cdk_calendar(3)

📦

version 5.0.20260119 · 4 versions

5.0.20260119 · debian trixie, fedora 43, fedora 44, nixos 26.05, nixpkgs unstable, ubuntu questing, ubuntu resolute, ubuntu stonking (latest)
5.0.20240619 · fedora 43
5.0.20230201 · opensuse-leap 16.0, ubuntu noble
5.0.20180306 · debian bookworm, ubuntu jammy

, in debian trixie, fedora 43, fedora 44, nixos 26.05, nixpkgs unstable, ubuntu questing, ubuntu resolute, ubuntu stonking

💖 NAME 💖

cdk_calendar — Cdk calendar widget. 🗓️✨

Ok so this is cdk_calendar(3), and heads up bestie, this page is a whole trilogy — this is part 1 of 3, so we're not even done yapping yet 💅

🌸 SYNOPSIS 🌸

cc [ flag ... ] file ...  -lcdk [ library ... ]

#include <cdk.h>

time_t activateCDKCalendar (CDKCALENDAR * calendar ,
               chtype *actions);

void destroyCDKCalendar (
               CDKCALENDAR *calendar);

void drawCDKCalendar (CDKCALENDAR * calendar ,
               boolean box);

void eraseCDKCalendar (
               CDKCALENDAR *calendar);

boolean getCDKCalendarBox (
               CDKCALENDAR *calendar);

void getCDKCalendarDate (CDKCALENDAR * calendar ,
               int *day,
               int *month,
               int *year);

chtype getCDKCalendarDayAttribute (
               CDKCALENDAR *calendar);

chtype getCDKCalendarHighlight (
               CDKCALENDAR *calendar);

chtype getCDKCalendarMarker (
               CDKCALENDAR *calendar,
               int day,
               int month,
               int year);

chtype getCDKCalendarMonthAttribute (
               CDKCALENDAR *calendar);

chtype getCDKCalendarYearAttribute (
               CDKCALENDAR *calendar);

time_t injectCDKCalendar (
               CDKCALENDAR *calendar,
               chtype input);

void moveCDKCalendar (
               CDKCALENDAR *calendar,
               int xpos,
               int ypos,
               boolean relative,
               boolean refresh);

CDKCALENDAR *newCDKCalendar (CDKSCREEN * cdkscreen ,
               int xpos,
               int ypos,
               const char *title,
               int day,
               int month,
               int year,
               chtype dayAttrib,
               chtype monthAttrib,
               chtype yearAttrib,
               chtype highlight,
               boolean box,
               boolean shadow);

void positionCDKCalendar (
               CDKCALENDAR *calendar);

void removeCDKCalendarMarker (
               CDKCALENDAR *calendar,
               int day,
               int month,
               int year);

void setCDKCalendar (
               CDKCALENDAR *calendar,
               int day,
               int month,
               int year,
               chtype dayAttrib,
               chtype monthAttrib,
               chtype yearAttrib,
               chtype highlight,
               boolean box);

void setCDKCalendarBackgroundAttrib (
               CDKCALENDAR *calendar,
               chtype attribute);

void setCDKCalendarBackgroundColor (
               CDKCALENDAR *calendar,
               const char * color);

void setCDKCalendarBox (
               CDKCALENDAR *calendar,
               boolean box);

setCDKCalendarBoxAttribute ("
               CDKCALENDAR *calendar,
               chtype ch);

void setCDKCalendarDate (
               CDKCALENDAR *calendar,
               int day,
               int month,
               int year);

void setCDKCalendarDayAttribute (
               CDKCALENDAR *calendar,
               chtype attribute);

void setCDKCalendarDaysNames (
               CDKCALENDAR *calendar,
               const char *days);

void setCDKCalendarHighlight (
               CDKCALENDAR *calendar,
               chtype attribute);

void setCDKCalendarHorizontalChar (
               CDKCALENDAR *calendar,
               chtype ch);

void setCDKCalendarLLChar (
               CDKCALENDAR *calendar,
               chtype ch);

void setCDKCalendarLRChar (
               CDKCALENDAR *calendar,
               chtype ch);

void setCDKCalendarMarker (
               CDKCALENDAR *calendar,
               int day,
               int month,
               int year,
               chtype marker);

void setCDKCalendarMonthAttribute (
               CDKCALENDAR *calendar,
               chtype attribute);

