Mercurial > parpg-source

annotate bGrease/impl/controls.py @ 166:a6bbb732b27b

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Added .hgeol file to automatically convert line endings.
author KarstenBock@gmx.net
date Thu, 12 Jan 2012 18:42:48 +0100
parents ff3e395abf91
children
rev   line source
166
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1 #############################################################################
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2 #
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3 # Copyright (c) 2010 by Casey Duncan
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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
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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.
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11 #
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12 #############################################################################
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13 """Control systems for binding controls to game logic"""
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14
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15 import bGrease
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16 from pyglet.window import key
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17
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18 class KeyControls(grease.System):
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19 """System that maps subclass-defined action methods to keys.
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20
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21 Keys may be mapped in the subclass definition using decorators
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22 defined here as class methods or at runtime using the ``bind_key_*``
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23 instance methods.
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24
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25 See :ref:`an example implementation in the tutorial <tut-controls-example>`.
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26 """
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27 MODIFIER_MASK = ~(key.MOD_NUMLOCK | key.MOD_SCROLLLOCK | key.MOD_CAPSLOCK)
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28 """The MODIFIER_MASK allows you to filter out modifier keys that should be
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29 ignored by the application. By default, capslock, numlock, and scrolllock
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30 are ignored.
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31 """
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32
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33 world = None
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34 """:class:`grease.World` object this system is bound to"""
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35
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36 def __init__(self):
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37 self._key_press_map = {}
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38 self._key_release_map = {}
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39 self._key_hold_map = {}
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40 for name in self.__class__.__dict__:
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41 member = getattr(self, name)
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42 if hasattr(member, '_grease_hold_key_binding'):
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43 for binding in member._grease_hold_key_binding:
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44 self.bind_key_hold(member, *binding)
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45 if hasattr(member, '_grease_press_key_binding'):
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46 for binding in member._grease_press_key_binding:
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47 self.bind_key_press(member, *binding)
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48 if hasattr(member, '_grease_release_key_binding'):
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49 for binding in member._grease_release_key_binding:
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50 self.bind_key_release(member, *binding)
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51 self.held_keys = set()
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52
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53 ## decorator methods for binding methods to key input events ##
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54
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55 @classmethod
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56 def key_hold(cls, symbol, modifiers=0):
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57 """Decorator to bind a method to be executed where a key is held down"""
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58 def bind(f):
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59 if not hasattr(f, '_grease_hold_key_binding'):
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60 f._grease_hold_key_binding = []
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61 f._grease_hold_key_binding.append((symbol, modifiers & cls.MODIFIER_MASK))
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62 return f
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63 return bind
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64
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65 @classmethod
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66 def key_press(cls, symbol, modifiers=0):
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67 """Decorator to bind a method to be executed where a key is initially depressed"""
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68 def bind(f):
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69 if not hasattr(f, '_grease_press_key_binding'):
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70 f._grease_press_key_binding = []
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71 f._grease_press_key_binding.append((symbol, modifiers & cls.MODIFIER_MASK))
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72 return f
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73 return bind
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74
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75 @classmethod
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76 def key_release(cls, symbol, modifiers=0):
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77 """Decorator to bind a method to be executed where a key is released"""
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78 def bind(f):
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79 if not hasattr(f, '_grease_release_key_binding'):
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80 f._grease_release_key_binding = []
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81 f._grease_release_key_binding.append((symbol, modifiers & cls.MODIFIER_MASK))
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82 return f
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83 return bind
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84
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85 ## runtime binding methods ##
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86
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87 def bind_key_hold(self, method, key, modifiers=0):
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88 """Bind a method to a key at runtime to be invoked when the key is
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89 held down, this replaces any existing key hold binding for this key.
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90 To unbind the key entirely, pass ``None`` for method.
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91 """
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92 if method is not None:
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93 self._key_hold_map[key, modifiers & self.MODIFIER_MASK] = method
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94 else:
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95 try:
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96 del self._key_hold_map[key, modifiers & self.MODIFIER_MASK]
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97 except KeyError:
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98 pass
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99
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100 def bind_key_press(self, method, key, modifiers=0):
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101 """Bind a method to a key at runtime to be invoked when the key is initially
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102 pressed, this replaces any existing key hold binding for this key. To unbind
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103 the key entirely, pass ``None`` for method.
