DOKK / manpages / debian 10 / libcdk5-dev / setCDKMenuCurrentItem.3.en
cdk_menu(3) Library Functions Manual cdk_menu(3)

cdk_menu - curses menu widget

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

#include <cdk.h>

CDKMENU *menu,
chtype * actions);
CDKMENU *menu);
CDKMENU *menu,
boolean box);
CDKMENU *menu);
CDKMENU *menu);
CDKMENU *menu);
CDKMENU *menu,
int *menuItem,
int *submenuItem);
CDKMENU *menu);
CDKMENU *menu);
CDKMENU *menu,
chtype input);
CDKSCREEN *cdkscreen,
const char *menulist[MAX_MENU_ITEMS][MAX_SUB_ITEMS],
int menuListLength,
int *submenuListLength,
int *menuLocation,
int menuPos,
chtype titleAttribute,
chtype subtitleAttribute);
CDKMENU *menu,
int menuItem,
int submenuItem,
chtype titleAttribute,
chtype subtitleAttribute);
CDKMENU *menu,
chtype attribute);
CDKMENU *menu,
const char * color);
CDKMENU *menu,
int menuItem,
int submenuItem);
CDKMENU *menu,
PROCESSFN callback,
void * data);
CDKMENU *menu,
PROCESSFN callback,
void * data);
CDKMENU *menu,
chtype highlight);
CDKMENU *menu,
chtype highlight);

The Cdk menu widget creates a pull-down menu list. The following are functions which create or manipulate the Cdk menu widget.

activates the menu widget and lets the user interact with the widget.
  • The parameter menu is a pointer to a non-NULL menu widget.
  • If the actions parameter is passed with a non-NULL value, the characters in the array will be 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 then this function returns an integer which is a value of the current menu list * 100 + the sub-menu number. It will also set the widget data exitType to vNORMAL.
If the character entered into this widget was ESCAPE then the widget will return a value of -1 and the widget data exitType will be set to vESCAPE_HIT.
removes the widget from the screen and frees memory the object used.
draws the menu widget on the screen.
If the box parameter is true, the widget is drawn with a box.
draws the menu item subwindow.
removes the widget from the screen. This does NOT destroy the widget.
erases the menu item subwindow.
returns the values menuItem and submenuItem to the current menu selection.
returns the highlight attribute of the sub-menu selection bar.
returns the highlight attributes of the menu title.
injects a single character into the widget.
  • The parameter menu is a pointer to a non-NULL menu 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:
the function returns the current menu list * 100 + the sub-menu number. The widget data exitType is set to vNORMAL.
the function returns -1. to vESCAPE_HIT. The widget data exitType is set to vESCAPE_HIT.
unless modified by preprocessing, postprocessing or key bindings, the function returns -1. The widget data exitType is set to vEARLY_EXIT.
creates a menu widget and returns a pointer to it. Parameters:
is the screen you wish this widget to be placed in.
is a list of the menu list titles.
is the number of pull down menus.
is the number of menu items under each menu list.
tells where each menu is to be located. Valid values are LEFT and RIGHT.
tells whether the menu is to be on the top of the screen or the bottom. Valid values are TOP and BOTTOM.
are the character attributes of the title and sub-titles respectively.
If the widget could not be created then a NULL pointer is returned.
lets the programmer modify certain elements of an existing menu widget.
  • The parameters menuItem and submenuItem set which menu list and sub-menu item are going to be highlighted when the widget is activated.
  • The other parameter names correspond to the same parameter names listed in the newCDKMenu function.
sets the background attribute of the widget.
The parameter attribute is a curses attribute, e.g., A_BOLD.
sets the background color of the widget.
The parameter color is in the format of the Cdk format strings.
See cdk_display (3).
sets the current item in the menu widget.
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).
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).
sets the highlight attribute of the sub-menu selection bar.
sets the highlight attributes of the menu title.

When the widget is activated there are several default key bindings which will help the user enter or manipulate the information quickly. The following table outlines the keys and their actions for this widget.

Key Action
Left Arrow Highlights the menu list to the left of the current menu.
Right Arrow Highlights the menu list to the right of the current menu.
Up Arrow Moves the current menu selection up one.
Down Arrow Moves the current menu selection down one.
Space Moves the current menu selection down one.
Tab Highlights the menu list to the right of the current menu.
Return Exits the widget and returns the index of the selected item. This also sets the widget data exitType to vNORMAL.
Escape Exits the widget and returns -1. This also sets the widget data exitType to vESCAPE_HIT.
Ctrl-L Refreshes the screen.

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