NAME¶
cdk_selection - curses selection list widget.
SYNOPSIS¶
cc [
flag ... ]
file ...
-lcdk [
library ...
]
#include <cdk.h>
- int activateCDKSelection (
-
CDKSELECTION *selection,
chtype * actions);
- void destroyCDKSelection (
-
CDKSELECTION *selection);
- void drawCDKSelection (
-
CDKSELECTION *selection,
boolean box);
- void eraseCDKSelection (
-
CDKSELECTION *selection);
- boolean getCDKSelectionBox (
-
CDKSELECTION *selection);
- int getCDKSelectionChoice (
-
CDKSELECTION *selection,
int index);
- int *getCDKSelectionChoices (
-
CDKSELECTION *selection);
- int getCDKSelectionCurrent (
-
CDKSELECTION *selection);
- chtype getCDKSelectionHighlight (
-
CDKSELECTION *selection);
- int getCDKSelectionItems (
-
CDKSELECTION *selection,
char **list);
- int getCDKSelectionMode (
-
CDKSELECTION *selection,
int index);
- int *getCDKSelectionModes (
-
CDKSELECTION *selection);
- char *getCDKSelectionTitle (
-
CDKSELECTION *selection);
- int injectCDKSelection (
-
CDKSELECTION *selection,
chtype input);
- void moveCDKSelection (
-
CDKSELECTION *selection,
int xpos,
int ypos,
boolean relative,
boolean refresh);
- CDKSELECTION *newCDKSelection (
-
CDKSCREEN *cdkscreen,
int xpos,
int ypos,
int spos,
int height,
int width,
char *title,
char **selectionList,
int selectionListLength,
char **choiceList,
int choiceListLength,
chtype highlight,
boolean box,
boolean shadow);
- void positionCDKSelection (
-
CDKSELECTION *selection);
- void setCDKSelection (
-
CDKSELECTION *selection,
chtype highlight,
int *defChoices,
boolean box);
- void setCDKSelectionBackgroundAttrib (
-
CDKSELECTION *selection,
chtype attribute);
- void setCDKSelectionBackgroundColor (
-
CDKSELECTION *selection,
char * color);
- void setCDKSelectionBox (
-
CDKSELECTION *selection,
boolean boxWidget);
- void setCDKSelectionBoxAttribute (
-
CDKSELECTION *selection,
chtype character);
- void setCDKSelectionChoice (
-
CDKSELECTION *selection,
int index,
int choice);
- void setCDKSelectionChoices (
-
CDKSELECTION *selection,
int *choices);
- void setCDKSelectionCurrent (
-
CDKSELECTION *selection,
intindex);
- void setCDKSelectionHighlight (
-
CDKSELECTION *selection,
chtype highlight);
- void setCDKSelectionHorizontalChar (
-
CDKSELECTION *selection,
chtype character);
- void setCDKSelectionItems (
-
CDKSELECTION *selection,
char **list,
int listSize);
- void setCDKSelectionLLChar (
-
CDKSELECTION *selection,
chtype character);
- void setCDKSelectionLRChar (
-
CDKSELECTION *selection,
chtype character);
- void setCDKSelectionMode (
-
CDKSELECTION *selection,
int index,
int mode);
- void setCDKSelectionModes (
-
CDKSELECTION *selection,
int *modes);
- void setCDKSelectionPostProcess (
-
CDKSELECTION *selection,
PROCESSFN callback,
void * data);
- void setCDKSelectionPreProcess (
-
CDKSELECTION *selection,
PROCESSFN callback,
void * data);
- void setCDKSelectionTitle (
-
CDKSELECTION *selection,
char *title);
- void setCDKSelectionULChar (
-
CDKSELECTION *selection,
chtype character);
- void setCDKSelectionURChar (
-
CDKSELECTION *selection,
chtype character);
- void setCDKSelectionVerticalChar (
-
CDKSELECTION *selection,
chtype character);
DESCRIPTION¶
The Cdk selection widget creates a selection list. The following functions
create or manipulate the Cdk selection list widget.
AVAILABLE FUNCTIONS¶
- activateCDKSelection
- activates the selection widget and lets the user interact
with the widget. The parameter selection is a pointer to a non-NULL
selection 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 1. Itm will
also set the widget data exitType to vNORMAL. If the
character entered into this widget was ESCAPE then the widget will
return a value of -1 and the widget data exitType will be set to
vESCAPE_HIT.
- destroyCDKSelection
- removes the widget from the screen and frees memory the
object used.
- drawCDKSelection
- draws the selection widget on the screen. If the box
parameter is true, the widget is drawn with a box.
- eraseCDKSelection
- removes the widget from the screen. This does NOT
destroy the widget.
