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gamemenu.py
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gamemenu.py
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"""
Modulo gamemenu
Gerencia o menu principal do jogo.
"""
import pygame
from pygame.locals import *
import game, gameplay
import gfx, snd, txt
import gamecreds, gamepref
#Imagem de fundo
bg_image = None
#Imagem da seta de selecao de item do menu
select_image = None
class MenuItem:
"""
Define um item do menu principal.
"""
def __init__(self, imgname, handler):
"""
Parametros:
imgname - nome da imagem associada a este item de menu.
handler - handler do jogo associado a este item de menu.
"""
self.imgname = imgname
self.handler = handler
def init(self, pos):
"""
Inicializa um item do menu em uma dada posicao.
Parametros:
pos - posicao do menu na tela principal.
"""
self.img = gfx.load('menu_'+self.imgname+'.png')
self.rect = self.img.get_rect().move(pos)
def preGameStart(prevhandler):
"""
Funcao executa antes da inicializacao
do jogo.
"""
return gameplay.GamePlay(prevhandler)
#Definicao do menu principal
menu = [
MenuItem('play', preGameStart),
MenuItem('credits', gamecreds.GameCreds),
MenuItem('options', gamepref.GamePref),
MenuItem('quit', None),
]
def load_game_resources():
"""
Carregamento de recursos para criacao do menu.
"""
global menu, images, bg_image, select_image
images = []
pos = [330, 340]
#Seta a posicao de cada item do menu na tela
for m in menu:
m.init(pos)
pos[1] += 40
bg_image = gfx.load('1945.png')
select_image = gfx.load('select.png')
snd.preload('select_move', 'select_choose')
class GameMenu:
"""
Define o menu principal
"""
def __init__(self, prevhandler):
"""
Parametros:
prevhandler - handler previamente ativo do jogo.
"""
self.prevhandler = prevhandler
self.current = 0
self.switchhandler = None
self.logo = bg_image
self.logorect = self.logo.get_rect().move(250, 95)
self.logorectsmall = self.logorect.inflate(-2,-2)
self.select = select_image
self.last_selectrect = None
self.selectrect = select_image.get_rect().move(310, 345)
fnt = txt.Font(None, 18)
self.version = fnt.text((255, 255, 255), 'Py1945 Version ' + game.version, (10, 580), 'topleft')
def starting(self):
"""
Funcao de abertura do menu: Carrega a musica principal e
desenha o logo do jogo.
"""
snd.playmusic('aster2_sw.xm')
gfx.dirty(gfx.surface.blit(self.logo, self.logorect))
def quit(self):
"""
Funcao de saida do menu (do jogo).
"""
self.current = len(menu)-1
self.workbutton()
def workbutton(self):
"""
Clique do item do menu.
"""
button = menu[self.current]
if not button.handler:
self.switchhandler = self.prevhandler
else:
self.switchhandler = button.handler
def clearitem(self, item, dirty=0):
"""
Limpa a area de desenho do item do menu.
Parametros:
item - item do menu
dirty - se houve atualizacao grafica do item do menu (necessario para atualizar a tela)
"""
r = self.background(item.rect)
if dirty:
gfx.dirty(r)
def clearoption(self):
"""
Limpa a area de desenho da seta de selecao do menu.
"""
r = self.background(self.selectrect)
gfx.dirty(r)
def drawitem(self, item, selected):
"""
Desenha um item do menu.
Parametros:
item - item do menu a desenhar.
selected - item esta selecionado.
"""
if not selected:
gfx.surface.blit(item.img, item.rect)
gfx.dirty(item.rect)
else:
gfx.surface.blit(item.img, item.rect)
gfx.dirty(item.rect)
gfx.surface.blit(self.select, self.selectrect)
self.last_selectrect = Rect(self.selectrect)
gfx.dirty2(self.selectrect, self.last_selectrect)
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 event.key == K_ESCAPE:
snd.play('select_choose')
self.quit()
elif event.key == K_UP or event.key == K_LEFT:
#Desloca a selecao para cima
self.current = (self.current - 1)%len(menu)
self.clearoption()
self.selectrect.top = menu[self.current].rect.top + 5
snd.play('select_move')
elif event.key == K_DOWN or event.key == K_RIGHT:
#Desloca a selecao para baixo
self.current = (self.current + 1)%len(menu)
self.clearoption()
self.selectrect.top = menu[self.current].rect.top + 5
snd.play('select_move')
elif event.key == K_RETURN:
#Realiza a acao associada ao item do menu
self.workbutton()
snd.play('select_choose')
def event(self, e):
pass
def run(self):
"""
Loop sobre o menu do jogo.
"""
#Limpa todos os itens do menu
for m in menu:
self.clearitem(m)
#Limpa a selecao
self.clearoption()
gfx.dirty(gfx.surface.blit(*self.version))
select = menu[self.current]
#Desenha os itens nao selecionados.
for m in [m for m in menu if m is not select]:
self.drawitem(m, 0)
#Desenha o item selecionado.
self.drawitem(select, 1)
if self.switchhandler == self.prevhandler:
game.handler = self.prevhandler
elif self.switchhandler:
#Modificacao do handler do jogo.
game.handler = self.switchhandler(self)
self.switchhandler = None
gfx.dirty(self.background(self.version[1]))
gfx.dirty(gfx.surface.fill((0, 0, 0)))
def background(self, area):
"""
Loop de desenho do background do menu principal.
"""
fullr = gfx.surface.fill((0, 0, 0), area)
if area.colliderect(self.logorectsmall):
r = area.move(-self.logorect.left, -self.logorect.top)
return gfx.surface.blit(self.logo, area, r)
return fullr