/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/proj.py
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revision 1815 by bh, Mon Oct 13 15:53:39 2003 UTC revision 1860 by jan, Fri Oct 24 16:01:39 2003 UTC
# Line 7  Line 7 
7    
8  __version__ = "$Revision$"  __version__ = "$Revision$"
9    
 from Thuban import _  
   
10  from types import StringTypes  from types import StringTypes
11    
12    from Thuban import _
13    from Thuban.Lib.connector import Publisher
14    
15  import Projection  import Projection
16  BaseProjection = Projection.Projection  BaseProjection = Projection.Projection
17  del Projection  del Projection
18    
19    from messages import PROJECTION_ADDED, PROJECTION_REPLACED, PROJECTION_REMOVED
20    
21  PROJ_UNITS_METERS  = 1  PROJ_UNITS_METERS  = 1
22  PROJ_UNITS_DEGREES = 2  PROJ_UNITS_DEGREES = 2
23    
# Line 101  class Projection(BaseProjection): Line 104  class Projection(BaseProjection):
104          return self.params          return self.params
105    
106      def GetProjectedUnits(self):      def GetProjectedUnits(self):
107          if self.GetParameter("proj") == "latlong":          if self.GetParameter("proj") in [ 'latlong', 'longlat' ]:
108              return PROJ_UNITS_DEGREES              return PROJ_UNITS_DEGREES
109          else:          else:
110              return PROJ_UNITS_METERS              return PROJ_UNITS_METERS
# Line 110  class Projection(BaseProjection): Line 113  class Projection(BaseProjection):
113          return self.name + ": " + repr(self.params)          return self.name + ": " + repr(self.params)
114    
115    
116  class ProjFile:  class ProjFile(Publisher):
117    
118      def __init__(self, filename):      def __init__(self, filename):
119          """Intialize the ProjFile.          """Intialize the ProjFile.
# Line 121  class ProjFile: Line 124  class ProjFile:
124          self.__projs = []          self.__projs = []
125    
126          self.SetFilename(filename)          self.SetFilename(filename)
127        
128      def Add(self, proj):      def Add(self, proj):
129          """Add the projection to the end of the file."""          """Add the projection to the end of the file."""
130          self.__projs.append(proj)          self.__projs.append(proj)
131            self.issue(PROJECTION_ADDED, proj)
132    
133      def Remove(self, proj):      def Remove(self, proj):
134          """Remove the object proj from the projection file.          """Remove the object proj from the projection file.
135    
136          Raises a ValueError is proj is not found.          Raises a ValueError is proj is not found.
137          """          """
   
138          self.__projs.remove(proj)          self.__projs.remove(proj)
139            self.issue(PROJECTION_REMOVED, proj)
140    
141      def Replace(self, oldproj, newproj):      def Replace(self, oldproj, newproj):
142          """Replace the object 'oldproj' with 'newproj'.          """Replace the object 'oldproj' with 'newproj'.
143            
144          Raises ValueError if oldproj is not in the file.          Raises ValueError if oldproj is not in the file.
145          """          """
   
         #  
         # see if the projection already exists.  
         # this only works if Projection doesn't override __eq__  
         #  
146          self.__projs[self.__projs.index(oldproj)] = newproj          self.__projs[self.__projs.index(oldproj)] = newproj
147            self.issue(PROJECTION_REPLACED, oldproj, newproj)
148    
149      def GetFilename(self):      def GetFilename(self):
150          """Return the filename where the ProjFile was read or will be          """Return the filename where the ProjFile was read or will be
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