Mercurial > pyntnclick
annotate gamelib/state.py @ 336:72e4d0c5dfe9
Clean-up two old TODOs.
author | Simon Cross <hodgestar+bzr@gmail.com> |
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date | Sat, 28 Aug 2010 14:34:39 +0200 |
parents | a1ffc919d0c1 |
children | 185eca15a42a |
rev | line source |
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Start of base classes for game state.
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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_font |
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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.rect import Rect |
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7 from pygame.color import Color |
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8 |
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9 import constants |
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10 from sound import get_sound |
11 | 11 |
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12 # override the initial scene to for debugging |
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13 DEBUG_SCENE = None |
124 | 14 |
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15 # whether to show debugging rects |
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16 DEBUG_RECTS = False |
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17 |
78 | 18 class Result(object): |
19 """Result of interacting with a thing""" | |
20 | |
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21 def __init__(self, message=None, soundfile=None, detail_view=None, style=None): |
78 | 22 self.message = message |
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23 self.sound = None |
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24 if soundfile: |
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25 self.sound = get_sound(soundfile) |
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26 self.detail_view = detail_view |
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27 self.style = style |
78 | 28 |
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29 def process(self, scene_widget): |
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30 """Helper function to do the right thing with a result object""" |
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31 if self.sound: |
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32 self.sound.play() |
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33 if self.message: |
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34 scene_widget.show_message(self.message, self.style) |
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35 if self.detail_view: |
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36 scene_widget.show_detail(self.detail_view) |
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37 |
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38 |
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39 def handle_result(result, scene_widget): |
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40 """Handle dealing with result or result sequences""" |
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41 if result: |
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42 if hasattr(result, 'process'): |
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43 result.process(scene_widget) |
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44 else: |
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45 for res in result: |
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46 res.process(scene_widget) |
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47 |
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48 |
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49 def initial_state(): |
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50 """Load the initial state.""" |
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51 state = State() |
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52 state.load_scenes("cryo") |
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53 state.load_scenes("bridge") |
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54 state.load_scenes("mess") |
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55 state.load_scenes("engine") |
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56 state.load_scenes("machine") |
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57 state.load_scenes("crew_quarters") |
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58 state.load_scenes("map") |
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59 initial_scene = "cryo" if DEBUG_SCENE is None else DEBUG_SCENE |
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60 state.set_current_scene(initial_scene) |
120 | 61 state.set_do_enter_leave() |
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62 return state |
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63 |
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64 |
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65 class State(object): |
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66 """Complete game state. |
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67 |
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68 Game state consists of: |
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69 |
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70 * items |
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71 * scenes |
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72 """ |
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73 |
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74 def __init__(self): |
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75 # map of scene name -> Scene object |
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76 self.scenes = {} |
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77 # map of detail view name -> DetailView object |
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78 self.detail_views = {} |
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79 # map of item name -> Item object |
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80 self.items = {} |
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81 # list of item objects in inventory |
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82 self.inventory = [] |
73 | 83 # currently selected tool (item) |
84 self.tool = None | |
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85 # current scene |
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86 self.current_scene = None |
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87 # current detail view |
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88 self.current_detail = None |
120 | 89 # scene we came from, for enter and leave processing |
90 self.previous_scene = None | |
91 # scene transion helpers | |
92 self.do_check = None | |
93 self.old_pos = None | |
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94 # current thing |
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95 self.current_thing = None |
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96 self.highlight_override = False |
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97 |
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98 def add_scene(self, scene): |
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99 self.scenes[scene.name] = scene |
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100 |
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101 def add_detail_view(self, detail_view): |
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102 self.detail_views[detail_view.name] = detail_view |
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103 |
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104 def add_item(self, item): |
35 | 105 self.items[item.name] = item |
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106 |
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107 def load_scenes(self, modname): |
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108 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname]) |
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109 for scene_cls in mod.SCENES: |
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110 self.add_scene(scene_cls(self)) |
