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,
char * title,
char * label,
char ** list,
int listSize,
chtype fillerCharacter,
chtype highlight,
boolean box,
boolean shadow);
- void positionCDKAlphalist (
-
CDKALPHALIST *alphalist);
- void setCDKAlphalist (
-
CDKALPHALIST *alphalist,
char ** list,
int listSize,
chtype fillerCharacter,
chtype highlight,
boolean box);
- void setCDKAlphalistBackgroundAttrib (
-
CDKALPHALIST *alphalist,
chtype attribute);
- void setCDKAlphalistBackgroundColor (
-
CDKALPHALIST *alphalist,
char * color);
- void setCDKAlphalistBox (
-
CDKALPHALIST *alphalist,
boolean box);
- void setCDKAlphalistBoxAttribute (
-
CDKALPHALIST *alphalist,
chtype character);
- void setCDKAlphalistContents (
-
CDKALPHALIST *alphalist,
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.