newCDKButtonbox, activateCDKButtonbox, injectCDKButtonbox, drawCDKButtonbox, setCDKButtonbox, setCDKButtonboxHighlight, getCDKButtonboxHighlight, setCDKButtonboxBox, getCDKButtonboxBox, setCDKButtonboxULChar, setCDKButtonboxURChar, setCDKButtonboxLLChar, setCDKButtonboxLRChar, setCDKButtonboxVerticalChar, setCDKButtonboxHorizontalChar, setCDKButtonboxBoxAttribute, setCDKButtonboxBackgroundColor, eraseCDKButtonbox, destroyCDKButtonbox, setCDKButtonboxPreProcess, setCDKButtonboxPostProcess - Creates a managed curses buttonbox widget.

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

#include <cdk.h>

CDKBUTTONBOX *newCDKButtonbox (CDKSCREEN *cdkscreen, int xpos, int ypos, int height, int width, char ** title, int rows, int cols, char ** buttons, int buttonCount, chtype highlight, boolean box, boolean shadow);

int activateCDKButtonbox (CDKBUTTONBOX *buttonbox, chtype * actions);

int injectCDKButtonbox (CDKBUTTONBOX *buttonbox, chtype input);

void setCDKButtonbox (CDKBUTTONBOX *buttonbox, chtype highlight, boolean box);

void setCDKButtonboxHighlight (CDKBUTTONBOX *buttonbox, chtype highlight);

chtype getCDKButtonboxHighlight (CDKBUTTONBOX *buttonbox);

void setCDKButtonboxBox (CDKBUTTONBOX *buttonbox, boolean box);

boolean getCDKButtonboxBox (CDKBUTTONBOX *buttonbox);

void setCDKButtonboxULChar (CDKBUTTONBOX *,buttonbox, chtype character);

void setCDKButtonboxURChar (CDKBUTTONBOX *,buttonbox, chtype character);

void setCDKButtonboxLLChar (CDKBUTTONBOX *,buttonbox, chtype character);

void setCDKButtonboxLRChar (CDKBUTTONBOX *,buttonbox, chtype character);

void setCDKButtonboxVerticalChar (CDKBUTTONBOX *,buttonbox, chtype character);

void setCDKButtonboxHorizontalChar (CDKBUTTONBOX *,buttonbox, chtype character);

void setCDKButtonboxBoxAttribute (CDKBUTTONBOX *,buttonbox, chtype character);

void setCDKButtonboxBackgroundColor (CDKBUTTONBOX *,buttonbox, char * color);

void moveCDKButtonbox (CDKBUTTONBOX *buttonbox, int box, int box, boolean relative, boolean refresh);

void positionCDKButtonbox (CDKBUTTONBOX *buttonbox);

void drawCDKButtonbox (CDKBUTTONBOX *buttonbox, boolean box);

void eraseCDKButtonbox (CDKBUTTONBOX *buttonbox);

void setCDKButtonboxPreProcess (CDKBUTTONBOX *buttonbox, PROCESSFN callback, void * data);

void setCDKButtonboxPostProcess (CDKBUTTONBOX *buttonbox, PROCESSFN callback, void * data);

void destroyCDKButtonbox (CDKBUTTONBOX *buttonbox);

void bindCDKObject (EObjectType widgetType, void * object, chtype key, BINDFN function, void * data);

The Cdk buttonbox widget creates a buttonbox box with a message and a varied number of buttons to choose from. The following are functions which create or manipulate the Cdk buttonbox box widget.