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111 if hasattr(mod, 'DETAIL_VIEWS'): |
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112 for scene_cls in mod.DETAIL_VIEWS: |
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113 self.add_detail_view(scene_cls(self)) |
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114 |
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115 def set_current_scene(self, name): |
120 | 116 old_scene = self.current_scene |
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117 self.current_scene = self.scenes[name] |
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118 self.current_thing = None |
120 | 119 if old_scene and old_scene != self.current_scene: |
120 self.previous_scene = old_scene | |
121 self.set_do_enter_leave() | |
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122 |
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123 def set_current_detail(self, name): |
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124 self.current_thing = None |
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125 if name is None: |
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126 self.current_detail = None |
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127 else: |
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128 self.current_detail = self.detail_views[name] |
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129 return self.current_detail.get_detail_size() |
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130 |
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131 def add_inventory_item(self, name): |
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132 self.inventory.append(self.items[name]) |
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133 |
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134 def is_in_inventory(self, name): |
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135 return self.items[name] in self.inventory |
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136 |
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137 def remove_inventory_item(self, name): |
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138 self.inventory.remove(self.items[name]) |
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139 # Unselect tool if it's removed |
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140 if self.tool == self.items[name]: |
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141 self.set_tool(None) |
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142 |
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143 def replace_inventory_item(self, old_item_name, new_item_name): |
167
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144 """Try to replace an item in the inventory with a new one""" |
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145 try: |
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146 index = self.inventory.index(self.items[old_item_name]) |
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147 self.inventory[index] = self.items[new_item_name] |
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148 if self.tool == self.items[old_item_name]: |
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149 self.set_tool(self.items[new_item_name]) |
167
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150 except ValueError: |
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151 return False |
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152 return True |
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153 |
73 | 154 def set_tool(self, item): |
155 self.tool = item | |
156 | |
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157 def draw(self, surface, screen): |
120 | 158 if self.do_check and self.previous_scene and self.do_check == constants.LEAVE: |
159 # We still need to handle leave events, so still display the scene | |
187
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160 self.previous_scene.draw(surface, screen) |
120 | 161 else: |
187
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162 self.current_scene.draw(surface, screen) |
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163 |
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164 def draw_detail(self, surface, screen): |
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165 self.current_detail.draw(surface, screen) |
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166 |
73 | 167 def interact(self, pos): |
78 | 168 return self.current_scene.interact(self.tool, pos) |
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169 |
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170 def interact_detail(self, pos): |
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171 return self.current_detail.interact(self.tool, pos) |
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172 |
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173 def do_enter_detail(self): |
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174 if self.current_detail: |
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175 self.current_detail.enter() |
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176 |
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177 def do_leave_detail(self): |
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178 if self.current_detail: |
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179 self.current_detail.leave() |
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180 |
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181 def animate(self): |
120 | 182 if not self.do_check: |
183 return self.current_scene.animate() | |
184 | |
187
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185 def check_enter_leave(self, screen): |
120 | 186 if not self.do_check: |
187 return None | |
188 if self.do_check == constants.LEAVE: | |
189 self.do_check = constants.ENTER | |
190 if self.previous_scene: | |
191 return self.previous_scene.leave() | |
192 return None | |
193 elif self.do_check == constants.ENTER: | |
194 self.do_check = None | |
195 # Fix descriptions, etc. | |
196 if self.old_pos: | |
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197 self.current_scene.update_current_thing(self.old_pos) |
120 | 198 return self.current_scene.enter() |
199 raise RuntimeError('invalid do_check value %s' % self.do_check) | |
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200 |
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201 def mouse_move(self, pos): |
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202 self.current_scene.mouse_move(pos) |
120 | 203 # So we can do sensible things on enter and leave |
204 self.old_pos = pos | |
205 | |
206 def set_do_enter_leave(self): | |
207 """Flag that we need to run the enter loop""" | |
208 self.do_check = constants.LEAVE | |
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209 |
324
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210 def mouse_move_detail(self, pos): |
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211 self.current_detail.mouse_move(pos) |
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212 |
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213 |
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214 class StatefulGizmo(object): |
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215 |
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216 # initial data (optional, defaults to none) |
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217 INITIAL_DATA = None |
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218 |
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219 def __init__(self): |
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220 self.data = {} |
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221 if self.INITIAL_DATA: |
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222 self.data.update(self.INITIAL_DATA) |
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223 |
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224 def set_data(self, key, value): |
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225 self.data[key] = value |
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226 |
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227 def get_data(self, key): |
