cdk_itemlist(3) cdk_itemlist(3)
NAME
newCDKItemlist, activateCDKItemlist, injectCDKItemlist, setCDKItemlist, setCDKItemlistValues, getCDKItemlistVal- ues, setCDKItemlistDefaultItem, getCDKItemlistDefaultItem, setCDKItemlistCurrentItem, getCDKItemlistCurrentItem, setCDKItemlistBox, getCDKItemlistBox, setCDKItemlis- tULChar, setCDKItemlistURChar, setCDKItemlistLLChar, setCDKItemlistLRChar, setCDKItemlistVerticalChar, setCD- KItemlistHorizontalChar, setCDKItemlistBoxAttribute, setCDKItemlistBackgroundColor, drawCDKItemlist, eraseCD- KItemlist, cleanCDKItemlist, destroyCDKItemlist, setCD- KItemlistPreProcess, setCDKItemlsitPostProcess - Creates a managed curses itemlist widget.
SYNOPSIS
cc [ flag ... ] file ... -lcdk [ library ... ] #include <cdk.h> CDKITEMLIST *newCDKItemlist (CDKSCREEN *cdkscreen, int xpos, int ypos, char *title, char *label, char **itemList, int itemCount, int defaultItem, boolean box, boolean shadow); int activateCDKItemlist (CDKITEMLIST *itemlist, chtype *actions); int injectCDKItemlist (CDKITEMLIST *,itemlist, chtype input); void setCDKItemlist (CDKITEMLIST *itemlist, char **item- List, int itemCount, int currentSelection, boolean box); void setCDKItemlistValues (CDKITEMLIST *itemlist, char **itemList, int itemCount); char **getCDKItemlistValues (CDKITEMLIST *itemlist, int *listSize); void setCDKItemlistDefaultItem (CDKITEMLIST *itemlist, int defaultItem); int getCDKItemlistDefaultItem (CDKITEMLIST *itemlist); void setCDKItemlistCurrentItem (CDKITEMLIST *itemlist, int currentItem); int getCDKItemlistCurrentItem (CDKITEMLIST *itemlist); void setCDKItemlistBox (CDKITEMLIST *itemlist, boolean box); boolean getCDKItemlistBox (CDKITEMLIST *itemlist); 24 April 1997 1 cdk_itemlist(3) cdk_itemlist(3) void setCDKItemlistULChar (CDKITEMLIST *,itemlist, chtype character); void setCDKItemlistURChar (CDKITEMLIST *,itemlist, chtype character); void setCDKItemlistLLChar (CDKITEMLIST *,itemlist, chtype character); void setCDKItemlistLRChar (CDKITEMLIST *,itemlist, chtype character); void setCDKItemlistVerticalChar (CDKITEMLIST *,itemlist, chtype character); void setCDKItemlistHorizontalChar (CDKITEMLIST *,itemlist, chtype character); void setCDKItemlistBoxAttribute (CDKITEMLIST *,itemlist, chtype character); void setCDKItemlistBackgroundColor (CDKITEMLIST *,item- list, char * color); void moveCDKItemlist (CDKITEMLIST *itemlist, int box, int box, boolean relative, boolean refresh); void positionCDKItemlist (CDKITEMLIST *itemlist); void drawCDKItemlist (CDKITEMLIST *itemlist, boolean box); void eraseCDKItemlist (CDKITEMLIST *itemlist); void cleanCDKItemlist (CDKITEMLIST *itemlist); void destroyCDKItemlist (CDKITEMLIST *itemlist); void setCDKItemlistPreProcess (CDKITEMLIST *itemlist, PRO- CESSFNcallback, void *data); void setCDKItemlistPostProcess (CDKITEMLIST *itemlist, PROCESSFNcallback, void *data); void bindCDKObject (EObjectType widgetType, void *object, chtype key, BINDFN function, void *data);
DESCRIPTION
The Cdk itemlist widget creates a widget which allows a user to select from a list of preset character strings. The best examples of something like this are the days of the week or the months of the year. The following are functions which create or manipulate the Cdk itemlist wid- get. 24 April 1997 2 cdk_itemlist(3) cdk_itemlist(3)
AVAILABLE FUNCTIONS
CDKITEMLIST *newCDKItemlist (CDKSCREEN *screen, int xpos, int ypos, char *title, char *label, char **itemList, int itemCount, int defaultItem, boolean box, boolean shadow); This function creates a pointer to an itemlist 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 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 displayed at the top of the widget. 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 itemlist field. The itemList parameter is the list of the strings which will be displayed in the widget; itemCount is the number of elements in the list. The parameter defaultItem is an integer value which represents which string is to be displayed as the default item. 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. int activateCDKItemlist (CDKITEMLIST *itemlist, chtype *actions); This function activates the itemlist widget and lets the user interact with the widget. The parameter item- list is a pointer to a non-NULL itemlist 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 value from 0 to the number of buttons -1, rep- resenting the button selected. 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. int injectCDKItemlist (CDKITEMLIST *itemlist, chtype char- acter); This function injects a single character into the wid- get. The parameter itemlist is a pointer to a non-NULL itemlist widget. The parameter character is the charac- ter to inject into the widget. If the character injected into this widget was RETURN then the character injected into this widget is RETURN or TAB then this 24 April 1997 3 cdk_itemlist(3) cdk_itemlist(3) function will return a value from 0 to the number of buttons -1, representing the button selected. 