Mercurial > boomslang
annotate gamelib/state.py @ 106:da547e148532
Some (slightly) better cursor handling.
author | Jeremy Thurgood <firxen@gmail.com> |
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date | Tue, 24 Aug 2010 13:53:49 +0200 |
parents | 65976205fc2d |
children | 5213b45fcc7e |
rev | line source |
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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 albow.utils import frame_rect |
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5 from widgets import BoomLabel |
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6 from pygame.locals import BLEND_ADD |
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7 from pygame.rect import Rect |
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8 from pygame.color import Color |
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9 |
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10 import constants |
11 | 11 |
78 | 12 class Result(object): |
13 """Result of interacting with a thing""" | |
14 | |
15 def __init__(self, message=None): | |
16 self.message = message | |
17 | |
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18 |
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19 def initial_state(): |
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20 """Load the initial state.""" |
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21 state = State() |
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22 state.load_scenes("cryo") |
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23 state.load_scenes("bridge") |
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24 #state.load_scenes("mess") |
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25 #state.load_scenes("engine") |
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26 #state.load_scenes("machine") |
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27 #state.load_scenes("map") |
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28 state.set_current_scene("cryo") |
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29 return state |
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30 |
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31 |
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32 class State(object): |
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33 """Complete game state. |
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34 |
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35 Game state consists of: |
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36 |
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37 * items |
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38 * scenes |
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39 """ |
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40 |
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41 def __init__(self): |
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42 # map of scene name -> Scene object |
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43 self.scenes = {} |
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44 # map of detail view name -> DetailView object |
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45 self.detail_views = {} |
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46 # map of item name -> Item object |
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47 self.items = {} |
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48 # list of item objects in inventory |
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49 self.inventory = [] |
73 | 50 # currently selected tool (item) |
51 self.tool = None | |
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52 # current scene |
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53 self.current_scene = None |
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54 # current detail view |
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55 self.current_detail = None |
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56 |
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57 def add_scene(self, scene): |
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58 self.scenes[scene.name] = scene |
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59 |
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60 def add_detail_view(self, detail_view): |
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61 self.detail_views[detail_view.name] = detail_view |
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62 |
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63 def add_item(self, item): |
35 | 64 self.items[item.name] = item |
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65 |
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66 def load_scenes(self, modname): |
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67 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname]) |
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68 for scene_cls in mod.SCENES: |
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69 self.add_scene(scene_cls(self)) |
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70 |
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71 def set_current_scene(self, name): |
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72 self.current_scene = self.scenes[name] |
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73 |
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74 def add_inventory_item(self, name): |
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75 self.inventory.append(self.items[name]) |
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76 |
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77 def remove_inventory_item(self, name): |
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78 self.inventory.remove(self.items[name]) |
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79 |
73 | 80 def set_tool(self, item): |
81 self.tool = item | |
82 | |
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83 def draw(self, surface): |
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84 self.current_scene.draw(surface) |
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85 |
73 | 86 def interact(self, pos): |
78 | 87 return self.current_scene.interact(self.tool, pos) |
71
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88 |
105
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89 def animate(self): |
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90 return self.current_scene.animate() |
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91 |
73 | 92 def mouse_move(self, pos): |
93 self.current_scene.mouse_move(self.tool, pos) | |
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94 |
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95 |
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96 class StatefulGizmo(object): |
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97 |
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98 # initial data (optional, defaults to none) |
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99 INITIAL_DATA = None |
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100 |
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101 def __init__(self): |
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102 self.data = {} |
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103 if self.INITIAL_DATA: |
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104 self.data.update(self.INITIAL_DATA) |
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105 |
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106 def set_data(self, key, value): |
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107 self.data[key] = value |
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108 |
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109 def get_data(self, key): |
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110 return self.data.get(key, None) |
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111 |
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112 |
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113 class Scene(StatefulGizmo): |
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114 """Base class for scenes.""" |
