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annotate pyntnclick/widgets/base.py @ 682:0749438e325e pyntnclick

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Unified Scene widgetry.
author Jeremy Thurgood <firxen@gmail.com>
date Sun, 12 Feb 2012 23:59:26 +0200
parents fa168b5e2624
children d6ded808cc33
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1 import collections
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2
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3 import pygame
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4 from pygame.locals import (MOUSEBUTTONDOWN, MOUSEBUTTONUP,
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5 MOUSEMOTION, SRCALPHA, USEREVENT)
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6
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f9f04cb35697 s/mamba/pyntnclick/
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7 from pyntnclick.engine import UserEvent
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8
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9
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10 class Widget(object):
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11
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12 def __init__(self, rect, gd):
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13 if not isinstance(rect, pygame.Rect):
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14 rect = pygame.Rect(rect, (0, 0))
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15 self.rect = rect
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16 self.gd = gd
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17 self.resource = gd.resource
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18 self.modal = False
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19 self.parent = None
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20 self.disabled = False
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21 self.callbacks = collections.defaultdict(list)
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22
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23 def add_callback(self, eventtype, callback, *args):
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24 self.callbacks[eventtype].append((callback, args))
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25
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26 def event(self, ev):
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27 "Don't override this without damn good reason"
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28 if self.disabled:
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29 return True
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30
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31 type_ = ev.type
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32 if type_ == USEREVENT:
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33 for k in self.callbacks.iterkeys():
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34 if (isinstance(k, type) and issubclass(k, UserEvent)
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35 and k.matches(ev)):
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36 type_ = k
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37 break
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38
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39 for callback, args in self.callbacks[type_]:
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40 if callback(ev, self, *args):
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41 return True
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42 return False
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43
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44 def draw(self, surface):
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45 "Override me"
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46 pass
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47
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48 def disable(self):
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49 if not self.disabled:
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50 self.disabled = True
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51 if hasattr(self, 'prepare'):
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52 self.prepare()
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53
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54 def enable(self):
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55 if self.disabled:
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56 self.disabled = False
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57 if hasattr(self, 'prepare'):
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58 self.prepare()
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59
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60 def global_to_local(self, pos):
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61 x, y = pos
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62 return (x - self.rect.left, y - self.rect.top)
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63
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64
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65 class Button(Widget):
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66
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67 def event(self, ev):
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68 if super(Button, self).event(ev):
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69 return True
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70 if ev.type == MOUSEBUTTONDOWN:
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71 for callback, args in self.callbacks['clicked']:
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72 if callback(ev, self, *args):
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73 return True
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74 return False
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75
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76 def forced_click(self):
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77 """Force calling the clicked handler"""
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78 for callback, args in self.callbacks['clicked']:
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79 if callback(None, self, *args):
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80 return True
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81 return False
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82
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83
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84 class Container(Widget):
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85
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86 def __init__(self, rect, gd):
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87 if rect is None:
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88 rect = pygame.Rect(0, 0, 0, 0)
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89 super(Container, self).__init__(rect, gd)
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90 self.children = []
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91
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92 def event(self, ev):
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93 """Push an event down through the tree, and fire our own event as a
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94 last resort
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95 """
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96 if ev.type in (MOUSEMOTION, MOUSEBUTTONUP, MOUSEBUTTONDOWN):
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97 for child in self.children[:]:
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98 if child.rect.collidepoint(ev.pos):
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99 if child.event(ev):
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100 return True
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101
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102 else:
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103 # Other events go to all children first
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104 for child in self.children[:]:
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105 if child.event(ev):
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106 return True
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107 if super(Container, self).event(ev):
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108 return True
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109
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110 def add(self, widget):
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111 widget.parent = self
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112 self.children.append(widget)
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113 self.rect = self.rect.union(widget.rect)
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114 return widget
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115
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116 def remove(self, widget):
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117 widget.parent = None
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118 self.children.remove(widget)
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119
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120 def remove_all(self):
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121 for widget in reversed(self.children[:]):
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122 self.remove(widget)
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123
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124 def draw(self, surface):
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125 for child in self.children:
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126 child.draw(surface)
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127
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128
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129 class ModalStackContainer(Container):
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130
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131 def __init__(self, rect, gd, obscure_color=None):
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132 super(ModalStackContainer, self).__init__(rect, gd)
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133 if obscure_color is None:
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134 obscure_color = gd.constants.modal_obscure_color
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135 self.obscure_color = convert_color(obscure_color)
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136
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137 def event(self, ev):
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138 """Only the topmost child gets events.
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139 """
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140 if self.children[-1].event(ev):
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141 return True
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142
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143 if super(Container, self).event(ev):
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144 return True
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145
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146 def is_top(self, widget):
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147 if self.children:
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148 return self.children[-1] is widget
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149 return False
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150
678
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151 def draw(self, surface):
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152 obscure = pygame.Surface(self.rect.size, SRCALPHA)
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153 obscure.fill(self.obscure_color)
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154 for child in self.children:
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155 surface.blit(obscure, self.rect)
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156 child.draw(surface)
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157
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158
555
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159 class GridContainer(Container):
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160 """Hacky container that only supports grids, won't work with Container
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161 children, or modal children.
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162 """
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163
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164 def __init__(self, width, rect=None):
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165 super(GridContainer, self).__init__(rect)
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166 self.width = width
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167
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168 def add(self, widget):
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169 assert not isinstance(widget, Container)
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170 assert not widget.modal
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171 super(GridContainer, self).add(widget)
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172
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173
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174 class Box(Container):
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175 """A container that draws a filled background with a border"""
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176 padding = 4
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177
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178 def draw(self, surface):
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179 expandrect = self.rect.move((-self.padding, -self.padding))
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180 expandrect.width = self.rect.width + 2 * self.padding
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181 expandrect.height = self.rect.height + 2 * self.padding
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182 border = pygame.Surface(expandrect.size, SRCALPHA)
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183 border.fill(pygame.Color('black'))
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184 surface.blit(border, expandrect)
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185 background = pygame.Surface(self.rect.size, SRCALPHA)
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186 background.fill(pygame.Color('gray'))
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187 surface.blit(background, self.rect)
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188 super(Box, self).draw(surface)
670
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189
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190
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191 def convert_color(color):
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192 """Give me a pygame Color, dammit"""
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193 if isinstance(color, pygame.Color):
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194 return color
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195 if isinstance(color, basestring):
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196 return pygame.Color(color)
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197 return pygame.Color(*color)