cdk_alphalist(3) cdk_alphalist(3)
NAME
newCDKAlphalist, activateCDKAlphalist, injectCDKAlphalist, setCDKAlphalist, setCDKAlphalistContents, getCDKAlphalist- Contents, setCDKAlphalistFillerChar, getCDKAlphalist- FillerChar, setCDKAlphalistContents, getCDKAlphalistCon- tents, setCDKAlphalistHighlight, getCDKAlphalistHighlight, setCDKAlphalistBox, getCDKAlphalistBox, setCDKAlphalis- tULChar, setCDKAlphalistURChar, setCDKAlphalistLLChar, setCDKAlphalistLRChar, setCDKAlphalistVerticalChar, setCD- KAlphalistHorizontalChar, setCDKAlphalistBoxAttribute, setCDKAlphalistBackgroundColor, moveCDKAlphalist, posi- tionCDKAlphalist, drawCDKAlphalist, eraseCDKAlphalist, destroyCDKAlphalist, setCDKAlphalistPreProcess, setCD- KAlphalistPostProcess - Creates a managed curses sorted alphabet list widget.
SYNOPSIS
cc [ flag ... ] file ... -lcdk [ library ... ] #include <cdk.h> CDKALPHALIST *newCDKAlphalist (CDKSCREEN *cdkscreen, int xpos, int ypos, int height, int width, char * title, char * label, char ** list, int listSize, chtype fillerCharac- ter, chtype highlight, boolean box, boolean shadow); char *activateCDKAlphalist (CDKALPHALIST *alphalist, chtype *actions); char *injectCDKAlphalist (CDKALPHALIST *alphalist, chtype input); void setCDKAlphalist (CDKALPHALIST *alphalist, char ** list, int listSize, chtype fillerCharacter, chtype high- light, boolean box); void setCDKAlphalistContents (CDKALPHALIST *alphalist, char ** list, int listSize); char **getCDKAlphalistContents (CDKALPHALIST *alphalist); void setCDKAlphalistFillerChar (CDKALPHALIST *alphalist, chtype fillerCharacter); chtype getCDKAlphalistFillerChar (CDKALPHALIST *alphal- ist); void setCDKAlphalistHighlight (CDKALPHALIST *alphalist, chtype highlight); chtype setCDKAlphalistHighlight (CDKALPHALIST *alphalist); void setCDKAlphalistBox (CDKALPHALIST *alphalist, boolean box); 24 April 1997 1 cdk_alphalist(3) cdk_alphalist(3) boolean getCDKAlphalistBox (CDKALPHALIST *alphalist); void setCDKAlphalistULChar (CDKALPHALIST *,alphalist, chtype character); void setCDKAlphalistURChar (CDKALPHALIST *,alphalist, chtype character); void setCDKAlphalistLLChar (CDKALPHALIST *,alphalist, chtype character); void setCDKAlphalistLRChar (CDKALPHALIST *,alphalist, chtype character); void setCDKAlphalistVerticalChar (CDKALPHALIST *,alphal- ist, chtype character); void setCDKAlphalistHorizontalChar (CDKALPHALIST *,alphal- ist, chtype character); void setCDKAlphalistBoxAttribute (CDKALPHALIST *,alphal- ist, chtype character); void setCDKAlphalistBackgroundColor (CDKALPHALIST *,alphalist, char * color); void moveCDKAlphalist (CDKALPHALIST *alphalist, int box, int box, boolean relative, boolean refresh); void positionCDKAlphalist (CDKALPHALIST *alphalist); void drawCDKAlphalist (CDKALPHALIST *alphalist, boolean box); void eraseCDKAlphalist (CDKALPHALIST *alphalist); void destroyCDKAlphalist (CDKALPHALIST *alphalist); void setCDKAlphalistPreProcess (CDKALPHALIST *alphalist, PROCESSFN callback, void * data); void setCDKAlphalistPostProcess (CDKALPHALIST *alphalist, PROCESSFN callback, void * data); void bindCDKObject (EObjectType widgetType, void *object, chtype key, BINDFN function, void *data);
DESCRIPTION
The Cdk alphalist allows a user to select from a list of alphabetically sorted words. The user can use the arrow keys to traverse through the list or type in the beginning of the word and the list will automatically adjust itself in the correct place in the scrolling list. This widget, like the file selector widget, is a compound widget of 24 April 1997 2 cdk_alphalist(3) cdk_alphalist(3) both the entry field widget and the scrolling list widget.
