/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/classification.py
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revision 462 by jonathan, Wed Mar 5 18:17:17 2003 UTC revision 627 by jonathan, Wed Apr 9 10:08:47 2003 UTC
# Line 16  an input value falls with a range that d Line 16  an input value falls with a range that d
16  If no mapping can be found then default data will  If no mapping can be found then default data will
17  be returned. Input values must be hashable objects  be returned. Input values must be hashable objects
18    
19  See the description of GetGroup() for more information  See the description of FindGroup() for more information
20  on the mapping algorithm.  on the mapping algorithm.
21  """  """
22        
23  # fix for people using python2.1  # fix for people using python2.1
24  from __future__ import nested_scopes  from __future__ import nested_scopes
25    
26    import copy
27    
28    from Thuban import _
29    
30  from types import *  from types import *
31    
32  from messages import LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \  from messages import \
33       LAYER_VISIBILITY_CHANGED      LAYER_PROJECTION_CHANGED, \
34        LAYER_LEGEND_CHANGED, \
35        LAYER_VISIBILITY_CHANGED
36    
 from Thuban import _  
37  from Thuban.Model.color import Color  from Thuban.Model.color import Color
38    
39  import Thuban.Model.layer  import Thuban.Model.layer
40    
   
 # constants  
 RANGE_MIN  = 0  
 RANGE_MAX  = 1  
 RANGE_DATA = 2  
   
41  class Classification:  class Classification:
42      """Encapsulates the classification of layer. The Classification      """Encapsulates the classification of layer.
43      divides some kind of data into Groups which are associated with      
44      properties. Later the properties can be retrieved by matching      The Classification divides some kind of data into Groups which
45      data values to the appropriate group."""      are associated with properties. Later the properties can be
46        retrieved by matching data values to the appropriate group.
47        """
48    
49      def __init__(self, layer = None, field = None):      def __init__(self, layer = None, field = None):
50          """Initialize a classification.          """Initialize a classification.
51    
52             layer -- the Layer object who owns this classification          layer -- the Layer object who owns this classification
53    
54             field -- the name of the data table field that          field -- the name of the data table field that
55                      is to be used to classify layer properties                   is to be used to classify layer properties
56          """          """
57    
58          self.layer = None          self.layer = None
59          self.field = None          self.field = None
60          self.fieldType = None          self.fieldType = None
61          self.groups = []          self.__groups = []
62          self.__sendMessages = False  
63            self.__setLayerLock = False
64    
         self.__ToggleMessages(False)  
65          self.SetDefaultGroup(ClassGroupDefault())          self.SetDefaultGroup(ClassGroupDefault())
66    
67          self.SetLayer(layer)          self.SetLayer(layer)
68          self.SetField(field)          self.SetField(field)
69    
         self.__ToggleMessages(True)  
   
70      def __iter__(self):      def __iter__(self):
71          return ClassIterator(self.groups)          return ClassIterator(self.__groups)
72    
73        def __deepcopy__(self, memo):
74            clazz = Classification()
75    
76            # note: the only thing that isn't copied is the layer reference
77            clazz.field = self.field
78            clazz.fieldType = self.fieldType
79            clazz.__groups[0] = copy.deepcopy(self.__groups[0])
80    
81            for i in range(1, len(self.__groups)):
82                clazz.__groups.append(copy.deepcopy(self.__groups[i]))
83    
84      def __ToggleMessages(self, on):          return clazz
         self.__sendMessages = on  
85    
86      def __SendMessage(self, message):      def __SendNotification(self):
87          """Send the message 'message' to the parent layer."""          """Notify the layer that this class has changed."""
88          if self.__sendMessages and self.layer is not None:          if self.layer is not None:
89              self.layer.changed(message, self.layer)              self.layer.ClassChanged()
90            
91      def SetField(self, field = None):      def SetField(self, field):
92          """Set the name of the data table field to use.          """Set the name of the data table field to use.
93                    
94             field -- if None then all values map to the default data          If there is no layer then the field type is set to None,
95            otherwise the layer is queried to find the type of the
96            field data
97    
98            field -- if None then all values map to the default data
99          """          """
100    
101          if field == "":          if field == "":
102              field = None              field = None
103    
         self.field = field  
104    
105          if self.layer is not None:          if field is None:
106              fieldType = self.layer.GetFieldType(field)              if self.layer is not None:
107                    self.fieldType = None
108          else:          else:
109              fieldType = None              if self.layer is not None:
110                    fieldType = self.layer.GetFieldType(field)
111                    if fieldType is None:
112                        raise ValueError("'%s' was not found in the layer's table."
