Categories: Python | Code Examples | S60 | How To

This page was last modified 09:18, 5 April 2008.

From Forum Nokia Wiki

This is an example of a basic game of Tic-Tac-Toe in PyS60.

Code

import appuifw, e32, random
from graphics import *
from key_codes import *
 
app_lock=e32.Ao_lock()
def quit():
	global running
	running=0
	app_lock.signal()
appuifw.app.exit_key_handler=quit
 
def newgame():
	global running, bg, xcoord, ycoord, gridmatrix, dotx, doty
	
	#The application takes up the entire screen
	appuifw.app.screen="full"
 
	class Keyboard(object):
		def __init__(self,onevent=lambda:None):
			self._keyboard_state={}
			self._downs={}
			self._onevent=onevent
		def handle_event(self,event):
       			if event['type']==appuifw.EEventKeyDown:
       				code=event['scancode']
       				if not self.is_down(code):
        				self._downs[code]=self._downs.get(code,0)+1
       				self._keyboard_state[code]=1
       			elif event['type']==appuifw.EEventKeyUp:
       				self._keyboard_state[event['scancode']]=0
       			self._onevent()
		def is_down(self,scancode):
       			return self._keyboard_state.get(scancode,0)
		def pressed(self,scancode):
       			if self._downs.get(scancode,0):
       				self._downs[scancode]-=1
       				return True
			return False
	keyboard=Keyboard()
 
	bg=Image.new((240,320))
	def handle_redraw(rect):canvas.blit(bg)
	canvas=appuifw.Canvas(event_callback=keyboard.handle_event, redraw_callback=handle_redraw)
	appuifw.app.body=canvas
 
	#In order to keep track of the state of the game, we use a matrix filled with:
	#0 if the square is empty, 1 if the square is occupied by the phone and 2 if the square is occupied by the player
	gridmatrix=[[0,0,0],[0,0,0],[0,0,0]]
 
	#Writing X or O requires appropriate coordinates
	xcoord=[32,112,192]
	ycoord=[65,172,279]
 
	#To show the player where the cursor is, we display a red dot (by default in the middle of the grid)
	dotx=doty=1
 
	#To keep track of whose turn it is, we use the variable turn (1 for phone, 2 for player)
	#The player starts the game
	turn=2
 
	gameover=False
 
	#We draw the grid
	def drawgrid():
		global xcoord, ycoord, gridmatrix, bg, dotx, doty
		bg.clear()
		bg.line((80,20,80,300), 0)
		bg.line((160,20,160,300), 0)
		bg.line((20,107,220,107), 0)
		bg.line((20,214,220,214), 0)
		for i in range(3):
			for j in range(3):
				if(gridmatrix[i-1][j-1]==1):bg.text((xcoord[i-1],ycoord[j-1]), u"O", font="title")
				elif(gridmatrix[i-1][j-1]==2):bg.text((xcoord[i-1],ycoord[j-1]), u"X", font="title")
		bg.point((xcoord[dotx]+7,ycoord[doty]-10), 0xff0000, width=15)
	drawgrid()
 
	#Now we handle the keypress events by moving the dot accordingly
	running=1
	while(running==1):
		#Set the menu
		appuifw.app.menu=[(u"New game", newgame), (u"Exit", quit)]
 
		if(keyboard.pressed(EScancodeRightSoftkey)):quit()
	
		#When it's the player's turn...
		if(turn==2):
			if(keyboard.pressed(EScancodeSelect)):  #If the "select" key is pressed
				if(gridmatrix[dotx][doty]==0):  #If the square is available
					bg.text((xcoord[dotx],ycoord[doty]), u"X", font="title")
					gridmatrix[dotx][doty]=2
					handle_redraw(())
					drawgrid()
					turn=1
			if((keyboard.pressed(EScancodeLeftArrow)) and (dotx>0)):
				dotx-=1
				handle_redraw(())
				drawgrid()
			if((keyboard.pressed(EScancodeRightArrow)) and (dotx<2)):
				dotx+=1
				handle_redraw(())
				drawgrid()
			if((keyboard.pressed(EScancodeUpArrow)) and (doty>0)):
				doty-=1
				handle_redraw(())
				drawgrid()
			if((keyboard.pressed(EScancodeDownArrow)) and (doty<2)):
				doty+=1
				handle_redraw(())
				drawgrid()
	
		#We now check if the game is over. This can happen if one of the two has a sequence of 3 symbols, or if the grid is full
		gameover=True
		for i in range(3):
			for j in range(3):
				if(gridmatrix[i-1][j-1]==0):gameover=False
		
		#To show the player the winning row, we strike it through with a green line
		if(gridmatrix[0][0]==gridmatrix[0][1]==gridmatrix[0][2]<>0):
			bg.line(((40,20),(40,300)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
		if(gridmatrix[1][0]==gridmatrix[1][1]==gridmatrix[1][2]<>0):
			bg.line(((120,20),(120,300)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
		if(gridmatrix[2][0]==gridmatrix[2][1]==gridmatrix[2][2]<>0):
			bg.line(((200,20),(200,300)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
		if(gridmatrix[0][0]==gridmatrix[1][0]==gridmatrix[2][0]<>0):
			bg.line(((20,53),(220,53)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
		if(gridmatrix[0][1]==gridmatrix[1][1]==gridmatrix[2][1]<>0):
			bg.line(((20,160),(220,160)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
		if(gridmatrix[0][2]==gridmatrix[1][2]==gridmatrix[2][2]<>0):
			bg.line(((20,267),(220,267)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
		if(gridmatrix[0][0]==gridmatrix[1][1]==gridmatrix[2][2]<>0):
			bg.line(((20,20),(220,300)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
		if(gridmatrix[2][0]==gridmatrix[1][1]==gridmatrix[0][2]<>0):
			bg.line(((20,300),(220,20)), 0x33CC00)
			gameover=True
			e32.ao_sleep(1)
 
		if(gameover==True):
			if(appuifw.query(u"Game over. Play again?", "query")):newgame()
			else:quit()
 
		#When it's the phone's turn and the game is not over yet...
		while((turn==1) and (gameover==False)):
			px=random.choice([0,1,2])
			py=random.choice([0,1,2])
			if(gridmatrix[px][py]==0):
				bg.text((xcoord[px],ycoord[py]), u"O", font="title")
				gridmatrix[px][py]=1
				handle_redraw(())
				drawgrid()
				turn=2
 
		e32.ao_yield()
 
#Tell the application to start a new game immediately after launch
newgame()

Screenshots

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