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104 """
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105 if method is not None:
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106 self._key_press_map[key, modifiers & self.MODIFIER_MASK] = method
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107 else:
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108 try:
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109 del self._key_press_map[key, modifiers & self.MODIFIER_MASK]
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110 except KeyError:
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111 pass
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112
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113 def bind_key_release(self, method, key, modifiers=0):
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114 """Bind a method to a key at runtime to be invoked when the key is releaseed,
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115 this replaces any existing key hold binding for this key. To unbind
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116 the key entirely, pass ``None`` for method.
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117 """
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118 if method is not None:
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119 self._key_release_map[key, modifiers & self.MODIFIER_MASK] = method
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120 else:
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121 try:
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122 del self._key_release_map[key, modifiers & self.MODIFIER_MASK]
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123 except KeyError:
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124 pass
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125
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126 def step(self, dt):
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127 """invoke held key functions"""
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128 already_run = set()
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129 for key in self.held_keys:
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130 func = self._key_hold_map.get(key)
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131 if func is not None and func not in already_run:
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132 already_run.add(func)
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133 func(dt)
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134
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135 def on_key_press(self, key, modifiers):
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136 """Handle pyglet key press. Invoke key press methods and
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137 activate key hold functions
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138 """
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139 key_mod = (key, modifiers & self.MODIFIER_MASK)
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140 if key_mod in self._key_press_map:
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141 self._key_press_map[key_mod]()
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142 self.held_keys.add(key_mod)
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143
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144 def on_key_release(self, key, modifiers):
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145 """Handle pyglet key release. Invoke key release methods and
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146 deactivate key hold functions
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147 """
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148 key_mod = (key, modifiers & self.MODIFIER_MASK)
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149 if key_mod in self._key_release_map:
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150 self._key_release_map[key_mod]()
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151 self.held_keys.discard(key_mod)
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152
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153
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154 if __name__ == '__main__':
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155 import pyglet
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156
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157 class TestKeyControls(KeyControls):
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158
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159 MODIFIER_MASK = ~(key.MOD_NUMLOCK | key.MOD_SCROLLLOCK | key.MOD_CTRL)
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160
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161 remapped = False
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162
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163 @KeyControls.key_hold(key.UP)
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164 @KeyControls.key_hold(key.W)
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165 def up(self, dt):
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166 print 'UP!'
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167
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168 @KeyControls.key_hold(key.LEFT)
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169 @KeyControls.key_hold(key.A)
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170 def left(self, dt):
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171 print 'LEFT!'
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172
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173 @KeyControls.key_hold(key.RIGHT)
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174 @KeyControls.key_hold(key.D)
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175 def right(self, dt):
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176 print 'RIGHT!'
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177
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178 @KeyControls.key_hold(key.DOWN)
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179 @KeyControls.key_hold(key.S)
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180 def down(self, dt):
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181 print 'DOWN!'
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182
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183 @KeyControls.key_press(key.SPACE)
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184 def fire(self):
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185 print 'FIRE!'
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186
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187 @KeyControls.key_press(key.R)
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188 def remap_keys(self):
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189 if not self.remapped:
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190 self.bind_key_hold(None, key.W)
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191 self.bind_key_hold(None, key.A)
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192 self.bind_key_hold(None, key.S)
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193 self.bind_key_hold(None, key.D)
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194 self.bind_key_hold(self.up, key.I)
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195 self.bind_key_hold(self.left, key.J)
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196 self.bind_key_hold(self.right, key.L)
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197 self.bind_key_hold(self.down, key.K)
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198 else:
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199 self.bind_key_hold(None, key.I)
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200 self.bind_key_hold(None, key.J)
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201 self.bind_key_hold(None, key.K)
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202 self.bind_key_hold(None, key.L)
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203 self.bind_key_hold(self.up, key.W)
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204 self.bind_key_hold(self.left, key.A)
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205 self.bind_key_hold(self.right, key.D)
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206 self.bind_key_hold(self.down, key.S)
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207 self.remapped = not self.remapped
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208
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209
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210 window = pyglet.window.Window()
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211 window.clear()
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212 controls = TestKeyControls()
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213 window.push_handlers(controls)
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214 pyglet.clock.schedule_interval(controls.step, 0.5)
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215 pyglet.app.run()
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216