AVAILABLE FUNCTIONS
CDKALPHALIST *newCDKAlphalist (CDKSCREEN * screen, int xpos, int ypos, int height, int width, char *title, char *label, char **list, int listSize, chtype fillerChar, chtype highlight, boolean box, boolean shadow); This function creates a pointer to an alphalist widget. The screen parameter is the screen you wish this widget to be placed in. The parameter xpos controls the place- ment of the object along the horizontal axis. This parameter can take an integer value or one of the pre- defined values of LEFT, RIGHT, and CENTER. The parame- ter 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 height and width control the height and width of the widget. If you provide a value of zero for either of the height or the width, the wid- get will be created with the full width and height of the screen. If you provide a negative value, the widget will be created the full height or width minus the value provided. The title parameter is the string which will be displayed at the top of the scrolling list. The title can be more than one line; just provide a car- riage return character at the line break. The label parameter is the string which will be displayed in the label of the entry field. The parameter list is the list of words which will be displayed in the scrolling list. This list does not have to be sorted, this widget automatically sorts the list. The parameter listSize tells the widget how large the word list is. The field fillerCharacter is the character which is to be dis- played in an empty space in the entry field. The field highlight is the attribute of the highlight bar in the scrolling list. 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 *activateCDKAlphalist (CDKALPHALIST *alphalist, chtype *actions); This function activates the alphalist widget and lets the user interact with the widget. The parameter alphalist is a pointer to a non-NULL alphalist 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 a char * of the information which was typed in the field. If the TAB character is hit then the 24 April 1997 3 cdk_alphalist(3) cdk_alphalist(3) widget will try to complete the word in the entry field. If the widget is exited with the RETURN charac- ter then the structure member exitType will be set to vNORMAL. If the widget was exited with the ESCAPE key then the structure member exitType will be set to vESCAPE_HIT and the widget returns NULL. char *injectCDKAlphalist (CDKALPHALIST *alphalist, chtype character); This function injects a single character into the wid- get. The parameter alphalist is a pointer to a non-NULL alphalist widget. The parameter character is the char- acter to inject into the widget. If the character injected into this widget was RETURN then the informa- tion in the entry field of this widget will be returned and the structure member exitType will be set to vNOR- MAL. If the character injected was ESCAPE then the wid- get will exit, return a NULL pointer, and set the structure member exitType to vESCAPE_HIT. Any other character injected into the widget will set the struc- ture member exitType to a value of vEARLY_EXIT and a NULL pointer will be returned. void setCDKAlphalist (CDKALPHALIST *alphalist, char **list, int listSize, chtype fillerCharacter, chtype high- light, boolean box); This function lets the programmer modify certain ele- ments of an already defined alphalist widget. The parameter names correspond to the same parameter names listed in the newCDKAlphalist function. void setCDKAlphalistContents (CDKALPHALIST *alphalist, char **list, int listSize); This function sets the contents of the alphalist wid- get. char **getCDKAlphalistContents (CDKALPHALIST *alphalist); This function returns the contents of the alphalist. void setCDKAlphalistFillerChar (CDKALPHALIST *alphalist, chtype filler); This sets the character to use when drawing the entry field portion of the widget. chtype getCDKAlphalistFillerChar (CDKALPHALIST *alphal- ist); This returns the character being used as the filler character in the entry field portion of the widget. void setCDKAlphalistHighlight (CDKALPHALIST *alphalist, chtype highlight); This function sets the attribute of the highlight bar of the scrolling list portion of the widget. 