.de It .br .ie \\n(.$>=3 .ne \\$3 .el .ne 3 .IP "\\$1" \\$2 .. .TH cdk_scroll 3 "24 April 1997" .SH NAME newCDKScroll, activateCDKScroll, injectCDKScroll, setCDKScroll, setCDKScrollItems, getCDKScrollItems, setCDKScrollHighlight, getCDKScrollHighlight, setCDKScrollBox, getCDKScrollBox, setCDKScrollULChar, setCDKScrollURChar, setCDKScrollLLChar, setCDKScrollLRChar, setCDKScrollVerticalChar, setCDKScrollHorizontalChar, setCDKScrollBoxAttribute, setCDKScrollBackgroundColor, drawCDKScroll, eraseCDKScroll, destroyCDKScroll, setCDKScrollPreProcess, setCDKScrollPostProcess \- Creates a managed curses scrolling list widget. .SH SYNOPSIS .LP .B cc .RI "[ " "flag" " \|.\|.\|. ] " "file" " \|.\|.\|." .B \-lcdk .RI "[ " "library" " \|.\|.\|. ]" .LP #include .LP .BI "CDKSCROLL *newCDKScroll (CDKSCREEN *" "cdkscreen", .BI "int " "xpos", .BI "int " "ypos", .BI "int " "spos", .BI "int " "height", .BI "int " "width", .BI "char *" "title", .BI "char **" "scrollList", .BI "int " "scrollListLength", .BI "boolean " "numbers", .BI "chtype " "highlight", .BI "boolean " "box", .BI "boolean " "shadow"); .LP .BI "int activateCDKScroll (CDKSCROLL *" "scroll", .BI "chtype * " "actions"); .LP .BI "int injectCDKScroll (CDKSCROLL *" "scroll", .BI "chtype " "input"); .LP .BI "void setCDKScroll (CDKSCROLL *" "scroll", .BI "char *" "value", .BI "int " "minimumLength", .BI "int " "maximumLength", .BI "boolean " "box"); .LP .BI "void setCDKScrollItems (CDKSCROLL *" "scroll", .BI "char **" "itemList", .BI "int " "listSize", .BI "boolean " "numbers"); .LP .BI "int getCDKScrollItems (CDKSCROLL *" "scroll", .BI "char **" "itemList"); .LP .BI "void setCDKScrollHighlight (CDKSCROLL *" "scroll", .BI "chtype " "highlight"); .LP .BI "chtype getCDKScrollHighlight (CDKSCROLL *" "scroll"); .LP .BI "void setCDKScrollBox (CDKSCROLL *" "scroll", .BI "boolean " "box"); .LP .BI "boolean getCDKScrollBox (CDKSCROLL *" "scroll"); .LP .BI "void addCDKScrollItem (CDKSCROLL *" "scroll", .BI "char *" "item"); .LP .BI "void deleteCDKScrollItem (CDKSCROLL *" "scroll", .BI "int " "position"); .LP .BI "void setCDKScrollULChar (CDKSCROLL *", "scroll", .BI "chtype " "character"); .LP .BI "void setCDKScrollURChar (CDKSCROLL *", "scroll", .BI "chtype " "character"); .LP .BI "void setCDKScrollLLChar (CDKSCROLL *", "scroll", .BI "chtype " "character"); .LP .BI "void setCDKScrollLRChar (CDKSCROLL *", "scroll", .BI "chtype " "character"); .LP .BI "void setCDKScrollVerticalChar (CDKSCROLL *", "scroll", .BI "chtype " "character"); .LP .BI "void setCDKScrollHorizontalChar (CDKSCROLL *", "scroll", .BI "chtype " "character"); .LP .BI "void setCDKScrollBoxAttribute (CDKSCROLL *", "scroll", .BI "chtype " "character"); .LP .BI "void setCDKScrollBackgroundColor (CDKSCROLL *", "scroll", .BI "char * " "color"); .LP .BI "void moveCDKScroll (CDKSCROLL *" "scroll", .BI "int " "box", .BI "int " "box", .BI "boolean " "relative", .BI "boolean " "refresh"); .LP .BI "void positionCDKScroll (CDKSCROLL *" "scroll"); .LP .BI "void drawCDKScroll (CDKSCROLL *" "scroll", .BI "boolean " "box"); .LP .BI "void eraseCDKScroll (CDKSCROLL *" "scroll"); .LP .BI "void destroyCDKScroll (CDKSCROLL *" "scroll"); .LP .BI "void setCDKScrollPreProcess (CDKSCROLL *" "scroll", .BI "PROCESSFN " "callback", .BI "void * " "data"); .LP .BI "void setCDKScrollPostProcess (CDKSCROLL *" "scroll", .BI "PROCESSFN " "callback", .BI "void * " "data"); .LP .BI "void bindCDKObject (EObjectType " "widgetType", .BI "void *" "object", .BI "chtype " "key", .BI "BINDFN " "function", .BI "void *" "data"); .SH DESCRIPTION The Cdk scroll widget creates a scrolling list. The following are functions which create or manipulate the Cdk scrolling list widget. .SH AVAILABLE FUNCTIONS CDKSCROLL *newCDKScroll (CDKSCREEN *\f2screen\f1, int \f2xpos\f1, int \f2ypos\f1, int \f2spos\f1, int \f2height\f1, int \f2width\f1, char *\f2title\f1, char **\f2scrollList\f1, int \f2scrollListLength\f1, boolean \f2numbers\f1, chtype \f2highlight\f1, boolean \f2box\f1, boolean \f2shadow\f1); .RS 