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228 return self.data.get(key, None) |
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229 |
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230 |
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231 class Scene(StatefulGizmo): |
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232 """Base class for scenes.""" |
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233 |
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234 # sub-folder to look for resources in |
22 | 235 FOLDER = None |
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236 |
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237 # name of background image resource |
22 | 238 BACKGROUND = None |
239 | |
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240 # name of scene (optional, defaults to folder) |
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241 NAME = None |
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242 |
278 | 243 # Offset of the background image |
244 OFFSET = (0, 0) | |
245 | |
125
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246 # size (for detail views) |
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247 SIZE = constants.SCENE_SIZE |
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248 |
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249 def __init__(self, state): |
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250 StatefulGizmo.__init__(self) |
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251 # scene name |
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252 self.name = self.NAME if self.NAME is not None else self.FOLDER |
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253 # link back to state object |
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254 self.state = state |
22 | 255 # map of thing names -> Thing objects |
256 self.things = {} | |
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257 if self.BACKGROUND is not None: |
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258 self._background = get_image(self.FOLDER, self.BACKGROUND) |
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259 else: |
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260 self._background = None |
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261 |
35 | 262 def add_item(self, item): |
263 self.state.add_item(item) | |
264 | |
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265 def add_thing(self, thing): |
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266 self.things[thing.name] = thing |
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267 thing.set_scene(self) |
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268 |
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269 def remove_thing(self, thing): |
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270 del self.things[thing.name] |
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271 self.leave() |
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272 |
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273 def _get_description(self): |
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274 text = (self.state.current_thing and |
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275 self.state.current_thing.get_description()) |
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276 if text is None: |
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277 return None |
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278 label = BoomLabel(text) |
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279 font = get_font(15, 'VeraBd.ttf') |
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280 label.set_margin(5) |
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281 label.border_width = 1 |
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282 label.border_color = (0, 0, 0) |
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283 label.bg_color = Color(210, 210, 210, 255) |
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284 label.fg_color = (0, 0, 0) |
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285 return label |
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286 |
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287 def draw_description(self, surface, screen): |
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288 description = self._get_description() |
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289 if description is not None: |
326
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290 w, h = description.size |
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291 sub = screen.get_root().surface.subsurface( |
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292 Rect(400-w/2, 5, w, h)) |
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293 description.draw_all(sub) |
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294 |
22 | 295 def draw_background(self, surface): |
130
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296 if self._background is not None: |
278 | 297 surface.blit(self._background, self.OFFSET, None) |
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298 else: |
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299 surface.fill((200, 200, 200)) |
18
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300 |
23
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301 def draw_things(self, surface): |
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302 for thing in self.things.itervalues(): |
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303 thing.draw(surface) |
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304 |
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305 def draw(self, surface, screen): |
22 | 306 self.draw_background(surface) |
23
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307 self.draw_things(surface) |
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308 self.draw_description(surface, screen) |
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309 |
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310 def interact(self, item, pos): |
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311 """Interact with a particular position. |
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312 |
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313 Item may be an item in the list of items or None for the hand. |
78 | 314 |
315 Returns a Result object to provide feedback to the player. | |
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316 """ |
324
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317 if self.state.current_thing is not None: |
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318 return self.state.current_thing.interact(item) |
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319 |
105
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320 def animate(self): |
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321 """Animate all the things in the scene. |
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322 |
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323 Return true if any of them need to queue a redraw""" |
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324 result = False |
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325 for thing in self.things.itervalues(): |
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326 if thing.animate(): |
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327 result = True |
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328 return result |
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329 |
120 | 330 def enter(self): |
331 return None | |
332 | |
333 def leave(self): | |
334 return None | |
335 | |
324
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336 def update_current_thing(self, pos): |
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337 if self.state.current_thing is not None: |
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338 if not self.state.current_thing.contains(pos): |
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339 self.state.current_thing.leave() |
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340 self.state.current_thing = None |
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341 for thing in self.things.itervalues(): |
