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cdk_alphalist(3) DragonFly Library Functions Manual cdk_alphalist(3)
NAME
cdk_alphalist - curses sorted list widget.
SYNOPSIS
cc [ flag ... ] file ... -lcdk [ library ... ]
#include <cdk.h>
char *activateCDKAlphalist (
CDKALPHALIST *alphalist,
chtype *actions);
void destroyCDKAlphalist (
CDKALPHALIST *alphalist);
void drawCDKAlphalist (
CDKALPHALIST *alphalist,
boolean box);
void eraseCDKAlphalist (
CDKALPHALIST *alphalist);
boolean getCDKAlphalistBox (
CDKALPHALIST *alphalist);
char **getCDKAlphalistContents (
CDKALPHALIST *alphalist,
int *size);
int getCDKAlphalistCurrentItem (
CDKALPHALIST *widget);
chtype getCDKAlphalistFillerChar (
CDKALPHALIST *alphalist);
chtype getCDKAlphalistHighlight (
CDKALPHALIST *alphalist);
char *injectCDKAlphalist (
CDKALPHALIST *alphalist,
chtype input);
void moveCDKAlphalist (
CDKALPHALIST *alphalist,
int xpos,
int ypos,
boolean relative,
boolean refresh);
CDKALPHALIST *newCDKAlphalist (
CDKSCREEN *cdkscreen,
int xpos,
int ypos,
int height,
int width,
const char * title,
const char * label,
CDK_CONST char ** list,
int listSize,
chtype fillerCharacter,
chtype highlight,
boolean box,
boolean shadow);
void positionCDKAlphalist (
CDKALPHALIST *alphalist);
void setCDKAlphalist (
CDKALPHALIST *alphalist,
CDK_CONST char ** list,
int listSize,
chtype fillerCharacter,
chtype highlight,
boolean box);
void setCDKAlphalistBackgroundAttrib (
CDKALPHALIST *alphalist,
chtype attribute);
void setCDKAlphalistBackgroundColor (
CDKALPHALIST *alphalist,
const char * color);
void setCDKAlphalistBox (
CDKALPHALIST *alphalist,
boolean box);
void setCDKAlphalistBoxAttribute (
CDKALPHALIST *alphalist,
chtype character);
void setCDKAlphalistContents (
CDKALPHALIST *alphalist,
CDK_CONST char ** list,
int listSize);
void setCDKAlphalistCurrentItem (
CDKALPHALIST *widget,
int item);
void setCDKAlphalistFillerChar (
CDKALPHALIST *alphalist,
chtype fillerCharacter);
void setCDKAlphalistHighlight (
CDKALPHALIST *alphalist,
chtype highlight);
void setCDKAlphalistHorizontalChar (
CDKALPHALIST *alphalist,
chtype character);
void setCDKAlphalistLLChar (
CDKALPHALIST *alphalist,
chtype character);
void setCDKAlphalistLRChar (
CDKALPHALIST *alphalist,
chtype character);
void setCDKAlphalistPostProcess (
CDKALPHALIST *alphalist,
PROCESSFN callback,
void * data);
void setCDKAlphalistPreProcess (
CDKALPHALIST *alphalist,
PROCESSFN callback,
void * data);
void setCDKAlphalistULChar (
CDKALPHALIST *alphalist,
chtype character);
void setCDKAlphalistURChar (
CDKALPHALIST *alphalist,
chtype character);
void setCDKAlphalistVerticalChar (
CDKALPHALIST *alphalist,
chtype character);
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
both the entry field widget and the scrolling list widget.
