/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/base.py
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revision 240 by bh, Wed Jul 24 17:16:09 2002 UTC revision 2413 by bernhard, Mon Nov 22 11:16:35 2004 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  #  #
# Line 6  Line 6 
6  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
7    
8  """  """
9  Various base classes that didn't fir elsewhere  Various base classes that did not fit elsewhere.
10  """  """
11    
12  __version__ = "$Revision$"  __version__ = "$Revision$"
13    
14  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
15    
16  from messages import TITLE_CHANGED  from messages import TITLE_CHANGED, CHANGED
17    
18  class TitledObject:  class TitledObject:
19    
# Line 27  class TitledObject: Line 27  class TitledObject:
27    
28      def SetTitle(self, title):      def SetTitle(self, title):
29          self.title = title          self.title = title
         self.issue(TITLE_CHANGED, self)  
30    
31            # FIXME: The TitledObject is almost always used in conjunction
32            # with Modifiable (the only exceptions currently are the
33            # tables). We should reall derive TitledObject from modifiable
34            # (would be good for the tables too) but that's taking things a
35            # bit far at the moment.
36            if hasattr(self, 'changed'):
37                self.changed(TITLE_CHANGED, self)
38    
39  class Modifiable(Publisher):  class Modifiable(Publisher):
40    
# Line 42  class Modifiable(Publisher): Line 48  class Modifiable(Publisher):
48          return self.modified          return self.modified
49    
50      def UnsetModified(self):      def UnsetModified(self):
51          """Unset the modified flag"""          """Unset the modified flag.
52    
53            If the modified flag is changed from set to unset by the call,
54            issue a CHANGED message.
55    
56            The modified flag itself is part of the state of the object so
57            some other objects such as a field in the status bar indication
58            whether e.g. the session has changed might be interested in
59            being notified when this flag has changed.
60            """
61            was_modified = self.modified
62          self.modified = 0          self.modified = 0
63            if was_modified:
64                self.issue(CHANGED)
65    
66      def changed(self, channel = None, *args):      def changed(self, channel = None, *args):
67          """Set the modified flag and issue a message          """Set the modified flag and optionally issue a message
68    
69          The message is issued on the channel given by channel with args          The message is issued on the channel given by channel with args
70          as the arguments.          as the arguments. If channel is None issue no message.
71    
72          Subclasses should call this method whenever anything has          Subclasses should call this method whenever anything has
73          changed.          changed.
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