cdk_matrix(3)

NAME
cdk_matrix - curses matrix widget.

SYNOPSIS

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

#include <cdk.h>

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

void cleanCDKMatrix (
    CDKMATRIX *matrix);

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

void destroyCDKMatrix (
    CDKMATRIX *matrix);

void drawCDKMatrix (
    CDKMATRIX *matrix,
    boolean box);

void eraseCDKMatrix (
    CDKMATRIX *matrix);

boolean getCDKMatrixBox (
    CDKMENTRY *matrix);

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

int getCDKMatrixCol (
    CDKMENTRY *matrix);

int getCDKMatrixRow (
    CDKMENTRY *matrix);

int injectCDKMatrix (
    CDKMATRIX *matrix,
    chtype input);

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

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

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

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

void positionCDKMatrix (
    CDKMATRIX *matrix);

void setCDKMatrix (
    CDKMATRIX *matrix,
    char *info[MAX_MATRIX_ROWS][MAX_MATRIX_COLS],
    int rows,
    int *columnLengths);

void setCDKMatrixBackgroundAttrib (
    CDKMATRIX *matrix,
    chtype attribute);

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

void setCDKMatrixBox (
    CDKMENTRY *matrix,
    boolean boxWidget);

void setCDKMatrixBoxAttribute (
    CDKMATRIX *matrix,
    chtype character);

void setCDKMatrixCB (
    CDKMATRIX *matrix,
    MATRIXCB callbackFunction);

int setCDKMatrixCell (
    CDKMATRIX *matrix,
    int row,
    int col,
    const char *value);
    void setCDKMatrixCells (
    CDKMATRIX *matrix,
    CDK_CONST char **info,
    int rows,
    int cols,
    int *columnLengths);

void setCDKMatrixHorizontalChar (
    CDKMATRIX *matrix,
    chtype character);

void setCDKMatrixLLChar (
    CDKMATRIX *matrix,
    chtype character);

void setCDKMatrixLRChar (
    CDKMATRIX *matrix,
    chtype character);

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

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

void setCDKMatrixULChar (
    CDKMATRIX *matrix,
    chtype character);

void setCDKMatrixURChar (
    CDKMATRIX *matrix,
    chtype character);

void setCDKMatrixVerticalChar (
    CDKMATRIX *matrix,
    chtype character);

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

AVAILABLE FUNCTIONS

activateCDKMatrix
    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 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. The matrix cell contents can be retrieved by using the info array of the matrix widget.

cleanCDKMatrix
    clears the information from all cells of the matrix.

cleanCDKMatrixCell
    clears the information from the specified cell of the matrix.

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

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

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

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

getCDKMatrixCell
    returns the contents of the cell located by the row and col pair.

getCDKMatrixCol
    returns the current column index.

getCDKMatrixRow
    returns the current row index.

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

    RETURN or TAB
        the function returns 1. The widget data exitType is set to vNORMAL.

    ESCAPE
        the function returns -1. 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.

    The matrix cell contents can be retrieved by using the info array of the matrix widget.

jumpToCell
    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.

moveCDKMatrix
    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.

moveToCDKMatrixCell
    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.

newCDKMatrix
    creates a matrix widget and returns a pointer to it. 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 may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER.

    screenRows and

    screenCols
        are the number of rows and columns to be displayed on the screen respectively.

    actualRows and

    actualCols
        are the number of actual rows and columns the matrix has.

    title
        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.

    rowTitles and

    colTitles
        are the titles along the row and columns respectively.

    columnWidths
        is an array of integers stating how wide the individual columns are to be.

    columnTypes
        is an array of integers which correspond to the individual column display types. The values of the array should be assigned a value of type EDisplayType. See cdk_display (3) for legal values of EDisplayType.

    rowSpace and

    colSpace
        dictate how much white space is to be between rows and columns respectively.

    filler
        is the character to use in empty space within a cell.

    dominantAttribute
        states which (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.

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

    boxCell
        is true if the individual cells should have boxes drawn around them.

    shadow
        turns the shadow on or off around this widget.

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

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

setCDKMatrix
    lets the programmer modify certain elements of an existing 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.

    Do not use this function. It is obsolete, provided only for compatibility with older versions of CDK. Use setCDKMatrixCells.

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

setCDKMatrixBackgroundColor
    sets the background color of the widget. The parameter color is in the format of the Cdk format strings. See cdk_display (3).

setCDKMatrixBox
    sets whether the widget will be drawn with a box around it.

setCDKMatrixBoxAttribute
    sets the attribute of the box.

setCDKMatrixCB
    allows the programmer to set a different widget input handler. The parameter callbackFunction is of type MATRIXCB. The default function is CDKMatrixCallBack.

setCDKMatrixCell
    sets the contents of the cell located by the row and col pair. The value of the cell will be set to value.

setCDKMatrixCells,
    lets the programmer initialize elements of an existing 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 cols has the number of columns the parameter info contains, while columnLengths has the lengths of the individual columns in info.

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

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

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

setCDKMatrixPostProcess
    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).

setCDKMatrixPreProcess
    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).

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

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

setCDKMatrixVerticalChar
    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 | 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 before the cursor, moves cursor left. There is no function to delete the character at the cursor since there are no functions for moving the cursor within the edited text.
Backspace | Deletes the character before cursor, moves cursor left.
Ctrl-H | Deletes the character before the cursor.
Return | Exits the widget and returns 1. 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_screen(3)