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342 if thing.contains(pos): |
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343 thing.enter(self.state.tool) |
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344 self.state.current_thing = thing |
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345 break |
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346 |
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347 def mouse_move(self, pos): |
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348 """Call to check whether the cursor has entered / exited a thing. |
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349 |
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350 Item may be an item in the list of items or None for the hand. |
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351 """ |
324
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352 self.update_current_thing(pos) |
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353 |
125
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354 def get_detail_size(self): |
127
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355 return self._background.get_size() |
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356 |
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357 |
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358 class Thing(StatefulGizmo): |
22 | 359 """Base class for things in a scene that you can interact with.""" |
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360 |
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361 # name of thing |
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362 NAME = None |
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363 |
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364 # sub-folder to look for resources in (defaults to scenes folder) |
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365 FOLDER = None |
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366 |
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367 # list of Interact objects |
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368 INTERACTS = {} |
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369 |
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370 # name first interact |
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371 INITIAL = None |
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372 |
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373 # Interact rectangle hi-light color (for debugging) |
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374 # (set to None to turn off) |
282
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375 _interact_hilight_color = Color('red') |
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376 |
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377 def __init__(self): |
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378 StatefulGizmo.__init__(self) |
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379 # name of the thing |
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380 self.name = self.NAME |
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381 # folder for resource (None is overridden by scene folder) |
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382 self.folder = self.FOLDER |
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383 # interacts |
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384 self.interacts = self.INTERACTS |
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385 # these are set by set_scene |
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386 self.scene = None |
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387 self.state = None |
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388 self.current_interact = None |
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389 self.rect = None |
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390 self.orig_rect = None |
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391 |
278 | 392 def _fix_rect(self): |
393 """Fix rects to compensate for scene offset""" | |
280
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394 # Offset logic is to always work with copies, to avoid |
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395 # flying effects from multiple calls to _fix_rect |
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396 # See footwork in draw |
278 | 397 if hasattr(self.rect, 'collidepoint'): |
280
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398 self.rect = self.rect.move(self.scene.OFFSET) |
278 | 399 else: |
280
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400 self.rect = [x.move(self.scene.OFFSET) for x in self.rect] |
278 | 401 |
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402 def set_scene(self, scene): |
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403 assert self.scene is None |
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404 self.scene = scene |
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405 if self.folder is None: |
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406 self.folder = scene.FOLDER |
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407 self.state = scene.state |
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408 for interact in self.interacts.itervalues(): |
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409 interact.set_thing(self) |
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410 self.set_interact(self.INITIAL) |
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411 |
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412 def set_interact(self, name): |
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413 self.current_interact = self.interacts[name] |
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414 self.rect = self.current_interact.interact_rect |
278 | 415 if self.scene: |
416 self._fix_rect() | |
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417 assert self.rect is not None, name |
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418 |
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419 def contains(self, pos): |
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420 if hasattr(self.rect, 'collidepoint'): |
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421 return self.rect.collidepoint(pos) |
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422 else: |
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423 # FIXME: add sanity check |
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424 for rect in list(self.rect): |
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425 if rect.collidepoint(pos): |
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426 return True |
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427 return False |
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428 |
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429 def get_description(self): |
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430 return None |
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431 |
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432 def is_interactive(self): |
266
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433 return True |
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434 |
71
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435 def enter(self, item): |
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436 """Called when the cursor enters the Thing.""" |
139
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437 pass |
71
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438 |
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439 def leave(self): |
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440 """Called when the cursr leaves the Thing.""" |
139
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441 pass |
71
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442 |
22 | 443 def interact(self, item): |
56
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444 if not self.is_interactive(): |
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445 return |
41
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446 if item is None: |
78 | 447 return self.interact_without() |
41
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448 else: |
193
