/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/classification.py
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revision 453 by bh, Tue Mar 4 11:31:39 2003 UTC revision 1909 by bh, Fri Oct 31 18:16:34 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  import copy, operator, types
 from __future__ import nested_scopes  
   
 from types import *  
   
 from messages import LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \  
      LAYER_VISIBILITY_CHANGED  
24    
25  from Thuban import _  from Thuban import _
 from Thuban.Model.color import Color  
26    
27  import Thuban.Model.layer  from messages import \
28        LAYER_PROJECTION_CHANGED, \
29        LAYER_LEGEND_CHANGED, \
30        LAYER_VISIBILITY_CHANGED,\
31        CLASS_CHANGED
32    
33    from Thuban.Model.color import Color, Transparent, Black
34    from Thuban.Model.range import Range
35    
36  # constants  import Thuban.Model.layer
 RANGE_MIN  = 0  
 RANGE_MAX  = 1  
 RANGE_DATA = 2  
   
 class Classification:  
37    
38      def __init__(self, layer = None, field = None):  from Thuban.Lib.connector import Publisher
         """Initialize a classification.  
39    
40             layer -- the layer object who owns this classification  class Classification(Publisher):
41        """Encapsulates the classification of layer.
42        
43        The Classification divides some kind of data into Groups which
44        are associated with properties. Later the properties can be
45        retrieved by matching data values to the appropriate group.
46        """
47    
48             field -- the name of the data table field that      def __init__(self):
49                      is to be used to classify layer properties          """Initialize a classification."""
         """  
50    
51          self.layer = None # stop message sending          self.__groups = []
52    
53          self.SetDefaultGroup(ClassGroupDefault())          self.SetDefaultGroup(ClassGroupDefault())
         self.SetField(field)  
   
         self.layer = layer  
         self.points = []  
         self.ranges = []  
         self.maps   = []  
54    
55      def __iter__(self):      def __iter__(self):
56          return ClassIterator(self.DefaultGroup,          return ClassIterator(self.__groups)
                              self.points,  
                              self.ranges,  
                              self.maps)  
   
     def __SendMessage(self, message):  
         if self.layer is not None:  
             self.layer.changed(message, self.layer)  
       
     def SetField(self, field):  
         """Set the name of the data table field to use.  
           
            field -- if None then all values map to the default data  
         """  
57    
58          if field == "":      def __deepcopy__(self, memo):
59              field = None          clazz = Classification()
60    
61          self.field = field          clazz.__groups[0] = copy.deepcopy(self.__groups[0])
         self.__SendMessage(LAYER_LEGEND_CHANGED)  
62    
63      def GetField(self):          for i in range(1, len(self.__groups)):
64          return self.field              clazz.__groups.append(copy.deepcopy(self.__groups[i]))
65    
66      def SetLayer(self, layer):          return clazz
         assert(isinstance(layer, Thuban.Model.layer.Layer))  
         self.layer = layer  
         self.__SendMessage(LAYER_LEGEND_CHANGED)  
   
     def GetLayer(self):  
         return layer.self  
   
     def SetDefaultGroup(self, group):  
         """Set the group to be used when a value can't be classified.  
   
            group -- group that the value maps to. See class description.  
         """  
   
         assert(isinstance(group, ClassGroupDefault))  
         self.DefaultGroup = group  
   