- getCDKSelectionBox
- returns true if the widget will be drawn with a box around
it.
- getCDKSelectionChoice
- returns the selection choice at the given index.
- getCDKSelectionChoices
- returns an array of the current selection choices for the
widget.
- getCDKSelectionCurrent
- returns the current selection index.
- getCDKSelectionHighlight
- returns the attribute of the highlight bar.
- getCDKSelectionItems
- copies the selection-list items into the caller's array and
returns the number of items in the list.
- getCDKSelectionMode
- returns the selection mode at the given index.
- getCDKSelectionModes
- returns an array of the current modes for the widget.
- getCDKSelectionTitle
- returns the first line of the title of the selection
widget. The caller must free the returned value.
- injectCDKSelection
- injects a single character into the widget. The parameter
selection is a pointer to a non-NULL selection 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 1. The widget data exitType is
set to vNORMAL.
- ESCAPE
- the function returns -1. vESCAPE_HIT. 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.
- moveCDKSelection
- 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.
- newCDKSelection
- creates a selection widget and returns a pointer to it.
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.
- spos
- is where the scroll bar is to be placed. It may be one of
three values:
- LEFT
- puts the scroll bar on the left of the scrolling list.
RIGHT puts the scroll bar on the right side of the list, and
- NONE
- does not add a scroll bar.
- 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 to display at the top of the widget.
The title can be more than one line; just provide a carriage return
character at the line break.
- selectionList
- is the list of items to display in the selection list
- selectionListLength
- is the number of elements in the given list.
- choiceList
- is the list of choices that will be selected when the user
presses the space bar.
- choiceListLength
- is the length of this list.
- highlight
- specifies the display attribute of the currently selected
item.
- box
- is true if the 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.
- positionCDKSelection
- allows the user to move the widget around the screen via
the cursor/keypad keys. See cdk_position (3) for key bindings.
- setCDKSelection
- lets the programmer modify certain elements of an existing
selection widget. The parameter names correspond to the same parameter
names listed in the newCDKSelection function.
- setCDKSelectionBackgroundAttrib
- sets the background attribute of the widget. The parameter
attribute is a curses attribute, e.g., A_BOLD.
- setCDKSelectionBackgroundColor
- sets the background color of the widget. The parameter
color is in the format of the Cdk format strings. See
cdk_display (3).
- setCDKSelectionBox
- sets whether the widget will be drawn with a box around
it.
- setCDKSelectionBoxAttribute
- sets the attribute of the box.
- setCDKSelectionChoice
- sets the selection choice value at the given index.
- setCDKSelectionChoices
- sets the selection choice values of the widget.
- setCDKSelectionCurrent
- sets the current selection index.
- setCDKSelectionHighlight
- sets the attribute of the highlight bar.
- setCDKSelectionHorizontalChar
- sets the horizontal drawing character for the box to the
given character.
- setCDKSelectionItems
- sets the selection list items.
- setCDKSelectionLLChar
- sets the lower left hand corner of the widget's box to the
given character.
- setCDKSelectionLRChar
- sets the lower right hand corner of the widget's box to the
given character.
- setCDKSelectionMode
- sets the selection mode at the given index.
- setCDKSelectionModes
- sets the selection mode of the elements of the widget.
There are two acceptable values for the modes: 0 which allows the user to
change the selection value at the given index; and 1 which sets the
element to a read-only state.
- setCDKSelectionPostProcess
- 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).
- setCDKSelectionPreProcess
- 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 is a
pointer to void. To learn more about pre-processing see
cdk_process (3).
- setCDKSelectionTitle
- set the selection list's title.
- setCDKSelectionULChar
- sets the upper left hand corner of the widget's box to the
given character.
- setCDKSelectionURChar
- sets the upper right hand corner of the widget's box to the
given character.
- setCDKSelectionVerticalChar
- 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 help
the user enter or manipulate the information quickly:
Key |
Action |
|
Left Arrow |
Shift the whole list left one column. |
Right Arrow |
Shift the whole list right one column. |
Up Arrow |
Select the previous item in the list. |
Down Arrow |
Select the next item in the list. |
|
Prev Page |
|
Ctrl-B |
Scroll one page backward. |
|
Next Page |
|
Ctrl-F |
Scroll one page forward. |
|
1 |
|
< |
|
g |
|
Home |
Move to the first element in the list. |
|
> |
|
G |
|
End |
Move to the last element in the list. |
|
$ |
Shift the whole list to the far right. |
| |
Shift the whole list to the far left. |
|
Space |
Cycles to the next choice on the current item. |
Return |
Exit the widget and return 1. Also set the widget data exitType
to vNORMAL. |
Tab |
Exit the widget and return 1. 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_screen(3)