void setCDKCalendarMonthsNames (
               CDKCALENDAR *calendar,
               CDK_CONST char **months);

void setCDKCalendarPostProcess (
               CDKCALENDAR *calendar,
               PROCESSFN callback,
               void * data);

void setCDKCalendarPreProcess (
               CDKCALENDAR *calendar,
               PROCESSFN callback,
               void * data);

setCDKCalendarULChar ("
               CDKCALENDAR *calendar,
               chtype ch);

setCDKCalendarURChar ("
               CDKCALENDAR *calendar,
               chtype ch);

setCDKCalendarVerticalChar ("
               CDKCALENDAR *calendar,
               chtype ch);

void setCDKCalendarYearAttribute (
               CDKCALENDAR *calendar,
               chtype attribute);

🦋 DESCRIPTION 🦋

So like, the Cdk calendar widget creates a pop-up calendar — yes, a whole lil calendar that pops up in your terminal, we love a dramatic entrance 🎀

And the calendar widget lets the user traverse through months/years using the cursor keys. That's the whole vibe: hit the arrows, glide through time, main character energy fr fr ⭐👑

stay tuned bestie, there's more of this page coming 💜

✨ AVAILABLE FUNCTIONS ✨

Bestie, this is the function menu. Every single one, all the details, zero skips. 💖

💅 `activateCDKCalendar`

activates the calendar widget and lets the user actually interact with it. Iconic.

The calendar widget is a pointer to a non-NULL calendar widget.
If the actions parameter is passed with a non-NULL value, the characters in the array get injected into the widget.
- To activate the widget interactively, pass in a NULL pointer for actions.
- If the character entered into this widget is RETURN, then this function returns a type of time_t.
The time_t type is used in the functions defined in the time.h header file. (see localtime or ctime for more info, iykyk).

If the character entered into this widget was ESCAPE or TAB, then this function returns a value of (time_t)-1 and the widget data exitType gets set to vESCAPE_HIT. 💀

💖 `destroyCDKCalendar`

removes the widget from the screen and frees memory the object used. Bye babe.

🎀 `drawCDKCalendar`

draws the label widget on the screen.

If the box parameter is true, the widget is drawn with a box. 📦

🦋 `eraseCDKCalendar`

removes the widget from the screen. This does NOT destroy the widget. It's giving ghosting but not breakup.

🌸 `getCDKCalendarBox`

returns whether the widget will be drawn with a box around it.

💜 `getCDKCalendarDate`

returns the current date the calendar is displaying.

⭐ `getCDKCalendarDayAttribute`

returns the attribute of the day attribute of the calendar.

👑 `getCDKCalendarHighlight`

returns the attribute of the highlight bar of the scrolling list portion of the widget.

🔥 `getCDKCalendarMarker`

returns the marker set on the calendar by setCDKCalendarMarker.

🌈 `getCDKCalendarMonthAttribute`

returns the attribute of the month attribute of the calendar.

✨ `getCDKCalendarYearAttribute`

returns the attribute of the year attribute of the calendar.

💀 `injectCDKCalendar`

injects a single character into the widget.

The parameter calendar is a pointer to a non-NULL calendar widget.
The parameter character is the character to inject into the widget.

The return value and side-effect (setting the widget data exitType) depend upon the injected character:

RETURN or TAB — the function returns a value of type time_t (see localtime or ctime for more information). The widget data exitType is set to vNORMAL.
ESCAPE — the function returns (time_t)-1. The widget data exitType is set to vESCAPE_HIT.
Otherwise — unless modified by preprocessing, postprocessing or key bindings, the function returns (time_t)-1. The widget data exitType is set to vEARLY_EXIT.

🧚 `moveCDKCalendar`

moves the given widget to the given position.

The parameters xpos and ypos are the new position of the widget.
- The parameter xpos may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER.
- The parameter ypos may be an integer, or one of the pre-defined values LEFT, RIGHT, and CENTER.
The parameter relative states whether the xpos/ypos pair is a relative move or an absolute move.
- For example, if xpos = 1 and ypos = 2 and relative = TRUE, then the widget would move one row down and two columns right. If the value of relative was FALSE, then the widget would move to the position (1,2).
- Do not use the values TOP, BOTTOM, LEFT, RIGHT, or CENTER when relative = TRUE. (weird things may happen). 🙈
The final parameter refresh is a boolean value which states whether the widget will get refreshed after the move.

