Source Code for Script script-demo_scratchBridge_py

 1  from joy import * 
 2  import re 
 3   
 4 -class ScratchBridge(JoyApp): 
 5 -  def __init__(self,count=None,names={},walk=False): 
 6      JoyApp.__init__(self,scr={}, 
 7        robot=dict(count=count,names=names,walk=walk)) 
 8   
 9    REX_CLP = re.compile("\Ackbot://(\S+)\Z") 
10     
11 -  def onStart( self ): 
12      self.cache = {} 
13     
14 -  def newSetter( self, key ): 
15      # Pattern match with CLP pattern 
16      m = self.REX_CLP.match(key) 
17      if m is None: 
18        self.cache[key] = None 
19        return None 
20      # Search for extracted CLP 
21      clp = m.group(1) 
22      try: 
23        fun = self.robot.setterOf(clp) 
24      except (KeyError,AttributeError,ValueError), ex: 
25        fun = ex 
26      # If failed --> invalid property name 
27      if isinstance(fun,StandardError): 
28        self.cache[key] = False 
29        return False 
30      # Record new cache value 
31      self.cache[key]= fun 
32      return fun 
33   
34 -  def onEvent( self, evt ): 
35      if evt.type==SCRATCHUPDATE: 
36        # Lookup in cache  
37        fun = self.cache.get(evt.var,None) 
38        # If cache hit --> call setter function 
39        if fun:  
40          fun(int(evt.value)) 
41        elif fun is False: # cached as a bad name --> ignore 
42          pass 
43        else: # New --> lookup in robot, and cache result 
44          assert fun is None 
45          fun = self.newSetter( evt.var ) 
46          if fun: 
47            fun(int(evt.value)) 
48      elif evt.type != TIMEREVENT: 
49        self.scratchifyEvent(evt) 
50        JoyApp.onEvent(self,evt) 
51         
52  if __name__=="__main__": 
53    import sys 
54    print ''' 
55    Scratch to CKBot Bridge 
56    ----------------------- 
57     
58    When running, this JoyApp exposes all properties of the CKBot 
59    cluster to Scratch. In addition, it emits game controller state 
60    updates into scratch. 
61     
62    The commandline version (which you are running now) expects 
63    the number of clusters to be given as a parameter, and will 
64    walk all those clusters, but the ScratchBridge class does not 
65    require this. If the number of clusters is not specified, 
66    the default Cluster.populate() settings are used. 
67    ''' 
68    if len(sys.argv)==2: 
69      sb = ScratchBridge(count=int(sys.argv[1]),walk=True) 
70    else: 
71      sb = ScratchBridge(walk=True) 
72       
73    DEBUG = 'S' 
74    sb.run() 
75