## GtkCalendar

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

## Functions

gchar * | (*GtkCalendarDetailFunc) ()
GtkWidget * | gtk_calendar_new ()
void | gtk_calendar_select_month ()
void | gtk_calendar_select_day ()
void | gtk_calendar_mark_day ()
void | gtk_calendar_unmark_day ()
gboolean | gtk_calendar_get_day_is_marked ()
void | gtk_calendar_clear_marks ()
GtkCalendarDisplayOptions | gtk_calendar_get_display_options ()
void | gtk_calendar_set_display_options ()
void | gtk_calendar_get_date ()
void | gtk_calendar_set_detail_func ()
gint | gtk_calendar_get_detail_width_chars ()
void | gtk_calendar_set_detail_width_chars ()
gint | gtk_calendar_get_detail_height_rows ()
void | gtk_calendar_set_detail_height_rows ()

## Properties

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

## Style Properties

gint | horizontal-separation | Read
gint | inner-border | Read
gint | vertical-separation | Read

## Signals

void | day-selected | Run First
void | day-selected-double-click | Run First
void | month-changed | Run First
void | next-month | Run First
void | next-year | Run First
void | prev-month | Run First
void | prev-year | Run First

## Types and Values

struct | GtkCalendar
enum | GtkCalendarDisplayOptions

## Object Hierarchy

        GObject
        ╰── GInitiallyUnowned
            ╰── GtkWidget
                ╰── GtkCalendar

## Implemented Interfaces

GtkCalendar implements AtkImplementorIface and GtkBuildable.

## Includes

    #include <gtk/gtk.h>

## 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.

## Functions

### 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.

#### Parameters

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

### 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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

calendar | a GtkCalendar |

### gtk_calendar_get_display_options ()

    GtkCalendarDisplayOptions
    gtk_calendar_get_display_options (GtkCalendar *calendar);

Returns the current display options of `calendar` .

#### Parameters

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).

#### Parameters

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.

#### Parameters

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.

#### Parameters

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”.

#### Parameters

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”.

#### Parameters

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”.

#### Parameters

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”.

#### Parameters

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

Since: 2.14

## Types and Values

### struct GtkCalendar

    struct GtkCalendar;

### enum GtkCalendarDisplayOptions

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

#### Members

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()`. |

## Property Details

### The `“day”` property

      “day”                      gint

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.

Flags: Read / Write

Allowed values: [0,31]

Default value: 0

### The `“detail-height-rows”` property

      “detail-height-rows”       gint

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

Flags: Read / Write

Allowed values: [0,127]

Default value: 0

Since: 2.14

### The `“detail-width-chars”` property

      “detail-width-chars”       gint

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

Flags: Read / Write

Allowed values: [0,127]

Default value: 0

Since: 2.14

### The `“month”` property

      “month”                    gint

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

Flags: Read / Write

Allowed values: [0,11]

Default value: 0

### The `“no-month-change”` property

      “no-month-change”          gboolean

Determines whether the selected month can be changed.

Flags: Read / Write

Default value: FALSE

Since: 2.4

### The `“show-day-names”` property

      “show-day-names”           gboolean

Determines whether day names are displayed.

Flags: Read / Write

Default value: TRUE

Since: 2.4

### The `“show-details”` property

      “show-details”             gboolean

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.

Flags: Read / Write

Default value: TRUE

Since: 2.14

### The `“show-heading”` property

      “show-heading”             gboolean

Determines whether a heading is displayed.

Flags: Read / Write

Default value: TRUE

Since: 2.4

### The `“show-week-numbers”` property

      “show-week-numbers”        gboolean

Determines whether week numbers are displayed.

Flags: Read / Write

Default value: FALSE

Since: 2.4

### The `“year”` property

      “year”                     gint

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

Flags: Read / Write

Allowed values: [0,4194303]

Default value: 0

## Style Property Details

### The `“horizontal-separation”` style property

      “horizontal-separation”    gint

Separation between week headers and main area.

Flags: Read

Allowed values: >= 0

Default value: 4

### The `“inner-border”` style property

      “inner-border”             gint

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

Flags: Read

Allowed values: >= 0

Default value: 4

### The `“vertical-separation”` style property

      “vertical-separation”      gint

Space between day headers and main area.

Flags: Read

Allowed values: >= 0

Default value: 4

## Signal Details

### The `“day-selected”` signal

    void
    user_function (GtkCalendar *calendar,
                   gpointer     user_data)

Emitted when the user selects a day.

#### Parameters

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

Flags: Run First

### The `“day-selected-double-click”` signal

    void
    user_function (GtkCalendar *calendar,
                   gpointer     user_data)

Emitted when the user double-clicks a day.

#### Parameters

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

Flags: Run First

### The `“month-changed”` signal

    void
    user_function (GtkCalendar *calendar,
                   gpointer     user_data)

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

#### Parameters

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

Flags: Run First

### The `“next-month”` signal

    void
    user_function (GtkCalendar *calendar,
                   gpointer     user_data)

Emitted when the user switched to the next month.

#### Parameters

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

Flags: Run First

### The `“next-year”` signal

    void
    user_function (GtkCalendar *calendar,
                   gpointer     user_data)

Emitted when user switched to the next year.

#### Parameters

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

Flags: Run First

### The `“prev-month”` signal

    void
    user_function (GtkCalendar *calendar,
                   gpointer     user_data)

Emitted when the user switched to the previous month.

#### Parameters

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

Flags: Run First

### The `“prev-year”` signal

    void
    user_function (GtkCalendar *calendar,
                   gpointer     user_data)

Emitted when user switched to the previous year.

#### Parameters

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

Flags: Run First