Mercurial > fife-parpg

annotate engine/extensions/basicapplication.py @ 2:e84dccee1bb7

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* add myself to authors * fix missing break in guimanager * when an event occurs over an guichan window the event is marked as consumedByGuichan, but the event is still distributed to all event listeners, those can check via event.isConsumedByGuichan...
author spq@33b003aa-7bff-0310-803a-e67f0ece8222
date Tue, 01 Jul 2008 17:43:35 +0000
parents 4a0efb7baf70
children 860d81602a2a
rev   line source
0
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1 # coding: utf-8
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2
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3 """
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4 The basic application and main loop.
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5
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6 See the L{ApplicationBase} documentation.
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7 """
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8
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9 import fife
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10 import fifelog
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11 from serializers.xmlanimation import XMLAnimationLoader
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12
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13 class ExitEventListener(fife.IKeyListener):
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14 """
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15 Default, rudimentary event listener.
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16
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17 Will cause the application to quit on pressing ESC.
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18 """
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19 def __init__(self, app):
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20 self.app = app
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21 self.engine = app.engine
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22 eventmanager = self.engine.getEventManager()
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23 eventmanager.setNonConsumableKeys([fife.Key.ESCAPE])
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24 fife.IKeyListener.__init__(self)
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25 eventmanager.addKeyListener(self)
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26 self.quitRequested = False
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27
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28 def keyPressed(self, evt):
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29 keyval = evt.getKey().getValue()
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30 if keyval == fife.Key.ESCAPE:
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31 self.app.quit()
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32
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33 def keyReleased(self, evt):
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34 pass
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35
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36 class ApplicationBase(object):
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37 """
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38 ApplicationBase is an extendable class that provides a basic environment for a FIFE-based client.
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39
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40 The unextended application reads in and initializes engine settings, sets up a simple event
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41 listener, and pumps the engine while listening for a quit message. Specialized applications can
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42 modify settings.py to change initial engine settings. They can provide their own event listener
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43 by overriding L{createListener}. And they can override the L{_pump} method
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44 to define runtime behavior of the application.
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45
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46 """
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47 def __init__(self):
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48 self.engine = fife.Engine()
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49
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50 self.loadSettings()
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51 self.initLogging()
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52
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53 self.engine.init()
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54
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55 self._animationloader = XMLAnimationLoader(self.engine.getImagePool(), self.engine.getVFS())
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56 self.engine.getAnimationPool().addResourceLoader(self._animationloader)
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57
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58 self.quitRequested = False
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59 self.breakRequested = False
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60 self.returnValues = []
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61
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62 def loadSettings(self):
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63 """
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64 Load the settings from a python file and load them into the engine.
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65 Called in the ApplicationBase constructor.
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66 """
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67 import settings
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68 self.settings = settings
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69
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70 engineSetting = self.engine.getSettings()
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71 engineSetting.setDefaultFontGlyphs(settings.FontGlyphs)
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72 engineSetting.setDefaultFontPath(settings.Font)
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73 engineSetting.setDefaultFontSize(12)
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74 engineSetting.setBitsPerPixel(settings.BitsPerPixel)
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75 engineSetting.setFullScreen(settings.FullScreen)
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76 engineSetting.setInitialVolume(settings.InitialVolume)
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77 engineSetting.setRenderBackend(settings.RenderBackend)
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78 engineSetting.setSDLRemoveFakeAlpha(settings.SDLRemoveFakeAlpha)
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79 engineSetting.setScreenWidth(settings.ScreenWidth)
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80 engineSetting.setScreenHeight(settings.ScreenHeight)
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81 try:
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82 engineSetting.setImageChunkingSize(settings.ImageChunkSize)
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83 except:
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84 pass
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85
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86 def initLogging(self):
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87 """
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88 Initialize the LogManager.
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89 """
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90 self.log = fifelog.LogManager(self.engine, self.settings.LogToPrompt, self.settings.LogToFile)
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91 if self.settings.LogModules:
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92 self.log.setVisibleModules(*self.settings.LogModules)
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93
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94 def createListener(self):
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95 """
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96 This creates a default event listener, which will just close the program
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97 after pressing ESC.
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98
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99 You should override this method to provide your own event handling.
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100 """
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101 return ExitEventListener(self)
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102
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103 def run(self):
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104 """
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105 Initialize the event listener and event loop - and start it.
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106 """
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107 eventlistener = self.createListener()
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108 self.engine.initializePumping()
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109 retval = self.mainLoop()
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110 self.engine.finalizePumping()
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111 return retval
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112
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113 def mainLoop(self):
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114 """
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115 The programs main loop.
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116
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117 Do not override this, instead provide your own L{_pump} method.
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118 You can call this recursively, e.g. to provide synchronous
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119 Dialogs :-) and break out of the current mainLoop by calling
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120 L{breakFromMainLoop}. It will return the argument passed
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121 to L{breakFromMainLoop}.
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122 """
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123 self.returnValues.append(None)
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124 while not self.quitRequested:
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125 try:
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126 self.engine.pump()
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127 except RuntimeError, e:
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128 print str(e)
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129
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130 self._pump()
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131
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132 if self.breakRequested:
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133 self.breakRequested = False
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134 break
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135
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136 return self.returnValues.pop()
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137
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138 def breakFromMainLoop(self,returnValue):
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139 """
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140 Break from the currently running L{mainLoop}.
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141
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142 The passed argument will be returned by the mainLoop.
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143 """
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144 self.returnValues[-1] = returnValue
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145 self.breakRequested = True
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146
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147
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148 def _pump(self):
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149 """
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150 Application pump.
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151
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152 Derived classes can specialize this for unique behavior.
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153 This is called every frame.
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154 """
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155
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156 def quit(self):
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157 """
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158 Quit the application. Really!
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159 """
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160 self.quitRequested = True