     def GetDefaultGroup(self):  
         return self.DefaultGroup  
67    
68        def __SendNotification(self):
69            """Notify the layer that this class has changed."""
70            self.issue(CLASS_CHANGED)
71        
72      #      #
73      # these SetDefault* methods are really only provided for      # these SetDefault* methods are really only provided for
74      # some backward compatibility. they should be considered      # some backward compatibility. they should be considered
# Line 112  class Classification: Line 76  class Classification:
76      #      #
77    
78      def SetDefaultFill(self, fill):      def SetDefaultFill(self, fill):
79          assert(isinstance(fill, Color))          """Set the default fill color.
80          self.DefaultGroup.GetProperties().SetFill(fill)  
81          self.__SendMessage(LAYER_LEGEND_CHANGED)          fill -- a Color object.
82            """
83            self.GetDefaultGroup().GetProperties().SetFill(fill)
84            self.__SendNotification()
85                    
86      def GetDefaultFill(self):      def GetDefaultFill(self):
87          return self.DefaultGroup.GetProperties().GetFill()          """Return the default fill color."""
88            return self.GetDefaultGroup().GetProperties().GetFill()
89                    
90      def SetDefaultStroke(self, stroke):      def SetDefaultLineColor(self, color):
91          assert(isinstance(stroke, Color))          """Set the default line color.
92          self.DefaultGroup.GetProperties().SetStroke(stroke)  
93          self.__SendMessage(LAYER_LEGEND_CHANGED)          color -- a Color object.
94            """
95            self.GetDefaultGroup().GetProperties().SetLineColor(color)
96            self.__SendNotification()
97                    
98      def GetDefaultStroke(self):      def GetDefaultLineColor(self):
99          return self.DefaultGroup.GetProperties().GetStroke()          """Return the default line color."""
100            return self.GetDefaultGroup().GetProperties().GetLineColor()
101                    
102      def SetDefaultStrokeWidth(self, strokeWidth):      def SetDefaultLineWidth(self, lineWidth):
103          assert(isinstance(strokeWidth, IntType))          """Set the default line width.
104          self.DefaultGroup.GetProperties().SetStrokeWidth(strokeWidth)  
105          self.__SendMessage(LAYER_LEGEND_CHANGED)          lineWidth -- an integer > 0.
106            """
107            assert isinstance(lineWidth, types.IntType)
108            self.GetDefaultGroup().GetProperties().SetLineWidth(lineWidth)
109            self.__SendNotification()
110                    
111      def GetDefaultStrokeWidth(self):      def GetDefaultLineWidth(self):
112          return self.DefaultGroup.GetProperties().GetStrokeWidth()          """Return the default line width."""
113            return self.GetDefaultGroup().GetProperties().GetLineWidth()
114                    
     def AddGroup(self, item):  
         assert(isinstance(item, ClassGroup))  
115    
116          if isinstance(item, ClassGroupDefault):      #
117              self.SetDefaultGroup(item)      # The methods that manipulate self.__groups have to be kept in
118          elif isinstance(item, ClassGroupSingleton):      # sync. We store the default group in index 0 to make it
119              self.points.append(item)      # convienent to iterate over the classification's groups, but
120          elif isinstance(item, ClassGroupRange):      # from the user's perspective the first (non-default) group is
121              self.ranges.append(item)      # at index 0 and the DefaultGroup is a special entity.
122          elif isinstance(item, ClassGroupMap):      #
123              self.maps.append(item)  
124        def SetDefaultGroup(self, group):
125            """Set the group to be used when a value can't be classified.
126    
127            group -- group that the value maps to.
128            """
129            assert isinstance(group, ClassGroupDefault)
130            if len(self.__groups) > 0:
131                self.__groups[0] = group
132          else:          else:
133              raise ValueError(_("Unrecognized ClassGroup"))              self.__groups.append(group)
134            self.__SendNotification()
135    
136        def GetDefaultGroup(self):
137            """Return the default group."""
138            return self.__groups[0]
139    
140          self.__SendMessage(LAYER_LEGEND_CHANGED)      def AppendGroup(self, item):
141            """Append a new ClassGroup item to the classification.
142    
143      def GetGroup(self, value):          item -- this must be a valid ClassGroup object
144          """Return the associated data, or the default data.          """
145    
146            self.InsertGroup(self.GetNumGroups(), item)
147    
148        def InsertGroup(self, index, group):
149            assert isinstance(group, ClassGroup)
150            self.__groups.insert(index + 1, group)
151            self.__SendNotification()
152    
153        def RemoveGroup(self, index):
154            """Remove the classification group with the given index"""
155            self.__groups.pop(index + 1)
156            self.__SendNotification()
157    
158        def ReplaceGroup(self, index, group):
159            assert isinstance(group, ClassGroup)
160            self.__groups[index + 1] = group
161            self.__SendNotification()
162    
163        def GetGroup(self, index):
164            return self.__groups[index + 1]
165    
166        def GetNumGroups(self):
167            """Return the number of non-default groups in the classification."""
168            return len(self.__groups) - 1
169    
170        def FindGroup(self, value):
171            """Return the associated group, or the default group.
172    
173            Groups are checked in the order the were added to the
174            Classification.
175    
176            value -- the value to classify. If there is no mapping,
177                     the field is None or value is None,
178                     return the default properties
179            """
180    
181             The following search technique is used:          if value is not None:
182                 (1) if the field is None, return the default data              for i in range(1, len(self.__groups)):
183                 (2) check if the value exists as a single value                  group = self.__groups[i]
184                 (3) check if the value falls within a range. Ranges                  if group.Matches(value):
185                     are checked in the order they were added to                      return group
                    the classification.  
   
