This manual page outlines and demonstrates how they work.
The color settings are stored directly in the string. When the widget is created or activated, the string is converted to take advantage of any color commands in the string. To turn on a color pair insert </XX> into the string; where XX is a numeric value from 0 to 64. Color pair 0 is the standard default color pair for the screen. To turn off a color pair use the format command <!XX> where XX is a numeric value from 0 to 64.
The following example demonstrates the use of the color commands.
---------------------------------------- #include <cdk.h> void main() { CDKSCREEN *cdkscreen; CDKLABEL *demo; WINDOW *screen; char *mesg[4]; /* Initialize the Cdk screen. */ screen = initscr(); cdkscreen = initCDKScreen (screen); /* Start CDK Colors */ initCDKColor(); /* Set the labels up. */ mesg[0] = "</31>This line should have a yellow foreground and a blue background.<!31>"; mesg[1] = "</05>This line should have a white foreground and a blue background.<!05>"; mesg[2] = "</26>This line should have a yellow foreground and a red background.<!26>"; mesg[3] = "<C>This line should be set to whatever the screen default is."; /* Declare the labels. */ demo = newCDKLabel (cdkscreen, CENTER, CENTER, mesg, 4, TRUE, TRUE); /* Draw the label */ drawCDKLabel (demo, TRUE); waitCDKLabel (demo, ' '); /* Clean up */ destroyCDKLabel (demo); destroyCDKScreen (cdkscreen); endCDK(); exit (0); }
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The following example demonstrates the use of character display attributes.
---------------------------------------- #include <cdk.h> void main() { CDKSCREEN *cdkscreen; CDKLABEL *demo; WINDOW *screen; char *mesg[4]; /* Initialize the Cdk screen. */ screen = initscr(); cdkscreen = initCDKScreen (screen); /* Start CDK Colors */ initCDKColor(); /* Set the labels up. */ mesg[0] = "</B/31>Bold text yellow foreground / blue background.<!31>"; mesg[1] = "</U/05>Underlined text white foreground / blue background.<!05>"; mesg[2] = "</K/26>Blinking text yellow foreground / red background.<!26>"; mesg[3] = "<C>This line uses the screen default colors."; /* Declare the labels. */ demo = newCDKLabel (cdkscreen, CENTER, CENTER, mesg, 4, TRUE, TRUE); /* Draw the label */ drawCDKLabel (demo, TRUE); waitCDKLabel (demo, ' '); /* Clean up */ destroyCDKLabel (demo); destroyCDKScreen (cdkscreen); endCDK(); exit (0); }
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Note that color commands and format commands can be mixed inside the same format marker. The above example underlines the label marker, which also sets color pair number 2.
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The following example demonstrates how to use the justification commands in a Cdk widget.
#include <cdk.h>
void main()
{
CDKSCREEN *cdkscreen;
CDKLABEL *demo;
WINDOW *screen;
char *mesg[5];
/* Initialize the Cdk screen. */
screen = initscr();
cdkscreen = initCDKScreen (screen);
/* Start CDK Colors */
initCDKColor();
/* Set the labels up. */
mesg[0] = "<R></B/31>This line should have a yellow foreground and a blue background.<!31>";
mesg[1] = "</U/05>This line should have a white foreground and a blue background.<!05>";
mesg[2] = "<B=+>This is a bullet.";
mesg[3] = "<I=10>This is indented 10 characters.";
mesg[4] = "<C>This line should be set to whatever the screen default is.";
/* Declare the labels. */
demo = newCDKLabel (cdkscreen, CENTER, CENTER, mesg, 5, TRUE, TRUE);
/* Draw the label */
drawCDKLabel (demo, TRUE);
waitCDKLabel (demo, ' ');
/* Clean up */
destroyCDKLabel (demo);
destroyCDKScreen (cdkscreen);
endCDK();
exit (0);
}
The bullet format command can take either a single character or a string. The bullet in the above example would look like
A format command must be at the beginning of the string.
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The character formats can be repeated using an optional numeric repeat value. To repeat a character add the repeat count within parentheses to the end of the character format. The following example draws 10 horizontal-line characters:
<#HL(10)>
The following example draws a box within a label window:
#include <cdk.h>
void main()
{
/* Declare variables. */
CDKSCREEN *cdkscreen;
CDKLABEL *demo;
WINDOW *cursesWin;
char *mesg[4];
/* Set up CDK */
cursesWin = initscr();
cdkscreen = initCDKScreen (cursesWin);
/* Start CDK Colors */
initCDKColor();
/* Set the labels up. */
mesg[0] = "<C><#UL><#HL(26)><#UR>";
mesg[1] = "<C><#VL></R>This text should be boxed.<!R><#VL>";
mesg[2] = "<C><#LL><#HL(26)><#LR>";
mesg[3] = "<C>While this is not.";
/* Declare the labels. */
demo = newCDKLabel (cdkscreen, CENTER, CENTER, mesg, 4, TRUE, TRUE);
/* Is the label NULL??? */
if (demo == (CDKLABEL *)NULL)
{
/* Clean up the memory. */
destroyCDKScreen (cdkscreen);
/* End curses... */
endCDK();
/* Spit out a message. */
printf ("Oops. Can't seem to create the label. Is the window too small?\n");
exit (1);
}
/* Draw the CDK screen. */
refreshCDKScreen (cdkscreen);
waitCDKLabel (demo, ' ');
/* Clean up */
destroyCDKLabel (demo);
destroyCDKScreen (cdkscreen);
delwin (cursesWin);
endCDK();
exit (0);
}
Notice that drawn text can also be justified.
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