Mercurial > boomslang
annotate gamelib/state.py @ 176:c6ea3b11514c
Add --scene for selecting initial scene during debugging.
author | Simon Cross <simon@simonx> |
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date | Wed, 25 Aug 2010 13:56:38 +0200 |
parents | 5845a3ed4dad |
children | fbfd8e748ac0 |
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 |
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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.surface import Surface |
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9 from pygame.color import Color |
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10 |
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11 import constants |
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12 from sound import get_sound |
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13 from cursor import HAND |
11 | 14 |
176
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15 # override the initial scene to for debugging |
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16 DEBUG_SCENE = None |
124 | 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): |
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 |
78 | 27 |
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28 def process(self, scene_widget): |
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29 """Helper function to do the right thing with a result object""" |
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30 if self.sound: |
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31 self.sound.play() |
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32 if self.message: |
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33 scene_widget.show_message(self.message) |
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34 if self.detail_view: |
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35 scene_widget.show_detail(self.detail_view) |
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36 |
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37 def initial_state(screen): |
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38 """Load the initial state.""" |
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39 state = State(screen) |
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40 state.load_scenes("cryo") |
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41 state.load_scenes("bridge") |
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42 state.load_scenes("mess") |
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43 state.load_scenes("engine") |
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44 state.load_scenes("machine") |
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45 state.load_scenes("map") |
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46 initial_scene = "cryo" if DEBUG_SCENE is None else DEBUG_SCENE |
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47 state.set_current_scene(initial_scene) |
120 | 48 state.set_do_enter_leave() |
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49 return state |
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50 |
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51 |
7
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52 class State(object): |
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53 """Complete game state. |
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54 |
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55 Game state consists of: |
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56 |
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57 * items |
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58 * scenes |
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59 """ |
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60 |
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61 def __init__(self, screen): |
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62 # map of scene name -> Scene object |
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63 self.scenes = {} |
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64 # map of detail view name -> DetailView object |
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65 self.detail_views = {} |
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66 # map of item name -> Item object |
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67 self.items = {} |
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68 # list of item objects in inventory |
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69 self.inventory = [] |
73 | 70 # currently selected tool (item) |
71 self.tool = None | |
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72 # current scene |
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73 self.current_scene = None |
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74 # current detail view |
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75 self.current_detail = None |
120 | 76 # scene we came from, for enter and leave processing |
77 self.previous_scene = None | |
78 # scene transion helpers | |
79 self.do_check = None | |
80 self.old_pos = None | |
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81 |
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82 self.screen = screen |
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83 |
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84 def add_scene(self, scene): |
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85 self.scenes[scene.name] = scene |
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86 |
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87 def add_detail_view(self, detail_view): |
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88 self.detail_views[detail_view.name] = detail_view |
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89 |
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90 def add_item(self, item): |
35 | 91 self.items[item.name] = item |
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92 |
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93 def load_scenes(self, modname): |
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94 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname]) |
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95 for scene_cls in mod.SCENES: |
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96 self.add_scene(scene_cls(self)) |
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97 if hasattr(mod, 'DETAIL_VIEWS'): |
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98 for scene_cls in mod.DETAIL_VIEWS: |
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99 self.add_detail_view(scene_cls(self)) |
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100 |
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101 def set_current_scene(self, name): |
120 | 102 old_scene = self.current_scene |
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103 self.current_scene = self.scenes[name] |
120 | 104 if old_scene and old_scene != self.current_scene: |
105 self.previous_scene = old_scene | |
106 self.set_do_enter_leave() | |
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107 |
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108 def set_current_detail(self, name): |
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109 if name is None: |
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110 self.current_detail = None |
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111 else: |
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112 self.current_detail = self.detail_views[name] |
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113 self.current_scene._current_description = None |
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114 self.current_scene._current_thing = None |
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115 return self.current_detail.get_detail_size() |
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116 |
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117 def add_inventory_item(self, name): |
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118 self.inventory.append(self.items[name]) |
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119 |
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120 def remove_inventory_item(self, name): |
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121 self.inventory.remove(self.items[name]) |
117
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122 # Unselect tool if it's removed |
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123 if self.tool == self.items[name]: |
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124 self.set_tool(None) |
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125 |
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126 def replace_inventory_item(self, old_item, new_item): |
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127 """Try to replace an item in the inventory with a new one""" |
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128 try: |
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129 index = self.inventory.index(old_item) |
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130 self.inventory[index] = new_item |
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131 if self.tool == old_item: |
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132 self.set_tool(new_item) |