            value -- the value to classify. If there is no mapping,  
                     or value is None, return the default properties  
         """  
   
         if self.field is not None and value is not None:  
   
             for p in self:  
                 if p.Matches(value):  
                     return p  
 #           #  
 #           # check the discrete values  
 #           #  
 #           if self.points.has_key(value):  
 #               return self.points[value]  
 #           #for p in self.points:  
 #               #if p.Value  
   
 #           #  
 #           # check the ranges  
 #           #  
 #           for p in self.ranges:  
 #               if p.InRange(value):  
 #                   return p  
   
 #           #  
 #           # check the maps  
 #           #  
 #           for p in self.maps:  
 #               try:  
 #                   return p.Map(value)  
 #               except: pass  
186    
187          return self.DefaultGroup          return self.GetDefaultGroup()
188    
189      def GetProperties(self, value):      def GetProperties(self, value):
190          return self.GetGroup(value).GetProperties()          """Return the properties associated with the given value.
191          
192            Use this function rather than Classification.FindGroup().GetProperties()
193            since the returned group may be a ClassGroupMap which doesn't support
194            a call to GetProperties().
195            """
196    
197            group = self.FindGroup(value)
198            if isinstance(group, ClassGroupMap):
199                return group.GetPropertiesFromValue(value)
200            else:
201                return group.GetProperties()
202    
203      def TreeInfo(self):      def TreeInfo(self):
204          items = []          items = []
205    
206          def build_color_item(text, color):          def build_color_item(text, color):
207              if color is Color.None:              if color is Transparent:
208                  return ("%s: %s" % (text, _("None")), None)                  return ("%s: %s" % (text, _("None")), None)
209    
210              return ("%s: (%.3f, %.3f, %.3f)" %              return ("%s: (%.3f, %.3f, %.3f)" %
# Line 218  class Classification: Line 220  class Classification:
220    
221              props = group.GetProperties()              props = group.GetProperties()
222              i = []              i = []
223              v = props.GetStroke()              v = props.GetLineColor()
224              i.append(build_color_item(_("Stroke"), v))              i.append(build_color_item(_("Line Color"), v))
225              v = props.GetStrokeWidth()              v = props.GetLineWidth()
226              i.append(_("Stroke Width: %s") % v)              i.append(_("Line Width: %s") % v)
227              v = props.GetFill()              v = props.GetFill()
228              i.append(build_color_item(_("Fill"), v))              i.append(build_color_item(_("Fill"), v))
229              return (label, i)              return (label, i)
230    
231          for p in self:          for p in self:
232              if isinstance(p, ClassGroupDefault):              items.append(build_item(p, p.GetDisplayText()))
                 items.append(build_item(self.DefaultGroup, _("'DEFAULT'")))  
             elif isinstance(p, ClassGroupSingleton):  
                 items.append(build_item(p, str(p.GetValue())))  
             elif isinstance(p, ClassGroupRange):  
                 items.append(build_item(p, "%s - %s" %  
                                            (p.GetMin(), p.GetMax())))  
   
 #       for p in self.points.values():  
 #           items.append(build_item(p, str(p.GetValue())))  
   
 #       for p in self.ranges:  
 #           items.append(build_item(p, "%s - %s" % (p.GetMin(), p.GetMax())))  
233    
234          return (_("Classification"), items)          return (_("Classification"), items)
235    
236  class ClassIterator:  class ClassIterator:
237        """Allows the Groups in a Classifcation to be interated over.
238    
239      def __init__(self, default, points, ranges, maps):      The items are returned in the following order:
240          self.data = [default, points, ranges, maps]          default data, singletons, ranges, maps
241          self.data_iter = iter(self.data)      """
242          self.iter = None  
243        def __init__(self, data): #default, points, ranges, maps):
244            """Constructor.
245    
246            default -- the default group
247    
248            points -- a list of singleton groups
249    
250            ranges -- a list of range groups
251    
252            maps -- a list of map groups
253            """
254    
255            self.data = data
256            self.data_index = 0
257    
258      def __iter__(self):      def __iter__(self):
259          return self          return self
260    
261      def next(self):      def next(self):
262          if self.iter is None:          """Return the next item."""
263              try:  
264                  self.data_item = self.data_iter.next()          if self.data_index >= len(self.data):
265                  self.iter = iter(self.data_item)              raise StopIteration
266              except TypeError:          else:
267                  return self.data_item              d = self.data[self.data_index]
268                self.data_index += 1
269          try:              return d
270              return self.iter.next()          
         except StopIteration:  
             self.iter = None  
             return self.next()  
         
