/[thuban]/trunk/thuban/Thuban/Model/layer.py
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revision 217 by bh, Wed Jul 17 10:50:40 2002 UTC revision 374 by jan, Mon Jan 27 14:20:02 2003 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    from Thuban import _
14    
15  import shapelib, shptree  import shapelib, shptree
16    
17  from messages import LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \  from messages import LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \
# Line 18  from color import Color Line 21  from color import Color
21  # Some predefined colors for internal use  # Some predefined colors for internal use
22  _black = Color(0, 0, 0)  _black = Color(0, 0, 0)
23    
24    from classification import Classification
25    
26  from table import Table  from table import Table
27    
# Line 83  class BaseLayer(TitledObject, Modifiable Line 87  class BaseLayer(TitledObject, Modifiable
87          """Set the layer's visibility."""          """Set the layer's visibility."""
88          self.visible = visible          self.visible = visible
89          self.issue(LAYER_VISIBILITY_CHANGED, self)          self.issue(LAYER_VISIBILITY_CHANGED, self)
90            
91            
92  class Layer(BaseLayer):  class Layer(BaseLayer):
93    
94      """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 123  class Layer(BaseLayer):
123          colors are expected to be instances of Color class          colors are expected to be instances of Color class
124          """          """
125          BaseLayer.__init__(self, title, visible = visible)          BaseLayer.__init__(self, title, visible = visible)
126          self.filename = filename  
127            # Make the filename absolute. The filename will be
128            # interpreted relative to that anyway, but when saving a
129            # session we need to compare absolute paths and it's usually
130            # safer to always work with absolute paths.
131            self.filename = os.path.abspath(filename)
132    
133          self.projection = projection          self.projection = projection
134          self.fill = fill          self.fill = fill
135          self.stroke = stroke          self.stroke = stroke
# Line 133  class Layer(BaseLayer): Line 143  class Layer(BaseLayer):
143          self.shapetable = Table(filename)          self.shapetable = Table(filename)
144          self.table = self.shapetable          self.table = self.shapetable
145    
146            self.classification = Classification()
147            self.classification.setNull(
148                {'stroke':stroke, 'stroke_width':stroke_width, 'fill':fill})
149    
150      def open_shapefile(self):      def open_shapefile(self):
151          if self.shapefile is None:          if self.shapefile is None:
152              self.shapefile = shapelib.ShapeFile(self.filename)              self.shapefile = shapelib.ShapeFile(self.filename)
# Line 159  class Layer(BaseLayer): Line 173  class Layer(BaseLayer):
173              self.shapetree = shptree.SHPTree(self.shapefile.cobject(), 2,              self.shapetree = shptree.SHPTree(self.shapefile.cobject(), 2,
174                                               maxdepth)                                               maxdepth)
175    
176        def Destroy(self):
177            BaseLayer.Destroy(self)
178            if self.shapefile is not None:
179                self.shapefile.close()
180                self.shapefile = None
181                self.shapetree = None
182            self.table.Destroy()
183    
184      def BoundingBox(self):      def BoundingBox(self):
185          """Return the layer's bounding box in the intrinsic coordinate system.          """Return the layer's bounding box in the intrinsic coordinate system.
186    
# Line 200  class Layer(BaseLayer): Line 222  class Layer(BaseLayer):
222          """Return the shape with index index"""          """Return the shape with index index"""
223          self.open_shapefile()          self.open_shapefile()
224          shape = self.shapefile.read_object(index)          shape = self.shapefile.read_object(index)
225    
226          if self.shapetype == SHAPETYPE_POINT:          if self.shapetype == SHAPETYPE_POINT:
227              points = shape.vertices()              points = shape.vertices()
228          else:          else:
# Line 208  class Layer(BaseLayer): Line 231  class Layer(BaseLayer):
231              points = []              points = []
232              for x, y in poly:              for x, y in poly:
233                  points.append((x, y))                  points.append((x, y))
234    
235          return Shape(points)          return Shape(points)
236    
237      def ShapesInRegion(self, box):      def ShapesInRegion(self, box):
# Line 244  class Layer(BaseLayer): Line 268  class Layer(BaseLayer):
268          items = []          items = []
269    
270          if self.Visible():          if self.Visible():
271              items.append("Shown")              items.append(_("Shown"))
272          else:          else:
273              items.append("Hidden")              items.append(_("Hidden"))
274          items.append("Shapes: %d" % self.NumShapes())          items.append(_("Shapes: %d") % self.NumShapes())
275    
276          bbox = self.LatLongBoundingBox()          bbox = self.LatLongBoundingBox()
277          if bbox is not None:          if bbox is not None:
278              items.append("Extent (lat-lon): (%g, %g, %g, %g)" % bbox)              items.append(_("Extent (lat-lon): (%g, %g, %g, %g)") % bbox)
279          else:          else:
280              items.append("Extent (lat-lon):")              items.append(_("Extent (lat-lon):"))
281          items.append("Shapetype: %s" % shapetype_names[self.ShapeType()])          items.append(_("Shapetype: %s") % shapetype_names[self.ShapeType()])
282    
283          def color_string(color):          def color_string(color):
284              if color is None:              if color is None:
285                  return "None"                  return "None"
286              return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)              return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)
287          items.append("Fill: " + color_string(self.fill))          items.append(_("Fill: ") + color_string(self.fill))
288          items.append("Outline: " + color_string(self.stroke))          items.append(_("Outline: ") + color_string(self.stroke))
289    
290          return ("Layer '%s'" % self.Title(), items)          return (_("Layer '%s'") % self.Title(), items)
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