Mercurial > pyntnclick
annotate gamelib/state.py @ 79:d7c0a702a0b4
Factor label width setting method out into a custom class (BoomLabel).
author | Simon Cross <hodgestar+bzr@gmail.com> |
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date | Mon, 23 Aug 2010 23:09:29 +0200 |
parents | 6bfebfbce42e |
children | 593bddfacf18 |
rev | line source |
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7
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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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Start of scene drawing framework.
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3 from albow.resource import get_image, get_sound |
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4 from albow.utils import frame_rect |
79
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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 |
9
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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 |
7
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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 item name -> Item object |
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45 self.items = {} |
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46 # list of item objects in inventory |
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47 self.inventory = [] |
73 | 48 # currently selected tool (item) |
49 self.tool = None | |
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50 # current scene |
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51 self.current_scene = None |
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52 |
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53 def add_scene(self, scene): |
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54 self.scenes[scene.name] = scene |
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55 |
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56 def add_item(self, item): |
35 | 57 self.items[item.name] = item |
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58 |
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59 def load_scenes(self, modname): |
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60 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname]) |
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61 for scene_cls in mod.SCENES: |
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62 self.add_scene(scene_cls(self)) |
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63 |
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64 def set_current_scene(self, name): |
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65 self.current_scene = self.scenes[name] |
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66 |
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67 def add_inventory_item(self, name): |
33
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68 self.inventory.append(self.items[name]) |
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69 |
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70 def remove_inventory_item(self, name): |
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71 self.inventory.remove(self.items[name]) |
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72 |
73 | 73 def set_tool(self, item): |
74 self.tool = item | |
75 | |
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76 def draw(self, surface): |
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77 self.current_scene.draw(surface) |
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78 |
73 | 79 def interact(self, pos): |
78 | 80 return self.current_scene.interact(self.tool, pos) |
71
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81 |
73 | 82 def mouse_move(self, pos): |
83 self.current_scene.mouse_move(self.tool, pos) | |
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84 |
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85 |
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86 class StatefulGizmo(object): |
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87 |
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88 # initial data (optional, defaults to none) |
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89 INITIAL_DATA = None |
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90 |
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91 def __init__(self): |
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92 self.data = {} |
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93 if self.INITIAL_DATA: |
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94 self.data.update(self.INITIAL_DATA) |
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95 |
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96 def set_data(self, key, value): |
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97 self.data[key] = value |
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98 |
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99 def get_data(self, key): |
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100 return self.data.get(key, None) |
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101 |
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102 |
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103 class Scene(StatefulGizmo): |
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104 """Base class for scenes.""" |
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105 |
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106 # sub-folder to look for resources in |
22 | 107 FOLDER = None |
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108 |
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109 # name of background image resource |
22 | 110 BACKGROUND = None |
111 | |
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112 # name of scene (optional, defaults to folder) |
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113 NAME = None |
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114 |
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115 def __init__(self, state): |
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116 StatefulGizmo.__init__(self) |
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117 # scene name |
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118 self.name = self.NAME if self.NAME is not None else self.FOLDER |
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119 # link back to state object |
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120 self.state = state |
22 | 121 # map of thing names -> Thing objects |
122 self.things = {} | |
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123 self._background = get_image(self.FOLDER, self.BACKGROUND) |
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124 self._current_thing = None |
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125 self._current_description = None |
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126 |
35 | 127 def add_item(self, item): |
128 self.state.add_item(item) | |
129 | |
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130 def add_thing(self, thing): |
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131 self.things[thing.name] = thing |
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132 thing.set_scene(self) |
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133 |
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134 def remove_thing(self, thing): |
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135 del self.things[thing.name] |
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136 |
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137 def _make_description(self, text): |
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138 if text is None: |
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139 return None |
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140 label = BoomLabel(text) |
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141 label.set_margin(5) |
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142 label.border_width = 1 |
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143 label.border_color = (0, 0, 0) |
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144 label.bg_color = (127, 127, 127) |
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145 label.fg_color = (0, 0, 0) |
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146 return label |
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147 |
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148 def draw_description(self, surface): |
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149 if self._current_description is not None: |
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150 sub = surface.subsurface( |
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151 Rect(5, 5, *self._current_description.size)) |
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152 self._current_description.draw_all(sub) |
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153 |
22 | 154 def draw_background(self, surface): |
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155 surface.blit(self._background, (0, 0), None, BLEND_ADD) |
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156 |
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157 def draw_things(self, surface): |
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158 for thing in self.things.itervalues(): |
