cdk_mentry(3) cdk_mentry(3)
NAME
newCDKMentry, activateCDKMentry, injectCDKMentry, setCDK- Mentry, setCDKMentryValue, getCDKMentryValue, setCDKMen- tryMin, getCDKMentryMin, setCDKMentryFillerChar, getCDK- MentryFillerChar, setCDKMentryBox, getCDKMentryBox, setCD- KMentryULChar, setCDKMentryURChar, setCDKMentryLLChar, setCDKMentryLRChar, setCDKMentryVerticalChar, setCDKMen- tryHorizontalChar, setCDKMentryBoxAttribute, setCDKMentry- BackgroundColor, setCDKMentryCB, drawCDKMentry, eraseCDK- Mentry, cleanCDKMentry, destroyCDKMentry, setCDKMentryPre- Process, setCDKMentryPostProcess - Creates a managed curses multiple line entry widget.
SYNOPSIS
cc [ flag ... ] file ... -lcdk [ library ... ] #include <cdk.h> CDKMENTRY *newCDKMentry (CDKSCREEN *cdkscreen, int xpos, int ypos, char *title, char *label, chtype fieldAttribute, chtype fillerCharacter, EDisplayType displayType, int fieldWidth, int fieldRows, int logicalRows, int minimum- Length, boolean box, boolean shadow); char *activateCDKMentry (CDKMENTRY *mentry, chtype *actions); char *injectCDKMentry (CDKMENTRY *mentry, chtype input); void setCDKMentry (CDKMENTRY *mentry, char *value, int minimumLength, boolean box); void setCDKMmentryValue (CDKMENTRY *mentry, char *value); char *getCDKMmentryValue (CDKMENTRY *mentry); void setCDKMmentryMin (CDKMENTRY *mentry, int minimum); int getCDKMmentryMin (CDKMENTRY *mentry); void setCDKMmentryBox (CDKMENTRY *mentry, boolean box); boolean getCDKMmentryBox (CDKMENTRY *mentry); void setCDKMmentryBox (CDKMENTRY *mentry, boolean box); boolean getCDKMmentryBox (CDKMENTRY *mentry); void setCDKMentryCB (CDKMENTRY *mentry, MENTRYCB callBack- Function); void setCDKMentryULChar (CDKMENTRY *,mentry, chtype char- acter); 24 April 1997 1 cdk_mentry(3) cdk_mentry(3) void setCDKMentryURChar (CDKMENTRY *,mentry, chtype char- acter); void setCDKMentryLLChar (CDKMENTRY *,mentry, chtype char- acter); void setCDKMentryLRChar (CDKMENTRY *,mentry, chtype char- acter); void setCDKMentryVerticalChar (CDKMENTRY *,mentry, chtype character); void setCDKMentryHorizontalChar (CDKMENTRY *,mentry, chtype character); void setCDKMentryBoxAttribute (CDKMENTRY *,mentry, chtype character); void setCDKMentryBackgroundColor (CDKMENTRY *,mentry, char * color); void moveCDKMentry (CDKMENTRY *mentry, int box, int box, boolean relative, boolean refresh); void positionCDKMentry (CDKMENTRY *mentry); void drawCDKMentry (CDKMENTRY *mentry, boolean box); void eraseCDKMentry (CDKMENTRY *mentry); void cleanCDKMentry (CDKMENTRY *mentry); void destroyCDKMentry (CDKMENTRY *mentry); void setCDKMentryPreProcess (CDKMENTRY *mentry, PROCESSFN callback, void * data); void setCDKMentryPostProcess (CDKMENTRY *mentry, PROCESSFN callback, void * data); void bindCDKObject (EObjectType widgetType, void *object, chtype key, BINDFN function, void *data);
DESCRIPTION
The Cdk mentry widget creates a multiple line entry box with a label and an entry field. The following are func- tions which create or manipulate the Cdk mentry box wid- get.
