## GtkCalendar GtkCalendar — Displays a calendar and allows the user to select a date |

## Synopsis

    #include <gtk/gtk.h>

    struct              GtkCalendar;
    gchar *             (*GtkCalendarDetailFunc)            (GtkCalendar *calendar,
                                                             guint year,
                                                             guint month,
                                                             guint day,
                                                             gpointer user_data);
    enum                GtkCalendarDisplayOptions;

    GtkWidget *         gtk_calendar_new                    (void);
    void                gtk_calendar_select_month           (GtkCalendar *calendar,
                                                             guint month,
                                                             guint year);
    void                gtk_calendar_select_day             (GtkCalendar *calendar,
                                                             guint day);
    void                gtk_calendar_mark_day               (GtkCalendar *calendar,
                                                             guint day);
    void                gtk_calendar_unmark_day             (GtkCalendar *calendar,
                                                             guint day);
    gboolean            gtk_calendar_get_day_is_marked      (GtkCalendar *calendar,
                                                             guint day);
    void                gtk_calendar_clear_marks            (GtkCalendar *calendar);

    GtkCalendarDisplayOptions gtk_calendar_get_display_options
                                                            (GtkCalendar *calendar);
    void                gtk_calendar_set_display_options    (GtkCalendar *calendar,
                                                             GtkCalendarDisplayOptions flags);
    void                gtk_calendar_get_date               (GtkCalendar *calendar,
                                                             guint *year,
                                                             guint *month,
                                                             guint *day);

    void                gtk_calendar_set_detail_func        (GtkCalendar *calendar,
                                                             GtkCalendarDetailFunc func,
                                                             gpointer data,
                                                             GDestroyNotify destroy);
    gint                gtk_calendar_get_detail_width_chars (GtkCalendar *calendar);
    void                gtk_calendar_set_detail_width_chars (GtkCalendar *calendar,
                                                             gint chars);
    gint                gtk_calendar_get_detail_height_rows (GtkCalendar *calendar);
    void                gtk_calendar_set_detail_height_rows (GtkCalendar *calendar,
                                                             gint rows);

## Object Hierarchy

      GObject
       +----GInitiallyUnowned
             +----GtkWidget
                   +----GtkCalendar

## Implemented Interfaces

GtkCalendar implements AtkImplementorIface and GtkBuildable.

## Properties

      "day"                      gint                  : Read / Write
      "detail-height-rows"       gint                  : Read / Write
      "detail-width-chars"       gint                  : Read / Write
      "month"                    gint                  : Read / Write
      "no-month-change"          gboolean              : Read / Write
      "show-day-names"           gboolean              : Read / Write
      "show-details"             gboolean              : Read / Write
      "show-heading"             gboolean              : Read / Write
      "show-week-numbers"        gboolean              : Read / Write
      "year"                     gint                  : Read / Write

## Style Properties

      "horizontal-separation"    gint                  : Read
      "inner-border"             gint                  : Read
      "vertical-separation"      gint                  : Read

## Signals

      "day-selected"                                   : Run First
      "day-selected-double-click"                      : Run First
      "month-changed"                                  : Run First
      "next-month"                                     : Run First
      "next-year"                                      : Run First
      "prev-month"                                     : Run First
      "prev-year"                                      : Run First

## Description

GtkCalendar is a widget that displays a Gregorian calendar, one month at a time. It can be created with `gtk_calendar_new()`.

The month and year currently displayed can be altered with `gtk_calendar_select_month()`. The exact day can be selected from the displayed month using `gtk_calendar_select_day()`.

To place a visual marker on a particular day, use `gtk_calendar_mark_day()` and to remove the marker, `gtk_calendar_unmark_day()`. Alternative, all marks can be cleared with `gtk_calendar_clear_marks()`.

The way in which the calendar itself is displayed can be altered using `gtk_calendar_set_display_options()`.

The selected date can be retrieved from a GtkCalendar using `gtk_calendar_get_date()`.

Users should be aware that, although the Gregorian calendar is the legal calendar in most countries, it was adopted progressively between 1582 and 1929. Display before these dates is likely to be historically incorrect.

## Details

### struct GtkCalendar

    struct GtkCalendar;

### GtkCalendarDetailFunc ()

    gchar *             (*GtkCalendarDetailFunc)            (GtkCalendar *calendar,
                                                             guint year,
                                                             guint month,
                                                             guint day,
                                                             gpointer user_data);

This kind of functions provide Pango markup with detail information for the specified day. Examples for such details are holidays or appointments. The function returns `NULL` when no information is available.

`calendar` : | a GtkCalendar.
`year` : | the year for which details are needed.
`month` : | the month for which details are needed.
`day` : | the day of `month` for which details are needed.
`user_data` : | the data passed with `gtk_calendar_set_detail_func()`.
Returns : | Newly allocated string with Pango markup with details for the specified day, or `NULL`.