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115 |
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116 # sub-folder to look for resources in |
22 | 117 FOLDER = None |
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118 |
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119 # name of background image resource |
22 | 120 BACKGROUND = None |
121 | |
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122 # name of scene (optional, defaults to folder) |
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123 NAME = None |
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124 |
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125 def __init__(self, state): |
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126 StatefulGizmo.__init__(self) |
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127 # scene name |
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128 self.name = self.NAME if self.NAME is not None else self.FOLDER |
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129 # link back to state object |
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130 self.state = state |
22 | 131 # map of thing names -> Thing objects |
132 self.things = {} | |
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133 self._background = get_image(self.FOLDER, self.BACKGROUND) |
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134 self._current_thing = None |
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135 self._current_description = None |
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136 |
35 | 137 def add_item(self, item): |
138 self.state.add_item(item) | |
139 | |
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140 def add_thing(self, thing): |
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141 self.things[thing.name] = thing |
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142 thing.set_scene(self) |
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143 |
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144 def remove_thing(self, thing): |
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145 del self.things[thing.name] |
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146 |
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147 def _make_description(self, text): |
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148 if text is None: |
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149 return None |
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150 label = BoomLabel(text) |
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151 label.set_margin(5) |
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152 label.border_width = 1 |
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153 label.border_color = (0, 0, 0) |
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154 label.bg_color = (127, 127, 127) |
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155 label.fg_color = (0, 0, 0) |
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156 return label |
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157 |
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158 def draw_description(self, surface): |
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159 if self._current_description is not None: |
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160 sub = surface.subsurface( |
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161 Rect(5, 5, *self._current_description.size)) |
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162 self._current_description.draw_all(sub) |
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163 |
22 | 164 def draw_background(self, surface): |
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165 surface.blit(self._background, (0, 0), None) |
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166 |
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167 def draw_things(self, surface): |
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168 for thing in self.things.itervalues(): |
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169 thing.draw(surface) |
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170 |
22 | 171 def draw(self, surface): |
172 self.draw_background(surface) | |
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173 self.draw_things(surface) |
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174 self.draw_description(surface) |
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175 |
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176 def interact(self, item, pos): |
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177 """Interact with a particular position. |
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178 |
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179 Item may be an item in the list of items or None for the hand. |
78 | 180 |
181 Returns a Result object to provide feedback to the player. | |
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182 """ |
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183 for thing in self.things.itervalues(): |
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184 if thing.contains(pos): |
78 | 185 result = thing.interact(item) |
186 if result: | |
187 if self._current_thing: | |
188 # Also update descriptions if needed | |
189 self._current_description = self._make_description( | |
190 self._current_thing.get_description()) | |
191 return result | |
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192 |
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193 def animate(self): |
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194 """Animate all the things in the scene. |
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195 |
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196 Return true if any of them need to queue a redraw""" |
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197 result = False |
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198 for thing in self.things.itervalues(): |
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199 if thing.animate(): |
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200 result = True |
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201 return result |
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202 |
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203 def mouse_move(self, item, pos): |
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204 """Call to check whether the cursor has entered / exited a thing. |
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205 |
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206 Item may be an item in the list of items or None for the hand. |
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207 """ |
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208 if self._current_thing is not None: |
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209 if self._current_thing.contains(pos): |
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210 return |
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211 else: |
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212 self._current_thing.leave() |
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213 self._current_thing = None |
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214 self._current_description = None |
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215 for thing in self.things.itervalues(): |
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216 if thing.contains(pos): |
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217 thing.enter(item) |
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218 self._current_thing = thing |
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219 self._current_description = self._make_description( |
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220 thing.get_description()) |
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221 break |
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222 |
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223 |
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224 class Interact(object): |
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225 |
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226 def __init__(self, image, rect, interact_rect): |
