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)