/[thuban]/trunk/thuban/Thuban/Model/layer.py
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revision 389 by jonathan, Mon Feb 10 15:25:30 2003 UTC revision 492 by jonathan, Mon Mar 10 10:44:57 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002 by Intevation GmbH  # Copyright (c) 2001, 2002 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4    # Jonathan Coles <[email protected]>
5  #  #
6  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
7  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 18  from messages import LAYER_PROJECTION_CH Line 19  from messages import LAYER_PROJECTION_CH
19       LAYER_VISIBILITY_CHANGED       LAYER_VISIBILITY_CHANGED
20    
21  from color import Color  from color import Color
 # Some predefined colors for internal use  
 _black = Color(0, 0, 0)  
22    
23  from classification import Classification  import classification
24    
25  from table import Table  from table import Table
26    
# Line 108  class Layer(BaseLayer): Line 107  class Layer(BaseLayer):
107      """      """
108    
109      def __init__(self, title, filename, projection = None,      def __init__(self, title, filename, projection = None,
110                   fill = None, stroke = _black, stroke_width = 1, visible = 1):                   fill = Color.None,
111                     stroke = Color.Black,
112                     lineWidth = 1,
113                     visible = 1):
114          """Initialize the layer.          """Initialize the layer.
115    
116          title -- the title          title -- the title
# Line 116  class Layer(BaseLayer): Line 118  class Layer(BaseLayer):
118          projection -- the projection object. Its Inverse method is          projection -- the projection object. Its Inverse method is
119                 assumed to map the layer's coordinates to lat/long                 assumed to map the layer's coordinates to lat/long
120                 coordinates                 coordinates
121          fill -- the fill color or None if the shapes are not filled          fill -- the fill color or Color.None if the shapes are not filled
122          stroke -- the stroke color or None if the shapes are not stroked          stroke -- the stroke color or Color.None if the shapes are not stroked
123          visible -- boolean. If true the layer is visible.          visible -- boolean. If true the layer is visible.
124    
125          colors are expected to be instances of Color class          colors are expected to be instances of Color class
# Line 131  class Layer(BaseLayer): Line 133  class Layer(BaseLayer):
133          self.filename = os.path.abspath(filename)          self.filename = os.path.abspath(filename)
134    
135          self.projection = projection          self.projection = projection
         self.fill = fill  
         self.stroke = stroke  
         self.stroke_width = stroke_width  
136          self.shapefile = None          self.shapefile = None
137          self.shapetree = None          self.shapetree = None
138          self.open_shapefile()          self.open_shapefile()
# Line 143  class Layer(BaseLayer): Line 142  class Layer(BaseLayer):
142          self.shapetable = Table(filename)          self.shapetable = Table(filename)
143          self.table = self.shapetable          self.table = self.shapetable
144    
145          self.classification = Classification(self)          #
146          self.classification.SetDefaultStroke(stroke)          # this is really important so that when the classification class
147          self.classification.SetDefaultStrokeWidth(stroke_width)          # tries to set its parent layer the variable will exist
148          self.classification.SetDefaultFill(fill)          #
149            self.__classification = None
150    
151    
152            self.SetClassification(None)
153    
154            self.__classification.SetDefaultLineColor(stroke)
155            self.__classification.SetDefaultLineWidth(lineWidth)
156            self.__classification.SetDefaultFill(fill)
157            self.__classification.SetLayer(self)
158    
159          self.UnsetModified()          self.UnsetModified()
160    
# Line 209  class Layer(BaseLayer): Line 217  class Layer(BaseLayer):
217          else:          else:
218              return None              return None
219    
220        def GetFieldType(self, fieldName):
221            self.open_shapefile()
222            info = self.table.field_info_by_name(fieldName)
223            if info is not None:
224                return info[0]
225            else:
226                return None
227    
228      def NumShapes(self):      def NumShapes(self):
229          """Return the number of shapes in the layer"""          """Return the number of shapes in the layer"""
230          self.open_shapefile()          self.open_shapefile()
# Line 251  class Layer(BaseLayer): Line 267  class Layer(BaseLayer):
267          self.projection = projection          self.projection = projection
268          self.changed(LAYER_PROJECTION_CHANGED, self)          self.changed(LAYER_PROJECTION_CHANGED, self)
269    
270        def GetClassification(self):
271            return self.__classification
272    
273        def SetClassification(self, clazz):
274            """Set the classification to 'clazz'
275    
276            If 'clazz' is None a default classification is created
277            """
278    
279            if clazz is None:
280                self.__classification = classification.Classification()
281            else:
282    
283                # prevent infinite recursion when calling SetLayer()
284                if clazz == self.__classification:
285                    return
286    
287                self.__classification = clazz
288                self.__classification.SetLayer(self)
289    
290            self.changed(LAYER_LEGEND_CHANGED, self)
291    
292        def ClassChanged(self):
293            """Called from the classification object when it has changed."""
294            self.changed(LAYER_LEGEND_CHANGED, self)
295    
296      def TreeInfo(self):      def TreeInfo(self):
297          items = []          items = []
298    
# Line 267  class Layer(BaseLayer): Line 309  class Layer(BaseLayer):
309              items.append(_("Extent (lat-lon):"))              items.append(_("Extent (lat-lon):"))
310          items.append(_("Shapetype: %s") % shapetype_names[self.ShapeType()])          items.append(_("Shapetype: %s") % shapetype_names[self.ShapeType()])
311    
312          def color_string(color):          items.append(self.__classification)
             if color is None:  
                 return "None"  
             return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)  
   
         # layers will always have a classification with at least a NULL data set  
   
         #items.append((_("Fill: %s") % color_string(self.fill), self.fill))  
         #items.append((_("Outline: %s") % color_string(self.stroke), self.stroke))  
   
         items.append(self.classification)  
313    
314          return (_("Layer '%s'") % self.Title(), items)          return (_("Layer '%s'") % self.Title(), items)
315    
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