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133 except ValueError: |
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134 return False |
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135 return True |
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136 |
73 | 137 def set_tool(self, item): |
138 self.tool = item | |
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139 if item is None: |
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140 self.screen.set_cursor(HAND) |
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141 else: |
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142 self.screen.set_cursor(item.CURSOR) |
73 | 143 |
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144 def draw(self, surface): |
120 | 145 if self.do_check and self.previous_scene and self.do_check == constants.LEAVE: |
146 # We still need to handle leave events, so still display the scene | |
147 self.previous_scene.draw(surface) | |
148 else: | |
149 self.current_scene.draw(surface) | |
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150 |
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151 def draw_detail(self, surface): |
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152 self.current_detail.draw(surface) |
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153 |
73 | 154 def interact(self, pos): |
78 | 155 return self.current_scene.interact(self.tool, pos) |
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156 |
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157 def interact_detail(self, pos): |
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158 return self.current_detail.interact(self.tool, pos) |
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159 |
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160 def animate(self): |
120 | 161 if not self.do_check: |
162 return self.current_scene.animate() | |
163 | |
164 def check_enter_leave(self): | |
165 if not self.do_check: | |
166 return None | |
167 if self.do_check == constants.LEAVE: | |
168 self.do_check = constants.ENTER | |
169 if self.previous_scene: | |
170 return self.previous_scene.leave() | |
171 return None | |
172 elif self.do_check == constants.ENTER: | |
173 self.do_check = None | |
174 # Fix descriptions, etc. | |
175 if self.old_pos: | |
176 self.current_scene.mouse_move(self.tool, self.old_pos) | |
177 return self.current_scene.enter() | |
178 raise RuntimeError('invalid do_check value %s' % self.do_check) | |
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179 |
73 | 180 def mouse_move(self, pos): |
181 self.current_scene.mouse_move(self.tool, pos) | |
120 | 182 # So we can do sensible things on enter and leave |
183 self.old_pos = pos | |
184 | |
185 def set_do_enter_leave(self): | |
186 """Flag that we need to run the enter loop""" | |
187 self.do_check = constants.LEAVE | |
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188 |
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189 def mouse_move_detail(self, pos): |
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190 self.current_detail.mouse_move(self.tool, pos) |
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191 |
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192 |
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193 class StatefulGizmo(object): |
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194 |
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195 # initial data (optional, defaults to none) |
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196 INITIAL_DATA = None |
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197 |
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198 def __init__(self): |
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199 self.data = {} |
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200 if self.INITIAL_DATA: |
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201 self.data.update(self.INITIAL_DATA) |
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202 |
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203 def set_data(self, key, value): |
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204 self.data[key] = value |
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205 |
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206 def get_data(self, key): |
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207 return self.data.get(key, None) |
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208 |
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209 |
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210 class Scene(StatefulGizmo): |
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211 """Base class for scenes.""" |
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212 |
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213 # sub-folder to look for resources in |
22 | 214 FOLDER = None |
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215 |
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216 # name of background image resource |
22 | 217 BACKGROUND = None |
218 | |
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219 # name of scene (optional, defaults to folder) |
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220 NAME = None |
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221 |
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222 # size (for detail views) |
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223 SIZE = constants.SCENE_SIZE |
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224 |
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225 def __init__(self, state): |
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226 StatefulGizmo.__init__(self) |
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227 # scene name |
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228 self.name = self.NAME if self.NAME is not None else self.FOLDER |
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229 # link back to state object |
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230 self.state = state |
22 | 231 # map of thing names -> Thing objects |
232 self.things = {} | |
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233 if self.BACKGROUND is not None: |
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234 self._background = get_image(self.FOLDER, self.BACKGROUND) |
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235 else: |
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236 self._background = None |
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237 self._current_thing = None |
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238 self._current_description = None |
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239 |
35 | 240 def add_item(self, item): |
241 self.state.add_item(item) | |
242 | |
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243 def add_thing(self, thing): |
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244 self.things[thing.name] = thing |
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245 thing.set_scene(self) |
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246 |
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247 def remove_thing(self, thing): |
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248 del self.things[thing.name] |
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249 |
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250 def _make_description(self, text): |
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251 if text is None: |
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252 return None |
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253 label = BoomLabel(text) |
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254 label.set_margin(5) |
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255 label.border_width = 1 |
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256 label.border_color = (0, 0, 0) |
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257 label.bg_color = (127, 127, 127) |
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258 label.fg_color = (0, 0, 0) |
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259 return label |
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260 |
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261 def draw_description(self, surface): |
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262 if self._current_description is not None: |
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263 sub = self.state.screen.get_root().surface.subsurface( |
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264 Rect(5, 5, *self._current_description.size)) |
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265 self._current_description.draw_all(sub) |
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266 |
22 | 267 def draw_background(self, surface): |
130
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268 if self._background is not None: |
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269 surface.blit(self._background, (0, 0), None) |
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270 else: |
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271 surface.fill((200, 200, 200)) |
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272 |
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273 def draw_things(self, surface): |
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274 for thing in self.things.itervalues(): |