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227 self.image = image |
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228 self.rect = rect |
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229 self.interact_rect = interact_rect |
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230 |
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231 def set_thing(self, thing): |
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232 pass |
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233 |
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234 def draw(self, surface): |
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235 if self.image is not None: |
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236 surface.blit(self.image, self.rect, None) |
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237 |
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238 def animate(self): |
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239 return False |
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240 |
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241 |
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242 class InteractNoImage(Interact): |
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243 |
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244 def __init__(self, x, y, w, h): |
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245 super(InteractNoImage, self).__init__(None, None, Rect(x, y, w, h)) |
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246 |
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247 |
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248 class InteractRectUnion(Interact): |
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249 |
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250 def __init__(self, rect_list): |
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251 # pygame.rect.Rect.unionall should do this, but is broken |
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252 # in some pygame versions (including 1.8, it appears) |
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253 rect_list = [Rect(x) for x in rect_list] |
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254 union_rect = rect_list[0] |
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255 for rect in rect_list[1:]: |
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256 union_rect = union_rect.union(rect) |
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257 super(InteractRectUnion, self).__init__(None, None, union_rect) |
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258 self.interact_rect = rect_list |
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259 |
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260 |
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261 class InteractImage(Interact): |
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262 |
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263 def __init__(self, x, y, image_name): |
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264 super(InteractImage, self).__init__(None, None, None) |
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265 self._pos = (x, y) |
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266 self._image_name = image_name |
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267 |
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268 def set_thing(self, thing): |
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269 self.image = get_image(thing.folder, self._image_name) |
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270 self.rect = Rect(self._pos, self.image.get_size()) |
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271 self.interact_rect = self.rect |
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272 |
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273 |
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274 class InteractAnimated(Interact): |
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275 """Interactive with an animation rather than an image""" |
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276 |
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277 # FIXME: Assumes all images are the same size |
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278 # anim_seq - sequence of image names |
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279 # delay - number of frames to wait between changing images |
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280 |
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281 def __init__(self, x, y, anim_seq, delay): |
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282 self._pos = (x, y) |
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283 self._anim_pos = 0 |
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284 self._names = anim_seq |
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285 self._frame_count = 0 |
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286 self._anim_seq = None |
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287 self._delay = delay |
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288 |
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289 def set_thing(self, thing): |
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290 self._anim_seq = [get_image(thing.folder, x) for x in self._names] |
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291 self.image = self._anim_seq[0] |
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292 self.rect = Rect(self._pos, self.image.get_size()) |
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293 self.interact_rect = self.rect |
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294 |
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295 def animate(self): |
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296 if self._anim_seq: |
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297 self._frame_count += 1 |
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298 if self._frame_count > self._delay: |
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299 self._frame_count = 0 |
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300 self._anim_pos += 1 |
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301 if self._anim_pos >= len(self._anim_seq): |
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302 self._anim_pos = 0 |
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303 self.image = self._anim_seq[self._anim_pos] |
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304 # queue redraw |
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305 return True |
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306 return False |
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307 |
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308 |
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309 class Thing(StatefulGizmo): |
22 | 310 """Base class for things in a scene that you can interact with.""" |
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311 |
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312 # name of thing |
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313 NAME = None |
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314 |
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315 # sub-folder to look for resources in (defaults to scenes folder) |
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316 FOLDER = None |
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317 |
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318 # list of Interact objects |
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319 INTERACTS = {} |
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320 |
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321 # name first interact |
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322 INITIAL = None |
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323 |
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324 # Interact rectangle hi-light color (for debugging) |
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325 # (set to None to turn off) |
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326 if constants.DEBUG: |
