/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/map.py
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revision 249 by bh, Tue Jul 30 14:17:33 2002 UTC revision 559 by jonathan, Wed Mar 26 11:05:33 2003 UTC
# Line 7  Line 7 
7    
8  __version__ = "$Revision$"  __version__ = "$Revision$"
9    
10  from messages import LAYERS_CHANGED, MAP_PROJECTION_CHANGED, \  #from messages import MAP_LAYERS_CHANGED, MAP_PROJECTION_CHANGED, \
11       CHANGED, LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \       #CHANGED, LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \
12       LAYER_VISIBILITY_CHANGED       #LAYER_VISIBILITY_CHANGED
13    
14    from messages import *
15    
16    from Thuban import _
17    
18  from base import TitledObject, Modifiable  from base import TitledObject, Modifiable
19    
# Line 25  class Map(TitledObject, Modifiable): Line 29  class Map(TitledObject, Modifiable):
29    
30          TITLE_CHANGED -- The title has changed. Parameter: the map.          TITLE_CHANGED -- The title has changed. Parameter: the map.
31    
32          LAYERS_CHANGED -- Layers were added, removed or rearranged.          MAP_LAYERS_CHANGED -- Layers were added, removed or rearranged.
33                          Parameters: the map                          Parameters: the map
34    
35          MAP_PROJECTION_CHANGED -- the map's projection has changed.          MAP_PROJECTION_CHANGED -- the map's projection has changed.
36                          Parameter: the map                          Parameter: the map
37      """      """
38    
39      forwarded_channels = (LAYER_PROJECTION_CHANGED,      forwarded_channels = (CHANGED,
40                              LAYER_PROJECTION_CHANGED,
41                            LAYER_LEGEND_CHANGED,                            LAYER_LEGEND_CHANGED,
42                              LAYER_CHANGED,
43                            LAYER_VISIBILITY_CHANGED)                            LAYER_VISIBILITY_CHANGED)
44    
45      def __init__(self, title, projection = None):      def __init__(self, title, projection = None):
46          """Initialize the map."""          """Initialize the map."""
47          TitledObject.__init__(self, title)          TitledObject.__init__(self, title)
48            Modifiable.__init__(self)
49          self.layers = []          self.layers = []
50          self.label_layer = LabelLayer("Labels")          self.label_layer = LabelLayer(_("Labels"))
51          self.label_layer.Subscribe(CHANGED, self.forward, LAYERS_CHANGED)          self.label_layer.Subscribe(CHANGED, self.forward, MAP_LAYERS_CHANGED)
52          self.projection = projection          self.projection = projection
53    
54      def Destroy(self):      def Destroy(self):
# Line 51  class Map(TitledObject, Modifiable): Line 58  class Map(TitledObject, Modifiable):
58          # cause problems.          # cause problems.
59          Modifiable.Destroy(self)          Modifiable.Destroy(self)
60          self.ClearLayers()          self.ClearLayers()
61          self.label_layer.Unsubscribe(CHANGED, self.forward, LAYERS_CHANGED)          self.label_layer.Unsubscribe(CHANGED, self.forward, MAP_LAYERS_CHANGED)
62          self.label_layer.Destroy()          self.label_layer.Destroy()
63    
64      def AddLayer(self, layer):      def AddLayer(self, layer):
65          """Append layer to the map on top opf all."""          """Append layer to the map on top opf all."""
66          self.layers.append(layer)          self.layers.append(layer)
67          self.subscribe_layer_channels(layer)          self.subscribe_layer_channels(layer)
68          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
69            self.changed(MAP_LAYERS_ADDED, self)
70    
71      def RemoveLayer(self, layer):      def RemoveLayer(self, layer):
72          """Remove layer from the map."""          """Remove layer from the map."""
73          self.unsubscribe_layer_channels(layer)          self.unsubscribe_layer_channels(layer)
74          self.layers.remove(layer)          self.layers.remove(layer)
75          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
76            self.changed(MAP_LAYERS_REMOVED, self)
77          layer.Destroy()          layer.Destroy()
78    
79        def CanRemoveLayer(self, layer):
80            """Return true if the layer can be deleted.