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275 thing.draw(surface) |
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276 |
22 | 277 def draw(self, surface): |
278 self.draw_background(surface) | |
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279 self.draw_things(surface) |
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280 self.draw_description(surface) |
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281 |
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282 def interact(self, item, pos): |
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283 """Interact with a particular position. |
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284 |
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285 Item may be an item in the list of items or None for the hand. |
78 | 286 |
287 Returns a Result object to provide feedback to the player. | |
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288 """ |
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289 for thing in self.things.itervalues(): |
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290 if thing.contains(pos): |
78 | 291 result = thing.interact(item) |
292 if result: | |
293 if self._current_thing: | |
294 # Also update descriptions if needed | |
295 self._current_description = self._make_description( | |
296 self._current_thing.get_description()) | |
297 return result | |
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298 |
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299 def animate(self): |
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300 """Animate all the things in the scene. |
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301 |
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302 Return true if any of them need to queue a redraw""" |
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303 result = False |
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304 for thing in self.things.itervalues(): |
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305 if thing.animate(): |
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306 result = True |
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307 return result |
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308 |
120 | 309 def enter(self): |
310 return None | |
311 | |
312 def leave(self): | |
313 self._current_description = None | |
314 return None | |
315 | |
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316 def mouse_move(self, item, pos): |
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317 """Call to check whether the cursor has entered / exited a thing. |
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318 |
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319 Item may be an item in the list of items or None for the hand. |
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320 """ |
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321 if self._current_thing is not None: |
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322 if self._current_thing.contains(pos): |
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323 self.state.screen.cursor_highlight(True) |
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324 return |
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325 else: |
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326 self._current_thing.leave() |
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327 self._current_thing = None |
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328 self._current_description = None |
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329 for thing in self.things.itervalues(): |
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330 if thing.contains(pos): |
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331 thing.enter(item) |
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332 self._current_thing = thing |
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333 self._current_description = self._make_description( |
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334 thing.get_description()) |
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335 break |
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336 self.state.screen.cursor_highlight(self._current_thing is not None) |
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337 |
125
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338 def get_detail_size(self): |
127
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339 return self._background.get_size() |
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340 |
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341 |
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342 class Interact(object): |
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343 |
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344 def __init__(self, image, rect, interact_rect): |
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345 self.image = image |
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346 self.rect = rect |
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347 self.interact_rect = interact_rect |
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348 |
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349 def set_thing(self, thing): |
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350 pass |
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351 |
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352 def draw(self, surface): |
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353 if self.image is not None: |
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354 surface.blit(self.image, self.rect, None) |
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355 |
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356 def animate(self): |
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357 return False |
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358 |
86
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359 |
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360 class InteractNoImage(Interact): |
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361 |
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362 def __init__(self, x, y, w, h): |
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363 super(InteractNoImage, self).__init__(None, None, Rect(x, y, w, h)) |
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364 |
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365 |
130
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366 class InteractText(Interact): |
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367 """Display box with text to interact with -- mostly for debugging.""" |
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368 |
132
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369 def __init__(self, x, y, text, bg_color=None): |
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370 if bg_color is None: |
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371 bg_color = (127, 127, 127) |
130
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372 label = BoomLabel(text) |
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373 label.set_margin(5) |
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374 label.border_width = 1 |
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375 label.border_color = (0, 0, 0) |
132
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376 label.bg_color = bg_color |
130
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377 label.fg_color = (0, 0, 0) |
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378 image = Surface(label.size) |
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379 rect = Rect((x, y), label.size) |
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380 label.draw_all(image) |
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381 super(InteractText, self).__init__(image, rect, rect) |
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382 |
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383 |
94
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384 class InteractRectUnion(Interact): |
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385 |
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386 def __init__(self, rect_list): |
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387 # pygame.rect.Rect.unionall should do this, but is broken |
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388 # in some pygame versions (including 1.8, it appears) |
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389 rect_list = [Rect(x) for x in rect_list] |
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390 union_rect = rect_list[0] |
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391 for rect in rect_list[1:]: |
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392 union_rect = union_rect.union(rect) |
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393 super(InteractRectUnion, self).__init__(None, None, union_rect) |
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394 self.interact_rect = rect_list |
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395 |
86
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396 |
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397 class InteractImage(Interact): |
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398 |
