Mercurial > parpg-source

annotate bGrease/component/general.py @ 146:abfeac863dd6

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Items can now be dropped on the ground from the players inventory.
author KarstenBock@gmx.net
date Sun, 09 Oct 2011 20:50:31 +0200
parents e856b604b650
children
rev   line source
65
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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diff changeset
1 #############################################################################
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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2 #
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3 # Copyright (c) 2010 by Casey Duncan and contributors
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4 # All Rights Reserved.
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5 #
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6 # This software is subject to the provisions of the MIT License
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7 # A copy of the license should accompany this distribution.
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8 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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9 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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10 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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11 #
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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12 #############################################################################
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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13
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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14 __version__ = '$Id$'
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15
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
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16 from parpg.bGrease.component import base
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17 from parpg.bGrease.component import field
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18 from parpg.bGrease.entity import ComponentEntitySet
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19
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20
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21 class Component(dict):
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22 """General component with a configurable schema
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23
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24 The field schema is defined via keyword args where the
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25 arg name is the field name and the value is the type object.
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26
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27 The following types are supported for fields:
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28
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29 - :class:`int`
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30 - :class:`float`
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31 - :class:`bool`
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32 - :class:`str`
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33 - :class:`object`
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34 - |Vec2d|
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35 - |Vec2dArray|
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36 - |RGBA|
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37 - |Rect|
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38 """
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39
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40 deleted_entities = ()
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41 """List of entities deleted from the component since the last time step"""
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42
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43 new_entities = ()
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44 """List of entities added to the component since the last time step"""
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45
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46 def __init__(self, **fields):
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47 self.fields = {}
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48 for fname, ftype in fields.items():
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49 assert ftype in field.types, fname + " has an illegal field type"
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50 self.fields[fname] = field.Field(self, fname, ftype)
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51 self.entities = ComponentEntitySet(self)
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52 self._added = []
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53 self._deleted = []
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54
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55 def set_world(self, world):
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56 self.world = world
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57
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58 def step(self, dt):
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59 """Update the component for the next timestep"""
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60 delitem = super(Component, self).__delitem__
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61 for entity in self._deleted:
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62 delitem(entity)
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63 self.new_entities = self._added
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64 self.deleted_entities = self._deleted
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65 self._added = []
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66 self._deleted = []
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67
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68 def set(self, entity, data=None, **data_kw):
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69 """Set the component data for an entity, adding it to the
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70 component if it is not already a member.
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71
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72 If data is specified, its data for the new entity's fields are
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73 copied from its attributes, making it easy to copy another
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74 entity's data. Keyword arguments are also matched to fields.
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75 If both a data attribute and keyword argument are supplied for
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76 a single field, the keyword arg is used.
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77 """
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78 if data is not None:
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79 for fname, field in self.fields.items():
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80 if fname not in data_kw and hasattr(data, fname):
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81 data_kw[fname] = getattr(data, fname)
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82 data = self[entity] = Data(self.fields, entity, **data_kw)
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83 return data
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84
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85 def __setitem__(self, entity, data):
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86 assert entity.world is self.world, "Entity not in component's world"
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87 if entity not in self.entities:
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88 self._added.append(entity)
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89 self.entities.add(entity)
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90 super(Component, self).__setitem__(entity, data)
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91
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92 def remove(self, entity):
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93 if entity in self.entities:
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94 self._deleted.append(entity)
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95 self.entities.remove(entity)
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96 return True
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97 return False
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98
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99 __delitem__ = remove
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100
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101 def __repr__(self):
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102 return '<%s %x of %r>' % (
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103 self.__class__.__name__, id(self), getattr(self, 'world', None))
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104
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105
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106 class Singleton(Component):
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107 """Component that may contain only a single entity"""
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108
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109 def add(self, entity_id, data=None, **data_kw):
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110 if entity_id not in self._data:
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111 self.entity_id_set.clear()
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112 self._data.clear()
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113 Component.add(self, entity_id, data, **data_kw)
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114
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115 @property
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116 def entity(self):
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117 """Return the entity in the component, or None if empty"""
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118 if self._data:
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119 return self.manager[self._data.keys()[0]]
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120
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121
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122 class Data(object):
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123
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124 def __init__(self, fields, entity, **data):
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125 self.__dict__['_Data__fields'] = fields
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126 self.__dict__['entity'] = entity
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127 for field in fields.values():
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128 if field.name in data:
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129 setattr(self, field.name, data[field.name])
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130 else:
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131 setattr(self, field.name, field.default())
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132
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133 def __setattr__(self, name, value):
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134 if name in self.__fields:
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135 self.__dict__[name] = self.__fields[name].cast(value)
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136 else:
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137 raise AttributeError("Invalid data field: " + name)
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138
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139 def __repr__(self):
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diff changeset
140 return '<%s(%r)>' % (self.__class__.__name__, self.__dict__)
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
KarstenBock@gmx.net
parents: 41
diff changeset
141
e856b604b650 Changed "import bGrease" to "import parpg.bGrease".
KarstenBock@gmx.net
parents: 41
diff changeset
142