initCDKScreen, initCDKColor, registerCDKObject, unregisterCDKObject, raiseCDKObject, lowerCDKObject, refreshCDKScreen, eraseCDKScreen, destroyCDKScreen, endCDK - Cdk Screen and Widget Manipulation Functions

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

#include <cdk.h>

CDKSCREEN *initCDKScreen (WINDOW *cursesWindow );

void initCDKColor ();

void registerCDKObject (CDKSCREEN *screen , EObjectType widgetType , void *object);

void unregisterCDKObject(EObjectType widgetType , void *object);

void raiseCDKObject(EObjectType widgetType , void *object);

void lowerCDKObject(EObjectType widgetType , void *object);

void refreshCDKScreen(CDKSCREEN *screen);

void eraseCDKScreen(CDKSCREEN *screen);

void destroyCDKScreen(CDKSCREEN *screen);

void endCDK();

One of the features of Cdk is that it will manage all of the widgets for you. These functions perform some of the management of the widgets in a screen. The following outline each function and it's purpose.

CDKSCREEN *initCDKScreen (WINDOW *cursesWindow); This function takes a WINDOW * (cursesWindow) and returns a pointer to a CDKSCREEN *. Since all of the widgets take a CDKSCREEN pointer as a first argument, this is also one of the first calls made. This also starts curses, so no curses initialization calls have to be made when using Cdk.

void initCDKColor (); This call starts the Cdk color capabilities. It defines 64 color pairs each of which is accessible using the COLOR_PAIR macro. If you do not have color support, this function call makes no difference.

void registerCDKObject (CDKSCREEN *screen, EObjectType widgetType, void *object); This function is called automatically when a widget is created. If for some reason an object does get unregistered, by calling unregisterCDKObject, the widget can be registered again by calling this function. The widgetType parameter states what Cdk widget type this object is. The object parameter is a void pointer to the object.

void unregisterCDKObject (EObjectType cdktype, void *object); This function removes the widget from the screen. This does NOT destroy the object, it removes the widget from any further refreshes by the function refreshCDKScreen. The widgetType parameter states what Cdk widget type this object is. The object parameter is a void pointer to the object.

void raiseCDKObject (EObjectType cdktype, void *object); This function raises the widget to the top of the screen. If there are any widgets which overlap the given object when a refresh is done, calling this function has the effect of raiding the object so no other widgets obstruct it. The widgetType parameter states what Cdk widget type this object is. The object parameter is a void pointer to the object.

void lowerCDKObject (EObjectType cdktype, void *object); This function has the opposite effect of the raiseCDKObject function call.

void refreshCDKScreen (CDKSCREEN *screen); This function redraws all of the widgets which are currently associated to the given screen.

void eraseCDKScreen (CDKSCREEN *screen); This function erases all of the widgets which are currently associated to the given screen. This does NOT destroy the widgets.

void destroyCDKScreen (CDKSCREEN *screen); This function destroys any memory allocated by the Cdk screen pointer.

void endCDK(); This function cleans up any memory created by starting Cdk and shuts down curses.

cdk(3), cdk_binding(3), cdk_display(3)

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>.

If you have Ncurses installed on your machine add -DNCURSES to the compile line to include the Ncurses header files instead.