drawCDKItemlist(3)
NAME
cdk_itemlist - curses itemlist widget.
SYNOPSIS
cc [ flag ... ] file ... -lcdk [ library ... ]
#include <cdk.h>
int activateCDKItemlist (
CDKITEMLIST *itemlist,
chtype *actions);
void destroyCDKItemlist (
CDKITEMLIST *itemlist);
void drawCDKItemlist (
CDKITEMLIST *itemlist,
boolean box);
void drawCDKItemlistField (
CDKITEMLIST *itemlist,
boolean highlight);
void eraseCDKItemlist (
CDKITEMLIST *itemlist);
boolean getCDKItemlistBox (
CDKITEMLIST *itemlist);
int getCDKItemlistCurrentItem (
CDKITEMLIST *itemlist);
int getCDKItemlistDefaultItem (
CDKITEMLIST *itemlist);
chtype **getCDKItemlistValues (
CDKITEMLIST *itemlist,
int *listSize);
int injectCDKItemlist (
CDKITEMLIST *itemlist,
chtype input);
void moveCDKItemlist (
CDKITEMLIST *itemlist,
int xpos,
int ypos,
boolean relative,
boolean refresh);
CDKITEMLIST *newCDKItemlist (
CDKSCREEN *cdkscreen,
int xpos,
int ypos,
const char *title,
const char *label,
CDK_CONST char **itemList,
int itemCount,
int defaultItem,
boolean box,
boolean shadow);
void positionCDKItemlist (
CDKITEMLIST *itemlist);
void setCDKItemlist (
CDKITEMLIST *itemlist,
CDK_CONST char **itemList,
int itemCount,
int currentSelection,
boolean box);
void setCDKItemlistBackgroundAttrib (
CDKITEMLIST *itemlist,
chtypeattribute);
void setCDKItemlistBackgroundColor (
CDKITEMLIST *itemlist,
const char *color);
void setCDKItemlistBox (
CDKITEMLIST *itemlist,
boolean box);
void setCDKItemlistBoxAttribute (
CDKITEMLIST *itemlist,
chtype character);
void setCDKItemlistCurrentItem (
CDKITEMLIST *itemlist,
int currentItem);
void setCDKItemlistDefaultItem (
CDKITEMLIST *itemlist,
int defaultItem);
void setCDKItemlistHorizontalChar (
CDKITEMLIST *itemlist,
chtype character);
void setCDKItemlistLLChar (
CDKITEMLIST *itemlist,
chtype character);
void setCDKItemlistLRChar (
CDKITEMLIST *itemlist,
chtype character);
void setCDKItemlistPostProcess (
CDKITEMLIST *itemlist,
PROCESSFN callback,
void *data);
void setCDKItemlistPreProcess (
CDKITEMLIST *itemlist,
PROCESSFN callback,
void *data);
void setCDKItemlistULChar (
CDKITEMLIST *itemlist,
chtype character);
void setCDKItemlistURChar (
CDKITEMLIST *itemlist,
chtype character);
void setCDKItemlistValues (
CDKITEMLIST *itemlist,
CDK_CONST char **itemList,
int itemCount);
void setCDKItemlistVerticalChar (
CDKITEMLIST *itemlist,
chtype character);
DESCRIPTION
The Cdk itemlist widget creates a widget which allows a user to select from a list of preset character strings such as the days of the week or the months of the year. The following functions create or manipulate the Cdk itemlist widget.
AVAILABLE FUNCTIONS
activateCDKItemlist
activates the itemlist widget and lets the user interact with the
widget.
· The parameter itemlist 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, representing the button selected. It will also
set the widget data exitType to vNORMAL.
If the character entered into this widget was ESCAPE then the
widget will return a -1 and the widget data exitType will be
set to vESCAPE_HIT.
destroyCDKItemlist
removes the widget from the screen and frees memory the object
used.
drawCDKItemlist
draws the itemlist widget on the screen. The box option is true
if the widget is drawn with a box.
drawCDKItemlistField
draws the contents of the field.
eraseCDKItemlist
removes the widget from the screen. This does NOT destroy the
widget.
getCDKItemlistBox
returns true if the widget will be drawn with a box around it.
getCDKItemlistCurrentItem
returns the index of the currently displayed item in the widget.
getCDKItemlistDefaultItem
returns the index of the default item in the widget.
getCDKItemlistValues
returns the list of pointers to the items. The parameter size
points to a location which receives the item count.
injectCDKItemlist
injects a single character into the widget.
· The parameter itemlist is a pointer to a non-NULL itemlist
widget.
· 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 value ranging from zero to one
less than the number of buttons, representing the
button selected. The widget data exitType is set to
vNORMAL.
ESCAPE the function returns -1. The widget data exitType is
set to vESCAPE_HIT.
Otherwise
unless modified by preprocessing, postprocessing or key
bindings, the function returns -1. The widget data
exitType is set to vEARLY_EXIT.
moveCDKItemlist
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.
newCDKItemlist
creates a pointer to an itemlist widget. 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 to use as the label of the itemlist field.
itemList
is the list of the strings which will be displayed in the
widget.
itemCount
is the number of elements in the list.
defaultItem
is the index of the default item for the list.
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.
positionCDKItemlist
allows the user to move the widget around the screen via the
cursor/keypad keys. See cdk_position (3) for key bindings.
setCDKItemlist
lets the programmer modify certain elements of an existing
itemlist widget. The parameter names correspond to the same
parameter names listed in the newCDKItemlist function.
setCDKItemlistBackgroundAttrib
the background color attribute the widget. The parameter
attribute is a curses attribute, e.g., A_BOLD.
setCDKItemlistBackgroundColor
sets the background color of the widget. The parameter color is
in the format of the Cdk format strings. See cdk_display (3).
setCDKItemlistBox
sets whether the widget will be drawn with a box around it.
setCDKItemlistBoxAttribute
sets the attribute of the box.
setCDKItemlistCurrentItem
sets the currently displayed item in the widget.
setCDKItemlistDefaultItem
sets the default item in the widget.
setCDKItemlistHorizontalChar
sets the horizontal drawing character for the box to the given
character.
setCDKItemlistLLChar
sets the lower left hand corner of the widget's box to the given
character.
setCDKItemlistLRChar
sets the lower right hand corner of the widget's box to the given
character.
setCDKItemlistPostProcess
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).
setCDKItemlistPreProcess
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).
setCDKItemlistULChar
sets the upper left hand corner of the widget's box to the given
character.
setCDKItemlistURChar
sets the upper right hand corner of the widget's box to the given
character.
setCDKItemlistValues
sets the contents of the list from an array of string pointers
item whose final index is given by count. If defaultItem is in
the range 0..count, that sets the default item value for the list.
setCDKItemlistVerticalChar
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 │
│Down Arrow │
│- │
│p Shift the list one column to the left. │
├──────────────────────────────────────────────────────────┤
│Right Arrow │
│Up Arrow │
│Space │
│+ │
│n Shift the list one column to the right. │
├──────────────────────────────────────────────────────────┤
│d │
│D Display the default item. │
├──────────────────────────────────────────────────────────┤
│0 Display the first item in the list. │
│$ Display the last item in the list. │
├──────────────────────────────────────────────────────────┤
│Return Exit the widget and return an integer │
│ representing the current selection. │
│ Also set the widget data exitType to │
│ vNORMAL. │
│Tab Exit the widget and return an integer │
│ representing the current selection. │
│ Also set the widget data exitType to │
│ vNORMAL. │
│Escape Exit the widget and return -1. Also │
│ set 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_process(3), cdk_screen(3) cdk_itemlist(3)
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