displayed every week after event day (inclusive) - i.e. each seven days. */
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ELM_CALENDAR_MONTHLY, /**< Marks will be displayed every month day that coincides to event day. E.g.: if an event is set to 30th Jan, no marks will be displayed on Feb, but will be displayed on 30th Mar*/
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ELM_CALENDAR_ANNUALLY /**< Marks will be displayed every year that coincides to event day (and month). E.g. an event added to 30th Jan 2012 will be repeated on 30th Jan 2013. */
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} _Elm_Calendar_Mark_Repeat_Type;
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/**
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* @enum _Elm_Calendar_Mark_Repeat_Type
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* @typedef Elm_Calendar_Mark_Repeat_Type
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*
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* Event periodicity, used to define if a mark should be repeated
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* @b beyond event's day. It's set when a mark is added.
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*
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* So, for a mark added to 13th May with periodicity set to WEEKLY,
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* there will be marks every week after this date. Marks will be displayed
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* at 13th, 20th, 27th, 3rd June ...
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*
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* Values don't work as bitmask, only one can be chosen.
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*
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* @see elm_calendar_mark_add()
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*
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* @ingroup Calendar
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*/
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typedef _Elm_Calendar_Mark_Repeat_Type Elm_Calendar_Mark_Repeat_Type;
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typedef struct _Elm_Calendar_Mark Elm_Calendar_Mark; /**< Item handle for a calendar mark. Created with elm_calendar_mark_add() and deleted with elm_calendar_mark_del(). */
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/**
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* Add a new calendar widget to the given parent Elementary
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* (container) object.
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*
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* @param parent The parent object.
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* @return a new calendar widget handle or @c NULL, on errors.
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*
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* This function inserts a new calendar widget on the canvas.
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*
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* @ref calendar_example_01
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*
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* @ingroup Calendar
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*/
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EAPI Evas_Object *elm_calendar_add(Evas_Object *parent);
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/**
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* Get weekdays names displayed by the calendar.
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*
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* @param obj The calendar object.
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* @return Array of seven strings to be used as weekday names.
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*
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* By default, weekdays abbreviations get from system are displayed:
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* E.g. for an en_US locale: "Sun, Mon, Tue, Wed, Thu, Fri, Sat"
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* The first string is related to Sunday, the second to Monday...
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*
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* @see elm_calendar_weekdays_name_set()
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*
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* @ref calendar_example_05
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*
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* @ingroup Calendar
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*/
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EAPI const char **elm_calendar_weekdays_names_get(const Evas_Object *obj);
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/**
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* Set weekdays names to be displayed by the calendar.
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*
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* @param obj The calendar object.
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* @param weekdays Array of seven strings to be used as weekday names.
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* @warning It must have 7 elements, or it will access invalid memory.
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* @warning The strings must be NULL terminated ('@\0').
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*
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* By default, weekdays abbreviations get from system are displayed:
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* E.g. for an en_US locale: "Sun, Mon, Tue, Wed, Thu, Fri, Sat"
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*
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* The first string should be related to Sunday, the second to Monday...
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*
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* The usage should be like this:
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* @code
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* const char *weekdays[] =
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* {
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* "Sunday", "Monday", "Tuesday", "Wednesday",
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* "Thursday", "Friday", "Saturday"
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* };
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* elm_calendar_weekdays_names_set(calendar, weekdays);
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* @endcode
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*
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* @see elm_calendar_weekdays_name_get()
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*
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* @ref calendar_example_02
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_weekdays_names_set(Evas_Object *obj, const char *weekdays[]);
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/**
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* Set the minimum and maximum values for the year
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*
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* @param obj The calendar object
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* @param min The minimum year, greater than 1901;
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* @param max The maximum year;
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*
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* Maximum must be greater than minimum, except if you don't want to set
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* maximum year.
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* Default values are 1902 and -1.
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*
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* If the maximum year is a negative value, it will be limited depending
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* on the platform architecture (year 2037 for 32 bits);
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*
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* @see elm_calendar_min_max_year_get()
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*
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* @ref calendar_example_03
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_min_max_year_set(Evas_Object *obj, int min, int max);
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/**
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* Get the minimum and maximum values for the year
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*
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* @param obj The calendar object.
