life.py 文件源码

def keyloop(stdscr):
    # Clear the screen and display the menu of keys
    stdscr.clear()
    stdscr_y, stdscr_x = stdscr.getmaxyx()
    menu_y = (stdscr_y-3)-1
    display_menu(stdscr, menu_y)

    # Allocate a subwindow for the Life board and create the board object
    subwin = stdscr.subwin(stdscr_y-3, stdscr_x, 0, 0)
    board = LifeBoard(subwin, char=ord('*'))
    board.display(update_board=False)

    # xpos, ypos are the cursor's position
    xpos, ypos = board.X//2, board.Y//2

    # Main loop:
    while (1):
        stdscr.move(1+ypos, 1+xpos)     # Move the cursor
        c = stdscr.getch()                # Get a keystroke
        if 0<c<256:
            c = chr(c)
            if c in ' \n':
                board.toggle(ypos, xpos)
            elif c in 'Cc':
                erase_menu(stdscr, menu_y)
                stdscr.addstr(menu_y, 6, ' Hit any key to stop continuously '
                              'updating the screen.')
                stdscr.refresh()
                # Activate nodelay mode; getch() will return -1
                # if no keystroke is available, instead of waiting.
                stdscr.nodelay(1)
                while (1):
                    c = stdscr.getch()
                    if c != -1:
                        break
                    stdscr.addstr(0,0, '/')
                    stdscr.refresh()
                    board.display()
                    stdscr.addstr(0,0, '+')
                    stdscr.refresh()

                stdscr.nodelay(0)       # Disable nodelay mode
                display_menu(stdscr, menu_y)

            elif c in 'Ee':
                board.erase()
            elif c in 'Qq':
                break
            elif c in 'Rr':
                board.makeRandom()
                board.display(update_board=False)
            elif c in 'Ss':
                board.display()
            else: pass                  # Ignore incorrect keys
        elif c == curses.KEY_UP and ypos>0:            ypos -= 1
        elif c == curses.KEY_DOWN and ypos<board.Y-1:  ypos += 1
        elif c == curses.KEY_LEFT and xpos>0:          xpos -= 1
        elif c == curses.KEY_RIGHT and xpos<board.X-1: xpos += 1
        else:
            # Ignore incorrect keys
            pass