113                                         % self.field)
114    
115                    #
116                    # unfortunately we cannot call SetFieldType() because it
117                    # requires the layer to be None
118                    #
119                    self.fieldType = fieldType
120                    #self.SetFieldType(fieldType)
121    
122          self.SetFieldType(fieldType)          self.field = field
   
         # XXX: if fieldType comes back None then field isn't in the table!  
123    
124          self.__SendMessage(LAYER_LEGEND_CHANGED)          self.__SendNotification()
125    
126      def GetField(self):      def GetField(self):
127          """Return the name of the field."""          """Return the name of the field."""
# Line 109  class Classification: Line 132  class Classification:
132          return self.fieldType          return self.fieldType
133    
134      def SetFieldType(self, type):      def SetFieldType(self, type):
135          self.fieldType = type          """Set the type of the field used by this classification.
136    
137            A ValueError is raised if the owning layer is not None and
138            'type' is different from the current field type.
139            """
140    
141            if type != self.fieldType:
142                if self.layer is not None:
143                    raise ValueError()
144                else:
145                    self.fieldType = type
146                    self.__SendNotification()
147    
148      def SetLayer(self, layer):      def SetLayer(self, layer):
149          """Set the owning Layer of this classification."""          """Set the owning Layer of this classification.
150    
151            A ValueError exception will be thrown either the field or
152            field type mismatch the information in the layer's table.
153            """
154    
155          if __debug__:          # prevent infinite recursion when calling SetClassification()
156              if layer is not None:          if self.__setLayerLock: return
                 assert(isinstance(layer, Thuban.Model.layer.Layer))  
157    
158          self.layer = layer          self.__setLayerLock = True
         self.SetField(self.GetField()) # XXX: this sync's the fieldType  
159    
160          self.__SendMessage(LAYER_LEGEND_CHANGED)          if layer is None:
161                if self.layer is not None:
162                    l = self.layer
163                    self.layer = None
164                    l.SetClassification(None)
165            else:
166                assert isinstance(layer, Thuban.Model.layer.Layer)
167    
168      def GetLayer(self):              old_layer = self.layer
         """Return the parent layer."""  
         return self.layer  
169    
170      def SetDefaultGroup(self, group):              self.layer = layer
         """Set the group to be used when a value can't be classified.  
171    
172             group -- group that the value maps to.              try:
173          """                  self.SetField(self.GetField()) # this sync's the fieldType
174                except ValueError:
175                    self.layer = old_layer
176                    self.__setLayerLock = False
177                    raise ValueError
178                else:
179                    self.layer.SetClassification(self)
180    
181          assert(isinstance(group, ClassGroupDefault))          self.__setLayerLock = False
182          self.AddGroup(group)  
183        def GetLayer(self):
184            """Return the parent layer."""
185            return self.layer
186    
     def GetDefaultGroup(self):  
         """Return the default group."""  
         return self.groups[0]  
187    
188      #      #
189      # these SetDefault* methods are really only provided for      # these SetDefault* methods are really only provided for
# Line 151  class Classification: Line 196  class Classification:
196    
197          fill -- a Color object.          fill -- a Color object.
198          """          """
199          assert(isinstance(fill, Color))          assert isinstance(fill, Color)
200          self.GetDefaultGroup().GetProperties().SetFill(fill)          self.GetDefaultGroup().GetProperties().SetFill(fill)
201          self.__SendMessage(LAYER_LEGEND_CHANGED)          self.__SendNotification()
202                    
203      def GetDefaultFill(self):      def GetDefaultFill(self):
204          """Return the default fill color."""          """Return the default fill color."""
# Line 164  class Classification: Line 209  class Classification:
209    
210          color -- a Color object.          color -- a Color object.
211          """          """
212          assert(isinstance(color, Color))          assert isinstance(color, Color)
213          self.GetDefaultGroup().GetProperties().SetLineColor(color)          self.GetDefaultGroup().GetProperties().SetLineColor(color)
214          self.__SendMessage(LAYER_LEGEND_CHANGED)          self.__SendNotification()
215                    
216      def GetDefaultLineColor(self):      def GetDefaultLineColor(self):
217          """Return the default line color."""          """Return the default line color."""
