NAME¶
cdk_swindow - a curses scrolling window widget.
SYNOPSIS¶
cc [
flag ... ]
file ...
-lcdk [
library ...
]
#include <cdk.h>
- void activateCDKSwindow (
-
CDKSWINDOW *swindow,
chtype * actions);
- void addCDKSwindow (
-
CDKSWINDOW *swindow,
char *info,
int insertPosition);
- void cleanCDKSwindow (
-
CDKSWINDOW *swindow);
- int execCDKSwindow (
-
CDKSWINDOW *swindow,
char * command,
int insertPosition);
- void destroyCDKSwindow (
-
CDKSWINDOW *swindow);
- void drawCDKSwindow (
-
CDKSWINDOW *swindow,
boolean box);
- void dumpCDKSwindow (
-
CDKSWINDOW *swindow,
char *filename);
- void eraseCDKSwindow (
-
CDKSWINDOW *swindow);
void execCDKSwindow (
CDKSWINDOW *swindow,
char *command,
int insertPosition);
boolean getCDKSwindowBox (
CDKSWINDOW *swindow);
- chtype **getCDKSwindowContents (
-
CDKSWINDOW *swindow);
- int injectCDKSwindow (
-
CDKSWINDOW *swindow,
chtype input);
- void jumpToLineCDKSwindow (
-
CDKSWINDOW *swindow,
int line);
- void loadCDKSwindowInformation (
-
CDKSWINDOW *swindow);
- void moveCDKSwindow (
-
CDKSWINDOW *swindow,
int xpos,
int ypos,
boolean relative,
boolean refresh);
- CDKSWINDOW *newCDKSwindow (
-
CDKSCREEN *cdkscreen,
int xpos,
int ypos,
int height,
int width,
char *title,
int saveLines,
boolean box,
boolean shadow);
- void positionCDKSwindow (
-
CDKSWINDOW *swindow);
- void saveCDKSwindowInformation (
-
CDKSWINDOW *swindow);
- void setCDKSwindow (
-
CDKSWINDOW *swindow,
char **info,
int lines,
boolean box);
- void setCDKSwindowBackgroundAttrib (
-
CDKSWINDOW *swindow,
chtype attribute);
- void setCDKSwindowBackgroundColor (
-
CDKSWINDOW *swindow,
char * color);
void setCDKSwindowBox (
CDKSWINDOW *swindow,
boolean boxWidget);
- void setCDKSwindowBoxAttribute (
-
CDKSWINDOW *swindow,
chtype character);
- void setCDKSwindowContents (
-
CDKSWINDOW *swindow,
char **info,
int lines);
- void setCDKSwindowHorizontalChar (
-
CDKSWINDOW *swindow,
chtype character);
- void setCDKSwindowLLChar (
-
CDKSWINDOW *swindow,
chtype character);
- void setCDKSwindowLRChar (
-
CDKSWINDOW *swindow,
chtype character);
- void setCDKSwindowPostProcess (
-
CDKSWINDOW *swindow,
PROCESSFN callback,
void * data);
- void setCDKSwindowPreProcess (
-
CDKSWINDOW *swindow,
PROCESSFN callback,
void * data);
- void setCDKSwindowULChar (
-
CDKSWINDOW *swindow,
chtype character);
- void setCDKSwindowURChar (
-
CDKSWINDOW *swindow,
chtype character);
- void setCDKSwindowVerticalChar (
-
CDKSWINDOW *swindow,
chtype character);
- void trimCDKSwindow (
-
CDKSWINDOW *swindow,
int start,
int finish);
DESCRIPTION¶
The Cdk scrolling window (swindow) widget can be used to display messages. The
following functions create or manipulate the Cdk swindow box widget.
AVAILABLE FUNCTIONS¶
- activateCDKSwindow
- function activates the swindow widget and lets the user
interact with the widget. The parameter swindow is a pointer to a
non-NULL swindow 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. 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
value of -1 and the widget data exitType will be set to
vESCAPE_HIT.
- addCDKSwindow
- adds information to a scrolling window. The information is
supplied by the info parameter. The information is immediately
added to the scrolling window. The position of the new information is
governed by the value of the parameter insertPosition. This
parameter may be two values: TOP or BOTTOM.
- cleanCDKSwindow
- clears the information from the window.
- destroyCDKSwindow
- removes the widget from the screen and frees memory the
object used.
- drawCDKSwindow
- draws the swindow widget on the screen. If the box
parameter is true, the widget is drawn with a box.
- dumpCDKSwindow
- saves the contents of the scrolling window into the file
specified by the filename parameter. It returns -1 on failure, and
the number of lines saved if the dump was successful.
