/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/map.py
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revision 319 by bh, Fri Sep 13 14:21:24 2002 UTC revision 882 by jonathan, Fri May 9 16:34:28 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, LAYER_CHANGED, MAP_STACKING_CHANGED, \
13         MAP_LAYERS_ADDED, MAP_LAYERS_REMOVED
14    
15    from Thuban import _
16    
17  from base import TitledObject, Modifiable  from base import TitledObject, Modifiable
18    
19  from label import LabelLayer  from label import LabelLayer
20    
21    
   
22  class Map(TitledObject, Modifiable):  class Map(TitledObject, Modifiable):
23    
24      """Represent a map. A map is simply a list of layers.      """Represent a map. A map is simply a list of layers.
# Line 25  class Map(TitledObject, Modifiable): Line 27  class Map(TitledObject, Modifiable):
27    
28          TITLE_CHANGED -- The title has changed. Parameter: the map.          TITLE_CHANGED -- The title has changed. Parameter: the map.
29    
30          LAYERS_CHANGED -- Layers were added, removed or rearranged.          MAP_LAYERS_CHANGED -- Layers were added, removed or rearranged.
31                          Parameters: the map                          Parameters: the map
32    
33          MAP_PROJECTION_CHANGED -- the map's projection has changed.          MAP_PROJECTION_CHANGED -- the map's projection has changed.
# Line 35  class Map(TitledObject, Modifiable): Line 37  class Map(TitledObject, Modifiable):
37      forwarded_channels = (CHANGED,      forwarded_channels = (CHANGED,
38                            LAYER_PROJECTION_CHANGED,                            LAYER_PROJECTION_CHANGED,
39                            LAYER_LEGEND_CHANGED,                            LAYER_LEGEND_CHANGED,
40                              LAYER_CHANGED,
41                            LAYER_VISIBILITY_CHANGED)                            LAYER_VISIBILITY_CHANGED)
42    
43      def __init__(self, title, projection = None):      def __init__(self, title, projection = None):
# Line 42  class Map(TitledObject, Modifiable): Line 45  class Map(TitledObject, Modifiable):
45          TitledObject.__init__(self, title)          TitledObject.__init__(self, title)
46          Modifiable.__init__(self)          Modifiable.__init__(self)
47          self.layers = []          self.layers = []
48          self.label_layer = LabelLayer("Labels")          self.label_layer = LabelLayer(_("Labels"))
49          self.label_layer.Subscribe(CHANGED, self.forward, LAYERS_CHANGED)          self.label_layer.Subscribe(CHANGED, self.forward, MAP_LAYERS_CHANGED)
50          self.projection = projection          self.projection = projection
51    
52      def Destroy(self):      def Destroy(self):
# Line 53  class Map(TitledObject, Modifiable): Line 56  class Map(TitledObject, Modifiable):
56          # cause problems.          # cause problems.
57          Modifiable.Destroy(self)          Modifiable.Destroy(self)
58          self.ClearLayers()          self.ClearLayers()
59          self.label_layer.Unsubscribe(CHANGED, self.forward, LAYERS_CHANGED)          self.label_layer.Unsubscribe(CHANGED, self.forward, MAP_LAYERS_CHANGED)
60          self.label_layer.Destroy()          self.label_layer.Destroy()
61    
62      def AddLayer(self, layer):      def AddLayer(self, layer):
63          """Append layer to the map on top opf all."""          """Append layer to the map on top opf all."""
64          self.layers.append(layer)          self.layers.append(layer)
65          self.subscribe_layer_channels(layer)          self.subscribe_layer_channels(layer)
66          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
67            self.changed(MAP_LAYERS_ADDED, self)
68    
69      def RemoveLayer(self, layer):      def RemoveLayer(self, layer):
70          """Remove layer from the map."""          """Remove layer from the map."""
