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gamepref.py
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gamepref.py
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"""
Modulo gamepref.
Gerencia o menu de preferencias do jogador.
"""
import string, math
import pygame
from pygame.locals import *
import game
import gfx, snd, txt
import gameplay
Prefs = {
"music": ("Off", "Low", "Normal"),
"volume": ("Off", "Low", "Normal"),
}
def load_prefs():
"""
Carrega as preferencias antigas do jogador
(salvas no arquivo prefs)
"""
prefs = {}
try:
filename = game.make_dataname('prefs')
for line in open(filename).readlines():
name, val = [s.strip() for s in line.split('=')]
setattr(game, name, int(val))
except (IOError, OSError, KeyError):
pass
def save_prefs():
"""
Salva as preferencias do jogador.
"""
try:
filename = game.make_dataname('prefs')
f = open(filename, 'w')
for p in Prefs.keys():
val = getattr(game, p)
f.write("%s = %d\n" % (p, int(val)))
f.close()
except (IOError, OSError), msg:
pass
images = []
namefont = None
valuefont = None
def load_game_resources():
"""
Carregamento de recursos para criacao do menu de preferencias.
"""
global images, namefont, valuefont
img = gfx.load('select.png')
images.append((img, img.get_rect()))
namefont = txt.Font('stencil', 26)
valuefont = txt.Font('stencil', 20)
snd.preload('select_choose', 'select_move', 'delete')
class GamePref:
"""
Definicao do menu de preferencias
"""
def __init__(self, prevhandler):
"""
Parametros:
prevhandler - handler previamente ativo do jogo.
"""
self.prevhandler = prevhandler
self.images = images
self.prefs = []
for n,v in Prefs.items():
self.prefs.append((n,v))
self.prefs.append(("", ("Return To Menu",)))
self.done = 0
self.aborted = 0
self.linesize = 60
self.gamelist = []
self.buildlabels()
self.buildlist()
self.current = [0, 0]
self.selectmovex = 40
self.selectmovey = 16
step = 0
self.moveto(self.gamelist[0][0][1])
def starting(self):
"""
Funcao executada quando o usuario
entra neste menu.
"""
#snd.playmusic('gamestart.wav')
pass
def moveto(self, pos):
"""
Desloca a seta de selecao para a posicao dada.
Parametros:
pos - posicao de deslocamento da seta de selecao.
"""
self.selectpos = pos[0], pos[1]
def input(self, event):
"""
Detecta os eventos associados a este menu.
Parametros:
event - Evento detectado no loop principal do jogo.
"""
if event.type == KEYUP: return
if self.done:
return
if event.key == K_ESCAPE:
self.aborted = 1
self.done = 1
self.current[0] = -1
self.clearlist()
self.moveto((2, 2))
snd.play('select_choose')
#Detecta a selecao de uma opcao do menu
if event.key == K_RETURN:
return self.pressed()
if event.key in (K_DOWN, K_UP, K_LEFT, K_RIGHT):
#Seleciona um item do menu...
if event.key == K_DOWN:
self.current[0] = (self.current[0]+1) % len(self.gamelist)
self.current[1] = min(self.current[1], len(self.gamelist[self.current[0]])-1)
elif event.key == K_UP:
self.current[0] = (self.current[0]-1) % len(self.gamelist)
self.current[1] = min(self.current[1], len(self.gamelist[self.current[0]])-1)
elif event.key == K_LEFT:
self.current[1] = (self.current[1]-1) % len(self.gamelist[self.current[0]])
else:
self.current[1] = (self.current[1]+1) % len(self.gamelist[self.current[0]])
snd.play('select_move')
x = self.gamelist[self.current[0]][self.current[1]][1].left
y = self.gamelist[self.current[0]][self.current[1]][1].top
#e desloca a seta de selecao para a posicao
#selecionada.
self.moveto((x, y))
def event(self, e):
pass
def run(self):
"""
Loop de execucao deste handler.
"""
r = self.background(self.images[0][1])
gfx.dirty(r)
self.moveselect()
#Desenha as opcoes do menu
if not self.done:
self.drawlist()
for img in self.images:
r = gfx.surface.blit(img[0], img[1])
gfx.dirty(r)
else:
#Realiza a troca de handler do jogo
game.handler = self.prevhandler
self.clearlist()
for img in self.images[1:]:
r = self.background(img[1])
gfx.dirty(r)
def background(self, area):
"""
Loop de desenho do background do menu de creditos.
"""
return gfx.surface.fill((0, 0, 0), area)
def buildlabels(self):
"""
Constroi os labels do menu de preferencias
"""
clr = 160, 200, 250
x, y = 250, 170
for pref, vals in self.prefs:
pref = pref.capitalize()
imgpos = namefont.text(clr, pref, (x,y), "midright")
images.append(imgpos)
y += self.linesize
def buildlist(self):
"""
Constroi a lista de opcoes do menu de
preferencias
"""
clr = 220, 230, 240
clr2 = 140, 150, 160
offsetx, offsety = 290, 170
self.clearlist()
self.gamelist = []
for pref, vals in self.prefs:
x = offsetx
y = offsety
if not pref:
y += 30
allvals = []
if pref:
realval = getattr(game, pref)
else:
realval = -1
i = 0
for val in vals:
if i == realval:
c = clr
else:
c = clr2
imgpos = valuefont.text(c, val, (x,y), "midleft")
allvals.append(imgpos)
x = imgpos[1].right + 60
i += 1
self.gamelist.append(allvals)
offsety += self.linesize
def clearlist(self):
"""
Apaga a lista de preferencias
(atualizacao grafica do menu)
"""
for vals in self.gamelist:
for v in vals:
gfx.dirty(self.background(v[1]))
def drawlist(self):
"""
Desenha as opcoes do menu
"""
for vals in self.gamelist:
for v in vals:
gfx.dirty(gfx.surface.blit(*v))
def moveselect(self):
"""
Move a seta de selecao para a posicao
escolhida pelo usuario
"""
pos = list(self.images[0][1].topright)
if pos[0] + self.selectmovex < self.selectpos[0]:
pos[0] += self.selectmovex
elif pos[0] < self.selectpos[0]:
pos[0] = self.selectpos[0]
if pos[0] - self.selectmovex > self.selectpos[0]:
pos[0] -= self.selectmovex
elif pos[0] > self.selectpos[0]:
pos[0] = self.selectpos[0]
if pos[1] + self.selectmovey < self.selectpos[1]:
pos[1] += self.selectmovey
elif pos[1] < self.selectpos[1]:
pos[1] = self.selectpos[1]
if pos[1] - self.selectmovey > self.selectpos[1]:
pos[1] -= self.selectmovey
elif pos[1] > self.selectpos[1]:
pos[1] = self.selectpos[1]
pos[0] -= 10
self.images[0][1].topright = pos
def pressed(self):
"""
Realiza a acao de pressionamento de
uma opcao do menu, aplicando a prefe
rencia escolhida pelo usuario
"""
pref, vals = self.prefs[self.current[0]]
if not pref:
snd.play('select_choose')
self.done = 1
else:
val = self.current[1]
oldval = getattr(game, pref)
if oldval == val:
return
setattr(game, pref, val)
self.buildlist()
if hasattr(self, "do_" + pref):
getattr(self, "do_" + pref)()
snd.play('select_choose')
def do_music(self):
"""
Callback para atualizacao
das preferencias de som
"""
snd.tweakmusicvolume()