CDKBUTTONBOX *newCDKButtonbox (CDKSCREEN *screen, int xpos, int ypos, char **title , int rows, int cols, char **buttons, int buttonCount, chtype highLight, boolean box, boolean shadow); This function creates a pointer to a buttonbox widget. The screen parameter is the screen you wish this widget to be placed in. The parameter xpos controls the placement of the object along the horizontal axis. This parameter accepts an integer value or one of the pre-defined values of LEFT, RIGHT, and CENTER. The parameter ypos controls the placement of the object along the vertical axis. This parameter can accept an integer value or one of the pre-defined values of TOP, BOTTOM, and CENTER. The height and width parameters control the height and width of the widget. The parameter title is the title of the widget. The rows parameter states how many rows of buttons there will be; cols sets the number of columns. The buttons array contains a list of all the buttons; while buttonCount is the number of elements in the button array. highlight is the attribute of the currently highlighted button. The box parameter states whether the widget will be drawn with a box around it or not. The shadow parameter accepts a boolean value to turn the shadow on or off around this widget. If the widget could not be created then a NULL pointer is returned.

int activateCDKButtonbox (CDKBUTTONBOX *buttonbox, chtype *actions); This function activates the buttonbox widget and lets the user interact with the widget. The parameter buttonbox is a pointer to a non-NULL buttonbox 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 or TAB then this function will return a value from 0 to the number of buttons -1, representing the button selected. It will also set the structure member exitType to vNORMAL. If the character entered into this widget was ESCAPE then the widget will return a value of -1 and the structure member exitType will be set to vESCAPE_HIT.

int injectCDKButtonbox (CDKBUTTONBOX *buttonbox, chtype character); This function injects a single character into the widget. The parameter buttonbox is a pointer to a non-NULL buttonbox 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 a value from 0 to the number of buttons -1, representing the button selected. It will also set the structure member exitType to vNORMAL. If the character entered into this widget was ESCAPE then the widget will return a value of -1 and the structure member exitType will be set to vESCAPE_HIT. Any other character injected into the widget will set the structure member exitType to vEARLY_EXIT and the function will return -1.

void setCDKButtonbox (CDKBUTTONBOX *buttonbox, chtype highlight, boolean box); This function lets the programmer modify certain elements of an already defined buttonbox widget. The parameter names correspond to the same parameter names listed in the newCDKButtonbox function.

void setCDKButtonboxHighlight (CDKBUTTONBOX *buttonbox, chtype highlight); This sets the highlight attribute of the selected button. chtype getCDKButtonboxHighlight (CDKBUTTONBOX *buttonbox); This returns the highlight attribute of the widget.

void setCDKButtonboxBox (CDKBUTTONBOX *buttonbox, boolean boxWidget); This sets whether or not the widget will be draw with a box around it.

boolean getCDKButtonboxBox (CDKBUTTONBOX *buttonbox); This returns whether or not the widget will be drawn with a box around it.

void setCDKButtonboxULChar (CDKBUTTONBOX *buttonbox, chtype character); This function sets the upper left hand corner of the widgets box to the given character.

void setCDKButtonboxURChar (CDKBUTTONBOX *buttonbox, chtype character); This function sets the upper right hand corner of the widgets box to the given character.

void setCDKButtonboxLLChar (CDKBUTTONBOX *buttonbox, chtype character); This function sets the lower left hand corner of the widgets box to the given character.

void setCDKButtonboxLRChar (CDKBUTTONBOX *buttonbox, chtype character); This function sets the lower right hand corner of the widgets box to the given character.

void setCDKButtonboxVerticalChar (CDKBUTTONBOX *buttonbox, chtype character); This function sets the vertical drawing character for the box to the given character.

void setCDKButtonboxHorizontalChar (CDKBUTTONBOX *buttonbox, chtype character); This function sets the horizontal drawing character for the box to the given character.

void setCDKButtonboxBoxAttribute (CDKBUTTONBOX *buttonbox, chtype attribute); This function sets the attribute of the box.

void setCDKButtonboxBackgroundColor (CDKBUTTONBOX *buttonbox, char *color); This sets the background color of the widget. The parameter color is in the format of the Cdk format strings. To get more information look at the cdk_display manual page.

void moveCDKButtonbox (CDKBUTTONBOX *buttonbox, int xpos, int ypos, boolean relative, boolean refresh); This function moves the given widget to the given position. The parameters xpos and ypos is the new position of the widget. The parameter xpos can accept an integer value or one of the pre-defined values of TOP, BOTTOM, and CENTER. The parameter ypos can accept an integer value or one of the pre-defined values of 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 of TOP, BOTTOM, LEFT, RIGHT, or CENTER when relative = TRUE. (wierd things may happen). The final parameter refresh is a boolean value which states whether the widget will get refreshed after the move or not.

void positionCDKButtonbox (CDKBUTTONBOX *buttonbox); This function allows the user to move the widget around the screen via the cursor/keypad keys. The following key bindings can be used to move the widget around the screen.