Since 2.14

### enum GtkCalendarDisplayOptions

    typedef enum {
      GTK_CALENDAR_SHOW_HEADING		= 1 << 0,
      GTK_CALENDAR_SHOW_DAY_NAMES		= 1 << 1,
      GTK_CALENDAR_NO_MONTH_CHANGE		= 1 << 2,
      GTK_CALENDAR_SHOW_WEEK_NUMBERS = 1 << 3,
      GTK_CALENDAR_SHOW_DETAILS		= 1 << 5
    } GtkCalendarDisplayOptions;

These options can be used to influence the display and behaviour of a GtkCalendar.

`GTK_CALENDAR_SHOW_HEADING` | Specifies that the month and year should be displayed.
`GTK_CALENDAR_SHOW_DAY_NAMES` | Specifies that three letter day descriptions should be present.
`GTK_CALENDAR_NO_MONTH_CHANGE` | Prevents the user from switching months with the calendar.
`GTK_CALENDAR_SHOW_WEEK_NUMBERS` | Displays each week numbers of the current year, down the left side of the calendar.
`GTK_CALENDAR_SHOW_DETAILS` | Just show an indicator, not the full details text when details are provided. See `gtk_calendar_set_detail_func()`.

### gtk_calendar_new ()

    GtkWidget *         gtk_calendar_new                    (void);

Creates a new calendar, with the current date being selected.

Returns : | a newly GtkCalendar widget

### gtk_calendar_select_month ()

    void                gtk_calendar_select_month           (GtkCalendar *calendar,
                                                             guint month,
                                                             guint year);

Shifts the calendar to a different month.

`calendar` : | a GtkCalendar
`month` : | a month number between 0 and 11.
`year` : | the year the month is in.

### gtk_calendar_select_day ()

    void                gtk_calendar_select_day             (GtkCalendar *calendar,
                                                             guint day);

Selects a day from the current month.

`calendar` : | a GtkCalendar.
`day` : | the day number between 1 and 31, or 0 to unselect the currently selected day.

### gtk_calendar_mark_day ()

    void                gtk_calendar_mark_day               (GtkCalendar *calendar,
                                                             guint day);

Places a visual marker on a particular day.

`calendar` : | a GtkCalendar
`day` : | the day number to mark between 1 and 31.

### gtk_calendar_unmark_day ()

    void                gtk_calendar_unmark_day             (GtkCalendar *calendar,
                                                             guint day);

Removes the visual marker from a particular day.

`calendar` : | a GtkCalendar.
`day` : | the day number to unmark between 1 and 31.

### gtk_calendar_get_day_is_marked ()

    gboolean            gtk_calendar_get_day_is_marked      (GtkCalendar *calendar,
                                                             guint day);

Returns if the `day` of the `calendar` is already marked.

`calendar` : | a GtkCalendar
`day` : | the day number between 1 and 31.
Returns : | whether the day is marked.

Since 3.0

### gtk_calendar_clear_marks ()

    void                gtk_calendar_clear_marks            (GtkCalendar *calendar);

Remove all visual markers.

`calendar` : | a GtkCalendar

### gtk_calendar_get_display_options ()

    GtkCalendarDisplayOptions gtk_calendar_get_display_options
                                                            (GtkCalendar *calendar);

Returns the current display options of `calendar`.

`calendar` : | a GtkCalendar
Returns : | the display options.

Since 2.4

### gtk_calendar_set_display_options ()

    void                gtk_calendar_set_display_options    (GtkCalendar *calendar,
                                                             GtkCalendarDisplayOptions flags);

Sets display options (whether to display the heading and the month headings).

`calendar` : | a GtkCalendar
`flags` : | the display options to set

Since 2.4

### gtk_calendar_get_date ()

    void                gtk_calendar_get_date               (GtkCalendar *calendar,
                                                             guint *year,
                                                             guint *month,
                                                             guint *day);

Obtains the selected date from a GtkCalendar.

`calendar` : | a GtkCalendar
`year` : | location to store the year as a decimal number (e.g. 2011), or `NULL`. [out][allow-none]
`month` : | location to store the month number (between 0 and 11), or `NULL`. [out][allow-none]
`day` : | location to store the day number (between 1 and 31), or `NULL`. [out][allow-none]

### gtk_calendar_set_detail_func ()

    void                gtk_calendar_set_detail_func        (GtkCalendar *calendar,
                                                             GtkCalendarDetailFunc func,
                                                             gpointer data,
                                                             GDestroyNotify destroy);

Installs a function which provides Pango markup with detail information for each day. Examples for such details are holidays or appointments. That information is shown below each day when "show-details" is set. A tooltip containing with full detail information is provided, if the entire text should not fit into the details area, or if "show-details" is not set.

The size of the details area can be restricted by setting the "detail-width-chars" and "detail-height-rows" properties.

`calendar` : | a GtkCalendar.
`func` : | a function providing details for each day.
`data` : | data to pass to `func` invokations.
`destroy` : | a function for releasing `data`.

Since 2.14

### gtk_calendar_get_detail_width_chars ()

    gint                gtk_calendar_get_detail_width_chars (GtkCalendar *calendar);

Queries the width of detail cells, in characters. See "detail-width-chars".

