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        self.events = pg.event.get()
 48
 49        for event in self.events:
 50            if event.type == pg.QUIT:
 51                self.done = True
 52            elif event.type == pg.KEYDOWN:
 53                self.keys = pg.key.get_pressed()
 54                self.toggle_show_fps(event.key)
 55            elif event.type == pg.KEYUP:
 56                self.keys = pg.key.get_pressed()
 57            self.state.get_event(event)
 58
 59    def toggle_show_fps(self, key):
 60        if key == pg.K_F5:
 61            self.show_fps = not self.show_fps
 62            if not self.show_fps:
 63                pg.display.set_caption(self.caption)
 64
 65    def main(self):
 66        """Main loop for entire program"""
 67        while not self.done:
 68            self.event_loop()
 69            self.update()
 70            pg.display.update()
 71            self.clock.tick(self.fps)
 72            if self.show_fps:
 73                fps = self.clock.get_fps()
 74                with_fps = "{} - {:.2f} FPS".format(self.caption, fps)
 75                pg.display.set_caption(with_fps)
 76
 77
 78class _State(object):
 79    """Base class for all game states"""
 80    def __init__(self, name):
 81        self.start_time = 0.0
 82        self.current_time = 0.0
 83        self.done = False
 84        self.quit = False
 85        self.next = None
 86        self.previous = None
 87        self.persist = {}
 88        self.name = name
 89
 90    def get_event(self, event):
 91        pass
 92
 93    def startup(self, current_time, persistant):
 94        self.persist = persistant
 95        self.start_time = current_time
 96
 97    def cleanup(self):
 98        self.done = False
 99        return self.persist
100
101    def update(self, surface, keys, current_time):
102        pass
103
104
105def load_all_gfx(directory, colorkey=(255,0,255), accept=('.png', 'jpg', 'bmp')):
106    graphics = {}
107    for pic in os.listdir(directory):
108        name, ext = os.path.splitext(pic)
109        if ext.lower() in accept:
110            img = pg.image.load(os.path.join(directory, pic))
111            if img.get_alpha():
112                img = img.convert_alpha()
113            else:
114                img = img.convert()
115                img.set_colorkey(colorkey)
116            graphics[name] = img
117    return graphics
118
119
120def load_all_music(directory, accept=('.wav', '.mp3', '.ogg', '.mdi')):
121    songs = {}
122    for song in os.listdir(directory):
123        name, ext = os.path.splitext(song)
124        if ext.lower() in accept:
125            songs[name] = os.path.join(directory, song)
126    return songs
127
128
129def load_all_fonts(directory, accept=('.ttf')):
130    return load_all_music(directory, accept)
131
132
133def load_all_sfx(directory, accept=('.wav','.mp3','.ogg','.mdi')):
134    effects = {}
135    for fx in os.listdir(directory):
136        name, ext = os.path.splitext(fx)
137        if ext.lower() in accept:
138            effects[name] = pg.mixer.Sound(os.path.join(directory, fx))
139    return effects
140
141
142def get_image(x, y, width, height, sprite_sheet):
143    """Extracts image from sprite sheet"""
144    image = pg.Surface([width, height])
145    rect = image.get_rect()
146
147    image.blit(sprite_sheet, (0, 0), (x, y, width, height))
148    image.set_colorkey(c.BLACK)
149
150    return image
151
152
153def create_game_data_dict():
154    """Create a dictionary of persistant values the player
155    carries between states"""
156    data_dict = {'last location': None,
157                 'last state': None,
158                 'last direction': 'up',
159                 'town start pos': [12, 49],
160                 'castle start pos': [12, 26],
161                 'king item': ['500 gold']}
162
163    return data_dict
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