593 lines
23 KiB
C
593 lines
23 KiB
C
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/**
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* @defgroup Datetime Datetime
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*
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*
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* @image html img/widget/datetime/preview-00.png
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* @image latex img/widget/datetime/preview-00.eps
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*
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* @image html img/widget/datetime/preview-01.png
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* @image latex img/widget/datetime/preview-01.eps
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*
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* @image html img/widget/datetime/preview-02.png
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* @image latex img/widget/datetime/preview-02.eps
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*
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* Datetime widget is used to display and input date & time values.
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* This widget displays date and time as per the <b>system's locale</b> settings (Date
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* includes Day, Month & Year along with the defined separators and
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* Time includes Hour, Minute & AM/PM fields. Separator for AM/PM field is ignored.
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*
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* The corresponding Month, AM/PM strings are displayed according to the
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* system’s language settings.
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*
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* Datetime format is a combination of LIBC standard characters like
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* “%%d %%b %%Y %%I : %%M %%p” which, as a whole represents both Date as well as Time
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* format.
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*
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* Elm_datetime supports only the following sub set of libc date format specifiers:
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*
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* @b %%Y : The year as a decimal number including the century (example: 2011).
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*
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* @b %%y : The year as a decimal number without a century (range 00 to 99)
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*
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* @b %%m : The month as a decimal number (range 01 to 12).
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*
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* @b %%b : The abbreviated month name according to the current locale.
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*
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* @b %%B : The full month name according to the current locale.
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*
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* @b %%h : The abbreviated month name according to the current locale(same as %%b).
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*
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* @b %%d : The day of the month as a decimal number (range 01 to 31).
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*
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* @b %%e : The day of the month as a decimal number (range 1 to 31). single
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* digits are preceded by a blank.
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*
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* @b %%I : The hour as a decimal number using a 12-hour clock (range 01 to 12).
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*
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* @b %%H : The hour as a decimal number using a 24-hour clock (range 00 to 23).
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*
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* @b %%k : The hour (24-hour clock) as a decimal number (range 0 to 23). single
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* digits are preceded by a blank.
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*
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* @b %%l : The hour (12-hour clock) as a decimal number (range 1 to 12); single
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* digits are preceded by a blank.
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*
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* @b %%M : The minute as a decimal number (range 00 to 59).
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*
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* @b %%p : Either 'AM' or 'PM' according to the given time value, or the
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* corresponding strings for the current locale. Noon is treated as 'PM'
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* and midnight as 'AM'
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*
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* @b %%P : Like %p but in lower case: 'am' or 'pm' or a corresponding string for
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* the current locale.
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*
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* @b %%c : The preferred date and time representation for the current locale.
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*
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* @b %%x : The preferred date representation for the current locale without the time.
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*
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* @b %%X : The preferred time representation for the current locale without the date.
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*
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* @b %%r : The complete calendar time using the AM/PM format of the current locale.
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*
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* @b %%R : The hour and minute in decimal numbers using the format %H:%M.
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*
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* @b %%T : The time of day in decimal numbers using the format %H:%M:%S.
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*
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* @b %%D : The date using the format %%m/%%d/%%y.
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*
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* @b %%F : The date using the format %%Y-%%m-%%d.
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*
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* (For more reference on the available <b>LIBC date format specifiers</b>, please
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* visit the link:
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* http://www.gnu.org/s/hello/manual/libc.html#Formatting-Calendar-Time )
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*
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* Datetime widget can provide Unicode @b separators in between its fields
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* except for AM/PM field.
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* A separator can be any <b>Unicode character</b> other than the LIBC standard
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* date format specifiers.( Example: In the format %%b %%d @b , %%y %%H @b : %%M
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* comma(,) is separator for date field %%d and colon(:) is separator for
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* hour field %%H ).
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*
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* The default format is a predefined one, based on the system Locale.
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*
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* Hour format 12hr(1-12) or 24hr(0-23) display can be selected by setting
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* the corresponding user format.
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*
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* Datetime supports six fields: Year, Month, Date, Hour, Minute, AM/PM.
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* Depending on the Datetime module that is loaded, the user can see
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* different UI to select the individual field values.
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*
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* The individual fields of Datetime can be arranged in any order according to the format
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* set by application.
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*
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* There is a provision to set the visibility of a particular field as TRUE/ FALSE
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* so that <b>only time/ only date / only required fields</b> will be displayed.
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*
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* Each field is having a default minimum and maximum values just like the daily
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* calendar information. These min/max values can be modified as per the application usage.
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*
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* User can enter the values only in between the range of maximum and minimum.