# Line 177  class Classification: Line 222  class Classification:
222    
223          lineWidth -- an integer > 0.          lineWidth -- an integer > 0.
224          """          """
225          assert(isinstance(lineWidth, IntType))          assert isinstance(lineWidth, IntType)
226          self.GetDefaultGroup().GetProperties().SetLineWidth(lineWidth)          self.GetDefaultGroup().GetProperties().SetLineWidth(lineWidth)
227          self.__SendMessage(LAYER_LEGEND_CHANGED)          self.__SendNotification()
228                    
229      def GetDefaultLineWidth(self):      def GetDefaultLineWidth(self):
230          """Return the default line width."""          """Return the default line width."""
231          return self.GetDefaultGroup().GetProperties().GetLineWidth()          return self.GetDefaultGroup().GetProperties().GetLineWidth()
232                    
233      def AddGroup(self, item):  
234          """Add a new ClassGroup item to the classification.      #
235        # The methods that manipulate self.__groups have to be kept in
236        # sync. We store the default group in index 0 to make it
237        # convienent to iterate over the classification's groups, but
238        # from the user's perspective the first (non-default) group is
239        # at index 0 and the DefaultGroup is a special entity.
240        #
241    
242        def SetDefaultGroup(self, group):
243            """Set the group to be used when a value can't be classified.
244    
245            group -- group that the value maps to.
246            """
247    
248            assert isinstance(group, ClassGroupDefault)
249            if len(self.__groups) > 0:
250                self.__groups[0] = group
251            else:
252                self.__groups.append(group)
253    
254        def GetDefaultGroup(self):
255            """Return the default group."""
256            return self.__groups[0]
257    
258        def AppendGroup(self, item):
259            """Append a new ClassGroup item to the classification.
260    
261          item -- this must be a valid ClassGroup object          item -- this must be a valid ClassGroup object
262          """          """
263    
264          assert(isinstance(item, ClassGroup))          self.InsertGroup(self.GetNumGroups(), item)
265    
266          if len(self.groups) > 0 and isinstance(item, ClassGroupDefault):      def InsertGroup(self, index, group):
267              self.groups[0] = item          
268              #self.SetDefaultGroup(item)          assert isinstance(group, ClassGroup)
269          else:  
270              self.groups.append(item)          self.__groups.insert(index + 1, group)
271    
272            self.__SendNotification()
273    
274        def RemoveGroup(self, index):
275            return self.__groups.pop(index + 1)
276    
277        def ReplaceGroup(self, index, group):
278            assert isinstance(group, ClassGroup)
279    
280          self.__SendMessage(LAYER_LEGEND_CHANGED)          self.__groups[index + 1] = group
281    
282      def GetGroup(self, value):          self.__SendNotification()
283    
284        def GetGroup(self, index):
285            return self.__groups[index + 1]
286    
287        def GetNumGroups(self):
288            """Return the number of non-default groups in the classification."""
289            return len(self.__groups) - 1
290    
291    
292        def FindGroup(self, value):
293          """Return the associated group, or the default group.          """Return the associated group, or the default group.
294    
295             Groups are checked in the order the were added to the          Groups are checked in the order the were added to the
296             Classification.          Classification.
297    
298             value -- the value to classify. If there is no mapping,          value -- the value to classify. If there is no mapping,
299                      or value is None, return the default properties                   the field is None or value is None,
300                     return the default properties
301          """          """
302    
303          if self.field is not None and value is not None:          if self.GetField() is not None and value is not None:
304    
305              for i in range(1, len(self.groups)):              for i in range(1, len(self.__groups)):
306                  group = self.groups[i]                  group = self.__groups[i]
307                  if group.Matches(value):                  if group.Matches(value):
308                      return group                      return group
309    
310          return self.GetDefaultGroup()          return self.GetDefaultGroup()
311    
312      def GetProperties(self, value):      def GetProperties(self, value):
313          """Return the properties associated with the given value."""          """Return the properties associated with the given value.
314          
315            Use this function rather than Classification.FindGroup().GetProperties()
316            since the returned group may be a ClassGroupMap which doesn't support
317            a call to GetProperties().