`calendar` : | a GtkCalendar.
Returns : | The width of detail cells, in characters.

Since 2.14

### gtk_calendar_set_detail_width_chars ()

    void                gtk_calendar_set_detail_width_chars (GtkCalendar *calendar,
                                                             gint chars);

Updates the width of detail cells. See "detail-width-chars".

`calendar` : | a GtkCalendar.
`chars` : | detail width in characters.

Since 2.14

### gtk_calendar_get_detail_height_rows ()

    gint                gtk_calendar_get_detail_height_rows (GtkCalendar *calendar);

Queries the height of detail cells, in rows. See "detail-width-chars".

`calendar` : | a GtkCalendar.
Returns : | The height of detail cells, in rows.

Since 2.14

### gtk_calendar_set_detail_height_rows ()

    void                gtk_calendar_set_detail_height_rows (GtkCalendar *calendar,
                                                             gint rows);

Updates the height of detail cells. See "detail-height-rows".

`calendar` : | a GtkCalendar.
`rows` : | detail height in rows.

Since 2.14

## Property Details

### The `"day"` property

      "day"                      gint                  : Read / Write

The selected day (as a number between 1 and 31, or 0 to unselect the currently selected day). This property gets initially set to the current day.

Allowed values: [0,31]

Default value: 0

### The `"detail-height-rows"` property

      "detail-height-rows"       gint                  : Read / Write

Height of a detail cell, in rows. A value of 0 allows any width. See `gtk_calendar_set_detail_func()`.

Allowed values: [0,127]

Default value: 0

Since 2.14

### The `"detail-width-chars"` property

      "detail-width-chars"       gint                  : Read / Write

Width of a detail cell, in characters. A value of 0 allows any width. See `gtk_calendar_set_detail_func()`.

Allowed values: [0,127]

Default value: 0

Since 2.14

### The `"month"` property

      "month"                    gint                  : Read / Write

The selected month (as a number between 0 and 11). This property gets initially set to the current month.

Allowed values: [0,11]

Default value: 0

### The `"no-month-change"` property

      "no-month-change"          gboolean              : Read / Write

Determines whether the selected month can be changed.

Default value: FALSE

Since 2.4

### The `"show-day-names"` property

      "show-day-names"           gboolean              : Read / Write

Determines whether day names are displayed.

Default value: TRUE

Since 2.4

### The `"show-details"` property

      "show-details"             gboolean              : Read / Write

Determines whether details are shown directly in the widget, or if they are available only as tooltip. When this property is set days with details are marked.

Default value: TRUE

Since 2.14

### The `"show-heading"` property

      "show-heading"             gboolean              : Read / Write

Determines whether a heading is displayed.

Default value: TRUE

Since 2.4

### The `"show-week-numbers"` property

      "show-week-numbers"        gboolean              : Read / Write

Determines whether week numbers are displayed.

Default value: FALSE

Since 2.4

### The `"year"` property

      "year"                     gint                  : Read / Write

The selected year. This property gets initially set to the current year.

Allowed values: [0,4194303]

Default value: 0

## Style Property Details

### The `"horizontal-separation"` style property

      "horizontal-separation"    gint                  : Read

Separation between week headers and main area.

Allowed values: >= 0

Default value: 4

### The `"inner-border"` style property

      "inner-border"             gint                  : Read

The spacing around the day/week headers and main area.

Allowed values: >= 0

Default value: 4

### The `"vertical-separation"` style property

      "vertical-separation"      gint                  : Read

Space between day headers and main area.

Allowed values: >= 0

Default value: 4

## Signal Details

### The `"day-selected"` signal

    void                user_function                      (GtkCalendar *calendar,
                                                            gpointer     user_data)      : Run First

Emitted when the user selects a day.

`calendar` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The `"day-selected-double-click"` signal

    void                user_function                      (GtkCalendar *calendar,
                                                            gpointer     user_data)      : Run First

Emitted when the user double-clicks a day.

`calendar` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The `"month-changed"` signal

    void                user_function                      (GtkCalendar *calendar,
                                                            gpointer     user_data)      : Run First

Emitted when the user clicks a button to change the selected month on a calendar.

`calendar` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The `"next-month"` signal

    void                user_function                      (GtkCalendar *calendar,
                                                            gpointer     user_data)      : Run First

Emitted when the user switched to the next month.

`calendar` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The `"next-year"` signal

    void                user_function                      (GtkCalendar *calendar,
                                                            gpointer     user_data)      : Run First

Emitted when user switched to the next year.

`calendar` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The `"prev-month"` signal

    void                user_function                      (GtkCalendar *calendar,
                                                            gpointer     user_data)      : Run First

Emitted when the user switched to the previous month.

`calendar` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The `"prev-year"` signal

    void                user_function                      (GtkCalendar *calendar,
                                                            gpointer     user_data)      : Run First

Emitted when user switched to the previous year.

`calendar` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.