/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/map.py
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revision 231 by bh, Fri Jul 19 15:13:05 2002 UTC revision 245 by bh, Mon Jul 29 13:37:55 2002 UTC
# Line 46  class Map(TitledObject, Modifiable): Line 46  class Map(TitledObject, Modifiable):
46    
47      def Destroy(self):      def Destroy(self):
48          for layer in self.layers:          for layer in self.layers:
49                self.unsubscribe_layer_channels(layer)
50              layer.Destroy()              layer.Destroy()
51          self.label_layer.Unsubscribe(CHANGED, self.forward, LAYERS_CHANGED)          self.label_layer.Unsubscribe(CHANGED, self.forward, LAYERS_CHANGED)
52          Modifiable.Destroy(self)          Modifiable.Destroy(self)
53    
54      def AddLayer(self, layer):      def AddLayer(self, layer):
55          self.layers.append(layer)          self.layers.append(layer)
56          for channel in self.forwarded_channels:          self.subscribe_layer_channels(layer)
             layer.Subscribe(channel, self.forward, channel)  
57          self.changed(LAYERS_CHANGED, self)          self.changed(LAYERS_CHANGED, self)
58    
59      def RemoveLayer(self, layer):      def RemoveLayer(self, layer):
60          for channel in self.forwarded_channels:          self.unsubscribe_layer_channels(layer)
             layer.Unsubscribe(channel, self.forward, channel)  
61          self.layers.remove(layer)          self.layers.remove(layer)
62          self.changed(LAYERS_CHANGED, self)          self.changed(LAYERS_CHANGED, self)
63          layer.Destroy()          layer.Destroy()
64    
65        def subscribe_layer_channels(self, layer):
66            """Subscribe to some of layer's channels."""
67            for channel in self.forwarded_channels:
68                layer.Subscribe(channel, self.forward, channel)
69    
70        def unsubscribe_layer_channels(self, layer):
71            """Unsubscribe to some of layer's channels."""
72            for channel in self.forwarded_channels:
73                layer.Unsubscribe(channel, self.forward, channel)
74    
75      def LabelLayer(self):      def LabelLayer(self):
76          """Return the Map's label layer"""          """Return the Map's label layer"""
77          return self.label_layer          return self.label_layer
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