newCDKMatrix, activateCDKMatrix, injectCDKMatrix, setCDKMatrix, setCDKMatrixCell, getCDKMatrixCell, setCDKMatrixCB, setCDKMatrixULChar, setCDKMatrixURChar, setCDKMatrixLLChar, setCDKMatrixLRChar, setCDKMatrixVerticalChar, setCDKMatrixHorizontalChar, setCDKMatrixBoxAttribute, setCDKMatrixBackgroundColor, drawCDKMatrix, eraseCDKMatrix, cleanCDKMatrix, moveToCDKMatrixCell, jumpToCell, destroyCDKMatrix, setCDKMatrixPreProcess, setCDKMatrixPostProcess - Creates a managed curses matrix widget.

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

#include <cdk.h>

CDKMATRIX *newCDKMatrix (CDKSCREEN *cdkscreen, int xpos, int ypos, int screenRows, int screenCols, int actualRows, int actualCols, char *title, char **rowTitles, char **colTitles, int *columnWidths, int *columnTypes, int rowSpace, int colSpace, chtype filler, int dominantAttribute, boolean boxCell, boolean shadow);

int activateCDKMatrix (CDKMATRIX *matrix, chtype * actions);

int injectCDKMatrix (CDKMATRIX *matrix, chtype input);

void setCDKMatrix (CDKMATRIX *matrix, char **info, int rows, int *columnLengths);

void setCDKMatrixCell (CDKMATRIX *matrix, int row, int col, char *value);

void getCDKMatrixCell (CDKMATRIX *matrix, int row, int col);

void setCDKMatrixCB (CDKMATRIX *matrix, MATRIXCB callbackFunction);

void setCDKMatrixULChar (CDKMATRIX *,matrix, chtype character);

void setCDKMatrixURChar (CDKMATRIX *,matrix, chtype character);

void setCDKMatrixLLChar (CDKMATRIX *,matrix, chtype character);

void setCDKMatrixLRChar (CDKMATRIX *,matrix, chtype character);

void setCDKMatrixVerticalChar (CDKMATRIX *,matrix, chtype character);

void setCDKMatrixHorizontalChar (CDKMATRIX *,matrix, chtype character);

void setCDKMatrixBoxAttribute (CDKMATRIX *,matrix, chtype character);

void setCDKMatrixBackgroundColor (CDKMATRIX *,matrix, char * color);

void moveCDKMatrix (CDKMATRIX *matrix, int box, int box, boolean relative, boolean refresh);

void positionCDKMatrix (CDKMATRIX *matrix);

void drawCDKMatrix (CDKMATRIX *matrix, boolean box);

void eraseCDKMatrix (CDKMATRIX *matrix);

void cleanCDKMatrix (CDKMATRIX *matrix);

int moveToCDKMatrixCell (CDKMATRIX *matrix, int row, int col);

int jumpToCell (CDKMATRIX *matrix);

void destroyCDKMatrix (CDKMATRIX *matrix);

void setCDKMatrixPreProcess (CDKMATRIX *matrix, PROCESSFN callback, void * data);

void setCDKMatrixPostProcess (CDKMATRIX *matrix, PROCESSFN callback, void * data);

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

The Cdk matrix widget creates a matrix widget. The following are functions which create or manipulate the Cdk matrix box widget.

CDKMATRIX *newCDKMatrix (CDKSCREEN *screen, int xpos, int ypos, int screenRows, int screenCols, int actualRows, int actualCols, char *title, char **rowTitles, char **colTitles, int *colWidths, int *colTypes, int rowSpace, int colSpace, chtype filler, int dominantAttribute, boolean boxMatrix, boolean boxCell, boolean shadow); This function creates a pointer to a matrix 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 can accept 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 parameters screenRows and screenCols are the number of rows and columns to be displayed on the screen respectively; where actualRows and actualCols are the number of actual rows and columns the matrix has. The title parameter is the string which will be displayed at the top of the widget. The title can be more than one line; just provide a carriage return character at the line break. The two parameters rowTitles and colTitles are the titles along the row and columns respectively. The parameter columnWidths is an array of integers stating how wide the individual columns are to be. The parameter columnTypes is an array of int which correspond to the individual column display types. The values of the array should be assigned a value of type EDisplayType. (it is only declared an int out of convenience) The following table outlines valid values for this field and what the result is.

Display_Type      Result
vCHAR             Only accepts alphabetic characters.
vLCHAR            Only accepts alphabetic characters.
                  Maps the character to lower case
                  when a character has been accepted.
vUCHAR            Only accepts alphabetic characters.
                  Maps the character to upper case
                  when a character has been accepted.
vHCHAR            Only accepts alphabetic characters.
                  Displays a . when a character
                  has been accepted.
vUHCHAR           Only accepts alphabetic characters.
                  Displays a . and maps the
                  character to upper case when a
                  character has been accepted.
vLHCHAR           Only accepts alphabetic characters.
                  Displays a . and maps the
                  character to lower case when a
                  character has been accepted.
vINT              Only accepts numeric characters.
vHINT             Only accepts numeric characters.
                  Displays a . when a character
                  has been accepted.
vMIXED            Accepts any character types.
vLMIXED           Accepts any character types.
                  Maps the character to lower case
                  when an alphabetic character has
                  been accepted.
vUMIXED           Accepts any character types.
                  Maps the character to upper case
                  when an alphabetic character has
                  been accepted.
vHMIXED           Accepts any character types.
                  Displays a . when a character
                  has been accepted.
vLHMIXED          Accepts any character types.
                  Displays a . and maps the
                  charac}er to lower case when a
                  character has been accepted.
vUHMIXED          Accepts any character types.
                  Displays a . and maps the
                  character to upper case when a
                  character has been accepted.
vVIEWONLY         Uneditable field.

