/[thuban]/trunk/thuban/Thuban/Model/layer.py
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revision 1535 by bh, Fri Aug 1 14:27:13 2003 UTC revision 1599 by bh, Mon Aug 18 12:45:28 2003 UTC
# Line 8  Line 8 
8    
9  __version__ = "$Revision$"  __version__ = "$Revision$"
10    
11    import os
12  import warnings  import warnings
13    
14  from Thuban import _  from Thuban import _
# Line 19  import classification Line 20  import classification
20    
21  from color import Transparent, Black  from color import Transparent, Black
22  from base import TitledObject, Modifiable  from base import TitledObject, Modifiable
23  from data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT, Shape  from data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT
24    
25  import resource  import resource
26    
# Line 253  class Layer(BaseLayer): Line 254  class Layer(BaseLayer):
254          """Return the shape with index index"""          """Return the shape with index index"""
255          return self.store.Shape(index)          return self.store.Shape(index)
256    
257      def ShapesInRegion(self, box):      def ShapesInRegion(self, bbox):
258          """Return the ids of the shapes that overlap the box.          """Return an iterable over the shapes that overlap the bounding box.
259    
260          Box is a tuple (left, bottom, right, top) in unprojected coordinates.          The bbox parameter should be the bounding box as a tuple in the
261            form (minx, miny, maxx, maxy) in unprojected coordinates.
262          """          """
         left, bottom, right, top = box  
   
263          if self.projection is not None:          if self.projection is not None:
264              left,  bottom = self.projection.Forward(left, bottom)              left, bottom, right, top = bbox
265              right, top    = self.projection.Forward(right, top)              xs = []; ys = []
266                for x, y in [(left, bottom), (left, top), (right, top),
267                             (right, bottom)]:
268                    x, y = self.projection.Forward(x, y)
269                    xs.append(x)
270                    ys.append(y)
271                bbox = (min(xs), min(ys), max(xs), max(ys))
272    
273          return self.store.ShapesInRegion((left, bottom, right, top))          return self.store.ShapesInRegion(bbox)
274    
275      def GetClassificationColumn(self):      def GetClassificationColumn(self):
276          return self.classification_column          return self.classification_column
# Line 365  class RasterLayer(BaseLayer): Line 371  class RasterLayer(BaseLayer):
371          BaseLayer.__init__(self, title, visible = visible)          BaseLayer.__init__(self, title, visible = visible)
372    
373          self.projection = projection          self.projection = projection
374          self.filename = filename          self.filename = os.path.abspath(filename)
375    
376          self.bbox = -1          self.bbox = -1
377    
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