cdk_mentry man page

cdk_mentry ā€” curses multiple line entry widget.

Synopsis

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

#include <cdk.h>

    char *activateCDKMentry (
CDKMENTRY *mentry,
chtype *actions);
    void cleanCDKMentry (
CDKMENTRY *mentry);
    void destroyCDKMentry (
CDKMENTRY *mentry);
    void drawCDKMentry (
CDKMENTRY *mentry,
boolean box);
    void drawCDKMentryField (
CDKMENTRY *mentry);
    void eraseCDKMentry (
CDKMENTRY *mentry);
    boolean getCDKMentryBox (
CDKMENTRY *mentry);
    chtype getCDKMentryFillerChar (
CDKMENTRY *mentry);
    chtype getCDKMentryHiddenChar (
CDKMENTRY *mentry);
    int getCDKMentryMin (
CDKMENTRY *mentry);
    char *getCDKMentryValue (
CDKMENTRY *mentry);
    char *injectCDKMentry (
CDKMENTRY *mentry,
chtype input);
    void moveCDKMentry (
CDKMENTRY *mentry,
int xpos,
int ypos,
boolean relative,
boolean refresh);
    CDKMENTRY *newCDKMentry (
CDKSCREEN *cdkscreen,
int xpos,
int ypos,
const char *title,
const char *label,
chtype fieldAttribute,
chtype fillerCharacter,
EDisplayType displayType,
int fieldWidth,
int fieldRows,
int logicalRows,
int minimumLength,
boolean box,
boolean shadow);
    void positionCDKMentry (
CDKMENTRY *mentry);
    void setCDKMentry (
CDKMENTRY *mentry,
const char *value,
int minimumLength,
boolean box);
    void setCDKMentryBackgroundAttrib (
CDKMENTRY *mentry,
chtype attribute);
    void setCDKMentryBackgroundColor (
CDKMENTRY *mentry,
const char * color);
    void setCDKMentryBox (
CDKMENTRY *mentry,
boolean boxWidget);
    void setCDKMentryBoxAttribute (
CDKMENTRY *mentry,
chtype character);
    void setCDKMentryCB (
CDKMENTRY *mentry,
MENTRYCB callBackFunction);
    void setCDKMentryFillerChar (
CDKMENTRY *mentry,
chtype filler);
    void setCDKMentryHiddenChar (
CDKMENTRY *mentry,
chtype character);
    void setCDKMentryHorizontalChar (
CDKMENTRY *mentry,
chtype character);
    void setCDKMentryLLChar (
CDKMENTRY *mentry,
chtype character);
    void setCDKMentryLRChar (
CDKMENTRY *mentry,
chtype character);
    void setCDKMentryMin (
CDKMENTRY *mentry,
int maximum);
    void setCDKMentryPostProcess (
CDKMENTRY *mentry,
PROCESSFN callback,
void * data);
    void setCDKMentryPreProcess (
CDKMENTRY *mentry,
PROCESSFN callback,
void * data);
    void setCDKMentryULChar (
CDKMENTRY *mentry,
chtype character);
    void setCDKMentryURChar (
CDKMENTRY *mentry,
chtype character);
    void setCDKMentryValue (
CDKMENTRY *mentry,
const char *value);
    void setCDKMentryVerticalChar (
CDKMENTRY *mentry,
chtype character);

Description

The Cdk mentry widget creates a multiple line entry box with a label and an entry field. The following are functions which create or manipulate the Cdk mentry box widget.

Available Functions

activateCDKMentry

activates the mentry widget and lets the user interact with the widget. The parameter mentry is a pointer to a non-NULL mentry 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 char * representing the information typed into the widget and the widget data exitType will be set to vNORMAL. If the character entered was ESCAPE then the function will return NULL pointer and the widget data exitType is set to vESCAPE_HIT.

cleanCDKMentry

clears the information from the field.

destroyCDKMentry

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

drawCDKMentry

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

drawCDKMentryField

redraws the multiple line entry field.

eraseCDKMentry

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

getCDKMentryBox

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

getCDKMentryFillerChar

returns the character being used to draw unused space in the widget.

getCDKMentryHiddenChar

returns the character being used to draw hidden characters in the widget (obsolete).

getCDKMentryMin

returns the minimum length of a string the widget will allow.

getCDKMentryValue

returns the current value of the widget.

injectCDKMentry

injects a single character into the widget. The parameter mentry is a pointer to a non-NULL mentry. 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 char * representing the information typed into the widget. The widget data exitType is set to vNORMAL.

ESCAPE

the function returns a NULL pointer. The widget data exitType is set to vESCAPE_HIT.

Otherwise

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

moveCDKMentry

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.

newCDKMentry

creates a mentry 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.

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.

label

is the string which will be displayed in the label of the mentry field.

fieldAttribute

is the attribute of the characters to be displayed when they are typed in.

filler

is the character which is to display in an empty space in the mentry field.

displayType

tells how the mentry field will behave when a character is entered into the field. The following table outlines valid values for this field and what they mean:

Display_Type Meaning
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 character 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.
fieldRows and
fieldWidth

control the height and width of the field of the widget. If you provide a value of zero for either of the values, the field in the widget will be made as large as it can both in width and in height. If you provide a negative value, the field will be created the full height or width minus the value provided.

logicalRows

is the number of rows for the mentry field.

minimumLength

is the number of characters which must be entered before the use can exit the mentry field.

callBackFunction

allows the user to override the key processing element of the widget.

box

is true if 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.

positionCDKMentry

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

setCDKMentry

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

setCDKMentryBackgroundAttrib

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

setCDKMentryBackgroundColor

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

setCDKMentryBox

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

setCDKMentryBoxAttribute

function sets the attribute of the box.

setCDKMentryCB

function allows the programmer to set a different widget input handler. The parameter callbackFunction is of type MENTRYCB. The default function is CDKMentryCallBack.

setCDKMentryFillerChar

sets the character to use when drawing unused space in the field.

setCDKMentryHiddenChar

sets the character to use when a hidden character type is used (obsolete).

setCDKMentryHorizontalChar

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

setCDKMentryLLChar

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

setCDKMentryLRChar

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

setCDKMentryMin

sets the minimum length of the string that the widget will allow.

setCDKMentryPostProcess

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).

setCDKMentryPreProcess

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).

setCDKMentryULChar

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

setCDKMentryURChar

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

setCDKMentryValue

sets the current value of the widget.

setCDKMentryVerticalChar

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 the cursor to the left.
CTRL-B Moves the cursor to the left.
Right Arrow Moves the cursor to the right.
CTRL-F Moves the cursor to the right.
Up Arrow Moves the cursor one row down.
Down Arrow Moves the cursor one row up.
Delete Deletes the character at the cursor.
Backspace Deletes the character before cursor, moves cursor left.
CTRL-V Pastes whatever is in the paste buffer, into the widget.
CTRL-X Cuts the contents from the widget and saves a copy in the paste buffer.
CTRL-Y Copies the contents of the widget into the paste buffer.
CTRL-U Erases the contents of the widget.
CTRL-A Moves the cursor to the beginning of the entry field.
CTRL-E Moves the cursor to the end of the entry field.
CTRL-T Transposes the character under the cursor with the character to the right.
Return Exits the widget and returns a char * representing the information which was typed into the field. It also sets the widget data exitType in the widget pointer to vNORMAL.
Tab Exits the widget and returns a char * representing the information which was typed into the field. It also sets the widget data exitType in the widget pointer to vNORMAL.
Escape Exits the widget and returns a NULL pointer. It 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)

Referenced By

cdk(3), cdk_binding(3).