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* Apart from these APIs, there is a provision to display only a limited set of
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* values out of the possible values. APIs to select the individual field limits
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* are intended for this purpose.
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*
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* The whole widget is left aligned and its size grows horizontally depending
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* on the current format and each field's visible/disabled state.
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*
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* Datetime individual field selection is implemented in a modular style.
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* Module can be implemented as a Ctxpopup based selection or an ISE based
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* selection or even a spinner like selection etc.
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*
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* <b>Datetime Module design:</b>
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*
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* The following functions are expected to be implemented in a Datetime module:
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*
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* <b>Field creation:</b>
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* <pre>
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*
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* __________ __________
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* | |----- obj_hook() ---------------------->>>| |
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* | |<<<----------------returns Mod_data ------| |
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* | Datetime |_______ | |
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* | widget | |Assign module call backs | Module |
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* | base |<<<____| | |
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* | | | |
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* | |----- field_create() ------------------>>>| |
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* |__________|<<<----------------returns field_obj -----|__________|
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*
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* </pre>
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*
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* <b>Field value setting:</b>
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* <pre>
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*
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* __________ __________
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* | | | |
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* | Datetime |<<<----------elm_datetime_value_set()---| |
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* | widget | | Module |
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* | base |----display_field_value()------------>>>| |
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* |__________| |__________|
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*
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* </pre>
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*
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* <b>del_hook:</b>
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* <pre>
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* __________ __________
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* | | | |
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* | Datetime |----obj_unhook()-------------------->>>>| |
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* | widget | | Module |
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* | base | <<<-----frees mod_data---------| |
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* |__________| |__________|
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*
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* </pre>
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*
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*
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* Any module can use the following shared functions that are implemented in elm_datetime.c :
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*
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* <b>field_format_get()</b> - gives the field format.
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*
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* <b>field_limit_get()</b> - gives the field minimum, maximum limits.
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*
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* To enable a module, set the ELM_MODULES environment variable as shown:
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*
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* <b>export ELM_MODULES="datetime_input_ctxpopup>datetime/api"</b>
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*
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*
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* Datetime widgets emits the following signals:
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*
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* @li @b "changed" - whenever Datetime field value is changed, this signal is sent.
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*
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* @li @b "language,changed" - whenever system locale changes, this signal is sent.
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*
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* Here is an example on its usage:
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* @li @ref datetime_example
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*
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*/
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/**
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* @addtogroup Datetime
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* @{
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*/
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/**
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* Identifies a Datetime field, The widget supports 6 fields : Year, month,
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* Date, Hour, Minute, AM/PM
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*
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*/
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typedef enum _Elm_Datetime_Field_Type
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{
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ELM_DATETIME_YEAR = 0, /**< Indicates Year field */
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ELM_DATETIME_MONTH = 1, /**< Indicates Month field */
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ELM_DATETIME_DATE = 2, /**< Indicates Date field */
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ELM_DATETIME_HOUR = 3, /**< Indicates Hour field */
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ELM_DATETIME_MINUTE = 4, /**< Indicates Minute field */
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ELM_DATETIME_AMPM = 5, /**< Indicates AM/PM field */
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} Elm_Datetime_Field_Type;
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/**
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* @brief Adds a new datetime Widget
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*
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* The default datetime format and corresponding strings are based on current locale.
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*
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* @param parent The parent object
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* @return The new object or NULL if it cannot be created
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*
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* This function inserts a new datetime widget on the canvas.
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*
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* @ingroup Datetime
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*/
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EAPI Evas_Object *elm_datetime_add(Evas_Object *parent);
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/**
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* Get the datetime format. Format is a combination of allowed Libc date format
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* specifiers like: "%b %d, %Y %I : %M %p".
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*
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* Maximum allowed format length is 64 chars.
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*
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* Format can include separators for each individual datetime field except
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* for AM/PM field.
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*
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* Each separator can be a maximum of 6 UTF-8 bytes.
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* Space is also taken as a separator but it can come only once for each field.
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*
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* Following are the allowed set of format specifiers for each datetime field.
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*
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* @b %%Y : The year as a decimal number including the century.
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*
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* @b %%y : The year as a decimal number without a century (range 00 to 99).
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*
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* @b %%m : The month as a decimal number (range 01 to 12).
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*
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* @b %%b : The abbreviated month name according to the current locale.
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*
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* @b %%B : The full month name according to the current locale.
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*
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* @b %%h : The abbreviated month name according to the current locale(same as %%b).
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*
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* @b %%d : The day of the month as a decimal number (range 01 to 31).