271  class ClassGroupProperties:  class ClassGroupProperties:
272        """Represents the properties of a single Classification Group.
273      
274        These are used when rendering a layer."""
275    
276        def __init__(self, props = None):
277            """Constructor.
278    
279      def __init__(self, prop = None):          props -- a ClassGroupProperties object. The class is copied if
280                     prop is not None. Otherwise, a default set of properties
281                     is created such that: line color = Black, line width = 1,
282                     and fill color = Transparent
283            """
284    
285          if prop is not None:          if props is not None:
286              self.SetStroke(prop.GetStroke())              self.SetProperties(props)
             self.SetStrokeWidth(prop.GetStrokeWidth())  
             self.SetFill(prop.GetFill())  
287          else:          else:
288              self.SetStroke(Color.None)              self.SetLineColor(Black)
289              self.SetStrokeWidth(1)              self.SetLineWidth(1)
290              self.SetFill(Color.None)              self.SetFill(Transparent)
291    
292      def GetStroke(self):      def SetProperties(self, props):
293          return self.stroke          """Set this class's properties to those in class props."""
294    
295      def SetStroke(self, stroke):          assert isinstance(props, ClassGroupProperties)
296          assert(isinstance(stroke, Color))          self.SetLineColor(props.GetLineColor())
297          self.stroke = stroke          self.SetLineWidth(props.GetLineWidth())
298            self.SetFill(props.GetFill())
299      def GetStrokeWidth(self):          
300          return self.stroke_width      def GetLineColor(self):
301            """Return the line color as a Color object."""
302      def SetStrokeWidth(self, stroke_width):          return self.__stroke
         assert(isinstance(stroke_width, IntType))  
         if (stroke_width < 1):  
             raise ValueError(_("stroke_width < 1"))  
303    
304          self.stroke_width = stroke_width      def SetLineColor(self, color):
305            """Set the line color.
306    
307            color -- the color of the line. This must be a Color object.
308            """
309    
310            self.__stroke = color
311    
312        def GetLineWidth(self):
313            """Return the line width."""
314            return self.__strokeWidth
315    
316        def SetLineWidth(self, lineWidth):
317            """Set the line width.
318    
319            lineWidth -- the new line width. This must be > 0.
320            """
321            assert isinstance(lineWidth, types.IntType)
322            if (lineWidth < 1):
323                raise ValueError(_("lineWidth < 1"))
324    
325            self.__strokeWidth = lineWidth
326    
327      def GetFill(self):      def GetFill(self):
328          return self.fill          """Return the fill color as a Color object."""
329            return self.__fill
330    
331      def SetFill(self, fill):      def SetFill(self, fill):
332          assert(isinstance(fill, Color))          """Set the fill color.
333          self.fill = fill  
334            fill -- the color of the fill. This must be a Color object.
335            """
336    
337            self.__fill = fill
338    
339        def __eq__(self, other):
340            """Return true if 'props' has the same attributes as this class"""
341    
342            #
343            # using 'is' over '==' results in a huge performance gain
344            # in the renderer
345            #
346            return isinstance(other, ClassGroupProperties)   \
347                and (self.__stroke is other.__stroke or      \
348                     self.__stroke == other.__stroke)        \
349                and (self.__fill is other.__fill or          \
350                     self.__fill == other.__fill)            \
351                and self.__strokeWidth == other.__strokeWidth
352    
353        def __ne__(self, other):
354            return not self.__eq__(other)
355    
356        def __copy__(self):
357            return ClassGroupProperties(self)
358    
359        def __deepcopy__(self):
360            return ClassGroupProperties(self)
361    
362        def __repr__(self):
363            return repr((self.__stroke, self.__strokeWidth, self.__fill))
364    
365  class ClassGroup:  class ClassGroup:
366        """A base class for all Groups within a Classification"""
367    
368      def __init__(self, label = ""):      def __init__(self, label = "", props = None, group = None):
369          self.label = label          """Constructor.
370    
371            label -- A string representing the Group's label
372            """
373    
374            if group is not None:
375                self.SetLabel(copy.copy(group.GetLabel()))
376                self.SetProperties(copy.copy(group.GetProperties()))
377                self.SetVisible(group.IsVisible())
378            else:
379                self.SetLabel(label)
380                self.SetProperties(props)