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399 def __init__(self, x, y, image_name): |
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400 super(InteractImage, self).__init__(None, None, None) |
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401 self._pos = (x, y) |
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402 self._image_name = image_name |
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403 |
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404 def set_thing(self, thing): |
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405 self.image = get_image(thing.folder, self._image_name) |
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406 self.rect = Rect(self._pos, self.image.get_size()) |
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407 self.interact_rect = self.rect |
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408 |
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409 |
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410 class InteractAnimated(Interact): |
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411 """Interactive with an animation rather than an image""" |
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412 |
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413 # FIXME: Assumes all images are the same size |
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414 # anim_seq - sequence of image names |
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415 # delay - number of frames to wait between changing images |
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416 |
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417 def __init__(self, x, y, anim_seq, delay): |
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418 self._pos = (x, y) |
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419 self._anim_pos = 0 |
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420 self._names = anim_seq |
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421 self._frame_count = 0 |
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422 self._anim_seq = None |
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423 self._delay = delay |
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424 |
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425 def set_thing(self, thing): |
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426 self._anim_seq = [get_image(thing.folder, x) for x in self._names] |
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427 self.image = self._anim_seq[0] |
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428 self.rect = Rect(self._pos, self.image.get_size()) |
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429 self.interact_rect = self.rect |
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430 |
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431 def animate(self): |
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432 if self._anim_seq: |
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433 self._frame_count += 1 |
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434 if self._frame_count > self._delay: |
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435 self._frame_count = 0 |
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436 self._anim_pos += 1 |
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437 if self._anim_pos >= len(self._anim_seq): |
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438 self._anim_pos = 0 |
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439 self.image = self._anim_seq[self._anim_pos] |
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440 # queue redraw |
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441 return True |
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442 return False |
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443 |
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444 |
55
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445 class Thing(StatefulGizmo): |
22 | 446 """Base class for things in a scene that you can interact with.""" |
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447 |
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448 # name of thing |
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449 NAME = None |
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450 |
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451 # sub-folder to look for resources in (defaults to scenes folder) |
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452 FOLDER = None |
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453 |
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454 # list of Interact objects |
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455 INTERACTS = {} |
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456 |
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457 # name first interact |
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458 INITIAL = None |
41
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459 |
68
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460 # Interact rectangle hi-light color (for debugging) |
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461 # (set to None to turn off) |
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462 if constants.DEBUG: |
75 | 463 _interact_hilight_color = Color('red') |
68
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464 else: |
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465 _interact_hilight_color = None |
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466 |
86
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467 def __init__(self): |
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468 StatefulGizmo.__init__(self) |
86
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469 # name of the thing |
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470 self.name = self.NAME |
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471 # folder for resource (None is overridden by scene folder) |
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472 self.folder = self.FOLDER |
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473 # interacts |
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474 self.interacts = self.INTERACTS |
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475 # these are set by set_scene |
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476 self.scene = None |
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477 self.state = None |
86
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478 self.current_interact = None |
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479 self.rect = None |
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480 # TODO: add masks |
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481 |
39
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482 def set_scene(self, scene): |
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483 assert self.scene is None |
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484 self.scene = scene |
86
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485 if self.folder is None: |
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486 self.folder = scene.FOLDER |
39
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487 self.state = scene.state |
86
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488 for interact in self.interacts.itervalues(): |
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489 interact.set_thing(self) |
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490 self.set_interact(self.INITIAL) |
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|
491 |
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492 def set_interact(self, name): |
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493 self.current_interact = self.interacts[name] |
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494 self.rect = self.current_interact.interact_rect |
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495 assert self.rect is not None, name |
39
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|
496 |
94
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497 def contains(self, pos): |
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498 if hasattr(self.rect, 'collidepoint'): |
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499 return self.rect.collidepoint(pos) |
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500 else: |
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501 # FIXME: add sanity check |
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502 for rect in list(self.rect): |
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503 if rect.collidepoint(pos): |
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504 return True |
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505 return False |
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|
506 |
63
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|
507 def get_description(self): |
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|
508 return None |
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|
509 |
56
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|
510 def is_interactive(self): |
133
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511 return self.current_interact is not None |
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|
512 |
71
99c5506de7ea
Start of interact handling.