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*
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* @b %%e : The day of the month as a decimal number (range 1 to 31). single
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* digits are preceded by a blank.
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*
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* @b %%I : The hour as a decimal number using a 12-hour clock (range 01 to 12).
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*
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* @b %%H : The hour as a decimal number using a 24-hour clock (range 00 to 23).
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*
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* @b %%k : The hour (24-hour clock) as a decimal number (range 0 to 23). single
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* digits are preceded by a blank.
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*
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* @b %%l : The hour (12-hour clock) as a decimal number (range 1 to 12); single
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* digits are preceded by a blank.
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*
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* @b %%M : The minute as a decimal number (range 00 to 59).
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*
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* @b %%p : Either 'AM' or 'PM' according to the given time value, or the
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* corresponding strings for the current locale. Noon is treated as 'PM'
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* and midnight as 'AM'.
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*
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* @b %%P : Like %p but in lower case: 'am' or 'pm' or a corresponding string for
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* the current locale.
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*
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* @b %%c : The preferred date and time representation for the current locale.
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*
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* @b %%x : The preferred date representation for the current locale without the time.
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*
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* @b %%X : The preferred time representation for the current locale without the date.
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*
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* @b %%r : The complete calendar time using the AM/PM format of the current locale.
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*
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* @b %%R : The hour and minute in decimal numbers using the format %H:%M.
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*
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* @b %%T : The time of day in decimal numbers using the format %H:%M:%S.
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*
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* @b %%D : The date using the format %%m/%%d/%%y.
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*
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* @b %%F : The date using the format %%Y-%%m-%%d.
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*
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* These specifiers can be arranged in any order and the widget will display the
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* fields accordingly.
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*
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* Default format is taken as per the system locale settings.
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*
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* @param obj The datetime object
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* @return The datetime format string. Example: "%b %d, %Y %I : %M %p"
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*
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* @see elm_datetime_format_set()
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* @ingroup Datetime
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*/
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EAPI const char *elm_datetime_format_get(const Evas_Object *obj);
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/**
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* Set the datetime format. Format is a combination of allowed Libc date format
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* specifiers like: "%b %d, %Y %I : %M %p".
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*
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* Maximum allowed format length is 64 chars.
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*
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* Format can include separators for each individual datetime field except
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* for AM/PM field.
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*
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* Each separator can be a maximum of 6 UTF-8 bytes.
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* Space is also taken as a separator but it can come only once for each field.
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*
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* Following are the allowed set of format specifiers for each datetime field.
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*
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* @b %%Y : The year as a decimal number including the century.
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*
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* @b %%y : The year as a decimal number without a century (range 00 to 99).
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*
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* @b %%m : The month as a decimal number (range 01 to 12).
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*
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* @b %%b : The abbreviated month name according to the current locale.
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*
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* @b %%B : The full month name according to the current locale.
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*
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* @b %%h : The abbreviated month name according to the current locale(same as %%b).
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*
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* @b %%d : The day of the month as a decimal number (range 01 to 31).
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*
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* @b %%e : The day of the month as a decimal number (range 1 to 31). single
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* digits are preceded by a blank.
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*
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* @b %%I : The hour as a decimal number using a 12-hour clock (range 01 to 12).
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*
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* @b %%H : The hour as a decimal number using a 24-hour clock (range 00 to 23).
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*
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* @b %%k : The hour (24-hour clock) as a decimal number (range 0 to 23). single
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* digits are preceded by a blank.
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*
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* @b %%l : The hour (12-hour clock) as a decimal number (range 1 to 12); single
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* digits are preceded by a blank.
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*
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* @b %%M : The minute as a decimal number (range 00 to 59).
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*
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* @b %%p : Either 'AM' or 'PM' according to the given time value, or the
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* corresponding strings for the current locale. Noon is treated as 'PM'
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* and midnight as 'AM'.
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*
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* @b %%P : Like %p but in lower case: 'am' or 'pm' or a corresponding string for
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* the current locale.
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*
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* @b %%c : The preferred date and time representation for the current locale.
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*
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* @b %%x : The preferred date representation for the current locale without the time.
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*
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* @b %%X : The preferred time representation for the current locale without the date.
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*
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* @b %%r : The complete calendar time using the AM/PM format of the current locale.
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*
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* @b %%R : The hour and minute in decimal numbers using the format %H:%M.
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*
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* @b %%T : The time of day in decimal numbers using the format %H:%M:%S.
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*
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* @b %%D : The date using the format %%m/%%d/%%y.
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*
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* @b %%F : The date using the format %%Y-%%m-%%d.