81    
82            The default implementation always returns 1. Derived classes
83            should override this method if they have e.g. special layers
84            that the user should not be able to remove.
85            """
86            return 1
87    
88      def ClearLayers(self):      def ClearLayers(self):
89          """Delete all layers."""          """Delete all layers."""
90          for layer in self.layers:          for layer in self.layers:
# Line 74  class Map(TitledObject, Modifiable): Line 92  class Map(TitledObject, Modifiable):
92              layer.Destroy()              layer.Destroy()
93          del self.layers[:]          del self.layers[:]
94          self.label_layer.ClearLabels()          self.label_layer.ClearLabels()
95          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
96            self.changed(MAP_LAYERS_REMOVED, self)
97    
98      def subscribe_layer_channels(self, layer):      def subscribe_layer_channels(self, layer):
99          """Subscribe to some of layer's channels."""          """Subscribe to some of layer's channels."""
# Line 104  class Map(TitledObject, Modifiable): Line 123  class Map(TitledObject, Modifiable):
123          """Swap the layer with the one above it.          """Swap the layer with the one above it.
124    
125          If the layer is already at the top do nothing. If the stacking          If the layer is already at the top do nothing. If the stacking
126          order has been changed, issue a LAYERS_CHANGED message.          order has been changed, issue a MAP_LAYERS_CHANGED message.
127          """          """
128          index = self.layers.index(layer)          index = self.layers.index(layer)
129          if index < len(self.layers) - 1:          if index < len(self.layers) - 1:
130              del self.layers[index]              del self.layers[index]
131              self.layers.insert(index + 1, layer)              self.layers.insert(index + 1, layer)
132              self.changed(LAYERS_CHANGED, self)              self.changed(MAP_LAYERS_CHANGED, self)
133                self.changed(MAP_STACKING_CHANGED, self)
134    
135      def LowerLayer(self, layer):      def LowerLayer(self, layer):
136          """Swap the layer with the one below it.          """Swap the layer with the one below it.
137    
138          If the layer is already at the bottom do nothing. If the          If the layer is already at the bottom do nothing. If the
139          stacking order has been changed, issue a LAYERS_CHANGED message.          stacking order has been changed, issue a MAP_LAYERS_CHANGED message.
140          """          """
141          index = self.layers.index(layer)          index = self.layers.index(layer)
142          if index > 0:          if index > 0:
143              del self.layers[index]              del self.layers[index]
144              self.layers.insert(index - 1, layer)              self.layers.insert(index - 1, layer)
145              self.changed(LAYERS_CHANGED, self)              self.changed(MAP_LAYERS_CHANGED, self)
146                self.changed(MAP_STACKING_CHANGED, self)
147    
148      def BoundingBox(self):      def BoundingBox(self):
149          """Return the bounding box of the map in Lat/Lon coordinates.          """Return the bounding box of the map in Lat/Lon coordinates.
# Line 198  class Map(TitledObject, Modifiable): Line 219  class Map(TitledObject, Modifiable):
219      def TreeInfo(self):      def TreeInfo(self):
220          items = []          items = []
221          if self.BoundingBox() != None:          if self.BoundingBox() != None:
222              items.append("Extent (lat-lon): (%g, %g, %g, %g)"              items.append(_("Extent (lat-lon): (%g, %g, %g, %g)")
223                           % self.BoundingBox())                           % self.BoundingBox())
224              if self.projection and len(self.projection.params) > 0:              if self.projection and len(self.projection.params) > 0:
225                  items.append("Extent (projected): (%g, %g, %g, %g)"                  items.append(_("Extent (projected): (%g, %g, %g, %g)")
226                               % self.ProjectedBoundingBox())                               % self.ProjectedBoundingBox())
227                  items.append(("Projection",                  items.append((_("Projection"),
228                                [str(param)                                [str(param)
229                                 for param in self.projection.params]))                                 for param in self.projection.params]))
230    
# Line 211  class Map(TitledObject, Modifiable): Line 232  class Map(TitledObject, Modifiable):
232          layers.reverse()          layers.reverse()
233          items.extend(layers)          items.extend(layers)
234    
235          return ("Map: %s" % self.title, items)          return (_("Map: %s") % self.title, items)
236    
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