The parameters rowSpace and colSpace dictate how much white space is to be between rows and columns respectively. The filler option is the character to use in empty space within a cell. The parameter dominantAttribute states which between the two, the rows or the columns, will have the dominant character attributes. This is stated when a cell has both a row attribute and a column attribute. If the value of the parameter dominantAttribute is set to ROW then the attribute of the row will be displayed. If it is set to COL then the column's attributes will be displayed instead. The boxMatrix parameter states whether the widget will be drawn with a box around it or not. The boxCell parameter states whether or not the individual cells will have boxes drawn around them. 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 activateCDKMatrix (CDKMATRIX *matrix, chtype *actions); This function activates the matrix widget and lets the user interact with the widget. The parameter matrix is a pointer to a non-NULL matrix 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 function will return 1. 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. The matrix cell contents can be retrieved by using the info array of the matrix widget.

int injectCDKMatrix (CDKMATRIX *matrix, chtype character); This function injects a single character into the widget. The parameter matrix is a pointer to a non-NULL matrix widget. The parameter character is the character to inject into the widget. If the character injected into this widget was RETURN then this function will return 1. 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. The matrix cell contents can be retrieved by using the info array of the matrix widget.

void setCDKMatrix (CDKMATRIX *matrix, char **info, int rows, int *columnLengths); This function lets the programmer modify certain elements of an already defined matrix widget. The parameter info is an array of char * which contains the cell information. The parameter rows has the number of rows the parameter info contains, while columnLengths has the lengths of the individual columns in info.

void setCDKMatrixCell (CDKMATRIX *matrix, int row, int col, char *value); This sets the contents of the cell located by the row and col pair. The value of the cell will be set to value.

char *getCDKMatrixCell (CDKMATRIX *matrix, int row, int col); This returns the contents of the cell located by the row and col pair.

void setCDKMatrixCB (CDKMATRIX *matrix, MATRIXCB callbackFunction); This function allows the programmer to set a different widget input handler. The parameter callbackFunction is of type MATRIXCB. The current default function is CDKMatrixCallBack.

void setCDKMatrixULChar (CDKMATRIX *matrix, chtype character); This function sets the upper left hand corner of the widgets box to the given character.

void setCDKMatrixURChar (CDKMATRIX *matrix, chtype character); This function sets the upper right hand corner of the widgets box to the given character.

void setCDKMatrixLLChar (CDKMATRIX *matrix, chtype character); This function sets the lower left hand corner of the widgets box to the given character.

void setCDKMatrixLRChar (CDKMATRIX *matrix, chtype character); This function sets the lower right hand corner of the widgets box to the given character.

void setCDKMatrixVerticalChar (CDKMATRIX *matrix, chtype character); This function sets the vertical drawing character for the box to the given character.

void setCDKMatrixHorizontalChar (CDKMATRIX *matrix, chtype character); This function sets the horizontal drawing character for the box to the given character.

void setCDKMatrixBoxAttribute (CDKMATRIX *matrix, chtype attribute); This function sets the attribute of the box.

void setCDKMatrixBackgroundColor (CDKMATRIX *matrix, 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 moveCDKMatrix (CDKMATRIX *matrix, 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 positionCDKMatrix (CDKMATRIX *matrix); 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 drawCDKMatrix (CDKMATRIX *matrix, boolean box); This function draws the matrix widget on the screen. The box option draws the widget with or without a box.

void eraseCDKMatrix (CDKMATRIX *matrix); This function removes the widget from the screen. This does NOT destroy the widget.

void cleanCDKMatrix (CDKMATRIX *matrix); This function clears the information from the field.

int moveToCDKMatrixCell (CDKMATRIX *matrix, int row, int col); This function jumps to the given cells dictated by the parameters row and col. It returns a value of TRUE or FALSE depending if the move was successful or not.

int jumpToCell (CDKMATRIX *matrix); This function provides an interactive method of moving to a cell. It pops up a scale widget and asks which cell the user wants to go to. Then it performs the jump.

void destroyCDKMatrix (CDKMATRIX *matrix); This function removes the widget from the screen and frees up any memory the object may be using.

void setCDKMatrixPreProcess (CDKMATRIX *matrix, 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 setCDKMatrixPostProcess (CDKMATRIX *matrix, 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, char 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  Moves one cell to the left.
Right Arrow Moves the cell to the right.
Tab         Moves the cell to the right.
Up Arrow    Moves one cell up.
Down Arrow  Moves one cell down.
Next Page   Moves one page forward.
Ctrl-F      Moves one page forward.
Prev Page   Moves one page backward.
Ctrl-B      Moves one page backward.
Ctrl-G      Calls the function jumpToCell and requests which
            cell the user wishes to jump to.
Ctrl-P      Pastes whatever is in the paste buffer, into the
            current cell.
Ctrl-K      Cuts the contents from the current cell and saves a
            copy in the paste buffer.
Ctrl-T      Copies the contents of the current cell into the
            paste buffer.
Ctrl-E      Erases the contents of the current cell.
Delete      Deletes the character to the left of the cursor.
Backspace   Deletes the character to the left of the cursor.
Ctrl-H      Deletes the character to the left of the cursor.
Return      Exits the widget and returns 1. 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_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.