🍓 `newCDKCalendar`

creates a calendar widget and returns a pointer to it. Parameters:

screen — is the screen you wish this widget to be placed in.
xpos — controls the placement of the object along the horizontal axis. It may be an integer or one of the pre-defined values LEFT, RIGHT, and CENTER.
ypos — controls the placement of the object along the vertical axis. It may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER.
title — is the string which will be displayed at the top of the widget. The title can be more than one line; just provide a carriage return character at the line break.
year, month and day — set the initial date of the calendar.
yearAttrib, monthAttrib and dayAttrib — represent the attributes of the year, month, and day respectively.
highlight — sets the highlight of the currently selected day.
box — is true if the widget should be drawn with a box around it.
shadow — turns the shadow on or off around this widget.

If the widget could not be created then a NULL pointer is returned. 😭

🌟 `positionCDKCalendar`

allows the user to move the widget around the screen via the cursor/keypad keys. See cdk_position (3) for key bindings.

💫 `removeCDKCalendarMarker`

removes a marker from the calendar.

🫶 `setCDKCalendar`

lets the programmer modify certain elements of an existing calendar widget.

The calendar parameter represents an existing calendar pointer.
The other parameter names correspond to the same parameter names listed in the newCDKCalendar function.

💖 `setCDKCalendarBackgroundAttrib`

sets the background attribute of the widget.

The parameter attribute is a curses attribute, e.g., A_BOLD.

🌈 `setCDKCalendarBackgroundColor`

sets the background color of the widget.

The parameter color is in the format of the Cdk format strings.

See cdk_display (3).

✨ `setCDKCalendarBox`

sets whether the widget will be drawn with a box around it.

🎀 `setCDKCalendarBoxAttribute`

sets the attribute of the box.

🦋 `setCDKCalendarDate`

sets the calendar to the given date.

If the value of the day, month, or year parameters is -1 then the current day, month, or year is used to set the date.

💜 `setCDKCalendarDayAttribute`

sets the attribute of the day in the calendar.

⭐ `setCDKCalendarDaysNames`

sets the names of the days of the week.

The parameter is a string listing the 2-character abbreviations for the days.

The default value is "Su Mo Tu We Th Fr Sa"

"Su" (Sunday) is numbered zero internally, making it by default the first day of the week. Set the weekBase member of the widget to select a different day. For example, Monday would be 1, Tuesday 2, etc.

👑 `setCDKCalendarHighlight`

sets the attribute of the highlight bar of the scrolling list portion of the widget.

🔥 `setCDKCalendarHorizontalChar`

sets the horizontal drawing character for the box to the given character.

🌸 `setCDKCalendarLLChar`

sets the lower left hand corner of the widget's box to the given character.

🌟 `setCDKCalendarLRChar`

sets the lower right hand corner of the widget's box to the given character.

💫 `setCDKCalendarMarker`

allows the user to set a marker which will be displayed when the month is drawn.

The marker parameter is the attribute to use when drawing the marker. If more than one marker is set on a single day, then the day will blink with the original marker attribute. 👀

🫶 `setCDKCalendarMonthAttribute`

sets the attribute of the month in the calendar.

💖 `setCDKCalendarMonthsNames`

sets the names of the months of the year.

The parameter is a 13-element array (since indexing starts with 1).

The default values are the English month names, e.g., "January".

🌈 `setCDKCalendarPostProcess`

allows the user to have the widget call a function after the key has been applied to the widget.

The parameter function is the callback function.
The parameter data points to data passed to the callback function.

To learn more about post-processing see cdk_process(3).

✨ `setCDKCalendarPreProcess`

allows the user to have the widget call a function after a key is hit and before the key is applied to the widget.

The parameter function is the callback function.
The parameter data points to data passed to the callback function.

To learn more about pre-processing see cdk_process(3).

🎀 `setCDKCalendarULChar`

sets the upper left hand corner of the widget's box to the given character.

🦋 `setCDKCalendarURChar`

sets the upper right hand corner of the widget's box to the given character.

💜 `setCDKCalendarVerticalChar`

sets the vertical drawing character for the box to the given character.

⭐ `setCDKCalendarYearAttribute`

sets the attribute of the year in the calendar.