318            """
319    
320          group = self.GetGroup(value)          group = self.FindGroup(value)
321          if isinstance(group, ClassGroupMap):          if isinstance(group, ClassGroupMap):
322              return group.GetPropertiesFromValue(value)              return group.GetPropertiesFromValue(value)
323          else:          else:
# Line 233  class Classification: Line 327  class Classification:
327          items = []          items = []
328    
329          def build_color_item(text, color):          def build_color_item(text, color):
330              if color is Color.None:              if color is Color.Transparent:
331                  return ("%s: %s" % (text, _("None")), None)                  return ("%s: %s" % (text, _("None")), None)
332    
333              return ("%s: (%.3f, %.3f, %.3f)" %              return ("%s: (%.3f, %.3f, %.3f)" %
# Line 258  class Classification: Line 352  class Classification:
352              return (label, i)              return (label, i)
353    
354          for p in self:          for p in self:
355              if isinstance(p, ClassGroupDefault):              items.append(build_item(p, p.GetDisplayText()))
356                  items.append(build_item(self.GetDefaultGroup(), _("'DEFAULT'")))  
357              elif isinstance(p, ClassGroupSingleton):  #           if isinstance(p, ClassGroupDefault):
358                  items.append(build_item(p, str(p.GetValue())))  #               items.append(build_item(self.GetDefaultGroup(), _("'DEFAULT'")))
359              elif isinstance(p, ClassGroupRange):  #           elif isinstance(p, ClassGroupSingleton):
360                  items.append(build_item(p, "%s - %s" %  #               items.append(build_item(p, str(p.GetValue())))
361                                             (p.GetMin(), p.GetMax())))  #           elif isinstance(p, ClassGroupRange):
362    #               items.append(build_item(p, "%s - %s" %
363    #                                          (p.GetMin(), p.GetMax())))
364    
365          return (_("Classification"), items)          return (_("Classification"), items)
366    
# Line 328  class ClassGroupProperties: Line 424  class ClassGroupProperties:
424    
425          props -- a ClassGroupProperties object. The class is copied if          props -- a ClassGroupProperties object. The class is copied if
426                   prop is not None. Otherwise, a default set of properties                   prop is not None. Otherwise, a default set of properties
427                   is created.                   is created such that: line color = Color.Black, line width = 1,
428                     and fill color = Color.Transparent
429          """          """
430    
431          self.stroke = None          self.stroke = None
# Line 338  class ClassGroupProperties: Line 435  class ClassGroupProperties:
435          if props is not None:          if props is not None:
436              self.SetProperties(props)              self.SetProperties(props)
437          else:          else:
438              self.SetLineColor(Color.None)              self.SetLineColor(Color.Black)
439              self.SetLineWidth(1)              self.SetLineWidth(1)
440              self.SetFill(Color.None)              self.SetFill(Color.Transparent)
441    
442      def SetProperties(self, props):      def SetProperties(self, props):
443          """Set this class's properties to those in class props."""          """Set this class's properties to those in class props."""
444    
445          assert(isinstance(props, ClassGroupProperties))          assert isinstance(props, ClassGroupProperties)
446          self.SetLineColor(props.GetLineColor())          self.SetLineColor(props.GetLineColor())
447          self.SetLineWidth(props.GetLineWidth())          self.SetLineWidth(props.GetLineWidth())
448          self.SetFill(props.GetFill())          self.SetFill(props.GetFill())
# Line 360  class ClassGroupProperties: Line 457  class ClassGroupProperties:
457          color -- the color of the line. This must be a Color object.          color -- the color of the line. This must be a Color object.
458          """          """
459    
460          assert(isinstance(color, Color))          assert isinstance(color, Color)
461          self.stroke = color          self.stroke = color
462    
463      def GetLineWidth(self):      def GetLineWidth(self):
# Line 372  class ClassGroupProperties: Line 469  class ClassGroupProperties:
469    
470          lineWidth -- the new line width. This must be > 0.          lineWidth -- the new line width. This must be > 0.