71          self.unsubscribe_layer_channels(layer)          self.unsubscribe_layer_channels(layer)
72          self.layers.remove(layer)          self.layers.remove(layer)
73          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
74            self.changed(MAP_LAYERS_REMOVED, self)
75          layer.Destroy()          layer.Destroy()
76    
77      def CanRemoveLayer(self, layer):      def CanRemoveLayer(self, layer):
# Line 85  class Map(TitledObject, Modifiable): Line 90  class Map(TitledObject, Modifiable):
90              layer.Destroy()              layer.Destroy()
91          del self.layers[:]          del self.layers[:]
92          self.label_layer.ClearLabels()          self.label_layer.ClearLabels()
93          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
94            self.changed(MAP_LAYERS_REMOVED, self)
95    
96      def subscribe_layer_channels(self, layer):      def subscribe_layer_channels(self, layer):
97          """Subscribe to some of layer's channels."""          """Subscribe to some of layer's channels."""
# Line 115  class Map(TitledObject, Modifiable): Line 121  class Map(TitledObject, Modifiable):
121          """Swap the layer with the one above it.          """Swap the layer with the one above it.
122    
123          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
124          order has been changed, issue a LAYERS_CHANGED message.          order has been changed, issue a MAP_LAYERS_CHANGED message.
125          """          """
126          index = self.layers.index(layer)          index = self.layers.index(layer)
127          if index < len(self.layers) - 1:          if index < len(self.layers) - 1:
128              del self.layers[index]              del self.layers[index]
129              self.layers.insert(index + 1, layer)              self.layers.insert(index + 1, layer)
130              self.changed(LAYERS_CHANGED, self)              self.changed(MAP_LAYERS_CHANGED, self)
131                self.changed(MAP_STACKING_CHANGED, self)
132    
133      def LowerLayer(self, layer):      def LowerLayer(self, layer):
134          """Swap the layer with the one below it.          """Swap the layer with the one below it.
135    
136          If the layer is already at the bottom do nothing. If the          If the layer is already at the bottom do nothing. If the
137          stacking order has been changed, issue a LAYERS_CHANGED message.          stacking order has been changed, issue a MAP_LAYERS_CHANGED message.
138          """          """
139          index = self.layers.index(layer)          index = self.layers.index(layer)
140          if index > 0:          if index > 0:
141              del self.layers[index]              del self.layers[index]
142              self.layers.insert(index - 1, layer)              self.layers.insert(index - 1, layer)
143              self.changed(LAYERS_CHANGED, self)              self.changed(MAP_LAYERS_CHANGED, self)
144                self.changed(MAP_STACKING_CHANGED, self)
145    
146      def BoundingBox(self):      def BoundingBox(self):
147          """Return the bounding box of the map in Lat/Lon coordinates.          """Return the bounding box of the map in Lat/Lon coordinates.
# Line 176  class Map(TitledObject, Modifiable): Line 184  class Map(TitledObject, Modifiable):
184              bbox = self.projection.ForwardBBox(bbox)              bbox = self.projection.ForwardBBox(bbox)
185          return bbox          return bbox
186    
187        def GetProjection(self):
188            return self.projection
189    
190      def SetProjection(self, projection):      def SetProjection(self, projection):
191          """Set the projection of the map.          """Set the projection of the map.
192    
# Line 209  class Map(TitledObject, Modifiable): Line 220  class Map(TitledObject, Modifiable):
220      def TreeInfo(self):      def TreeInfo(self):
221          items = []          items = []
222          if self.BoundingBox() != None:          if self.BoundingBox() != None:
223              items.append("Extent (lat-lon): (%g, %g, %g, %g)"              items.append(_("Extent (lat-lon): (%g, %g, %g, %g)")
224                           % self.BoundingBox())                           % self.BoundingBox())
225              if self.projection and len(self.projection.params) > 0:              if self.projection and len(self.projection.params) > 0:
226                  items.append("Extent (projected): (%g, %g, %g, %g)"                  items.append(_("Extent (projected): (%g, %g, %g, %g)")
227                               % self.ProjectedBoundingBox())                               % self.ProjectedBoundingBox())
228                  items.append(("Projection",                  items.append((_("Projection"),
229                                [str(param)                                [str(param)
230                                 for param in self.projection.params]))                                 for param in self.projection.params]))
231    
# Line 222  class Map(TitledObject, Modifiable): Line 233  class Map(TitledObject, Modifiable):
233          layers.reverse()          layers.reverse()
234          items.extend(layers)          items.extend(layers)
235    
236          return ("Map: %s" % self.title, items)          return (_("Map: %s") % self.title, items)
237    
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