1__author__ = 'justinarmstrong'
  2
  3import os
  4import pygame as pg
  5import constants as c
  6
  7class Control(object):
  8    """
  9    Control class for entire project.  Contains the game loop, and contains
 10    the event_loop which passes events to States as needed.  Logic for flipping
 11    states is also found here.
 12    """
 13    def __init__(self, caption):
 14        self.screen = pg.display.get_surface()
 15        self.done = False
 16        self.clock = pg.time.Clock()
 17        self.caption = caption
 18        self.fps = 60
 19        self.show_fps = False
 20        self.current_time = 0.0
 21        self.keys = pg.key.get_pressed()
 22        self.state_dict = {}
 23        self.state_name = None
 24        self.state = None
 25
 26    def setup_states(self, state_dict, start_state):
 27        self.state_dict = state_dict
 28        self.state_name = start_state
 29        self.state = self.state_dict[self.state_name]
 30
 31    def update(self):
 32        self.current_time = pg.time.get_ticks()
 33        if self.state.quit:
 34            self.done = True
 35        elif self.state.done:
 36            self.flip_state()
 37        self.state.update(self.screen, self.keys, self.current_time)
 38
 39    def flip_state(self):
 40        previous, self.state_name = self.state_name, self.state.next
 41        persist = self.state.cleanup()
 42        self.state = self.state_dict[self.state_name]
 43        self.state.startup(self.current_time, persist)
 44        self.state.previous = previous
 45
 46    def event_loop(self):
 47        for event in pg.event.get():
 48            if event.type == pg.QUIT:
 49                self.done = True
 50            elif event.type == pg.KEYDOWN:
 51                self.keys = pg.key.get_pressed()
 52                self.toggle_show_fps(event.key)
 53            elif event.type == pg.KEYUP:
 54                self.keys = pg.key.get_pressed()
 55            self.state.get_event(event)
 56
 57    def toggle_show_fps(self, key):
 58        if key == pg.K_F5:
 59            self.show_fps = not self.show_fps
 60            if not self.show_fps:
 61                pg.display.set_caption(self.caption)
 62
 63    def main(self):
 64        """Main loop for entire program"""
 65        while not self.done:
 66            self.event_loop()
 67            self.update()
 68            pg.display.update()
 69            self.clock.tick(self.fps)
 70            if self.show_fps:
 71                fps = self.clock.get_fps()
 72                with_fps = "{} - {:.2f} FPS".format(self.caption, fps)
 73                pg.display.set_caption(with_fps)
 74
 75
 76class _State(object):
 77    """Base class for all game states"""
 78    def __init__(self):
 79        self.start_time = 0.0
 80        self.current_time = 0.0
 81        self.done = False
 82        self.quit = False
 83        self.next = None
 84        self.previous = None
 85        self.persist = {}
 86
 87    def get_event(self, event):
 88        pass
 89
 90    def startup(self, current_time, persistant):
 91        self.persist = persistant
 92        self.start_time = current_time
 93
 94    def cleanup(self):
 95        self.done = False
 96        return self.persist
 97
 98    def update(self, surface, keys, current_time):
 99        pass
100
101
102def load_all_gfx(directory, colorkey=(255,0,255), accept=('.png', 'jpg', 'bmp')):
103    graphics = {}
104    for pic in os.listdir(directory):
105        name, ext = os.path.splitext(pic)
106        if ext.lower() in accept:
107            img = pg.image.load(os.path.join(directory, pic))
108            if img.get_alpha():
109                img = img.convert_alpha()
110            else:
111                img = img.convert()
112                img.set_colorkey(colorkey)
113            graphics[name] = img
114    return graphics
115
116
117def load_all_music(directory, accept=('.wav', '.mp3', '.ogg', '.mdi')):
118    songs = {}
119    for song in os.listdir(directory):
120        name, ext = os.path.splitext(song)
121        if ext.lower() in accept:
122            songs[name] = os.path.join(directory, song)
123    return songs
124
125
126def load_all_fonts(directory, accept=('.ttf')):
127    return load_all_music(directory, accept)
128
129
130def load_all_sfx(directory, accept=('.wav','.mp3','.ogg','.mdi')):
131    effects = {}
132    for fx in os.listdir(directory):
133        name, ext = os.path.splitext(fx)
134        if ext.lower() in accept:
135            effects[name] = pg.mixer.Sound(os.path.join(directory, fx))
136    return effects
137
138
139def get_image(x, y, width, height, sprite_sheet):
140    """Extracts image from sprite sheet"""
141    image = pg.Surface([width, height])
142    rect = image.get_rect()
143
144    image.blit(sprite_sheet, (0, 0), (x, y, width, height))
145    image.set_colorkey(c.BLACK)
146
147    return image
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