Mercurial > pyntnclick

annotate gamelib/state.py @ 49:8771d545a493

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Remove debugging print
author Neil Muller <neil@dip.sun.ac.za>
date Mon, 23 Aug 2010 11:59:41 +0200
parents 8f1fccb8cadf
children 2e2f6ff54780
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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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6
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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.load_scenes("bridge")
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12 #state.load_scenes("mess")
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13 #state.load_scenes("engine")
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14 #state.load_scenes("machine")
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15 #state.load_scenes("map")
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16 state.set_current_scene("cryo")
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17 return state
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18
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19
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20 class State(object):
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21 """Complete game state.
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22
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23 Game state consists of:
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24
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25 * items
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26 * scenes
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27 """
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29 def __init__(self):
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30 # map of scene name -> Scene object
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31 self.scenes = {}
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32 # map of item name -> Item object
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33 self.items = {}
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34 # list of item objects in inventory
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35 self.inventory = []
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36 # current scene
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37 self.current_scene = None
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38
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39 def add_scene(self, scene):
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40 self.scenes[scene.name] = scene
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41
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42 def add_item(self, item):
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43 self.items[item.name] = item
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44
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45 def load_scenes(self, modname):
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46 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname])
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47 for scene_cls in mod.SCENES:
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48 self.add_scene(scene_cls(self))
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49
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50 def set_current_scene(self, name):
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51 self.current_scene = self.scenes[name]
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52
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53 def add_inventory_item(self, name):
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54 self.inventory.append(self.items[name])
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55
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56 def remove_inventory_item(self, name):
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57 self.inventory.remove(self.items[name])
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58
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59 def draw(self, surface):
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60 self.current_scene.draw(surface)
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61
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62 def message(self, msg):
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63 print msg
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64
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65
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66 class Scene(object):
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67 """Base class for scenes."""
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68
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69 # sub-folder to look for resources in
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70 FOLDER = None
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71
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72 # name of background image resource
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73 BACKGROUND = None
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74
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75 # name of scene (optional, defaults to folder)
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76 NAME = None
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77
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78 # initial scene data (optional, defaults to none)
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79 INITIAL_DATA = None
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80
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81 def __init__(self, state):
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82 # scene name
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83 self.name = self.NAME if self.NAME is not None else self.FOLDER
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84 # link back to state object
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85 self.state = state
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86 # map of thing names -> Thing objects
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87 self.things = {}
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88 self._background = get_image(self.FOLDER, self.BACKGROUND)
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89 self.data = {}
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90 if self.INITIAL_DATA:
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91 self.data.update(self.INITIAL_DATA)
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92
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93 def add_item(self, item):
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94 self.state.add_item(item)
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95
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96 def add_thing(self, thing):
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97 self.things[thing.name] = thing
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98 thing.set_scene(self)
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99
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100 def remove_thing(self, thing):
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101 del self.things[thing.name]
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102
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103 def draw_background(self, surface):
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104 surface.blit(self._background, (0, 0), None, BLEND_ADD)
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105
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106 def draw_things(self, surface):
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107 for thing in self.things.itervalues():
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108 thing.draw(surface)
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109
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110 def draw(self, surface):
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111 self.draw_background(surface)
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112 self.draw_things(surface)
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113
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114
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115 class Thing(object):
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116 """Base class for things in a scene that you can interact with."""
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117
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118 # sub-folder to look for resources in
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119 FOLDER = None
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120
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121 # name of image resource
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122 IMAGE = None
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123
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124 def __init__(self, name, rect):
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125 self.name = name
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126 # area within scene that triggers calls to interact
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127 self.rect = rect
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128 # these are set by set_scene
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129 self.scene = None
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130 self.state = None
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131 # TODO: add masks
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132 # TODO: add images
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133
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134 def set_scene(self, scene):
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135 assert self.scene is None
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136 self.scene = scene
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137 self.state = scene.state
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138
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139 def message(self, msg):
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140 self.state.message(msg)
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141
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142 def interact(self, item):
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143 if item is None:
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144 self.interact_without()
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145 else:
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146 handler = getattr(self, 'interact_with_' + item.name, None)
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147 if handler is not None:
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148 handler(item)
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149 else:
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150 self.interact_default(item)
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151
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152 def interact_without(self):
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153 self.interact_default(None)
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154
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155 def interact_default(self, item):
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156 self.message("It doesn't work.")
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157
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158 def draw(self, surface):
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159 pass
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160
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161
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162 class Item(object):
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163 """Base class for inventory items."""
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164
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165 # image for inventory
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166 INVENTORY_IMAGE = None
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167
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168 def __init__(self, name):
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169 self.name = name
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170 self.inventory_image = get_image('items', self.INVENTORY_IMAGE)
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171 # TODO: needs cursor
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172
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173 def get_inventory_image(self):
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174 return self.inventory_image
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175