Curses cheatsheet

curses.py

#!/usr/bin/env python
import curses

# see 2/howto/curses.html for info.
# look into curses.textpad, which turns a window into a textbox with bindings
# look into curses.ascii for easier char handing

# the curses magical setup
stdscr = curses.initscr() # setup intial window
curses.noecho() # dont echo keystrokes
curses.cbreak() # dont wait for enter, handle keys immediately
stdscr.keypad(1) # use aliases for special keys
curses.start_color()
#curses.curs_set(0) # supress the blinking cursor

# ----------------------
# useful functions
# ----------------------
# window.move(y,x)
# window.addstr(...)
# window.addch(str/int)
# window.refresh()
# getch([y,x]) - blocks for input, returns keypress as int, with cursor at (y,x)
# getstr([y,x], [n]) - get a string of len(n) if specified, with cursor at (y,x)
# nodelay(bool) - makes getch() non blocking (ch ? int(ch) : curses.ERR(int(-1)))

# notes
# ------------
# getstr() only captures ascii printable chars.
# 

# ----------------------
# example input loop
# ----------------------
# if python supported switch-case
# this would be that! but, elif chain!
#
# while True:
#     c = stdscr.getch()
#     if c == ord('p'): PrintDocument()
#     elif c == ord('q'): break  # Exit the while()
#     elif c == curses.KEY_HOME: x = y = 0
#	  elif c > 255: pass # special key. nonprintable char. handle accordingly.

# -----------------------
# the forms of addstr
# no more mvwaddch(wtf, ...)!!!
#------------------------
#addstr(str) # Display str at current location
#addstr(str, attr) # Display str at current location with attribute (attr) set
#addstr(y, x, str) # Display str at location (y,x)
#addstr(y, x, str, attr) # Display str at location (y,x) with attribute (attr) set

# -----------------------
#  color
# -----------------------
# set color pair 1 to be red text, white bg
# Note: anything currently printed with that pair will change color as well!
# curses.init_pair(1, curses.COLOR_RED, curses.COLOR_WHITE)

# print something using color pair 1
# stdscr.addstr(0,0, "RED ALERT!", curses.color_pair(1))

# ----------------------
# attributes
# ----------------------
# curses.A_BLINK
# curses.A_BOLD
# curses.A_DIM 
# curses.A_REVERSE
# curses.A_STANDOUT
# curses.A_UNDERLINE
# curses.color_pair(int)

# atrributes can be OR'd
# ------------------------
# statusbar = (curses.A_REVERSE | curses.color_pair(2))
# window.addstr("woot!", statusbar)
# window.refresh()

# undo special stuff and close curses
curses.nocbreak(); 
stdscr.keypad(0); 
curses.echo()
curses.endwin()

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