AVAILABLE FUNCTIONS
activateCDKAlphalist
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 widget will try to complete the word in the entry field. If
the widget is exited with the RETURN character then the widget
data exitType will be set to vNORMAL. If the widget was exited
with the ESCAPE key then the widget data exitType will be set to
vESCAPE_HIT and the widget returns NULL.
destroyCDKAlphalist
removes the widget from the screen and frees memory the object
used.
drawCDKAlphalist
draws the alphalist widget on the screen. If the box parameter is
true, the widget is drawn with a box.
eraseCDKAlphalist
removes the widget from the screen. This does NOT destroy the
widget.
getCDKAlphalistBox
returns true if the widget will be drawn with a box around it.
getCDKAlphalistContents
returns the contents of the alphalist.
getCDKAlphalistCurrentItem
returns the current position in the scroll-widget.
getCDKAlphalistFillerChar
returns the character being used as the filler character in the
entry field portion of the widget.
getCDKAlphalistHighlight
returns the attribute of the highlight bar of the scrolling list
portion of the widget.
injectCDKAlphalist
injects a single character into the widget (actually the entry
widget). The parameter alphalist is a pointer to a non-NULL
alphalist 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 the information in the entry field.
The widget data exitType is set to vNORMAL.
ESCAPE the function returns a NULL pointer. The widget data
exitType is set to vESCAPE_HIT.
Otherwise
unless modified by preprocessing, postprocessing or key
bindings, the function returns a NULL pointer. The widget
data exitType is set to vEARLY_EXIT.
moveCDKAlphalist
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.
newCDKAlphalist
creates a pointer to an alphalist 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. This parameter can take an integer or one of the pre-
defined values LEFT, RIGHT, and CENTER.
ypos controls the placement of the object along the vertical axis.
This parameter may be an integer value or one of the pre-
defined values TOP, BOTTOM, and CENTER.
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
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.
title
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 carriage return character at the line break.
label
is the string which will be displayed in the label of the
entry field.
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 (note that it modifies the
caller's copy of the list to do this).
listSize
tells the widget how large the word list is.
fillerCharacter
is the character which is to be displayed in an empty space
in the entry field.
highlight
is the attribute of the highlight bar in the scrolling list.
box is true if the widget should be drawn with a box around it.
shadow
is true to turn the shadow on around this widget.
If the widget could not be created then a NULL pointer is
returned.
positionCDKAlphalist
allows the user to move the widget around the screen via the
cursor/keypad keys. See cdk_position (3) for key bindings.
setCDKAlphalist
lets the programmer modify certain elements of an existing
alphalist widget. The parameter names correspond to the same
parameter names listed in the newCDKAlphalist function.
setCDKAlphalistBackgroundAttrib
sets the background attribute of the widget. The parameter
attribute is a curses attribute, e.g., A_BOLD.
setCDKAlphalistBackgroundColor
sets the background color of the widget. The parameter color is
in the format of the Cdk format strings. See cdk_display (3).
setCDKAlphalistBox
sets whether the widget will be drawn with a box around it.
setCDKAlphalistBoxAttribute
sets the attribute of the box.
setCDKAlphalistContents
sets the contents of the alphalist widget (note that it sorts the
caller's copy of the list).
setCDKAlphalistCurrentItem
set the current position in the scroll-widget.
setCDKAlphalistFillerChar
sets the character to use when drawing the entry field portion of
the widget.
setCDKAlphalistHighlight
sets the attribute of the highlight bar of the scrolling list
portion of the widget.
setCDKAlphalistHorizontalChar
sets the horizontal drawing character for the box to the given
character.
setCDKAlphalistLLChar
sets the lower left hand corner of the widget's box to the given
character.
setCDKAlphalistLRChar
sets the lower right hand corner of the widget's box to the given
character.
setCDKAlphalistPostProcess
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).
setCDKAlphalistPreProcess
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).
setCDKAlphalistULChar
sets the upper left hand corner of the widget's box to the given
character.
setCDKAlphalistURChar
sets the upper right hand corner of the widget's box to the given
character.
setCDKAlphalistVerticalChar
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.
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 | 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 widget data |
| | exitType to vNORMAL. |
+----------------+-------------------------------------+
|Escape | Exits the widget and returns a NULL |
| | pointer. It also sets the widget |
| | data exitType to vESCAPE_HIT. |
+----------------+-------------------------------------+
SEE ALSO
cdk(3), cdk_binding(3), cdk_display(3), cdk_position(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.
cdk_alphalist(3)