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*
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* These specifiers can be arranged in any order and the widget will display the
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* fields accordingly.
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*
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* Default format is taken as per the system locale settings.
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*
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* @param obj The datetime object
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* @param fmt The datetime format
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*
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* @see elm_datetime_format_get()
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* @ingroup Datetime
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*/
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EAPI void elm_datetime_format_set(Evas_Object *obj, const char *fmt);
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/**
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* @brief Get the upper boundary of a field.
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*
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* Year: years since 1900. Negative value represents year below 1900 (year
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* value -30 represents 1870). Year default range is from 70 to 137.
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*
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* Month: default value range is from 0 to 11.
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*
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* Date: default value range is from 1 to 31 according to the month value.
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*
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* Hour: default value will be in terms of 24 hr format (0~23)
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*
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* Minute: default value range is from 0 to 59.
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*
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* @param obj The datetime object
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* @param maxtime Time structure containing the maximum time value.
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* @return int The maximum value of the field.
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*
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* @see elm_datetime_value_max_set()
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* @ingroup Datetime
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*/
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EAPI Eina_Bool elm_datetime_value_max_get(const Evas_Object *obj, struct tm *maxtime);
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/**
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* @brief Set the upper boundary of a field.
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*
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* Year: years since 1900. Negative value represents year below 1900 (year
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* value -30 represents 1870). Year default range is from 70 to 137.
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*
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* Month: default value range is from 0 to 11.
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*
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* Date: default value range is from 1 to 31 according to the month value.
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*
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* Hour: default value will be in terms of 24 hr format (0~23)
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*
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* Minute: default value range is from 0 to 59.
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*
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* @param obj The datetime object
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* @param maxtime Time structure containing the maximum time value.
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* @return EINA_TRUE if maximum value is accepted.
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*
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* @see elm_datetime_value_max_get()
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* @ingroup Datetime
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*/
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EAPI Eina_Bool elm_datetime_value_max_set(Evas_Object *obj, const struct tm *maxtime);
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/**
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* @brief Get the lower boundary of a field.
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*
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* Year: years since 1900. Negative value represents year below 1900 (year
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* value -30 represents 1870). Year default range is from 70 to 137.
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*
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* Month: default value range is from 0 to 11.
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*
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* Date: default value range is from 1 to 31 according to the month value.
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*
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* Hour: default value will be in terms of 24 hr format (0~23)
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*
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* Minute: default value range is from 0 to 59.
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*
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* @param obj The datetime object
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* @param mintime Time structure.
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* @return EINA_TRUE if minimum value is successfully returned.
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*
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* @see elm_datetime_value_min_set()
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* @ingroup Datepicker
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*/
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EAPI Eina_Bool elm_datetime_value_min_get(const Evas_Object *obj, struct tm *mintime);
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/**
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* @brief Set the lower boundary of a field.
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*
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* Year: years since 1900. Negative value represents year below 1900 (year
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* value -30 represents 1870). Year default range is from 70 to 137.
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*
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* Month: default value range is from 0 to 11.
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*
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* Date: default value range is from 1 to 31 according to the month value.
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*
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* Hour: default value will be in terms of 24 hr format (0~23)
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*
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* Minute: default value range is from 0 to 59.
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*
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* @param obj The datetime object.
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* @param mintime Time structure containing the minimum time value.
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* @return EINA_TRUE if minimum value is accepted.
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*
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* @see elm_datetime_value_min_get()
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* @ingroup Datetime
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*/
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EAPI Eina_Bool elm_datetime_value_min_set(Evas_Object *obj, const struct tm *mintime);
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/**
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* @brief Get the field limits of a field.
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*
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* Limits can be set to individual fields, independently, except for AM/PM field.
|
||
* Any field can display the values only in between these Minimum and Maximum limits unless
|
||
* the corresponding time value is restricted from MinTime to MaxTime.
|
||
* That is, Min/ Max field limits always works under the limitations of MinTime/ MaxTime.
|
||
*
|
||
* There is no provision to set the limits of AM/PM field.
|
||
*
|
||
* @param obj The datetime object
|
||
* @param fieldtype Type of the field. ELM_DATETIME_YEAR etc.
|
||
* @param min Reference to field's minimum value
|
||
* @param max Reference to field's maximum value
|
||
*
|
||
* @see elm_datetime_field_limit_set()
|
||
* @ingroup Datetime
|
||
*/
|
||
EAPI void elm_datetime_field_limit_get(const Evas_Object *obj, Elm_Datetime_Field_Type fieldtype, int *min, int *max);
|
||
|
||
/**
|
||
* @brief Set the field limits of a field.