471          """          """
472          assert(isinstance(lineWidth, IntType))          assert isinstance(lineWidth, IntType)
473          if (lineWidth < 1):          if (lineWidth < 1):
474              raise ValueError(_("lineWidth < 1"))              raise ValueError(_("lineWidth < 1"))
475    
# Line 388  class ClassGroupProperties: Line 485  class ClassGroupProperties:
485          fill -- the color of the fill. This must be a Color object.          fill -- the color of the fill. This must be a Color object.
486          """          """
487    
488          assert(isinstance(fill, Color))          assert isinstance(fill, Color)
489          self.fill = fill          self.fill = fill
490    
491        def __eq__(self, other):
492            """Return true if 'props' has the same attributes as this class"""
493    
494            return isinstance(other, ClassGroupProperties)   \
495                and self.stroke      == other.GetLineColor() \
496                and self.strokeWidth == other.GetLineWidth() \
497                and self.fill        == other.GetFill()
498    
499        def __ne__(self, other):
500            return not self.__eq__(other)
501    
502        def __copy__(self):
503            return ClassGroupProperties(self)
504    
505        def __deepcopy__(self):
506            return ClassGroupProperties(self)
507    
508  class ClassGroup:  class ClassGroup:
509      """A base class for all Groups within a Classification"""      """A base class for all Groups within a Classification"""
# Line 415  class ClassGroup: Line 528  class ClassGroup:
528          label -- a string representing the Group's label. This must          label -- a string representing the Group's label. This must
529                   not be None.                   not be None.
530          """          """
531          assert(isinstance(label, StringType))          assert isinstance(label, StringType)
532          self.label = label          self.label = label
533    
534        def GetDisplayText(self):
535            assert False, "GetDisplay must be overridden by subclass!"
536            return ""
537    
538      def Matches(self, value):      def Matches(self, value):
539          """Determines if this Group is associated with the given value.          """Determines if this Group is associated with the given value.
540    
541          Returns True or False. This needs to be implemented by all subclasses.          Returns False. This needs to be overridden by all subclasses.
542          """          """
543          pass          assert False, "GetMatches must be overridden by subclass!"
544            return False
545    
546      def GetProperties(self):      def GetProperties(self):
547          """Return the properties associated with the given value.          """Return the properties associated with the given value.
548    
549          This needs to be implemented by all subclasses.          Returns None. This needs to be overridden by all subclasses.
550          """          """
551          pass          assert False, "GetProperties must be overridden by subclass!"
552            return None
553    
554            
555  class ClassGroupSingleton(ClassGroup):  class ClassGroupSingleton(ClassGroup):
# Line 455  class ClassGroupSingleton(ClassGroup): Line 574  class ClassGroupSingleton(ClassGroup):
574          self.SetProperties(prop)          self.SetProperties(prop)
575    
576      def __copy__(self):      def __copy__(self):
577          return ClassGroupSingleton(self.value, self.prop, self.label)          return ClassGroupSingleton(self.GetValue(),
578                                       self.GetProperties(),
579                                       self.GetLabel())
580    
581        def __deepcopy__(self, memo):
582            return ClassGroupSingleton(copy.copy(self.GetValue()),
583                                       copy.copy(self.GetProperties()),
584                                       copy.copy(self.GetLabel()))
585    
586      def GetValue(self):      def GetValue(self):
587          """Return the associated value."""          """Return the associated value."""
# Line 485  class ClassGroupSingleton(ClassGroup): Line 611  class ClassGroupSingleton(ClassGroup):
611          """          """
612    
613          if prop is None: prop = ClassGroupProperties()          if prop is None: prop = ClassGroupProperties()
614          assert(isinstance(prop, ClassGroupProperties))          assert isinstance(prop, ClassGroupProperties)
615          self.prop = prop          self.prop = prop
616    
617        def GetDisplayText(self):
618            label = self.GetLabel()
619    
620            if label != "": return label
621    
622            return str(self.GetValue())
623    
624        def __eq__(self, other):
625            return isinstance(other, ClassGroupSingleton) \
626                and self.GetProperties() == other.GetProperties() \
627                and self.GetValue() == other.GetValue()
628    
629        def __ne__(self, other):
630            return not self.__eq__(other)
631    
632  class ClassGroupDefault(ClassGroupSingleton):  class ClassGroupDefault(ClassGroup):
633      """The default Group. When values do not match any other      """The default Group. When values do not match any other
634         Group within a Classification, the properties from this         Group within a Classification, the properties from this
635         class are used."""         class are used."""
