Source Code for Module _Framework.DisplayDataSource

 1  #Embedded file name: /Users/versonator/Hudson/live/Projects/AppLive/Resources/MIDI Remote Scripts/_Framework/DisplayDataSource.py 
 2   
 3   
 4 -class DisplayDataSource(object): 
 5      """ 
 6      Data object that is fed with a specific string and notifies a 
 7      observer via its update_callback. 
 8      """ 
 9   
10 -    def __init__(self, display_string = '', separator = None, *a, **k): 
11          super(DisplayDataSource, self).__init__(*a, **k) 
12          self._display_string = display_string 
13          self._separator = separator 
14          self._update_callback = None 
15          self._represented_data_source = None 
16          self._in_update = False 
17   
18 -    def _get_separator(self): 
19          return self._separator 
20   
21 -    def _set_separator(self, separator): 
22          if separator != self._separator: 
23              self._separator = separator 
24              self.update() 
25   
26      separator = property(_get_separator, _set_separator) 
27   
28 -    def set_update_callback(self, update_callback): 
29          if not (not update_callback or callable(update_callback)): 
30              raise AssertionError 
31              self._update_callback = update_callback 
32              update_callback and self.update() 
33   
34 -    def set_display_string(self, new_string): 
35          if not new_string != None: 
36              raise AssertionError 
37              raise isinstance(new_string, str) or isinstance(new_string, unicode) or AssertionError 
38              self._display_string = self._display_string != new_string and new_string 
39              self.update() 
40   
41 -    def connect_to(self, data_source): 
42          if self._represented_data_source != None: 
43              self._represented_data_source.set_update_callback(None) 
44          self._represented_data_source = data_source 
45          if self._represented_data_source != None: 
46              self._represented_data_source.set_update_callback(self.update) 
47          self.update() 
48   
49 -    def disconnect_from(self, data_source): 
50          raise data_source != None or AssertionError 
51          raise data_source == self._represented_data_source or AssertionError 
52          self.connect_to(None) 
53   
54 -    def update(self): 
55          if not not self._in_update: 
56              raise AssertionError 
57              self._in_update = True 
58              self._update_callback != None and self._update_callback() 
59          self._in_update = False 
60   
61 -    def display_string(self): 
62          return self._display_string if self._represented_data_source == None else self._represented_data_source.display_string() 
63