/[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 546 by jonathan, Thu Mar 20 09:44:20 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_VISIBILITY_CHANGED)                            LAYER_VISIBILITY_CHANGED)
43    
44      def __init__(self, title, projection = None):      def __init__(self, title, projection = None):
45          """Initialize the map."""          """Initialize the map."""
46          TitledObject.__init__(self, title)          TitledObject.__init__(self, title)
47            Modifiable.__init__(self)
48          self.layers = []          self.layers = []
49          self.label_layer = LabelLayer("Labels")          self.label_layer = LabelLayer(_("Labels"))
50          self.label_layer.Subscribe(CHANGED, self.forward, LAYERS_CHANGED)          self.label_layer.Subscribe(CHANGED, self.forward, MAP_LAYERS_CHANGED)
51          self.projection = projection          self.projection = projection
52    
53      def Destroy(self):      def Destroy(self):
# Line 51  class Map(TitledObject, Modifiable): Line 57  class Map(TitledObject, Modifiable):
57          # cause problems.          # cause problems.
58          Modifiable.Destroy(self)          Modifiable.Destroy(self)
59          self.ClearLayers()          self.ClearLayers()
60          self.label_layer.Unsubscribe(CHANGED, self.forward, LAYERS_CHANGED)          self.label_layer.Unsubscribe(CHANGED, self.forward, MAP_LAYERS_CHANGED)
61          self.label_layer.Destroy()          self.label_layer.Destroy()
62    
63      def AddLayer(self, layer):      def AddLayer(self, layer):
64          """Append layer to the map on top opf all."""          """Append layer to the map on top opf all."""
65          self.layers.append(layer)          self.layers.append(layer)
66          self.subscribe_layer_channels(layer)          self.subscribe_layer_channels(layer)
67          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
68            self.changed(MAP_LAYERS_ADDED, self)
69    
70      def RemoveLayer(self, layer):      def RemoveLayer(self, layer):
71          """Remove layer from the map."""          """Remove layer from the map."""
72          self.unsubscribe_layer_channels(layer)          self.unsubscribe_layer_channels(layer)
73          self.layers.remove(layer)          self.layers.remove(layer)
74          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
75            self.changed(MAP_LAYERS_REMOVED, self)
76          layer.Destroy()          layer.Destroy()
77    
78        def CanRemoveLayer(self, layer):
79            """Return true if the layer can be deleted.
80    
81            The default implementation always returns 1. Derived classes
82            should override this method if they have e.g. special layers
83            that the user should not be able to remove.
84            """
85            return 1
86    
87      def ClearLayers(self):      def ClearLayers(self):
88          """Delete all layers."""          """Delete all layers."""
89          for layer in self.layers:          for layer in self.layers:
# Line 74  class Map(TitledObject, Modifiable): Line 91  class Map(TitledObject, Modifiable):
91              layer.Destroy()              layer.Destroy()
92          del self.layers[:]          del self.layers[:]
93          self.label_layer.ClearLabels()          self.label_layer.ClearLabels()
94          self.changed(LAYERS_CHANGED, self)          self.changed(MAP_LAYERS_CHANGED, self)
95            self.changed(MAP_LAYERS_REMOVED, self)
96    
97      def subscribe_layer_channels(self, layer):      def subscribe_layer_channels(self, layer):
98          """Subscribe to some of layer's channels."""          """Subscribe to some of layer's channels."""
# Line 104  class Map(TitledObject, Modifiable): Line 122  class Map(TitledObject, Modifiable):
122          """Swap the layer with the one above it.          """Swap the layer with the one above it.
123    
124          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
125          order has been changed, issue a LAYERS_CHANGED message.          order has been changed, issue a MAP_LAYERS_CHANGED message.
126          """          """
127          index = self.layers.index(layer)          index = self.layers.index(layer)
128          if index < len(self.layers) - 1:          if index < len(self.layers) - 1:
129              del self.layers[index]              del self.layers[index]
130              self.layers.insert(index + 1, layer)              self.layers.insert(index + 1, layer)
131              self.changed(LAYERS_CHANGED, self)              self.changed(MAP_LAYERS_CHANGED, self)
132                self.changed(MAP_STACKING_CHANGED, self)
133    
134      def LowerLayer(self, layer):      def LowerLayer(self, layer):
135          """Swap the layer with the one below it.          """Swap the layer with the one below it.
136    
137          If the layer is already at the bottom do nothing. If the          If the layer is already at the bottom do nothing. If the
138          stacking order has been changed, issue a LAYERS_CHANGED message.          stacking order has been changed, issue a MAP_LAYERS_CHANGED message.
139          """          """
140          index = self.layers.index(layer)          index = self.layers.index(layer)
141          if index > 0:          if index > 0:
142              del self.layers[index]              del self.layers[index]
143              self.layers.insert(index - 1, layer)              self.layers.insert(index - 1, layer)
144              self.changed(LAYERS_CHANGED, self)              self.changed(MAP_LAYERS_CHANGED, self)
145                self.changed(MAP_STACKING_CHANGED, self)
146    
147      def BoundingBox(self):      def BoundingBox(self):
148          """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 218  class Map(TitledObject, Modifiable):
218      def TreeInfo(self):      def TreeInfo(self):
219          items = []          items = []
220          if self.BoundingBox() != None:          if self.BoundingBox() != None:
221              items.append("Extent (lat-lon): (%g, %g, %g, %g)"              items.append(_("Extent (lat-lon): (%g, %g, %g, %g)")
222                           % self.BoundingBox())                           % self.BoundingBox())
223              if self.projection and len(self.projection.params) > 0:              if self.projection and len(self.projection.params) > 0:
224                  items.append("Extent (projected): (%g, %g, %g, %g)"                  items.append(_("Extent (projected): (%g, %g, %g, %g)")
225                               % self.ProjectedBoundingBox())                               % self.ProjectedBoundingBox())
226                  items.append(("Projection",                  items.append((_("Projection"),
227                                [str(param)                                [str(param)
228                                 for param in self.projection.params]))                                 for param in self.projection.params]))
229    
# Line 211  class Map(TitledObject, Modifiable): Line 231  class Map(TitledObject, Modifiable):
231          layers.reverse()          layers.reverse()
232          items.extend(layers)          items.extend(layers)
233    
234          return ("Map: %s" % self.title, items)          return (_("Map: %s") % self.title, items)
235    
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