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449 handler = getattr(self, 'interact_with_' + item.tool_name, None) |
41
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450 if handler is not None: |
78 | 451 return handler(item) |
41
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452 else: |
78 | 453 return self.interact_default(item) |
41
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454 |
105
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455 def animate(self): |
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456 return self.current_interact.animate() |
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457 |
41
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458 def interact_without(self): |
78 | 459 return self.interact_default(None) |
41
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460 |
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461 def interact_default(self, item): |
78 | 462 return Result("It doesn't work.") |
22 | 463 |
23
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464 def draw(self, surface): |
280
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465 old_rect = self.current_interact.rect |
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466 if old_rect: |
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467 self.current_interact.rect = old_rect.move(self.scene.OFFSET) |
86
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468 self.current_interact.draw(surface) |
280
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469 self.current_interact.rect = old_rect |
311
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470 if DEBUG_RECTS and self._interact_hilight_color: |
94
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471 if hasattr(self.rect, 'collidepoint'): |
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472 frame_rect(surface, self._interact_hilight_color, |
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473 self.rect.inflate(1, 1), 1) |
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474 else: |
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475 for rect in self.rect: |
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476 frame_rect(surface, self._interact_hilight_color, |
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477 rect.inflate(1, 1), 1) |
23
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|
478 |
22 | 479 |
480 class Item(object): | |
481 """Base class for inventory items.""" | |
482 | |
35 | 483 # image for inventory |
484 INVENTORY_IMAGE = None | |
32
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parents:
30
diff
changeset
|
485 |
336
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parents:
331
diff
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|
486 # name for interactions (i.e. def interact_with_<TOOL_NAME>) |
226 | 487 TOOL_NAME = None |
488 | |
336
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|
489 # set to instance of CursorSprite |
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diff
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|
490 CURSOR = None |
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331
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|
491 |
35 | 492 def __init__(self, name): |
493 self.name = name | |
193
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494 self.tool_name = name |
226 | 495 if self.TOOL_NAME is not None: |
496 self.tool_name = self.TOOL_NAME | |
35 | 497 self.inventory_image = get_image('items', self.INVENTORY_IMAGE) |
22 | 498 |
34
e5c043aeed65
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diff
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|
499 def get_inventory_image(self): |
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diff
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|
500 return self.inventory_image |
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Inventory and items. And stuff.
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parents:
33
diff
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|
501 |
167
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Inventory interaction can (surprisingly) affect the inventory
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166
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|
502 def interact(self, tool, state): |
166
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|
503 handler = getattr(self, 'interact_with_' + tool.name, None) |
193
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|
504 inverse_handler = getattr(tool, 'interact_with_' + self.tool_name, None) |
166
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Add inventory interactions
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|
505 if handler is not None: |
167
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Inventory interaction can (surprisingly) affect the inventory
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166
diff
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|
506 return handler(tool, state) |
166
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Add inventory interactions
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|
507 elif inverse_handler is not None: |
167
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Inventory interaction can (surprisingly) affect the inventory
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166
diff
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|
508 return inverse_handler(self, state) |
166
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Add inventory interactions
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|
509 else: |
167
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Inventory interaction can (surprisingly) affect the inventory
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parents:
166
diff
changeset
|
510 return self.interact_default(tool, state) |
166
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Add inventory interactions
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parents:
161
diff
changeset
|
511 |
167
5845a3ed4dad
Inventory interaction can (surprisingly) affect the inventory
Neil Muller <neil@dip.sun.ac.za>
parents:
166
diff
changeset
|
512 def interact_default(self, tool, state): |
166
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Add inventory interactions
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diff
changeset
|
513 return Result("That doesn't do anything useful") |
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Add inventory interactions
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161
diff
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|
514 |
191 | 515 |
516 class CloneableItem(Item): | |
517 _counter = 0 | |
518 | |
252
dfc89bc64fdb
Start of walkthrough "unit test" and associated fixes and tweaks.
Jeremy Thurgood <firxen@gmail.com>
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241
diff
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|
519 @classmethod |
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diff
changeset
|
520 def _get_new_id(cls): |
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diff
changeset
|
521 cls._counter += 1 |
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Start of walkthrough "unit test" and associated fixes and tweaks.
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diff
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|
522 return cls._counter - 1 |
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Start of walkthrough "unit test" and associated fixes and tweaks.
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241
diff
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|
523 |
191 | 524 def __init__(self, name): |
252
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diff
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|
525 my_count = self._get_new_id() |
191 | 526 super(CloneableItem, self).__init__("%s.%s" % (name, my_count)) |
193
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CloneableItem tweaks and a usable laser welder. zOMG!
Jeremy Thurgood <firxen@gmail.com>
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diff
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|
527 self.tool_name = name |
226 | 528 if self.TOOL_NAME is not None: |
529 self.tool_name = self.TOOL_NAME |