✨ KEY BINDINGS ✨

okay bestie, when the widget is activated there are several default key bindings that help you enter or manipulate the info quickly. it's giving calendar main character energy, ngl. here's the whole key tea for this widget, no cap:

Left Arrow — moves the cursor to the previous day. ⬅️
Right Arrow — moves the cursor to the next day. ➡️
Up Arrow — moves the cursor to the next week. ⬆️
Down Arrow — moves the cursor to the previous week. ⬇️
t — sets the calendar to the current date. 📅
T — sets the calendar to the current date. 📅 (yes, same vibe as lowercase t, iconic)
n — advances the calendar one month ahead. ✨
N — advances the calendar six months ahead. ✨✨
p — advances the calendar one month back. 🦋
P — advances the calendar six months back. 🦋🦋
- — advances the calendar one year ahead. 🍓
+ — advances the calendar one year back. 🍓 (yes, the signs are doing their own thing, just go with it)
Return — exits the widget and returns a value of time_t which represents the day selected at 1 second after midnight. this also sets the widget data exitType to vNORMAL. 👑
Tab — exits the widget and returns a value of time_t which represents the day selected at 1 second after midnight. this also sets the widget data exitType to vNORMAL. 👑 (same energy as Return, fr fr)
Escape — exits the widget and returns (time_)-1. this also sets the widget data exitType to vESCAPE_HIT. 😭
Ctrl-L — refreshes the screen. 🔄

lowkey important: Escape gives you (time_)-1 and flips exitType to vESCAPE_HIT, so don't be surprised when it bails like that. 💀

👀 SEE ALSO 👀

if you're feeling nosy and wanna read more, go peep these besties — they slay: cdk(3), cdk_binding(3), cdk_display(3), cdk_position(3), cdk_screen(3). 🫶 iykyk.

okay that's the whole page for cdk_calendar(3), dated 2025-01-14 — periodt, mwah 💅✨

📦 where this page comes from

debian trixie: libcdk5-dev 5.0.20250116-1 · BSD-4-Clause
fedora 43: cdk 5.0.20251014-1.fc43 · X11-distribute-modifications-variant
fedora 43: cdk 5.0.20251014-1.fc43 · X11-distribute-modifications-variant
fedora 44: cdk 5.0.20251014-3.fc44 · X11-distribute-modifications-variant
fedora 44: cdk 5.0.20251014-3.fc44 · X11-distribute-modifications-variant
nixos 26.05: cdk 5.0-20260119
nixpkgs unstable: cdk 5.0-20260119
ubuntu questing: libcdk5-dev 5.0.20250116-1
ubuntu resolute: libcdk5-dev 5.0.20251014-1 · BSD-4-Clause
ubuntu stonking: libcdk5-dev 5.0.20260119-1 · BSD-4-Clause
💖 girlified by deepseek-ai/DeepSeek-V4.1-Flash on 2026-10-14: a language model's rewrite of the original, under its terms

cdk_calendar(3)

💖 NAME 💖

🌸 SYNOPSIS 🌸

🦋 DESCRIPTION 🦋

✨ AVAILABLE FUNCTIONS ✨

💅 activateCDKCalendar

💖 destroyCDKCalendar

🎀 drawCDKCalendar

🦋 eraseCDKCalendar

🌸 getCDKCalendarBox

💜 getCDKCalendarDate

⭐ getCDKCalendarDayAttribute

👑 getCDKCalendarHighlight

🔥 getCDKCalendarMarker

🌈 getCDKCalendarMonthAttribute

✨ getCDKCalendarYearAttribute

💀 injectCDKCalendar

🧚 moveCDKCalendar

🍓 newCDKCalendar

🌟 positionCDKCalendar

💫 removeCDKCalendarMarker

🫶 setCDKCalendar

💖 setCDKCalendarBackgroundAttrib

🌈 setCDKCalendarBackgroundColor

✨ setCDKCalendarBox

🎀 setCDKCalendarBoxAttribute

🦋 setCDKCalendarDate

💜 setCDKCalendarDayAttribute

⭐ setCDKCalendarDaysNames

👑 setCDKCalendarHighlight

🔥 setCDKCalendarHorizontalChar

🌸 setCDKCalendarLLChar

🌟 setCDKCalendarLRChar

💫 setCDKCalendarMarker

🫶 setCDKCalendarMonthAttribute

💖 setCDKCalendarMonthsNames

🌈 setCDKCalendarPostProcess

✨ setCDKCalendarPreProcess

🎀 setCDKCalendarULChar

🦋 setCDKCalendarURChar

💜 setCDKCalendarVerticalChar

⭐ setCDKCalendarYearAttribute