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159 thing.draw(surface) |
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160 |
22 | 161 def draw(self, surface): |
162 self.draw_background(surface) | |
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163 self.draw_things(surface) |
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164 self.draw_description(surface) |
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165 |
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166 def interact(self, item, pos): |
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167 """Interact with a particular position. |
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168 |
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169 Item may be an item in the list of items or None for the hand. |
78 | 170 |
171 Returns a Result object to provide feedback to the player. | |
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172 """ |
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173 for thing in self.things.itervalues(): |
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174 if thing.rect.collidepoint(pos): |
78 | 175 result = thing.interact(item) |
176 if result: | |
177 if self._current_thing: | |
178 # Also update descriptions if needed | |
179 self._current_description = self._make_description( | |
180 self._current_thing.get_description()) | |
181 return result | |
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182 |
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183 def mouse_move(self, item, pos): |
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184 """Call to check whether the cursor has entered / exited a thing. |
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185 |
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186 Item may be an item in the list of items or None for the hand. |
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187 """ |
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188 if self._current_thing is not None: |
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189 if self._current_thing.rect.collidepoint(pos): |
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190 return |
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191 else: |
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192 self._current_thing.leave() |
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193 self._current_thing = None |
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194 self._current_description = None |
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195 for thing in self.things.itervalues(): |
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196 if thing.rect.collidepoint(pos): |
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197 thing.enter(item) |
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198 self._current_thing = thing |
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199 self._current_description = self._make_description( |
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200 thing.get_description()) |
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201 break |
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202 |
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203 |
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204 class Thing(StatefulGizmo): |
22 | 205 """Base class for things in a scene that you can interact with.""" |
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206 |
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207 # sub-folder to look for resources in |
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208 FOLDER = None |
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209 |
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210 # name of image resource |
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211 IMAGE = None |
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212 |
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213 # Interact rectangle hi-light color (for debugging) |
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214 # (set to None to turn off) |
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215 if constants.DEBUG: |
75 | 216 _interact_hilight_color = Color('red') |
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217 else: |
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218 _interact_hilight_color = None |
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219 |
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220 def __init__(self, name, rect): |
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221 StatefulGizmo.__init__(self) |
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222 self.name = name |
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223 # area within scene to render to |
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224 self.rect = Rect(rect) |
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225 # area within scene that triggers calls to interact |
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226 self.interact_rect = Rect(rect) |
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227 # these are set by set_scene |
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228 self.scene = None |
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229 self.state = None |
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230 # TODO: add masks |
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231 # TODO: add images |
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232 |
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233 def set_scene(self, scene): |
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234 assert self.scene is None |
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235 self.scene = scene |
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236 self.state = scene.state |
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237 |
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238 def get_description(self): |
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239 return None |
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240 |
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241 def is_interactive(self): |
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242 return True |
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243 |
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244 def enter(self, item): |
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245 """Called when the cursor enters the Thing.""" |
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246 print "Enter %r -> %r" % (item, self) |
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247 |
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248 def leave(self): |
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249 """Called when the cursr leaves the Thing.""" |
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250 print "Leaves %r" % self |
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251 |
22 | 252 def interact(self, item): |
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253 if not self.is_interactive(): |
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254 return |
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255 if item is None: |
78 | 256 return self.interact_without() |
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257 else: |
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258 handler = getattr(self, 'interact_with_' + item.name, None) |
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259 if handler is not None: |
78 | 260 return handler(item) |
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261 else: |
78 | 262 return self.interact_default(item) |
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263 |
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264 def interact_without(self): |
78 | 265 return self.interact_default(None) |
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266 |
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267 def interact_default(self, item): |
78 | 268 return Result("It doesn't work.") |
22 | 269 |
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270 def draw(self, surface): |
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271 if self._interact_hilight_color is not None: |
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272 frame_rect(surface, self._interact_hilight_color, |
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273 self.interact_rect.inflate(1, 1), 1) |
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274 # TODO: draw image if there is one |
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275 |
22 | 276 |
277 class Item(object): | |
278 """Base class for inventory items.""" | |
279 | |
35 | 280 # image for inventory |
281 INVENTORY_IMAGE = None | |
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282 |
35 | 283 def __init__(self, name): |
284 self.name = name | |
285 self.inventory_image = get_image('items', self.INVENTORY_IMAGE) | |
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286 # TODO: needs cursor |
22 | 287 |
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288 def get_inventory_image(self): |
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289 return self.inventory_image |
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290 |