Mercurial > pyntnclick

annotate gamelib/state.py @ 41:ad6f56bfa8b7

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Cryo door, titanium leg and some interaction prototypes.
author Jeremy Thurgood <firxen@gmail.com>
date Mon, 23 Aug 2010 00:49:22 +0200
parents 088a101f5b94
children 8f1fccb8cadf
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1 """Utilities and base classes for dealing with scenes."""
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2
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3 from albow.resource import get_image, get_sound
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4 from pygame.locals import BLEND_ADD
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5
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7 def initial_state():
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8 """Load the initial state."""
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9 state = State()
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10 state.load_scenes("cryo")
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11 state.set_current_scene("cryo")
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12 return state
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13
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15 class State(object):
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16 """Complete game state.
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17
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18 Game state consists of:
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19
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20 * items
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21 * scenes
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22 """
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23
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24 def __init__(self):
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25 # map of scene name -> Scene object
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26 self.scenes = {}
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27 # map of item name -> Item object
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28 self.items = {}
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29 # list of item objects in inventory
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30 self.inventory = []
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31 # current scene
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32 self.current_scene = None
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33
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34 def add_scene(self, scene):
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35 self.scenes[scene.name] = scene
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36
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37 def add_item(self, item):
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38 self.items[item.name] = item
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39
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40 def load_scenes(self, modname):
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41 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname])
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42 for scene_cls in mod.SCENES:
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43 self.add_scene(scene_cls(self))
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44
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45 def set_current_scene(self, name):
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46 self.current_scene = self.scenes[name]
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47
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48 def add_inventory_item(self, name):
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49 self.inventory.append(self.items[name])
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50
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51 def remove_inventory_item(self, name):
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52 self.inventory.remove(self.items[name])
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53
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54 def draw(self, surface):
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55 self.current_scene.draw(surface)
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57 def message(self, msg):
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58 print msg
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61 class Scene(object):
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62 """Base class for scenes."""
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63
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64 # sub-folder to look for resources in
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65 FOLDER = None
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66
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67 # name of background image resource
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68 BACKGROUND = None
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69
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70 # name of scene (optional, defaults to folder)
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71 NAME = None
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72
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73 # initial scene data (optional, defaults to none)
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74 INITIAL_DATA = None
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75
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76 def __init__(self, state):
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77 # scene name
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78 self.name = self.NAME if self.NAME is not None else self.FOLDER
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79 # link back to state object
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80 self.state = state
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81 # map of thing names -> Thing objects
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82 self.things = {}
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83 self._background = get_image(self.FOLDER, self.BACKGROUND)
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84 self.data = {}
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85 if self.INITIAL_DATA:
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86 self.data.update(self.INITIAL_DATA)
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87
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88 def add_item(self, item):
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89 self.state.add_item(item)
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90
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91 def add_thing(self, thing):
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92 self.things[thing.name] = thing
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93 thing.set_scene(self)
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94
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95 def remove_thing(self, thing):
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96 del self.things[thing.name]
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97
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98 def draw_background(self, surface):
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99 surface.blit(self._background, (0, 0), None, BLEND_ADD)
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100
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101 def draw_things(self, surface):
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102 for thing in self.things.itervalues():
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103 thing.draw(surface)
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104
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105 def draw(self, surface):
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106 self.draw_background(surface)
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107 self.draw_things(surface)
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108
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109
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110 class Thing(object):
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111 """Base class for things in a scene that you can interact with."""
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112
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113 # sub-folder to look for resources in
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114 FOLDER = None
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115
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116 # name of image resource
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117 IMAGE = None
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118
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119 def __init__(self, name, rect):
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120 self.name = name
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121 # area within scene that triggers calls to interact
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122 self.rect = rect
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123 # these are set by set_scene
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124 self.scene = None
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125 self.state = None
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126 # TODO: add masks
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127 # TODO: add images
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128
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129 def set_scene(self, scene):
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130 assert self.scene is None
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131 self.scene = scene
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132 self.state = scene.state
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133
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134 def message(self, msg):
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135 self.state.message(msg)
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136
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137 def interact(self, item):
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138 if item is None:
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139 self.interact_without()
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140 else:
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141 handler = getattr(self, 'interact_with_' + item.name, None)
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142 if handler is not None:
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143 handler(item)
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144 else:
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145 self.interact_default(item)
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146
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147 def interact_without(self):
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148 self.interact_default(None)
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149
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150 def interact_default(self, item):
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151 self.message("It doesn't work.")
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152
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153 def draw(self, surface):
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154 pass
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155
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156
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157 class Item(object):
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158 """Base class for inventory items."""
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159
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160 # image for inventory
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161 INVENTORY_IMAGE = None
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162
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163 def __init__(self, name):
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164 self.name = name
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165 self.inventory_image = get_image('items', self.INVENTORY_IMAGE)
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166 # TODO: needs cursor
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167
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168 def get_inventory_image(self):
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169 return self.inventory_image
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170