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 struc- ture member exitType to vEARLY_EXIT and the function will return -1. void setCDKItemlist (CDKITEMLIST *itemlist, char **item- List, int itemCount, int currentSelection, boolean box); This function lets the programmer modify certain ele- ments of an already defined itemlist widget. The param- eter names correspond to the same parameter names listed in the newCDKItemlist function. void setCDKItemlistCurrentItem (CDKITEMLIST *itemlist, int currentItem); This sets the currently displayed item in the widget. int getCDKItemlistCurrentItem (CDKITEMLIST *itemlist); This returns the index of the currently displayed item in the widget. void setCDKItemlistDefaultItem (CDKITEMLIST *itemlist, int defaultItem); This sets the default item in the widget. int getCDKItemlistDefaultItem (CDKITEMLIST *itemlist); This returns the index of the default item in the wid- get. void setCDKItemlistBox (CDKITEMLIST *itemlist, boolean boxWidget); This sets whether or not the widget will be draw with a box around it. boolean getCDKItemlistBox (CDKITEMLIST *itemlist); This returns whether or not the widget will be drawn with a box around it. void setCDKItemlistULChar (CDKITEMLIST *itemlist, chtype character); This function sets the upper left hand corner of the widgets box to the given character. void setCDKItemlistURChar (CDKITEMLIST *itemlist, chtype character); This function sets the upper right hand corner of the widgets box to the given character. void setCDKItemlistLLChar (CDKITEMLIST *itemlist, chtype character); 24 April 1997 4 cdk_itemlist(3) cdk_itemlist(3) This function sets the lower left hand corner of the widgets box to the given character. void setCDKItemlistLRChar (CDKITEMLIST *itemlist, chtype character); This function sets the lower right hand corner of the widgets box to the given character. void setCDKItemlistVerticalChar (CDKITEMLIST *itemlist, chtype character); This function sets the vertical drawing character for the box to the given character. void setCDKItemlistHorizontalChar (CDKITEMLIST *itemlist, chtype character); This function sets the horizontal drawing character for the box to the given character. void setCDKItemlistBoxAttribute (CDKITEMLIST *itemlist, chtype attribute); This function sets the attribute of the box. void setCDKItemlistBackgroundColor (CDKITEMLIST *itemlist, 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 moveCDKItemlist (CDKITEMLIST *itemlist, 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 positionCDKItemlist (CDKITEMLIST *itemlist); 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. 24 April 1997 5 cdk_itemlist(3) cdk_itemlist(3) 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 drawCDKItemlist (CDKITEMLIST *itemlist, boolean box); This function draws the itemlist widget on the screen. The box option draws the widget with or without a box. void eraseCDKItemlist (CDKITEMLIST *itemlist); This function removes the widget from the screen. This does NOT destroy the widget. void destroyCDKItemlist (CDKITEMLIST *itemlist); This function removes the widget from the screen and frees up any memory the object may be using. void setCDKItemlistPreProcess (CDKITEMLIST *item- list, PROCESSFN function, void *data); This function allows the user to have the widget 24 April 1997 6 cdk_itemlist(3) cdk_itemlist(3) 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 setCDKItemlistPostProcess (CDKITEMLIST *item- list, 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 f2widgetType parameter is a defined type which states what Cdk object type is being used. To learn more about the type EObject- Type 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.
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 Cycles the list one to the left and displays it. Down Arrow Cycles the list one to the left and displays it. - Cycles the list one to the left and displays it. p Cycles the list one to the left and displays it. Right Arrow Cycles the list one to the right and displays it. Up Arrow Cycles the list one to the right and displays it. Space Cycles the list one to the right and displays it. + Cycles the list one to the right and displays it. n Cycles the list one to the right and displays it. d Displays the default item. D Displays the default item. 0 Displays the first item in the list. $ Displays the last item in the list. Return Exits the widget and returns an integer value representing the current selection. It also sets the structure member exitType in the widget pointer 24 April 1997 7 cdk_itemlist(3) cdk_itemlist(3) to vNORMAL. Tab Exits the widget and returns an integer value representing the current selection. It also sets the structure member exitType in the widget pointer to vNORMAL. Escape Exits the widget and returns -1. It also sets the structure member exitType in the widget pointer to vESCAPE_HIT. Ctrl-L Refreshes the screen.
SEE ALSO
cdk(3), cdk_binding(3), cdk_display(3), cdk_process(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 8
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