/[thuban]/trunk/thuban/Extensions/svgexport/svgmapwriter.py
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Diff of /trunk/thuban/Extensions/svgexport/svgmapwriter.py

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revision 2343 by bh, Fri Feb 20 14:33:22 2004 UTC revision 2344 by bernhard, Tue Sep 21 21:30:36 2004 UTC
# Line 25  import re Line 25  import re
25  from string import join  from string import join
26  # We need to determine some object types  # We need to determine some object types
27  from types import ListType  from types import ListType
28    
29    from Thuban import _
30  # VirtualDC extends XMLWriter  # VirtualDC extends XMLWriter
31  from Thuban.Model.xmlwriter import XMLWriter, escape  from Thuban.Model.xmlwriter import XMLWriter, escape
32  # Color related classes from the model of thuban  # Color related classes from the model of thuban
# Line 147  TRANSPARENT_BRUSH = Brush(None, None) Line 149  TRANSPARENT_BRUSH = Brush(None, None)
149  # Instantiate a solid pattern.  # Instantiate a solid pattern.
150  SOLID = Pattern()  SOLID = Pattern()
151    
152    class SVGMapWriterError(Exception):
153        """Get raised for problems when writing map-svg files.
154        
155        Occasion when this exception is raised:
156            Two layers have the same name to be used as BaseId: Name Clash
157        """
158    
159    
160  class SVGRenderer(BaseRenderer):  class SVGRenderer(BaseRenderer):
161      """Class to render a map onto a VirtualDC.      """Class to render a map onto a VirtualDC.
162            
# Line 163  class SVGRenderer(BaseRenderer): Line 173  class SVGRenderer(BaseRenderer):
173                  resolution, honor_visibility)                  resolution, honor_visibility)
174          #          #
175          self.factor = (abs(region[2]) + abs(region[3])) / (2.0 * 1000.0)          self.factor = (abs(region[2]) + abs(region[3])) / (2.0 * 1000.0)
176                    self.used_baseids=[]   # needed for name clash check
177    
178      def make_point(self, x, y):      def make_point(self, x, y):
179          """Return a Point object from two values."""          """Return a Point object from two values."""
180          return Point(x, y)          return Point(x, y)
# Line 231  class SVGRenderer(BaseRenderer): Line 242  class SVGRenderer(BaseRenderer):
242          dc = self.dc          dc = self.dc
243          brush = TRANSPARENT_BRUSH          brush = TRANSPARENT_BRUSH
244          pen   = TRANSPARENT_PEN          pen   = TRANSPARENT_PEN
245            
246          value = None          value = None
247          field = None          field = None
248          lc = layer.GetClassification()          lc = layer.GetClassification()
# Line 251  class SVGRenderer(BaseRenderer): Line 262  class SVGRenderer(BaseRenderer):
262                  self.low_level_renderer(layer)                  self.low_level_renderer(layer)
263          tool_cache = {}          tool_cache = {}
264                    
265          # Set baseid - prefix of a shape id to be unique          if layer.title in self.used_baseids:
266                raise SVGMapWriterError(_("Clash of layer names!\n")+ \
267                    _("Two layers probably have the same name, try renaming one."))
268            # prefix of a shape id to be unique
269          dc.SetBaseID(layer.title)          dc.SetBaseID(layer.title)
270            self.used_baseids.append(layer.title)
271          # Titel of current layer to the groups meta informations          # Titel of current layer to the groups meta informations
272          dc.BeginGroup(meta={'Layer':layer.Title(), })          dc.BeginGroup(meta={'Layer':layer.Title(), })
273          # Delete all MetaData          # Delete all MetaData
# Line 558  class VirtualDC(XMLWriter): Line 573  class VirtualDC(XMLWriter):
573          return 'meta="%s"' % (join(result, '; '))          return 'meta="%s"' % (join(result, '; '))
574            
575      def make_id(self):      def make_id(self):
576          """Get the ID for the next object - if current ID is valid."""          """Return id= string for object out of currently set baseid and id.
577            
578            Return the empty string if no id was set.
579            """
580          if self.id < 0:          if self.id < 0:
581              return ''              return ''
582          else: return 'id="%s%s"' % (self.baseid, self.id)          return 'id="%s-%s"' % (self.baseid, self.id)
583    
584      def DrawEllipse(self, x, y, dx, dy):      def DrawEllipse(self, x, y, dx, dy):
585          """Draw an ellipse."""          """Draw an ellipse."""
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