Cdk(3)Cdk(3)NAMEcdk - Curses Development Kit
SYNOPSIS
cc [ flag ... ] file ... -lcdk [ library ... ]
#include <cdk.h>
Cdk provides functions to use a large number of predefined curses wid‐
gets. To use the Cdk widgets the header file cdk.h must be included in
the source.
The widgets available from Cdk are listed below.
Widget Type Manual Page Name
──────────────────────────────────────────────
Alphalist cdk_alphalist (3)
Button cdk_button (3)
Buttonbox cdk_buttonbox (3)
Calendar cdk_calendar (3)
Dialog cdk_dialog (3)
DoubleFloat Scale cdk_dscale (3)
Entry Field cdk_entry (3)
File Selector cdk_fselect (3)
File Viewer cdk_viewer (3)
Floating Scale cdk_fscale (3)
Floating Slider cdk_fslider (3)
Graph cdk_graph (3)
Histogram cdk_histogram (3)
Integer Scale cdk_scale (3)
Integer Slider cdk_slider (3)
Item List cdk_itemlist (3)
Label cdk_label (3)
Marquee cdk_marquee (3)
Matrix cdk_matrix (3)
Multiple Line Entry Field cdk_mentry (3)
Pulldown Menu cdk_menu (3)
Radio List cdk_radio (3)
Scrolling List cdk_scroll (3)
Scrolling Selection List cdk_selection (3)
Scrolling Window cdk_swindow (3)
Template cdk_template (3)
Unsigned Scale cdk_uscale (3)
Unsigned Slider cdk_uslider (3)
The rest of the manual pages describe supporting functions:
Manual Page Name Description
─────────────────────────────────────────────────────────
cdk_binding (3) Outlines how to create user defin‐
able key bindings.
cdk_display (3) Shows how to add special display
attributes, colors, and justifica‐
tion into a widget.
cdk_draw (3) Outlines functions used for drawing
text and lines.
cdk_screen (3) Demonstrates the use of screens
within Cdk.
cdk_misc (3) Outlines miscellaneous functions
provided with the Cdk library.
cdk_process (3) Demonstrates the use of the pre-
and post-process function class.
DESCRIPTION
Cdk is a library of functions which allow a programmer to quickly cre‐
ate a full screen interactive program with ease. The Cdk widgets sup‐
port the following features:
· Ncurses library.
Instead of using the standard curses library, Cdk can take advan‐
tage of the colors that Ncurses provides. To learn how to take
advantage of Cdk's color capabilities, see cdk_display (3).
· Key Bindings.
Individual keys can be overridden with a callback. The callback
is set up using the bindCDKObject function. To learn more about
this see cdk_binding (3).
· Pre and Post Processing.
Certain widgets allow the user to trap a character before and
after the character has been applied to the widget. This allows
programmers to `filter' character input. To learn more about this
see cdk_process (3).
· Self Test Widgets.
With the use of the inject function class and the activate func‐
tion, programmers can have the widgets test themselves. This
allows the programmer to perform automated tests on a final pro‐
gram.
· Special Display Formats
There are special character format commands that can be inserted
into any string in Cdk and the contents will get mapped to a
chtype (see the curses manual page) with character attributes.
This allows the programmer to insert format types on each charac‐
ter if they wish.
· The Ability To Build Predefined Screens
Widgets can be associated to any given screen. If there is more
than one screen defined, then Cdk has the ability to "flip" from
one screen to another with ease. See the cdk_screen manual page
for more details.
STANDARD WIDGET BEHAVIOR
All of the widgets have a member of the structure called exitType.
This member states how the widget exited. There are three values in
which to check for, they are as follows:
┌─────────────────┬─────────────────────────────────────┐
│Value │ Meaning │
├─────────────────┼─────────────────────────────────────┤
├─────────────────┼─────────────────────────────────────┤
│vNORMAL │ This means the widget exited nor‐ │
│ │ mally. This value is set when the │
│ │ widget is given the characters TAB │
│ │ or RETURN. │
├─────────────────┼─────────────────────────────────────┤
│vEARLY_EXIT │ This means the widget exited early. │
│ │ This value is set when characters │
│ │ such as TAB or RETURN are injected │
│ │ into the widget via the injectCD‐ │
│ │ KXXX function and the character │
│ │ injected does not exit the widget. │
├─────────────────┼─────────────────────────────────────┤
│vERROR │ This value states that an error was │
│ │ returned by curses, e.g., if the │
│ │ terminal was disconnected. │
├─────────────────┼─────────────────────────────────────┤
│vESCAPE_HIT │ This value states the user hit │
│ │ ESCAPE to leave the widget. │
├─────────────────┼─────────────────────────────────────┤
│vNEVER_ACTIVATED │ This is the initial state of the │
│ │ value. This means that the widget │
│ │ has not been activated. │
└─────────────────┴─────────────────────────────────────┘
SEE ALSOcdk_binding(3), cdk_display(3), cdk_draw(3), cdk_misc(3),
cdk_process(3), cdk_screen(3)NOTES
The header file <cdk.h> automatically includes the header files
<curses.h>, <stdlib.h>, <string.h>, <ctype.h>, <unistd.h>, <dirent.h>,
<time.h>, <errno.h>, <pwd.h>, <grp.h>, <sys/stat.h>, and <sys/types.h>.
The <curses.h> header file includes <stdio.h> and <unctrl.h>.
Cdk(3)
