diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Demo/curses/life.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/curses/life.py Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,216 @@ +#!/usr/bin/env python +# life.py -- A curses-based version of Conway's Game of Life. +# Contributed by AMK +# +# An empty board will be displayed, and the following commands are available: +# E : Erase the board +# R : Fill the board randomly +# S : Step for a single generation +# C : Update continuously until a key is struck +# Q : Quit +# Cursor keys : Move the cursor around the board +# Space or Enter : Toggle the contents of the cursor's position +# +# TODO : +# Support the mouse +# Use colour if available +# Make board updates faster +# + +import random, string, traceback +import curses + +class LifeBoard: + """Encapsulates a Life board + + Attributes: + X,Y : horizontal and vertical size of the board + state : dictionary mapping (x,y) to 0 or 1 + + Methods: + display(update_board) -- If update_board is true, compute the + next generation. Then display the state + of the board and refresh the screen. + erase() -- clear the entire board + makeRandom() -- fill the board randomly + set(y,x) -- set the given cell to Live; doesn't refresh the screen + toggle(y,x) -- change the given cell from live to dead, or vice + versa, and refresh the screen display + + """ + def __init__(self, scr, char=ord('*')): + """Create a new LifeBoard instance. + + scr -- curses screen object to use for display + char -- character used to render live cells (default: '*') + """ + self.state = {} + self.scr = scr + Y, X = self.scr.getmaxyx() + self.X, self.Y = X-2, Y-2-1 + self.char = char + self.scr.clear() + + # Draw a border around the board + border_line = '+'+(self.X*'-')+'+' + self.scr.addstr(0, 0, border_line) + self.scr.addstr(self.Y+1,0, border_line) + for y in range(0, self.Y): + self.scr.addstr(1+y, 0, '|') + self.scr.addstr(1+y, self.X+1, '|') + self.scr.refresh() + + def set(self, y, x): + """Set a cell to the live state""" + if x<0 or self.X<=x or y<0 or self.Y<=y: + raise ValueError, "Coordinates out of range %i,%i"% (y,x) + self.state[x,y] = 1 + + def toggle(self, y, x): + """Toggle a cell's state between live and dead""" + if x<0 or self.X<=x or y<0 or self.Y<=y: + raise ValueError, "Coordinates out of range %i,%i"% (y,x) + if self.state.has_key( (x,y) ): + del self.state[x,y] + self.scr.addch(y+1, x+1, ' ') + else: + self.state[x,y] = 1 + self.scr.addch(y+1, x+1, self.char) + self.scr.refresh() + + def erase(self): + """Clear the entire board and update the board display""" + self.state = {} + self.display(update_board=False) + + def display(self, update_board=True): + """Display the whole board, optionally computing one generation""" + M,N = self.X, self.Y + if not update_board: + for i in range(0, M): + for j in range(0, N): + if self.state.has_key( (i,j) ): + self.scr.addch(j+1, i+1, self.char) + else: + self.scr.addch(j+1, i+1, ' ') + self.scr.refresh() + return + + d = {} + self.boring = 1 + for i in range(0, M): + L = range( max(0, i-1), min(M, i+2) ) + for j in range(0, N): + s = 0 + live = self.state.has_key( (i,j) ) + for k in range( max(0, j-1), min(N, j+2) ): + for l in L: + if self.state.has_key( (l,k) ): + s += 1 + s -= live + if s == 3: + # Birth + d[i,j] = 1 + self.scr.addch(j+1, i+1, self.char) + if not live: self.boring = 0 + elif s == 2 and live: d[i,j] = 1 # Survival + elif live: + # Death + self.scr.addch(j+1, i+1, ' ') + self.boring = 0 + self.state = d + self.scr.refresh() + + def makeRandom(self): + "Fill the board with a random pattern" + self.state = {} + for i in range(0, self.X): + for j in range(0, self.Y): + if random.random() > 0.5: + self.set(j,i) + + +def erase_menu(stdscr, menu_y): + "Clear the space where the menu resides" + stdscr.move(menu_y, 0) + stdscr.clrtoeol() + stdscr.move(menu_y+1, 0) + stdscr.clrtoeol() + +def display_menu(stdscr, menu_y): + "Display the menu of possible keystroke commands" + erase_menu(stdscr, menu_y) + stdscr.addstr(menu_y, 4, + 'Use the cursor keys to move, and space or Enter to toggle a cell.') + stdscr.addstr(menu_y+1, 4, + 'E)rase the board, R)andom fill, S)tep once or C)ontinuously, Q)uit') + +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 00: ypos -= 1 + elif c == curses.KEY_DOWN and ypos0: xpos -= 1 + elif c == curses.KEY_RIGHT and xpos