|
||
*
|
||
* Limits can be set to individual fields, independently, except for AM/PM field.
|
||
* Any field can display the values only in between these Minimum and Maximum limits unless
|
||
* the corresponding time value is restricted from MinTime to MaxTime.
|
||
* That is, Min/ Max field limits always works under the limitations of MinTime/ MaxTime.
|
||
*
|
||
* There is no provision to set the limits of AM/PM field.
|
||
*
|
||
* @param obj The datetime object
|
||
* @param fieldtype Type of the field. ELM_DATETIME_YEAR etc.
|
||
* @param min Reference to field's minimum value
|
||
* @param max Reference to field's maximum value
|
||
*
|
||
* @see elm_datetime_field_limit_set()
|
||
* @ingroup Datetime
|
||
*/
|
||
EAPI void elm_datetime_field_limit_set(Evas_Object *obj, Elm_Datetime_Field_Type fieldtype, int min, int max);
|
||
|
||
/**
|
||
* @brief Get the current value of a field.
|
||
*
|
||
* Year: years since 1900. Negative value represents year below 1900 (year
|
||
* value -30 represents 1870). Year default range is from 70 to 137.
|
||
*
|
||
* Month: default value range is from 0 to 11.
|
||
*
|
||
* Date: default value range is from 1 to 31 according to the month value.
|
||
*
|
||
* Hour: default value will be in terms of 24 hr format (0~23)
|
||
*
|
||
* Minute: default value range is from 0 to 59.
|
||
*
|
||
* @param obj The datetime object.
|
||
* @param currtime Time structure.
|
||
* @return EINA_TRUE if current time is returned successfully.
|
||
*
|
||
* @see elm_datetime_field_value_set()
|
||
* @ingroup Datetime
|
||
*/
|
||
EAPI Eina_Bool elm_datetime_value_get(const Evas_Object *obj, struct tm *currtime);
|
||
|
||
/**
|
||
* @brief Set the current value of a Datetime object.
|
||
*
|
||
* Year: years since 1900. Negative value represents year below 1900 (year
|
||
* value -30 represents 1870). Year default range is from 70 to 137.
|
||
*
|
||
* Month: default value range is from 0 to 11.
|
||
*
|
||
* Date: default value range is from 1 to 31 according to the month value.
|
||
*
|
||
* Hour: default value will be in terms of 24 hr format (0~23)
|
||
*
|
||
* Minute: default value range is from 0 to 59.
|
||
*
|
||
*
|
||
* @param obj The datetime object.
|
||
* @param newtime Time structure filled with values to be set.
|
||
* @return EINA_TRUE if current time is set successfully.
|
||
*
|
||
* @see elm_datetime_value_set()
|
||
* @ingroup Datetime
|
||
*/
|
||
EAPI Eina_Bool elm_datetime_value_set(Evas_Object *obj, const struct tm *newtime);
|
||
|
||
/**
|
||
* @brief Get whether a field can be visible/not
|
||
*
|
||
* @param obj The datetime object
|
||
* @param fieldtype Type of the field. ELM_DATETIME_YEAR etc
|
||
* @return bool @c EINA_TRUE, if field can be visible. @c EINA_FALSE otherwise.
|
||
*
|
||
* @see elm_datetime_field_visible_set()
|
||
* @ingroup Datetime
|
||
*/
|
||
EAPI Eina_Bool elm_datetime_field_visible_get(const Evas_Object *obj, Elm_Datetime_Field_Type fieldtype);
|
||
|
||
/**
|
||
* @brief Set a field to be visible or not.
|
||
* Setting this API True does not ensure that the field is visible, apart from
|
||
* this, the field's format must be present in Datetime overall format.
|
||
* If a field's visibility is set to False then it won't appear even though
|
||
* its format is present in overall format.
|
||
* So if and only if this API is set true and the corresponding field's format
|
||
* is present in Datetime format, the field is visible.
|
||
*
|
||
* By default the field visibility is set to True.
|
||
*
|
||
* @param obj The datetime object
|
||
* @param fieldtype Type of the field. ELM_DATETIME_YEAR etc.
|
||
* @param visible @c EINA_TRUE field can be visible, @c EINA_FALSE otherwise.
|
||
*
|
||
* @see elm_datetime_field_visible_get()
|
||
* @ingroup Datetime
|
||
*/
|
||
EAPI void elm_datetime_field_visible_set(Evas_Object *obj, Elm_Datetime_Field_Type fieldtype, Eina_Bool visible);
|
||
|
||
/**
|
||
* @}
|
||
*/
|