/[thuban]/trunk/thuban/Thuban/Model/layer.py
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revision 2644 by bh, Tue Jul 5 16:30:51 2005 UTC revision 2804 by bernhard, Wed Jan 9 00:34:37 2008 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003, 2004, 2005 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2007 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]>
# Line 12  __version__ = "$Revision$" Line 12  __version__ = "$Revision$"
12  import os  import os
13  import warnings  import warnings
14    
15    from wxproj import shape_centroid
16    
17  from Thuban import _  from Thuban import _
18    
19  from messages import LAYER_PROJECTION_CHANGED, LAYER_VISIBILITY_CHANGED, \  from messages import LAYER_PROJECTION_CHANGED, LAYER_VISIBILITY_CHANGED, \
# Line 22  import classification Line 24  import classification
24  from color import Transparent, Black  from color import Transparent, Black
25  from base import TitledObject, Modifiable  from base import TitledObject, Modifiable
26  from data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT  from data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT
27    from label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \
28         ALIGN_LEFT, ALIGN_RIGHT
29    
30  import resource  import resource
31    
# Line 343  class Layer(BaseLayer): Line 347  class Layer(BaseLayer):
347    
348          return (left, bottom, right, top)          return (left, bottom, right, top)
349    
350        def GetLabelPosFromShape(self, cmap, shape_index):
351            '''
352            Return the label position parameters (x, y, halign, valign) from the
353            shape object
354            '''
355            proj = cmap.projection
356            if proj is not None:
357                map_proj = proj
358            else:
359                map_proj = None
360            proj = self.projection
361            if proj is not None:
362                layer_proj = proj
363            else:
364                layer_proj = None
365    
366            shapetype = self.ShapeType()
367            if shapetype == SHAPETYPE_POLYGON:
368                shapefile = self.ShapeStore().Shapefile().cobject()
369                x, y = shape_centroid(shapefile, shape_index,
370                                      map_proj, layer_proj, 1, 1, 0, 0)
371                if map_proj is not None:
372                    x, y = map_proj.Inverse(x, y)
373            else:
374                shape = self.Shape(shape_index)
375                if shapetype == SHAPETYPE_POINT:
376                    x, y = shape.Points()[0][0]
377                else:
378                    # assume SHAPETYPE_ARC
379                    points = shape.Points()[0]
380                    x, y = points[len(points) / 2]
381                if layer_proj is not None:
382                    x, y = layer_proj.Inverse(x, y)
383            if shapetype == SHAPETYPE_POINT:
384                halign = ALIGN_LEFT
385                valign = ALIGN_CENTER
386            elif shapetype == SHAPETYPE_POLYGON:
387                halign = ALIGN_CENTER
388                valign = ALIGN_CENTER
389            elif shapetype == SHAPETYPE_ARC:
390                halign = ALIGN_LEFT
391                valign = ALIGN_CENTER
392            
393            return (x, y, halign, valign)
394    
395    
396    
397  if resource.has_gdal_support():  if resource.has_gdal_support():
398      import gdal      import gdal
# Line 355  class RasterLayer(BaseLayer): Line 405  class RasterLayer(BaseLayer):
405      MASK_ALPHA = 2      MASK_ALPHA = 2
406    
407      def __init__(self, title, filename, projection = None,      def __init__(self, title, filename, projection = None,
408                   visible = True, opacity = 1, masktype = MASK_BIT):                   visible = True, opacity = 1, masktype = MASK_ALPHA):
409          """Initialize the Raster Layer.          """Initialize the Raster Layer.
410    
411          title -- title for the layer.          title -- title for the layer.
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