3 This function creates a pointer to a scroll widget. The \f2screen\f1 parameter is the screen you wish this widget to be placed in. The parameter \f2xpos\f1 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 \f4LEFT\f1, \f4RIGHT\f1, and \f4CENTER\f1. The parameter \f2ypos\f1 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 \f4TOP\f1, \f4BOTTOM\f1, and \f4CENTER\f1. The parameter \f2spos\f1 is where the scroll bar is to be placed. This can accept one of three values: \f4LEFT\f1, which puts the scroll bar on the left of the scrolling list. \f4RIGHT\f1 which puts the scroll bar on the right side of the list, and \f4NONE\f1 which does not add a scroll bar. The parameters \f2height\f1 and \f2width\f1 control the height and width of the widget. If you provide a value of zero for either of the height or the width, the widget 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 \f2title\f1 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 carriage return character at the line break. The parameter \f2scrollList\f1 is the list of items to be displayed in the scrolling list; \f2scrollListLength\f1 is the number of elements in the given list. The parameter \f2numbers\f1 is a boolean value stating that you want the items in the list to have a number attached to the front of the list items. The \f2highlight\f1 parameter specifies the display attribute of the currently selected item. The \f2box\f1 parameter states whether the widget will be drawn with a box around it or not. The \f2shadow\f1 parameter accepts a boolean value to turn the shadow on or off around this widget. If the widget could not be created then a \f4NULL\f1 pointer is returned. .RE int activateCDKScroll (CDKSCROLL *\f2scroll\f1, chtype *\f2actions\f1); .RS 3 This function activates the scroll widget and lets the user interact with the widget. The parameter \f2scroll\f1 is a pointer to a non-NULL scroll widget. If the \f2actions\f1 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 \f4NULL\f1 pointer for \f2actions\f1. If the character entered into this widget is \f4RETURN\f1 or \f4TAB\f1 then this function will return a value from 0 to the number of items-1, representing the item selected. It will also set the structure member \f4exitType\f1 to \f4vNORMAL\f1. If the character entered into this widget was \f4ESCAPE\f1 then the widget will return a value of -1 and the structure member \f4exitType\f1 will be set to \f4vESCAPE_HIT\f1. .RE int injectCDKScroll (CDKSCROLL *\f2scroll\f1, chtype \f2character\f1); .RS 3 This function injects a single character into the widget. The parameter \f2scroll\f1 is a pointer to a non-NULL scroll widget. The parameter \f2character\f1 is the character to inject into the widget. If the character injected into this widget was \f4RETURN\f1 then the character injected into this widget is \f4RETURN\f1 or \f4TAB\f1 then this function will return a value from 0 to the number of items-1, representing the item selected. It will also set the structure member \f4exitType\f1 to \f4vNORMAL\f1. If the character entered into this widget was \f4ESCAPE\f1 then the widget will return a value of -1 and the structure member \f4exitType\f1 will be set to \f4vESCAPE_HIT\f1. Any other character injected into the widget will set the structure member \f4exitType\f1 to \f4vEARLY_EXIT\f1 and the function will return -1. .RE void setCDKScroll (CDKSCROLL *\f2scroll\f1, char **\f2scrollList\f1, int \f2scrollListLength\f1, boolean \f2numbers\f1, chtype \f2highlight\f1, boolean \f2box\f1); .RS 3 This function lets the programmer modify certain elements of an already defined scroll widget. The parameter names correspond to the same parameter names listed in the \f4newCDKScroll\f1 function. .RE void setCDKScrollItems (CDKSCROLL *\f2scroll\f1, char **\f2itemList\f1, int \f2listSize\f1, boolean \f2numbers\f1); .RS 3 This function sets the contents of the scrolling list. .RE int getCDKScrollItems (CDKSCROLL *\f2scroll\f1, char **\f2itemList\f1); .RS 3 This fills the