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* @param min The minimum year.
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* @param max The maximum year.
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*
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* Default values are 1902 and -1.
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*
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* @see elm_calendar_min_max_year_get() for more details.
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*
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* @ref calendar_example_05
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_min_max_year_get(const Evas_Object *obj, int *min, int *max);
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/**
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* Enable or disable day selection
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*
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* @param obj The calendar object.
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* @param disabled @c EINA_TRUE to disable selection or @c EINA_FALSE to
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* enable it.
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*
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* Enabled by default. If disabled, the user still can select months,
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* but not days. Selected days are highlighted on calendar.
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* It should be used if you won't need such selection for the widget usage.
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*
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* When a day is selected, or month is changed, smart callbacks for
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* signal "changed" will be called.
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*
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* @see elm_calendar_day_selection_disabled_get()
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*
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* @ref calendar_example_04
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_day_selection_disabled_set(Evas_Object *obj, Eina_Bool disabled);
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/**
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* Get a value whether day selection is disabled or not.
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*
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* @param obj The calendar object.
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* @return EINA_TRUE means day selection is disabled. EINA_FALSE indicates
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* it's enabled. If @p obj is NULL, EINA_FALSE is returned.
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*
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* @see elm_calendar_day_selection_disabled_set() for details.
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*
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* @ref calendar_example_05
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*
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* @ingroup Calendar
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*/
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EAPI Eina_Bool elm_calendar_day_selection_disabled_get(const Evas_Object *obj);
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/**
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* Set selected date to be highlighted on calendar.
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*
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* @param obj The calendar object.
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* @param selected_time A @b tm struct to represent the selected date.
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*
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* Set the selected date, changing the displayed month if needed.
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* Selected date changes when the user goes to next/previous month or
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* select a day pressing over it on calendar.
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*
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* @see elm_calendar_selected_time_get()
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*
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* @ref calendar_example_04
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_selected_time_set(Evas_Object *obj, struct tm *selected_time);
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/**
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* Get selected date.
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*
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* @param obj The calendar object
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* @param selected_time A @b tm struct to point to selected date
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* @return EINA_FALSE means an error occurred and returned time shouldn't
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* be considered.
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*
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* Get date selected by the user or set by function
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* elm_calendar_selected_time_set().
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* Selected date changes when the user goes to next/previous month or
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* select a day pressing over it on calendar.
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*
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* @see elm_calendar_selected_time_get()
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*
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* @ref calendar_example_05
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*
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* @ingroup Calendar
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*/
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EAPI Eina_Bool elm_calendar_selected_time_get(const Evas_Object *obj, struct tm *selected_time);
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/**
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* Set a function to format the string that will be used to display
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* month and year;
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*
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* @param obj The calendar object
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* @param format_function Function to set the month-year string given
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* the selected date
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*
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* By default it uses strftime with "%B %Y" format string.
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* It should allocate the memory that will be used by the string,
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* that will be freed by the widget after usage.
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* A pointer to the string and a pointer to the time struct will be provided.
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*
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* Example:
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* @code
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* static char *
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* _format_month_year(struct tm *selected_time)
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* {
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* char buf[32];
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* if (!strftime(buf, sizeof(buf), "%B %Y", selected_time)) return NULL;
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* return strdup(buf);
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* }
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*
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* elm_calendar_format_function_set(calendar, _format_month_year);
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* @endcode
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*
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* @ref calendar_example_02
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_format_function_set(Evas_Object *obj, char *(*format_function)(struct tm *stime));
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/**
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* Add a new mark to the calendar
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*
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* @param obj The calendar object
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* @param mark_type A string used to define the type of mark. It will be
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* emitted to the theme, that should display a related modification on these
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* days representation.
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* @param mark_time A time struct to represent the date of inclusion of the
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* mark. For marks that repeats it will just be displayed after the inclusion
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* date in the calendar.
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* @param repeat Repeat the event following this periodicity. Can be a unique
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* mark (that don't repeat), daily, weekly, monthly or annually.
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* @return The created mark or @p NULL upon failure.
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*
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* Add a mark that will be drawn in the calendar respecting the insertion
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* time and periodicity. It will emit the type as signal to the widget theme.