- eraseCDKSwindow
- removes the widget from the screen. This does NOT
destroy the widget.
- execCDKSwindow
- allows the user to execute a shell command and have the
output of the shell command direct itself to the scrolling window. The
command parameter is the command to execute. The
insertPosition parameter tells where the output will be inserted
within the scrolling window.
- getCDKSwindowBox
- returns true if the widget will be drawn with a box around
it.
- getCDKSwindowContents
- returns the contents of the scrolling window. The parameter
lines will be set to the number of lines returned.
- injectCDKSwindow
- injects a single character into the widget. The parameter
swindow is a pointer to a non-NULL swindow 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. 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.
- jumpToLineCDKSwindow
- moves the scrolling window to the given line. The parameter
line may be an integer or one of the two predefined values
TOP and BOTTOM.
- loadCDKSwindowInformation
- allows the user to load the contents of a file into the
scrolling window. This function is interactive, and will ask for a
filename.
- moveCDKSwindow
- 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.
- newCDKSwindow
- creates a swindow 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.
- 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 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.
- saveLines
- is the number of lines to save before throwing information
away.
- box
- is true if the widget should be drawn with a box around
it.
- The shadow
- turns the shadow on or off around this widget.
- If the widget could not be created then a NULL
pointer is returned.
- positionCDKSwindow
- allows the user to move the widget around the screen via
the cursor/keypad keys. See cdk_position (3) for key bindings.
- saveCDKSwindowInformation
- allows the user to save the contents of the scrolling
window into a file. This function is interactive, and will ask for a
filename.
- setCDKSwindow
- lets the programmer modify certain elements of an existing
swindow widget. The parameter info is a char ** of the
information to set in the scrolling window; lines is the number of
lines being added. The other parameter names correspond to the same
parameter names listed in the newCDKSwindow function.
- setCDKSwindowBackgroundAttrib
- sets the background attribute of the widget. The parameter
attribute is a curses attribute, e.g., A_BOLD.
- setCDKSwindowBackgroundColor
- sets the background color of the widget. The parameter
color is in the format of the Cdk format strings. See
cdk_display (3).
- setCDKSwindowBox
- sets whether the widget will be drawn with a box around
it.
- setCDKSwindowBoxAttribute
- sets the attribute of the box.
- setCDKSwindowContents
- lets the programmer modify certain elements of an existing
swindow widget. The parameter info is a char ** of the
information to set in the scrolling window; lines is the number of
lines being added.
- setCDKSwindowHorizontalChar
- sets the horizontal drawing character for the box to the
given character.
- setCDKSwindowLLChar
- sets the lower left hand corner of the widget's box to the
given character.
- setCDKSwindowLRChar
- sets the lower right hand corner of the widget's box to the
given character.
- setCDKSwindowPostProcess
- 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).
- setCDKSwindowPreProcess
- 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).
- setCDKSwindowULChar
- sets the upper left hand corner of the widget's box to the
given character.
- setCDKSwindowURChar
- sets the upper right hand corner of the widget's box to the
given character.
- setCDKSwindowVerticalChar
- sets the vertical drawing character for the box to the
given character.
- trimCDKSwindow
- removes information from a scrolling window. The parameters
start and end state where to start cutting from and where to
stop. The first element in the scrolling window starts at index 0.
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 |
Scrolls the window left one column. |
Right Arrow |
Scrolls the window right one column. |
Up Arrow |
Scrolls the window up one row. |
Down Arrow |
Scrolls the window down one row. |
|
Prev Page |
|
Ctrl-B |
|
b |
|
B |
Scroll the window backward one page. |
|
Next Page |
|
Ctrl-F |
|
Space |
|
f |
|
F |
Scroll the window forward one page. |
|
Home |
|
| |
Scroll the list to the left margin. |
|
End |
|
$ |
Scroll the list to the right margin. |
|
1 |
|
< |
|
g |
Move to the top of the scrolling window. |
> |
|
G |
Move to the bottom of the scrolling window. |
|
l |
|
L |
Load a file into the scrolling window. |
|
s |
|
S |
Save the contents of the scrolling window into a file. |
|
Return |
Set the widget's exitType to vNORMAL, exit the widget and
return 1. |
Tab |
Set the widget's exitType to vNORMAL, exit the widget and
return 1. |
Escape |
Set the widget's exitType to vESCAPE_HIT, exit the widget
and return -1. |
Ctrl-L |
Refreshes the screen. |
|
SEE ALSO¶
cdk(3),
cdk_binding(3),
cdk_display(3),
cdk_position(3),
cdk_screen(3)