75 | 327 _interact_hilight_color = Color('red') |
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328 else: |
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329 _interact_hilight_color = None |
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330 |
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331 def __init__(self): |
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332 StatefulGizmo.__init__(self) |
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333 # name of the thing |
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334 self.name = self.NAME |
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335 # folder for resource (None is overridden by scene folder) |
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336 self.folder = self.FOLDER |
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337 # interacts |
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338 self.interacts = self.INTERACTS |
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339 # these are set by set_scene |
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340 self.scene = None |
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341 self.state = None |
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342 self.current_interact = None |
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343 self.rect = None |
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344 # TODO: add masks |
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345 |
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346 def set_scene(self, scene): |
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347 assert self.scene is None |
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348 self.scene = scene |
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349 if self.folder is None: |
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350 self.folder = scene.FOLDER |
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351 self.state = scene.state |
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352 for interact in self.interacts.itervalues(): |
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353 interact.set_thing(self) |
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354 self.set_interact(self.INITIAL) |
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355 |
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356 def set_interact(self, name): |
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357 self.current_interact = self.interacts[name] |
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358 self.rect = self.current_interact.interact_rect |
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359 assert self.rect is not None, name |
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360 |
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361 def contains(self, pos): |
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362 if hasattr(self.rect, 'collidepoint'): |
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363 return self.rect.collidepoint(pos) |
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364 else: |
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365 # FIXME: add sanity check |
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366 for rect in list(self.rect): |
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367 if rect.collidepoint(pos): |
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368 return True |
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369 return False |
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370 |
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371 def get_description(self): |
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372 return None |
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373 |
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374 def is_interactive(self): |
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375 return True |
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376 |
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377 def enter(self, item): |
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378 """Called when the cursor enters the Thing.""" |
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379 pass |
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380 |
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381 def leave(self): |
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382 """Called when the cursr leaves the Thing.""" |
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383 pass |
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384 |
22 | 385 def interact(self, item): |
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386 if not self.is_interactive(): |
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387 return |
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388 if item is None: |
78 | 389 return self.interact_without() |
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390 else: |
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391 handler = getattr(self, 'interact_with_' + item.name, None) |
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392 if handler is not None: |
78 | 393 return handler(item) |
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394 else: |
78 | 395 return self.interact_default(item) |
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396 |
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397 def animate(self): |
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398 return self.current_interact.animate() |
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399 |
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400 def interact_without(self): |
78 | 401 return self.interact_default(None) |
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402 |
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403 def interact_default(self, item): |
78 | 404 return Result("It doesn't work.") |
22 | 405 |
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406 def draw(self, surface): |
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407 self.current_interact.draw(surface) |
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408 if self._interact_hilight_color is not None: |
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409 if hasattr(self.rect, 'collidepoint'): |
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410 frame_rect(surface, self._interact_hilight_color, |
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411 self.rect.inflate(1, 1), 1) |
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412 else: |
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More complex shaped interactables
Neil Muller <neil@dip.sun.ac.za>
parents:
93
diff
changeset
|
413 for rect in self.rect: |
ce23fad8ecb3
More complex shaped interactables
Neil Muller <neil@dip.sun.ac.za>
parents:
93
diff
changeset
|
414 frame_rect(surface, self._interact_hilight_color, |
ce23fad8ecb3
More complex shaped interactables
Neil Muller <neil@dip.sun.ac.za>
parents:
93
diff
changeset
|
415 rect.inflate(1, 1), 1) |
23
1e90a3e4618e
Add code for blitting Scene.
Simon Cross <hodgestar+bzr@gmail.com>
parents:
22
diff
changeset
|
416 |
22 | 417 |
418 class Item(object): | |
419 """Base class for inventory items.""" | |
420 | |
35 | 421 # image for inventory |
422 INVENTORY_IMAGE = None | |
32
18cb1af411ef
Add helper for adding items. Give items names. Make things take a rectangle.
Simon Cross <hodgestar+bzr@gmail.com>
parents:
30
diff
changeset
|
423 |
35 | 424 def __init__(self, name): |
425 self.name = name | |
426 self.inventory_image = get_image('items', self.INVENTORY_IMAGE) | |
32
18cb1af411ef
Add helper for adding items. Give items names. Make things take a rectangle.
Simon Cross <hodgestar+bzr@gmail.com>
parents:
30
diff
changeset
|
427 # TODO: needs cursor |
22 | 428 |
34
e5c043aeed65
Inventory and items. And stuff.
Jeremy Thurgood <firxen@gmail.com>
parents:
33
diff
changeset
|
429 def get_inventory_image(self): |
e5c043aeed65
Inventory and items. And stuff.
Jeremy Thurgood <firxen@gmail.com>
parents:
33
diff
changeset
|
430 return self.inventory_image |
e5c043aeed65
Inventory and items. And stuff.
Jeremy Thurgood <firxen@gmail.com>
parents:
33
diff
changeset
|
431 |