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* Default theme supports "holiday" and "checked", but it can be extended.
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*
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* It won't immediately update the calendar, drawing the marks.
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* For this, call elm_calendar_marks_draw(). However, when user selects
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* next or previous month calendar forces marks drawn.
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*
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* Marks created with this method can be deleted with
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* elm_calendar_mark_del().
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*
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* Example
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* @code
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* struct tm selected_time;
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* time_t current_time;
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*
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* current_time = time(NULL) + 5 * 84600;
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* localtime_r(¤t_time, &selected_time);
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* elm_calendar_mark_add(cal, "holiday", selected_time,
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* ELM_CALENDAR_ANNUALLY);
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*
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* current_time = time(NULL) + 1 * 84600;
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* localtime_r(¤t_time, &selected_time);
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* elm_calendar_mark_add(cal, "checked", selected_time, ELM_CALENDAR_UNIQUE);
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*
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* elm_calendar_marks_draw(cal);
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* @endcode
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*
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* @see elm_calendar_marks_draw()
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* @see elm_calendar_mark_del()
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*
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* @ref calendar_example_06
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*
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* @ingroup Calendar
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*/
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EAPI Elm_Calendar_Mark *elm_calendar_mark_add(Evas_Object *obj, const char *mark_type, struct tm *mark_time, Elm_Calendar_Mark_Repeat_Type repeat);
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/**
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* Delete mark from the calendar.
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*
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* @param mark The mark to be deleted.
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*
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* If deleting all calendar marks is required, elm_calendar_marks_clear()
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* should be used instead of getting marks list and deleting each one.
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*
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* @see elm_calendar_mark_add()
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*
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* @ref calendar_example_06
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_mark_del(Elm_Calendar_Mark *mark);
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/**
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* Remove all calendar's marks
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*
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* @param obj The calendar object.
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*
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* @see elm_calendar_mark_add()
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* @see elm_calendar_mark_del()
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_marks_clear(Evas_Object *obj);
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/**
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* Get a list of all the calendar marks.
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*
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* @param obj The calendar object.
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* @return An @c Eina_List of calendar marks objects, or @c NULL on failure.
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*
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* @see elm_calendar_mark_add()
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* @see elm_calendar_mark_del()
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* @see elm_calendar_marks_clear()
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*
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* @ingroup Calendar
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*/
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EAPI const Eina_List *elm_calendar_marks_get(const Evas_Object *obj);
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/**
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* Draw calendar marks.
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*
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* @param obj The calendar object.
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*
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* Should be used after adding, removing or clearing marks.
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* It will go through the entire marks list updating the calendar.
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* If lots of marks will be added, add all the marks and then call
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* this function.
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*
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* When the month is changed, i.e. user selects next or previous month,
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* marks will be drawn.
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*
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* @see elm_calendar_mark_add()
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* @see elm_calendar_mark_del()
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* @see elm_calendar_marks_clear()
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*
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* @ref calendar_example_06
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_marks_draw(Evas_Object *obj);
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/**
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* Set the interval on time updates for an user mouse button hold
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* on calendar widgets' month selection.
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*
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* @param obj The calendar object
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* @param interval The (first) interval value in seconds
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*
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* This interval value is @b decreased while the user holds the
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* mouse pointer either selecting next or previous month.
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*
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* This helps the user to get to a given month distant from the
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* current one easier/faster, as it will start to change quicker and
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* quicker on mouse button holds.
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*
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* The calculation for the next change interval value, starting from
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* the one set with this call, is the previous interval divided by
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* 1.05, so it decreases a little bit.
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*
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* The default starting interval value for automatic changes is
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* @b 0.85 seconds.
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*
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* @see elm_calendar_interval_get()
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*
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* @ingroup Calendar
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*/
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EAPI void elm_calendar_interval_set(Evas_Object *obj, double interval);
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/**
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* Get the interval on time updates for an user mouse button hold
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* on calendar widgets' month selection.
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*
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* @param obj The calendar object
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* @return The (first) interval value, in seconds, set on it
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*
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* @see elm_calendar_interval_set() for more details
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*
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* @ingroup Calendar
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*/
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EAPI double elm_calendar_interval_get(const Evas_Object *obj);
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/**
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* @}
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*/
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