AVAILABLE FUNCTIONS
CDKMENTRY *newCDKMentry (CDKSCREEN *screen, int xpos, int ypos, char *title, char *label, chtype fieldAttribute, chtype fillerCharacter, chtype displayType, int 24 April 1997 2 cdk_mentry(3) cdk_mentry(3) fieldWidth, int fieldRows, int logicalRows, int minimum- Length, boolean box, boolean shadow); This function creates a pointer to a mentry 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 title parameter is the string which will be dis- played 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 label parameter is the string which will be displayed in the label of the mentry field. The fieldAttribute is the attribute of the char- acters to be displayed when they are typed in. filler is the character which is to be displayed in an empty space in the mentry field. The parameter 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 24 April 1997 3 cdk_mentry(3) cdk_mentry(3) 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. The parameters 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. While logicalRows states how many rows the mentry field will have. The parameter minimumLength states how many characters have to be entered before the use can exit the mentry field. The callBackFunction is where the use can swap out the key processing element of the widget. 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. char *activateCDKMentry (CDKMENTRY *mentry, chtype *actions); This function 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 charac- ters 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 structure member exitType will be set to vNORMAL. If the character entered was ESCAPE then the function will returns NULL pointer and the structure member exitType is set to vESCAPE_HIT. char *injectCDKMentry (CDKMENTRY *mentry, chtype charac- ter); This function injects a single character into the wid- get. The parameter mentry is a pointer to a non-NULL mentry. The parameter character is the character to 24 April 1997 4 cdk_mentry(3) cdk_mentry(3) inject into the widget. If the character injected into this widget was RETURN or TAB then this function will return a char * representing the information typed into the widget and the structure member exitType will be set to vNORMAL. If the character entered was ESCAPE then the function will returns NULL pointer and the structure member exitType is set to vESCAPE_HIT. Any other character injected into the widget will set the structure member exitType to vEARLY_EXIT and the func- tion will return a NULL pointer. void setCDKMentry (CDKMENTRY *mentry, char *value, int minimumLength, boolean box); This function lets the programmer modify certain ele- ments of an already defined entry widget. The parameter names correspond to the same parameter names listed in the newCDKMentry function. void setCDKMentryValue (CDKMENTRY *mentry, char *value); This sets the current value of the widget. char *getCDKMentryValue (CDKMENTRY *mentry); This returns the current value of the widget. void setCDKMentryMin (CDKMENTRY *mentry, int maximum); This sets the minimum length of the string that the widget will allow. int getCDKMentryMin (CDKMENTRY *mentry); This returns the minimum length of a string the widget will allow. void setCDKMentryFillerChar (CDKMENTRY *mentry, chtype filler); This sets the character to use when drawing unused space in the field. chtype getCDKMentryFillerChar (CDKMENTRY *mentry); This returns the character being used to draw unused space in the widget. void setCDKMentryBox (CDKMENTRY *mentry, boolean boxWid- get); This sets whether or not the widget will be draw with a box around it. boolean getCDKMentryBox (CDKMENTRY *mentry); This returns whether or not the widget will be drawn with a box around it. void setCDKMentryULChar (CDKMENTRY *mentry, chtype charac- ter); This function sets the upper left hand corner of the widgets box to the given character. 24 April 1997 5 cdk_mentry(3) cdk_mentry(3) void setCDKMentryURChar (CDKMENTRY *mentry, chtype charac- ter); This function sets the upper right hand corner of the widgets box to the given character. void setCDKMentryLLChar (CDKMENTRY *mentry, chtype charac- ter); This function sets the lower left hand corner of the widgets box to the given character. void setCDKMentryLRChar (CDKMENTRY *mentry, chtype charac- ter); This function sets the lower right hand corner of the widgets box to the given character. void setCDKMentryVerticalChar (CDKMENTRY *mentry, chtype character); This function sets the vertical drawing character for the box to the given character. void setCDKMentryHorizontalChar (CDKMENTRY *mentry, chtype character); This function sets the horizontal drawing character for the box to the given character. void setCDKMentryBoxAttribute (CDKMENTRY *mentry, chtype attribute); This function sets the attribute of the box. void setCDKMentryBackgroundColor (CDKMENTRY *mentry, 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_dis- play manual page. void setCDKMentryCB (CDKMENTRY *mentry, MENTRYCB callback- Function); This function allows the programmer to set a different widget input handler. The parameter callbackFunction is of type MENTRYCB. The current default function is CDKMentryCallBack. void moveCDKMentry (CDKMENTRY *mentry, int xpos, int ypos, boolean relative, boolean refresh); This function moves the given widget to the given posi- tion. 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 = 24 April 1997 6 cdk_mentry(3) cdk_mentry(3) 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. (weird 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 positionCDKMentry (CDKMENTRY *mentry); 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 drawCDKMentry(CDKMENTRY *mentry, boolean box); This function draws the widget on the screen. The 24 April 1997 7 cdk_mentry(3) cdk_mentry(3) box option draws the widget with or without a box. void eraseCDKMentry (CDKMENTRY *mentry); This function removes the widget from the screen. This does NOT destroy the widget. void cleanCDKMentry (CDKMENTRY *mentry); This function clears the information from the field. void destroyCDKMentry (CDKMENTRY *mentry); This function removes the widget from the screen and frees up any memory the object may be using. void setCDKMentryPreProcess (CDKMENTRY *mentry, PRO- CESSFN 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 func- tion if of type PROCESSFN. The parameter data is a pointer to void. To learn more about pre-pro- cessing read the cdk_process manual page. void setCDKMentryPostProcess (CDKMENTRY *mentry, 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. The object parameter is the pointer to the widget object. The widgetType parameter is a defined type which states what Cdk object type is being used. To learn more about the type EOb- jectType 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 param- eter data is a pointer to any data that needs to get passed to the callback function.
KEY BINDINGS
When the widget is activated there are several default key bindings which will help the user enter or manipulate the 24 April 1997 8 cdk_mentry(3) cdk_mentry(3) information quickly. The following table outlines the keys and their actions for this widget. Key Action Left Arrow Moves the cursor the the left. CTRL-B Moves the cursor the the left. Right Arrow Moves the cursor the the right. CTRL-F Moves the cursor the the right. Up Arrow Moves the cursor one row down. Down Arrow Moves the cursor one row up. 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. 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 begining of the entry field. CTRL-E Moves the cursor to the end of the entry field. CTRL-T Transposes the characer 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 structure member 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 structure member exitType in the widget pointer to vNORMAL. Escape Exits the widget and returns a NULL pointer. It also sets the structure member exitType in the widget pointer to the value of vESCAPE_HIT. Ctrl-L Refreshes the screen.
SEE ALSO
cdk(3), cdk_binding(3), cdk_display(3), cdk_screen(3)
NOTES
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. 24 April 1997 9
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