parameter \f2itemList\f1 with the contents of the scrolling list. It returns the number of elements in the scrolling list. .RE void setCDKScrollHighlight (CDKSCROLL *\f2scroll\f1, chtype \f2highlight\f1); .RS 3 This sets the attribute of the highlight bar. .RE chtype getCDKScrollHighlight (CDKSCROLL *\f2scroll\f1); .RS 3 This returns the attribute of the highlight bar. .RE void setCDKScrollBox (CDKSCROLL *\f2scroll\f1, boolean \f2boxWidget\f1); .RS 3 This sets whether or not the widget will be draw with a box around it. .RE boolean getCDKScrollBox (CDKSCROLL *\f2scroll\f1); .RS 3 This returns whether or not the widget will be drawn with a box around it. .RE void addCDKScrollItem (CDKSCROLL *\f2scroll\f1, char *\f2item\f1); .RS 3 This function allows the user to add an item into an already defined scrolling list. The \f2scroll\f1 parameter is a pointer to the scrolling list to add the item to. The parameter \f2item\f1 is a \f4char *\f1 representing the new item to add. The item is always added to the end of the list. .RE void deleteCDKScrollItem (CDKSCROLL *\f2scroll\f1, int \f2position\f1); .RS 3 This function allows the user to add an item into an already defined scrolling list. The \f2scroll\f1 parameter is a pointer to the scrolling list to add the item to. The parameter \f2f2position\f1 is an \f4int\f1 which specifies which element to remove. .RE void setCDKScrollULChar (CDKSCROLL *\f2scroll\f1, chtype \f2character\f1); .RS 3 This function sets the upper left hand corner of the widgets box to the given character. .RE void setCDKScrollURChar (CDKSCROLL *\f2scroll\f1, chtype \f2character\f1); .RS 3 This function sets the upper right hand corner of the widgets box to the given character. .RE void setCDKScrollLLChar (CDKSCROLL *\f2scroll\f1, chtype \f2character\f1); .RS 3 This function sets the lower left hand corner of the widgets box to the given character. .RE void setCDKScrollLRChar (CDKSCROLL *\f2scroll\f1, chtype \f2character\f1); .RS 3 This function sets the lower right hand corner of the widgets box to the given character. .RE void setCDKScrollVerticalChar (CDKSCROLL *\f2scroll\f1, chtype \f2character\f1); .RS 3 This function sets the vertical drawing character for the box to the given character. .RE void setCDKScrollHorizontalChar (CDKSCROLL *\f2scroll\f1, chtype \f2character\f1); .RS 3 This function sets the horizontal drawing character for the box to the given character. .RE void setCDKScrollBoxAttribute (CDKSCROLL *\f2scroll\f1, chtype \f2attribute\f1); .RS 3 This function sets the attribute of the box. .RE void setCDKScrollBackgroundColor (CDKSCROLL *\f2scroll\f1, char *\f2color\f1); .RS 3 This sets the background color of the widget. The parameter \f2color\f1 is in the format of the Cdk format strings. To get more information look at the \f4cdk_display\f1 manual page. .RE void moveCDKScroll (CDKSCROLL *\f2scroll\f1, int \f2xpos\f1, int \f2ypos\f1, boolean \f2relative\f1, boolean \f2refresh\f1); .RS 3 This function moves the given widget to the given position. The parameters \f2xpos\f1 and \f2ypos\f1 is the new position of the widget. The parameter \f2xpos\f1 can accept an integer value or one of the pre-defined values of \f4TOP\f1, \f4BOTTOM\f1, and \f4CENTER\f1. The parameter \f2ypos\f1 can accept an integer value or one of the pre-defined values of \f4LEFT\f1, \f4RIGHT\f1, and \f4CENTER\f1. The parameter \f2relative\f1 states whether the \f2xpos\f1/\f2ypos\f1 pair is a relative move or an absolute move. For example if \f2xpos\f1 = 1 and \f2ypos\f1 = 2 and \f2relative\f1 = \f2TRUE\f1, then the widget would move one row down and two columns right. If the value of \f2relative\f1 was \f2FALSE\f1 then the widget would move to the position (1,2). Do not use the values of \f4TOP\f1, \f4BOTTOM\f1, \f4LEFT\f1, \f4RIGHT\f1, or \f4CENTER\f1 when \f2relative\f1 = \f4TRUE\f1. (weird things may happen). The final parameter \f2refresh\f1 is a boolean value which states whether the widget will get refreshed after the move or not. .RE