/[thuban]/trunk/thuban/Thuban/Model/layer.py
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revision 179 by bh, Wed May 15 14:02:49 2002 UTC revision 276 by bh, Fri Aug 23 15:25:07 2002 UTC
# Line 7  Line 7 
7    
8  __version__ = "$Revision$"  __version__ = "$Revision$"
9    
10    import os
11  from math import log, ceil  from math import log, ceil
12    
13  import shapelib, shptree  import shapelib, shptree
# Line 83  class BaseLayer(TitledObject, Modifiable Line 84  class BaseLayer(TitledObject, Modifiable
84          """Set the layer's visibility."""          """Set the layer's visibility."""
85          self.visible = visible          self.visible = visible
86          self.issue(LAYER_VISIBILITY_CHANGED, self)          self.issue(LAYER_VISIBILITY_CHANGED, self)
87            
88            
89  class Layer(BaseLayer):  class Layer(BaseLayer):
90    
91      """Represent the information of one geodata file (currently a shapefile)      """Represent the information of one geodata file (currently a shapefile)
# Line 119  class Layer(BaseLayer): Line 120  class Layer(BaseLayer):
120          colors are expected to be instances of Color class          colors are expected to be instances of Color class
121          """          """
122          BaseLayer.__init__(self, title, visible = visible)          BaseLayer.__init__(self, title, visible = visible)
123          self.filename = filename  
124            # Make the filename absolute. The filename will be
125            # interpreted relative to that anyway, but when saving a
126            # session we need to compare absolute paths and it's usually
127            # safer to always work with absolute paths.
128            self.filename = os.path.abspath(filename)
129    
130          self.projection = projection          self.projection = projection
131          self.fill = fill          self.fill = fill
132          self.stroke = stroke          self.stroke = stroke
# Line 159  class Layer(BaseLayer): Line 166  class Layer(BaseLayer):
166              self.shapetree = shptree.SHPTree(self.shapefile.cobject(), 2,              self.shapetree = shptree.SHPTree(self.shapefile.cobject(), 2,
167                                               maxdepth)                                               maxdepth)
168    
169        def Destroy(self):
170            BaseLayer.Destroy(self)
171            if self.shapefile is not None:
172                self.shapefile.close()
173                self.shapefile = None
174                self.shapetree = None
175            self.table.Destroy()
176    
177      def BoundingBox(self):      def BoundingBox(self):
178          """Return the layer's bounding box in the intrinsic coordinate system.          """Return the layer's bounding box in the intrinsic coordinate system.
179    
# Line 239  class Layer(BaseLayer): Line 254  class Layer(BaseLayer):
254          """Set the layer's stroke width."""          """Set the layer's stroke width."""
255          self.stroke_width = width          self.stroke_width = width
256          self.changed(LAYER_LEGEND_CHANGED, self)          self.changed(LAYER_LEGEND_CHANGED, self)
257    
258        def TreeInfo(self):
259            items = []
260    
261            if self.Visible():
262                items.append("Shown")
263            else:
264                items.append("Hidden")
265            items.append("Shapes: %d" % self.NumShapes())
266    
267            bbox = self.LatLongBoundingBox()
268            if bbox is not None:
269                items.append("Extent (lat-lon): (%g, %g, %g, %g)" % bbox)
270            else:
271                items.append("Extent (lat-lon):")
272            items.append("Shapetype: %s" % shapetype_names[self.ShapeType()])
273    
274            def color_string(color):
275                if color is None:
276                    return "None"
277                return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)
278            items.append("Fill: " + color_string(self.fill))
279            items.append("Outline: " + color_string(self.stroke))
280    
281            return ("Layer '%s'" % self.Title(), items)
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