Key Bindings
Key          Action
Up Arrow     Moves the widget up one line.
Down Arrow   Moves the widget down one line.
Left Arrow   Moves the widget left one column
Right Arrow  Moves the widget right one column
Keypad-1     Moves the widget down one line
             and left one column.
Keypad-2     Moves the widget down one line.
Keypad-3     Moves the widget down one line
             and right one column.
Keypad-4     Moves the widget left one column
Keypad-5     Centers the widget both vertically
             and horizontally.
Keypad-6     Moves the widget right one column
Keypad-7     Moves the widget up one line
             and left one column.
Keypad-8     Moves the widget up one line.
Keypad-9     Moves the widget up one line
             and right one column.
t            Moves the widget to the top of the screen.
b            Moves the widget to the bottom of the screen.
l            Moves the widget to the left of the screen.
r            Moves the widget to the right of the screen.
c            Centers the widget between the left and 
             right of the window.
C            Centers the widget between the top and 
             bottom of the window.
Escape       Returns the widget to it's original position.
Return       Exits the function and leaves the widget
             where it was.

Keypad means that if the keyboard you are using has a keypad, then the Num-Lock light has to be on in order to use the keys as listed. (The numeric keys at the top of the keyboard will work as well.)

void drawCDKButtonbox (CDKBUTTONBOX *buttonbox, boolean box); This function draws the buttonbox widget on the screen. The box option draws the widget with or without a box.

void eraseCDKButtonbox (CDKBUTTONBOX *buttonbox); This function removes the widget from the screen. This does NOT destroy the widget.

void destroyCDKButtonbox (CDKBUTTONBOX *buttonbox); This function removes the widget from the screen and frees up any memory the object may be using.

void setCDKButtonboxPreProcess (CDKBUTTONBOX *buttonbox, PROCESSFN function, void *data); This function 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 if of type PROCESSFN. The parameter data is a pointer to void. To learn more about pre-processing read the cdk_process manual page.

void setCDKButtonboxPostProcess (CDKBUTTONBOX *buttonbox, PROCESSFN function, void *data); This function allows the user to have the widget call a function after the key has been applied to the widget. The parameter function if of type PROCESSFN. The parameter data is a pointer to void. To learn more about post-processing read the cdk_process manual page.

void bindCDKObject (EObjectType widgetType, void *object, chtype key, BINDFN function, void *data); This function allows the user to create special key bindings. The widgetType parameter is a defined type which states what Cdk object type is being used. To learn more about the type EObjectType read the cdk_binding manual page. The object parameter is the pointer to the widget object. The key is the character to bind. The function is the function type. To learn more about the key binding callback function types read the cdk_binding manual page. The last parameter data is a pointer to any data that needs to get passed to the callback function.

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   Selects the button to the left of the current button.
Right Arrow  Selects the button to the right of the current button.
Tab          Selects the button to the right of the current button.
Space        Selects the button to the right of the current button.
Return       Exits the widget and returns an integer value
             representing which button was selected. This also sets
             the structure member exitType in the widget pointer
             to the value of vNORMAL.
Tab          Exits the widget and returns an integer value representing
             which button was selected. This also sets the structure
             member exitType in the widget pointer to the value
             of vNORMAL.
Escape       Exits the widget and returns -1. This also sets the structure
             member exitType in the widget pointer to the value of 
             vESCAPE_HIT.
Ctrl-L       Refreshes the screen.

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