void positionCDKScroll (CDKSCROLL *\f2scroll\f1); .RS 3 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. .LP .nf \f4Key Bindings\f1 .RS 3 \f2Key Action\f1 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 its original position. Return Exits the function and leaves the widget where it was. .fi .RE .RS 3 .LP 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.) .LP void drawCDKScroll (CDKSCROLL *\f2scroll\f1, boolean \f2box\f1); .RS 3 This function draws the scroll widget on the screen. The \f2box\f1 option draws the widget with or without a box. .RE void eraseCDKScroll (CDKSCROLL *\f2scroll\f1); .RS 3 This function removes the widget from the screen. This does \f4NOT\f1 destroy the widget. .RE void destroyCDKScroll (CDKSCROLL *\f2scroll\f1); .RS 3 This function removes the widget from the screen and frees up any memory the object may be using. .RE void setCDKScrollPreProcess (CDKSCROLL *\f2scroll\f1, PROCESSFN \f2function\f1, void *\f2data\f1); .RS 3 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 \f2function\f1 if of type \f4PROCESSFN\f1. The parameter \f2data\f1 is a pointer to \f4void\f1. To learn more about pre-processing read the \f4cdk_process\f1 manual page. .RE void setCDKScrollPostProcess (CDKSCROLL *\f2scroll\f1, PROCESSFN \f2function\f1, void *\f2data\f1); .RS 3 This function allows the user to have the widget call a function after the key has been applied to the widget. The parameter \f2function\f1 if of type \f4PROCESSFN\f1. The parameter \f2data\f1 is a pointer to \f4void\f1. To learn more about post-processing read the \f4cdk_process\f1 manual page. .RE void bindCDKObject (EObjectType \f2widgetType\f1, void *\f2object\f1, char \f2key\f1, BINDFN \f2function\f1, void *\f2data\f1); .RS 3 This function allows the user to create special key bindings. The \f2widgetType\f1 parameter is a defined type which states what Cdk object type is being used. To learn more about the type \f4EObjectType\f1 read the \f4cdk_binding\f1 manual page. The \f2object\f1 parameter is the pointer to the widget object. The \f2key\f1 is the character to bind. The \f2function\f1 is the function type. To learn more about the key binding callback function types read the \f4cdk_binding\f1 manual page. The last parameter \f2data\f1 is a pointer to any data that needs to get passed to the callback function. .RE .SH 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. .LP .nf .RS 3 \f2Key Action\f1 Left Arrow Shifts the whole list left one character. Right Arrow Shifts the whole list right one character. Up Arrow Selects the next item up in the list. Down Arrow Selects the next item down in the list. Prev Page Moves one page backwards. Ctrl-B Moves one page backwards. Next Page Moves one page forwards. Ctrl-F Moves one page forwards. g Moves to the first element in the list. 1 Moves to the first element in the list. G Moves to the last element in the list. $ Shifts the whole list to the far right. | Shifts the whole list to the far left. Return Exits the widget and returns an integer value representing which item was selected. This also sets the structure member \f4exitType\f1 in the widget pointer to the value of \f4vNORMAL\f1. Tab Exits the widget and returns an integer value representing which item was selected. This also sets the structure member \f4exitType\f1 in the widget pointer to the value of \f4vNORMAL\f1. Escape Exits the widget and returns -1. This also sets the structure member \f4exitType\f1 in the widget pointer to the value of \f4vESCAPE_HIT\f1. Ctrl-L Refreshes the screen. .RE .fi .SH SEE ALSO .BR cdk (3), .BR cdk_binding (3), .BR cdk_display (3), .BR cdk_screen (3) .SH NOTES .PP The header file \f4\f1 automatically includes the header files \f4\f1, \f4\f1, \f4\f1, \f4\f1, \f4\f1, \f4\f1, \f4\f1, \f4\f1, \f4\f1, \f4\f1, \f4\f1, and \f4\f1. The \f4\f1 header file includes \f4\f1 and \f4\f1. .PP If you have \f4Ncurses\f1 installed on your machine add -DNCURSES to the compile line to include the Ncurses header files instead.