cdk_buttonbox man page

cdk_buttonbox — Creates a managed curses buttonbox widget.

Synopsis

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

#include <cdk.h>

    int activateCDKButtonbox (
CDKBUTTONBOX *buttonbox,
chtype * actions);
    void destroyCDKButtonbox (
CDKBUTTONBOX *buttonbox);
    void drawCDKButtonbox (
CDKBUTTONBOX *buttonbox,
boolean box);
    void drawCDKButtonboxButtons (
CDKBUTTONBOX *buttonbox);
    void eraseCDKButtonbox (
CDKBUTTONBOX *buttonbox);
    boolean getCDKButtonboxBox (
CDKBUTTONBOX *buttonbox);
    int getCDKButtonboxButtonCount (
CDKBUTTONBOX *buttonbox);
    int getCDKButtonboxCurrentButton (
CDKBUTTONBOX *buttonbox);
    chtype getCDKButtonboxHighlight (
CDKBUTTONBOX *buttonbox);
    int injectCDKButtonbox (
CDKBUTTONBOX *buttonbox,
chtype input);
    void moveCDKButtonbox (
CDKBUTTONBOX *buttonbox,
int xpos,
int ypos,
boolean relative,
boolean refresh);
    CDKBUTTONBOX *newCDKButtonbox (
CDKSCREEN *cdkscreen,
int xpos,
int ypos,
int height,
int width,
const char * title,
int rows,
int cols,
CDK_CONST char ** buttons,
int buttonCount,
chtype highlight,
boolean box,
boolean shadow);
    void positionCDKButtonbox (
CDKBUTTONBOX *buttonbox);
    void setCDKButtonbox (
CDKBUTTONBOX *buttonbox,
chtype highlight,
boolean box);
    void setCDKButtonboxBackgroundAttrib (
CDKBUTTONBOX *buttonbox,
chtype attribute);
    void setCDKButtonboxBackgroundColor (
CDKBUTTONBOX *buttonbox,
const char * color);
    void setCDKButtonboxBox (
CDKBUTTONBOX *buttonbox,
boolean box);
    void setCDKButtonboxBoxAttribute (
CDKBUTTONBOX *buttonbox,
chtype character);
    void setCDKButtonboxCurrentButton (
CDKBUTTONBOX *buttonbox,
int button);
    void setCDKButtonboxHighlight (
CDKBUTTONBOX *buttonbox,
chtype highlight);
    void setCDKButtonboxHorizontalChar (
CDKBUTTONBOX *buttonbox,
chtype character);
    void setCDKButtonboxLLChar (
CDKBUTTONBOX *buttonbox,
chtype character);
    void setCDKButtonboxLRChar (
CDKBUTTONBOX *buttonbox,
chtype character);
    void setCDKButtonboxPostProcess (
CDKBUTTONBOX *buttonbox,
PROCESSFN callback,
void * data);
    void setCDKButtonboxPreProcess (
CDKBUTTONBOX *buttonbox,
PROCESSFN callback,
void * data);
    void setCDKButtonboxULChar (
CDKBUTTONBOX *buttonbox,
chtype character);
    void setCDKButtonboxURChar (
CDKBUTTONBOX *buttonbox,
chtype character);
    void setCDKButtonboxVerticalChar (
CDKBUTTONBOX *buttonbox,
chtype character);

Description

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

Available Functions

activateCDKButtonbox

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 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.

destroyCDKButtonbox

removes the widget from the screen and releases any memory the object used.

drawCDKButtonbox

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

drawCDKButtonboxButtons

draws the buttons.

eraseCDKButtonbox

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

getCDKButtonboxBox

returns true if the widget will be drawn with a box around it.

getCDKButtonboxButtonCount

returns the number of buttons in the button box.

getCDKButtonboxCurrentButton

returns the current button-number.

getCDKButtonboxHighlight

returns the highlight attribute of the widget.

injectCDKButtonbox

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. The return value and side-effect (setting the widget data exitType) depend upon the injected character:

RETURN or TAB

the function returns a value ranging from zero to one less than the number of buttons, representing the button selected. The widget data exitType is set to vNORMAL.

ESCAPE

the function returns -1. vESCAPE_HIT. The widget data exitType is set to vESCAPE_HIT.

Otherwise

unless modified by preprocessing, postprocessing or key bindings, the function returns -1. The widget data exitType is set to vEARLY_EXIT.

moveCDKButtonbox

moves the given widget to the given position. The parameters xpos and ypos are the new position of the widget. The parameter xpos may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER. The parameter ypos may be an integer or one of the pre-defined values 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 TOP, BOTTOM, LEFT, RIGHT, or CENTER when relative = TRUE. (weird things may happen). The final parameter refresh is a boolean value which states whether the widget will get refreshed after the move.

newCDKButtonbox

creates a pointer to a buttonbox widget. Parameters:

screen

is the screen you wish this widget to be placed in.

xpos

controls the placement of the object along the horizontal axis. It may be an integer or one of the pre-defined values LEFT, RIGHT, and CENTER.

ypos

controls the placement of the object along the vertical axis. It be an integer value or one of the pre-defined values TOP, BOTTOM, and CENTER.

height and
width

control the height and width of the widget.

title

is the title of the widget.

rows

is the number of rows of buttons.

cols

sets the number of columns.

buttons

is an array containing the button labels.

buttonCount

is the number of elements in the buttons array.

highlight

is the attribute of the currently highlighted button.

box

is true if the widget should be drawn with a box around it.

shadow

turns the shadow on or off around this widget.

If the widget could not be created then a NULL pointer is returned.

positionCDKButtonbox

allows the user to move the widget around the screen via the cursor/keypad keys. See cdk_position (3) for key bindings.

setCDKButtonbox

lets the programmer modify certain elements of an existing buttonbox widget. The parameter names correspond to the same parameter names listed in the newCDKButtonbox function.

setCDKButtonboxBackgroundAttrib

sets the background attribute of the widget. The parameter attribute is a curses attribute, e.g., A_BOLD.

setCDKButtonboxBackgroundColor

sets the background color of the widget. The parameter color is in the format of the Cdk format strings. (See cdk_display).

setCDKButtonboxBox

sets true if the widget will be drawn with a box around it.

setCDKButtonboxBoxAttribute

sets the attribute of the box.

setCDKButtonboxCurrentButton

sets the current button-number for the box.

setCDKButtonboxHighlight

sets the highlight attribute of the selected button.

setCDKButtonboxHorizontalChar

sets the horizontal drawing character for the box to the given character.

setCDKButtonboxLLChar

sets the lower left hand corner of the widget's box to the given character.

setCDKButtonboxLRChar

sets the lower right hand corner of the widget's box to the given character.

setCDKButtonboxPostProcess

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. (See cdk_process).

setCDKButtonboxPreProcess

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. (See cdk_process).

setCDKButtonboxULChar

sets the upper left hand corner of the widget's box to the given character.

setCDKButtonboxURChar

sets the upper right hand corner of the widget's box to the given character.

setCDKButtonboxVerticalChar

sets the vertical drawing character for the box to the given character.

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 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 the index of the selected button. This also sets the widget data exitType to vNORMAL.
Tab Exits the widget and returns the index of the selected button. 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_position(3), cdk_process(3), cdk_screen(3)

Referenced By

cdk(3), cdk_binding(3).