/[thuban]/trunk/thuban/Thuban/Model/layer.py
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revision 258 by bh, Thu Aug 15 12:48:03 2002 UTC revision 386 by jonathan, Mon Feb 3 11:44:27 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 160  class Layer(BaseLayer): Line 174  class Layer(BaseLayer):
174                                               maxdepth)                                               maxdepth)
175    
176      def Destroy(self):      def Destroy(self):
177          BaseLayer.Destroy()          BaseLayer.Destroy(self)
178          if self.shapefile is not None:          if self.shapefile is not None:
179              self.shapefile.close()              self.shapefile.close()
180              self.shapefile = None              self.shapefile = None
# Line 208  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 216  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 234  class Layer(BaseLayer): Line 250  class Layer(BaseLayer):
250    
251      def SetFill(self, fill):      def SetFill(self, fill):
252          """Set the layer's fill color. None means the shapes are not filled"""          """Set the layer's fill color. None means the shapes are not filled"""
253          self.fill = fill          null = self.classification.getNull()
254            null['fill'] = fill
255            self.classification.setNull(null)
256          self.changed(LAYER_LEGEND_CHANGED, self)          self.changed(LAYER_LEGEND_CHANGED, self)
257    
258      def SetStroke(self, stroke):      def SetStroke(self, stroke):
259          """Set the layer's stroke color. None means the shapes are not          """Set the layer's stroke color. None means the shapes are not
260          stroked."""          stroked."""
261          self.stroke = stroke          null = self.classification.getNull()
262            null['stroke'] = stroke
263            self.classification.setNull(null)
264          self.changed(LAYER_LEGEND_CHANGED, self)          self.changed(LAYER_LEGEND_CHANGED, self)
265    
266      def SetStrokeWidth(self, width):      def SetStrokeWidth(self, width):
267          """Set the layer's stroke width."""          """Set the layer's stroke width."""
268          self.stroke_width = width          null = self.classification.getNull()
269            null['stroke_width'] = width
270            self.classification.setNull(null)
271          self.changed(LAYER_LEGEND_CHANGED, self)          self.changed(LAYER_LEGEND_CHANGED, self)
272    
273      def TreeInfo(self):      def TreeInfo(self):
274          items = []          items = []
275    
276          if self.Visible():          if self.Visible():
277              items.append("Shown")              items.append(_("Shown"))
278          else:          else:
279              items.append("Hidden")              items.append(_("Hidden"))
280          items.append("Shapes: %d" % self.NumShapes())          items.append(_("Shapes: %d") % self.NumShapes())
281    
282          bbox = self.LatLongBoundingBox()          bbox = self.LatLongBoundingBox()
283          if bbox is not None:          if bbox is not None:
284              items.append("Extent (lat-lon): (%g, %g, %g, %g)" % bbox)              items.append(_("Extent (lat-lon): (%g, %g, %g, %g)") % bbox)
285          else:          else:
286              items.append("Extent (lat-lon):")              items.append(_("Extent (lat-lon):"))
287          items.append("Shapetype: %s" % shapetype_names[self.ShapeType()])          items.append(_("Shapetype: %s") % shapetype_names[self.ShapeType()])
288    
289          def color_string(color):          def color_string(color):
290              if color is None:              if color is None:
291                  return "None"                  return "None"
292              return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)              return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)
         items.append("Fill: " + color_string(self.fill))  
         items.append("Outline: " + color_string(self.stroke))  
293    
294          return ("Layer '%s'" % self.Title(), items)          # layers will always have a classification with at least a NULL data set
295    
296            #items.append((_("Fill: %s") % color_string(self.fill), self.fill))
297            #items.append((_("Outline: %s") % color_string(self.stroke), self.stroke))
298    
299            items.append(self.classification)
300    
301            return (_("Layer '%s'") % self.Title(), items)
302    
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