381                self.SetVisible(True)
382    
383      def GetLabel(self):      def GetLabel(self):
384            """Return the Group's label."""
385          return self.label          return self.label
386    
387      def SetLabel(self, label):      def SetLabel(self, label):
388            """Set the Group's label.
389    
390            label -- a string representing the Group's label. This must
391                     not be None.
392            """
393            assert isinstance(label, types.StringTypes)
394          self.label = label          self.label = label
395    
396        def GetDisplayText(self):
397            assert False, "GetDisplay must be overridden by subclass!"
398            return ""
399    
400      def Matches(self, value):      def Matches(self, value):
401          """This needs to be implemented by all subclasses."""          """Determines if this Group is associated with the given value.
         pass  
402    
403      def GetProperties(self, value):          Returns False. This needs to be overridden by all subclasses.
404          """This needs to be implemented by all subclasses."""          """
405          pass          assert False, "GetMatches must be overridden by subclass!"
406            return False
407    
408        def GetProperties(self):
409            """Return the properties associated with the given value."""
410    
411            return self.prop
412    
413        def SetProperties(self, prop):
414            """Set the properties associated with this Group.
415    
416            prop -- a ClassGroupProperties object. if prop is None,
417                    a default set of properties is created.
418            """
419    
420            if prop is None: prop = ClassGroupProperties()
421            assert isinstance(prop, ClassGroupProperties)
422            self.prop = prop
423    
424        def IsVisible(self):
425            return self.visible
426    
427        def SetVisible(self, visible):
428            self.visible = visible
429    
430        def __eq__(self, other):
431            return isinstance(other, ClassGroup) \
432                and self.label == other.label \
433                and self.GetProperties() == other.GetProperties()
434    
435        def __ne__(self, other):
436            return not self.__eq__(other)
437    
438        def __repr__(self):
439            return repr(self.label) + ", " + repr(self.GetProperties())
440            
441  class ClassGroupSingleton(ClassGroup):  class ClassGroupSingleton(ClassGroup):
442        """A Group that is associated with a single value."""
443    
444      def __init__(self, value = 0, prop = None, label = ""):      def __init__(self, value = 0, props = None, label = "", group = None):
445          ClassGroup.__init__(self, label)          """Constructor.
446    
447            value -- the associated value.
448    
449            prop -- a ClassGroupProperites object. If prop is None a default
450                     set of properties is created.
451    
452            label -- a label for this group.
453            """
454            ClassGroup.__init__(self, label, props, group)
455    
456          self.SetValue(value)          self.SetValue(value)
         self.SetProperties(prop)  
457    
458      def __copy__(self):      def __copy__(self):
459          return ClassGroupSingleton(self.value, self.prop, self.label)          return ClassGroupSingleton(self.GetValue(),
460                                       self.GetProperties(),
461                                       self.GetLabel())
462    
463        def __deepcopy__(self, memo):
464            return ClassGroupSingleton(self.GetValue(), group = self)
465    
466      def GetValue(self):      def GetValue(self):
467          return self.value          """Return the associated value."""
468            return self.__value
469    
470      def SetValue(self, value):      def SetValue(self, value):
471          self.value = value          """Associate this Group with the given value."""
472            self.__value = value
473    
474      def Matches(self, value):      def Matches(self, value):
475          return self.value == value          """Determine if the given value matches the associated Group value."""
476    
477      def GetProperties(self, value = None):          """Returns True if the value matches, False otherwise."""
         if value is None: return self.prop  
478    
479          if self.Matches(value):          return self.__value == value
             return self.prop  
         else:  
             return None  
480    
481      def SetProperties(self, prop):      def GetDisplayText(self):
482          if prop is None: prop = ClassGroupProperties()          label = self.GetLabel()
483          assert(isinstance(prop, ClassGroupProperties))  
484          self.prop = prop          if label != "": return label
485    
486            return str(self.GetValue())
487    
488        def __eq__(self, other):
489            return ClassGroup.__eq__(self, other) \
490                and isinstance(other, ClassGroupSingleton) \