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|
513 def enter(self, item): |
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|
514 """Called when the cursor enters the Thing.""" |
139
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515 pass |
71
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|
516 |
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517 def leave(self): |
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|
518 """Called when the cursr leaves the Thing.""" |
139
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519 pass |
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520 |
22 | 521 def interact(self, item): |
56
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522 if not self.is_interactive(): |
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|
523 return |
41
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524 if item is None: |
78 | 525 return self.interact_without() |
41
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526 else: |
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527 handler = getattr(self, 'interact_with_' + item.name, None) |
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528 if handler is not None: |
78 | 529 return handler(item) |
41
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530 else: |
78 | 531 return self.interact_default(item) |
41
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|
532 |
105
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533 def animate(self): |
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534 return self.current_interact.animate() |
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|
535 |
41
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|
536 def interact_without(self): |
78 | 537 return self.interact_default(None) |
41
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|
538 |
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|
539 def interact_default(self, item): |
78 | 540 return Result("It doesn't work.") |
22 | 541 |
23
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diff
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|
542 def draw(self, surface): |
86
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|
543 self.current_interact.draw(surface) |
68
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|
544 if self._interact_hilight_color is not None: |
94
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|
545 if hasattr(self.rect, 'collidepoint'): |
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|
546 frame_rect(surface, self._interact_hilight_color, |
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|
547 self.rect.inflate(1, 1), 1) |
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|
548 else: |
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|
549 for rect in self.rect: |
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|
550 frame_rect(surface, self._interact_hilight_color, |
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|
551 rect.inflate(1, 1), 1) |
23
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diff
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|
552 |
22 | 553 |
554 class Item(object): | |
555 """Base class for inventory items.""" | |
556 | |
35 | 557 # image for inventory |
558 INVENTORY_IMAGE = None | |
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|
559 |
35 | 560 def __init__(self, name): |
561 self.name = name | |
562 self.inventory_image = get_image('items', self.INVENTORY_IMAGE) | |
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changeset
|
563 # TODO: needs cursor |
22 | 564 |
34
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|
565 def get_inventory_image(self): |
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|
566 return self.inventory_image |
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diff
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|
567 |
167
5845a3ed4dad
Inventory interaction can (surprisingly) affect the inventory
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diff
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|
568 def interact(self, tool, state): |
166
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|
569 handler = getattr(self, 'interact_with_' + tool.name, None) |
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|
570 inverse_handler = getattr(tool, 'interact_with_' + self.name, None) |
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|
571 if handler is not None: |
167
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Inventory interaction can (surprisingly) affect the inventory
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|
572 return handler(tool, state) |
166
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|
573 elif inverse_handler is not None: |
167
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diff
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|
574 return inverse_handler(self, state) |
166
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|
575 else: |
167
5845a3ed4dad
Inventory interaction can (surprisingly) affect the inventory
Neil Muller <neil@dip.sun.ac.za>
parents:
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576 return self.interact_default(tool, state) |
166
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Add inventory interactions
Neil Muller <neil@dip.sun.ac.za>
parents:
161
diff
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|
577 |
167
5845a3ed4dad
Inventory interaction can (surprisingly) affect the inventory
Neil Muller <neil@dip.sun.ac.za>
parents:
166
diff
changeset
|
578 def interact_default(self, tool, state): |
166
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Neil Muller <neil@dip.sun.ac.za>
parents:
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579 return Result("That doesn't do anything useful") |
0db92b3b5833
Add inventory interactions
Neil Muller <neil@dip.sun.ac.za>
parents:
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changeset
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580 |