/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/resource.py
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revision 1830 by bh, Thu Oct 16 16:36:00 2003 UTC revision 1940 by bh, Tue Nov 11 18:27:39 2003 UTC
# Line 91  def write_proj_file(pf): Line 91  def write_proj_file(pf):
91      saver = ProjFileSaver(pf)      saver = ProjFileSaver(pf)
92      saver.write(pf.GetFilename())      saver.write(pf.GetFilename())
93    
94    #
95    # Constants for the get_system_proj_file function
96    #
97    
98  def get_system_proj_file():  # The default projection file with a few predefined projections
99      """Return the standard projections and a list with warnings  DEFAULT_PROJ_FILE = "defaults.proj"
100    
101      The projections read from the default thuban projection file  # The epsg projections.
102      (usually in Resources/Projections/defaults.proj). The return value  EPSG_PROJ_FILE = "epsg.proj"
103      is a tuple with the projections in a ProjFile object and a list of  
104      strings with warning messages. The warnings list is usually empty  # Deprecated EPSG projections.
105      but may contain messages about ignored errors.  EPSG_DEPRECATED_PROJ_FILE = "epsg-deprecated.proj"
106    
107    def get_system_proj_file(filename):
108        """Return the projections from the indicated file and a list with warnings
109    
110        The filename argument should be the name of a file in the directory
111        with Thuban's default projection files (Resources/Projections/). If
112        possible callers should not use hardwired string literal for the
113        name to avoid unnecessary duplication. Instead they should use one
114        of the predefined constants, currently DEFAULT_PROJ_FILE,
115        EPSG_PROJ_FILE or EPSG_DEPRECATED_PROJ_FILE.
116    
117        The return value is a tuple with the projections in a ProjFile
118        object and a list of strings with warning messages. The warnings
119        list is usually empty but may contain messages about ignored errors.
120    
121      If the file could could not be opened return an empty projection      If the file could could not be opened return an empty projection
122      file object set to store data in the default file.      file object set to store data in the indicated default file.
123      """      """
124      filename = os.path.join(projdir, "defaults.proj")      fullname = os.path.join(projdir, filename)
125      try:      try:
126          return read_proj_file(filename)          return read_proj_file(fullname)
127      except (OSError, IOError, SAXParseException), val:      except (OSError, IOError, SAXParseException), val:
128          msg = _('Could not read "%s": %s') % (filename, str(val))          msg = _('Could not read "%s": %s') % (fullname, str(val))
129          return ProjFile(filename), [msg]          return ProjFile(fullname), [msg]
130    
131  def get_user_proj_file():  def get_user_proj_file():
132      """Return the user's projections and a list with warnings      """Return the user's projections and a list with warnings
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