/[thuban]/trunk/thuban/Extensions/svgexport/svgmapwriter.py
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revision 2349 by bernhard, Tue Sep 21 21:30:36 2004 UTC revision 2350 by bernhard, Sat Sep 25 18:29:24 2004 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003, 2004 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003, 2004 by Intevation GmbH
2  # Authors:  # Authors:
3  #     Markus Rechtien <[email protected]>  #     Markus Rechtien <[email protected]>
4    #     Bernhard Reiter <[email protected]>
5  #  #
6  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
7  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 489  class VirtualDC(XMLWriter): Line 490  class VirtualDC(XMLWriter):
490              return (12,len(text) * 10)              return (12,len(text) * 10)
491            
492      def SetID(self, id):      def SetID(self, id):
493          """Set the ID stored by the svg elements."""          """Set second part of ID stored by the svg elements.
494    
495            Will be used in make_id() as first part of an XML attribute "id".
496            Read comments at SetBaseID() and make_id().
497    
498            Common practice is to only set this to integer numbers.
499            """
500          self.id = id          self.id = id
501    
502      def SetBaseID(self, id):      def SetBaseID(self, id):
503          """Set the ID stored by the svg elements."""          """Set first part of ID stored by the svg elements.
504    
505            Will be used in make_id() as first part of an XML attribute "id".
506            The second part is set by SetID().
507            Check comments at make_id().
508            """
509          self.baseid = id          self.baseid = id
510                    
511      def SetFont(self, font):      def SetFont(self, font):
# Line 576  class VirtualDC(XMLWriter): Line 588  class VirtualDC(XMLWriter):
588          """Return id= string for object out of currently set baseid and id.          """Return id= string for object out of currently set baseid and id.
589                    
590          Return the empty string if no id was set.          Return the empty string if no id was set.
591    
592            In an XML file each id should be unique
593            (see XML 1.0 section 3.3.1 Attribute Types, Validity constraint: ID)
594            So this function should only return a unique values.
595            which also coforms to the the XML "Name production" (section 3.2).
596    
597            For this it completely depends
598            on what has been set by SetBaseID() and SetID().
599            Only call this function if you have called them w unique values before
600            (or SetID(0) to get an empty result)
601    
602            A check of uniqueness in this function might be time consuming,
603            because it would require to hold and search through a complete table.
604          """          """
605          if self.id < 0:          if self.id < 0:
606              return ''              return ''
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