cdk_menu(3)

NAME
activateCDKMenu, destroyCDKMenu, drawCDKMenu, eraseCDKMenu, getCDKMenuCurrentItem, getCDKMenuCurrentItem, getCDKMenuSubTitleHighlight, getCDKMenuTitleHighlight, getCDKMenuTitleHighlight, injectCDKMenu, newCDKMenu, setCDKMenu, setCDKMenuCurrentItem, setCDKMenuPostProcess, setCDKMenuPreProcess, setCDKMenuSubTitleHighlight, setCDKMenuTitleHighlight - curses menu widget

SYNOPSIS

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

#include <cdk/cdk.h>

int activateCDKMenu (
    CDKMENU *menu,
    chtype * actions);

void destroyCDKMenu (
    CDKMENU *menu);

void drawCDKMenu (
    CDKMENU *menu,
    boolean box);

void eraseCDKMenu (
    CDKMENU *menu);

void getCDKMenuCurrentItem (
    CDKMENU *menu,
    int *menuItem,
    int *submenuItem);

chtype getCDKMenuSubTitleHighlight (
    CDKMENU *menu);

chtype getCDKMenuTitleHighlight (
    CDKMENU *menu);

int injectCDKMenu (
    CDKMENU *menu,
    chtype input);

CDKMENU *newCDKMenu (
    CDKSCREEN *cdkscreen,
    char ***menuList,
    int menuListLength,
    int *submenuListLength,
    int *menuLocation,
    int menuPos,
    chtype titleAttribute,
    chtype subtitleAttribute);

void setCDKMenu (
    CDKMENU *menu,
    int menuItem,
    int submenuItem,
    chtype titleAttribute,
    chtype subtitleAttribute);

void setCDKMenuCurrentItem (
    CDKMENU *menu,
    int menuItem,
    int submenuItem);

void setCDKMenuPostProcess (
    CDKMENU *menu,
    PROCESSFN callback,
    void * data);

void setCDKMenuPreProcess (
    CDKMENU *menu,
    PROCESSFN callback,
    void * data);

void setCDKMenuSubTitleHighlight (
    CDKMENU *menu,
    chtype highlight);

void setCDKMenuTitleHighlight (
    CDKMENU *menu,
    chtype highlight);

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

AVAILABLE FUNCTIONS

activateCDKMenu
    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.

destroyCDKMenu
    removes the widget from the screen and frees memory the object used.

drawCDKMenu
    draws the menu widget on the screen. If the box parameter is true, the widget is drawn with a box.

eraseCDKMenu
    removes the widget from the screen. This does NOT destroy the widget.

getCDKMenuCurrentItem
    returns the values menuItem and submenuItem to the current menu selection.

getCDKMenuSubTitleHighlight
    returns the highlight attribute of the sub-menu selection bar.

getCDKMenuTitleHighlight
    returns the highlight attributes of the menu title.

injectCDKMenu
    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. If the character injected into this widget was RETURN then the character injected into this widget is RETURN or TAB then this function will return 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. Any other character injected into the widget will set the widget data exitType to vEARLY_EXIT and the function will return -1.

newCDKMenu
    creates a menu widget and returns a pointer to it. The screen parameter is the screen you wish this widget to be placed in. The parameter menuList is a list of the menu list titles while menuListLength states how many pull down menus there are. The parameter submenuListLength states how many menu items are under each menu list. The menuLocation parameter states where each menu is to be located. Valid values are LEFT and RIGHT. The parameter menuPos sets whether the menu is to be on the top of the screen or the bottom. Valid values are TOP and BOTTOM. The parameters titleAttribute and subtitleAttribute are the character attributes of the title and sub-titles respectively. If the widget could not be created then a NULL pointer is returned.

setCDKMenu
    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.

setCDKMenuCurrentItem
    sets the current item in the menu widget.

setCDKMenuPostProcess
    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).

setCDKMenuPreProcess
    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).

setCDKMenuSubTitleHighlight
    sets the highlight attribute of the sub-menu selection bar.

setCDKMenuTitleHighlight
    sets the highlight attributes of the menu title.

KEY BINDINGS
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.

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