24 April 1997 4 cdk_alphalist(3) cdk_alphalist(3) chtype getCDKAlphalistHighlight (CDKALPHALIST *alphalist); This returns the attribute of the highlight bar of the scrolling list portion of the widget. void setCDKAlphalistBox (CDKALPHALIST *alphalist, boolean boxWidget); This sets whether or not the widget will be draw with a box around it. boolean getCDKAlphalistBox (CDKALPHALIST *alphalist); This returns whether or not the widget will be drawn with a box around it. void setCDKAlphalistULChar (CDKALPHALIST *alphalist, chtype character); This function sets the upper left hand corner of the widgets box to the given character. void setCDKAlphalistURChar (CDKALPHALIST *alphalist, chtype character); This function sets the upper right hand corner of the widgets box to the given character. void setCDKAlphalistLLChar (CDKALPHALIST *alphalist, chtype character); This function sets the lower left hand corner of the widgets box to the given character. void setCDKAlphalistLRChar (CDKALPHALIST *alphalist, chtype character); This function sets the lower right hand corner of the widgets box to the given character. void setCDKAlphalistVerticalChar (CDKALPHALIST *alphalist, chtype character); This function sets the vertical drawing character for the box to the given character. void setCDKAlphalistHorizontalChar (CDKALPHALIST *alphal- ist, chtype character); This function sets the horizontal drawing character for the box to the given character. void setCDKAlphalistBoxAttribute (CDKALPHALIST *alphalist, chtype attribute); This function sets the attribute of the box. void setCDKAlphalistBackgroundColor (CDKALPHALIST *alphal- ist, 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. 24 April 1997 5 cdk_alphalist(3) cdk_alphalist(3) void moveCDKAlphalist (CDKALPHALIST *alphalist, 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 = 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 positionCDKAlphalist (CDKALPHALIST *alphalist); 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. 24 April 1997 6 cdk_alphalist(3) cdk_alphalist(3) 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 drawCDKAlphalist (CDKALPHALIST *alphalist, boolean box); This function draws the alphalist widget on the screen. The box option draws the widget with or without a box. void eraseCDKAlphalist (CDKALPHALIST *alphalist); This function removes the widget from the screen. This does NOT destroy the widget. void destroyCDKAlphalist (CDKALPHALIST *alphalist); This function removes the widget from the screen and frees up any memory the object may be using. void setCDKAlphalistPreProcess (CDKALPHALIST *alphal- ist, 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 setCDKAlphalistPostProcess (CDKALPHALIST *alphal- ist, 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 PRO- CESSFN. The parameter data is a pointer to void. To learn more about post-processing read the cdk_pro- cess 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 charac- ter to bind. The function is the function type. To learn more about the key binding call-back 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 call-back function. 24 April 1997 7 cdk_alphalist(3) cdk_alphalist(3)
KEY BINDINGS
When the widget is activated there are several default key bindings which will help the user enter or manipulate the information quickly. Since this widget is built from both the scrolling list widget and the entry field widget, the key bindings are the same for the respective fields. The extra key bindings are listed below. Key Bindings Key Action Up Arrow Scrolls the scrolling list up one line. Down Arrow Scrolls the scrolling list down one line. Page Up Scrolls the scrolling list up one page. CTRL-B Scrolls the scrolling list up one page. Page Down Scrolls the scrolling list down one page. CTRL-F Scrolls the scrolling list down one page. Tab Tries to complete the word in the entry field. If the word segment is not unique then the widget will beep and present a list of close matches. Return Returns the word in the entry field. It also sets the structure member exitType in the widget pointer to the value of 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.
SEE ALSO
cdk(3), cdk_binding(3), cdk_display(3), cdk_screen(3)
NOTES
This widget is created from the scrolling list widget and the entry field widget. This is a good example on how to build your own widgets using the base widgets provided in this distribution. 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 8
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