# Line 503  class ClassGroupDefault(ClassGroupSingle Line 643  class ClassGroupDefault(ClassGroupSingle
643          label -- a label for this group.          label -- a label for this group.
644          """          """
645    
646          ClassGroupSingleton.__init__(self, 0, prop, label)          ClassGroup.__init__(self, label)
647            self.SetProperties(prop)
648    
649      def __copy__(self):      def __copy__(self):
650          return ClassGroupDefault(self.prop, self.label)          return ClassGroupDefault(self.GetProperties(), self.GetLabel())
651    
652        def __deepcopy__(self, memo):
653            return ClassGroupDefault(copy.copy(self.GetProperties()),
654                                     copy.copy(self.GetLabel()))
655    
656        def Matches(self, value):
657            return True
658    
659      def GetProperties(self):      def GetProperties(self):
660          """Return the Properties associated with this Group."""          """Return the Properties associated with this Group."""
661          return self.prop          return self.prop
662    
663        def SetProperties(self, prop):
664            """Set the properties associated with this Group.
665    
666            prop -- a ClassGroupProperties object. if prop is None,
667                    a default set of properties is created.
668            """
669    
670            if prop is None: prop = ClassGroupProperties()
671            assert isinstance(prop, ClassGroupProperties)
672            self.prop = prop
673    
674        def GetDisplayText(self):
675            label = self.GetLabel()
676    
677            if label != "": return label
678    
679            return _("DEFAULT")
680    
681        def __eq__(self, other):
682            return isinstance(other, ClassGroupDefault) \
683                and self.GetProperties() == other.GetProperties()
684    
685        def __ne__(self, other):
686            return not self.__eq__(other)
687    
688  class ClassGroupRange(ClassGroup):  class ClassGroupRange(ClassGroup):
689      """A Group that represents a range of values that map to the same      """A Group that represents a range of values that map to the same
690         set of properties."""         set of properties."""
# Line 540  class ClassGroupRange(ClassGroup): Line 713  class ClassGroupRange(ClassGroup):
713          self.SetProperties(prop)          self.SetProperties(prop)
714    
715      def __copy__(self):      def __copy__(self):
716          return ClassGroupRange(self.min, self.max, self.prop, self.label)          return ClassGroupRange(self.GetMin(),
717                                   self.GetMax(),
718                                   self.GetProperties(),
719                                   self.GetLabel())
720    
721        def __deepcopy__(self, memo):
722            return ClassGroupRange(copy.copy(self.GetMin()),
723                                   copy.copy(self.GetMax()),
724                                   copy.copy(self.GetProperties()),
725                                   copy.copy(self.GetLabel()))
726    
727      def GetMin(self):      def GetMin(self):
728          """Return the range's minimum value."""          """Return the range's minimum value."""
# Line 605  class ClassGroupRange(ClassGroup): Line 787  class ClassGroupRange(ClassGroup):
787                  a default set of properties is created.                  a default set of properties is created.
788          """          """
789          if prop is None: prop = ClassGroupProperties()          if prop is None: prop = ClassGroupProperties()
790          assert(isinstance(prop, ClassGroupProperties))          assert isinstance(prop, ClassGroupProperties)
791          self.prop = prop          self.prop = prop
792    
793        def GetDisplayText(self):
794            label = self.GetLabel()
795    
796            if label != "": return label
797    
798            return _("%s - %s") % (self.GetMin(), self.GetMax())
799    
800        def __eq__(self, other):
801            return isinstance(other, ClassGroupRange) \
802                and self.GetProperties() == other.GetProperties() \
803                and self.GetRange() == other.GetRange()
804    
805        def __ne__(self, other):
806            return not self.__eq__(other)
807    
808  class ClassGroupMap(ClassGroup):  class ClassGroupMap(ClassGroup):
809      """Currently, this class is not used."""      """Currently, this class is not used."""
810    
# Line 631  class ClassGroupMap(ClassGroup): Line 828  class ClassGroupMap(ClassGroup):
828      def GetPropertiesFromValue(self, value):      def GetPropertiesFromValue(self, value):
829          pass          pass
830    
831        def GetDisplayText(self):
832            return "Map: " + self.map_type
833    
834      #      #
835      # built-in mappings      # built-in mappings
836      #      #
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