curs_addch - Linux
Overview
curs_addch()
is a Linux command that adds a character to the cursor’s current position in the virtual screen buffer. It is designed for use with curses, a library for terminal control in text-based user interfaces (TUIs).
Syntax
int curs_addch(const chtype ch);
Options/Flags
- ch: The character to be added. This can be a single character, a control character, or a multi-byte character.
Examples
Simple example
#include <stdlib.h>
#include <curses.h>
int main() {
initscr();
curs_addch('A');
refresh();
getch();
endwin();
return 0;
}
Complex example
#include <stdlib.h>
#include <curses.h>
int main() {
initscr();
curs_addch('\033'); // Control-C
curs_addch('['); // Open bracket
curs_addch('2'); // Move cursor down two lines
curs_addch('J'); // Clear screen from cursor down
refresh();
getch();
endwin();
return 0;
}
Common Issues
One common issue is that curs_addch()
will move the cursor forward by one position, even if the character is a multi-byte character. To avoid this, use wadd_wch()
instead.
Integration
curs_addch()
can be integrated with other curses functions to create complex and visually appealing TUIs. For example, it can be used with move()
to move the cursor to a specific position, and with attrset()
to change the appearance of the character being added.
Related Commands
move
: Moves the cursor to a specific position.addch
: Adds a character to the current cursor position in the standard output buffer.waddch
: Adds a character to the current cursor position in a specified window.