491                and self.__value == other.__value
492    
493        def __repr__(self):
494            return "(" + repr(self.__value) + ", " + ClassGroup.__repr__(self) + ")"
495    
496    class ClassGroupDefault(ClassGroup):
497        """The default Group. When values do not match any other
498           Group within a Classification, the properties from this
499           class are used."""
500    
501        def __init__(self, props = None, label = "", group = None):
502            """Constructor.
503    
504  class ClassGroupDefault(ClassGroupSingleton):          prop -- a ClassGroupProperites object. If prop is None a default
505      def __init__(self, prop = None, label = ""):                   set of properties is created.
506          ClassGroupSingleton.__init__(self, 0, prop, label)  
507            label -- a label for this group.
508            """
509    
510            ClassGroup.__init__(self, label, props, group)
511    
512      def __copy__(self):      def __copy__(self):
513          return ClassGroupDefault(self.prop, self.label)          return ClassGroupDefault(self.GetProperties(), self.GetLabel())
514    
515      def GetProperties(self, value = None):      def __deepcopy__(self, memo):
516          return self.prop          return ClassGroupDefault(label = self.GetLabel(), group = self)
517    
518        def Matches(self, value):
519            return True
520    
521        def GetDisplayText(self):
522            label = self.GetLabel()
523    
524            if label != "": return label
525    
526            return _("DEFAULT")
527    
528        def __eq__(self, other):
529            return ClassGroup.__eq__(self, other) \
530                and isinstance(other, ClassGroupDefault) \
531                and self.GetProperties() == other.GetProperties()
532    
533        def __repr__(self):
534            return "(" + ClassGroup.__repr__(self) + ")"
535    
536  class ClassGroupRange(ClassGroup):  class ClassGroupRange(ClassGroup):
537        """A Group that represents a range of values that map to the same
538           set of properties."""
539    
540      def __init__(self, min = 0, max = 1, prop = None, label = ""):      def __init__(self, _range = (0,1), props = None, label = "", group=None):
541          ClassGroup.__init__(self, label)          """Constructor.
542    
543            The minumum value must be strictly less than the maximum.
544    
545          self.SetRange(min, max)          _range -- either a tuple (min, max) where min < max or
546          self.SetProperties(prop)                    a Range object
547    
548            prop -- a ClassGroupProperites object. If prop is None a default
549                     set of properties is created.
550    
551            label -- a label for this group.
552            """
553    
554            ClassGroup.__init__(self, label, props, group)
555            self.SetRange(_range)
556    
557      def __copy__(self):      def __copy__(self):
558          return ClassGroupRange(self.min, self.max, self.prop, self.label)          return ClassGroupRange(self.__range,
559                                   props = self.GetProperties(),
560                                   label = self.GetLabel())
561    
562        def __deepcopy__(self, memo):
563            return ClassGroupRange(copy.copy(self.__range),
564                                   group = self)
565    
566      def GetMin(self):      def GetMin(self):
567          return self.min          """Return the range's minimum value."""
568            return self.__range.GetRange()[1]
569    
570      def SetMin(self, min):      def SetMin(self, min):
571          self.SetRange(min, self.max)          """Set the range's minimum value.
572        
573            min -- the new minimum. Note that this must be less than the current
574                   maximum value. Use SetRange() to change both min and max values.
575            """
576        
577            self.SetRange((min, self.__range.GetRange()[2]))
578    
579      def GetMax(self):      def GetMax(self):
580          return self.max          """Return the range's maximum value."""
581            return self.__range.GetRange()[2]
582    
583      def SetMax(self, max):      def SetMax(self, max):
584          self.SetRange(self.min, max)          """Set the range's maximum value.
585        
586            max -- the new maximum. Note that this must be greater than the current
587                   minimum value. Use SetRange() to change both min and max values.
588            """
589            self.SetRange((self.__range.GetRange()[1], max))
590    
591      def SetRange(self, min, max):      def SetRange(self, _range):
592          if min >= max:          """Set a new range.
593              raise ValueError(_("ClassGroupRange: %i(min) >= %i(max)!") %  
594                               (min, max))          _range -- Either a tuple (min, max) where min < max or
595          self.min = min                    a Range object.
596          self.max = max  
597            Raises ValueError on error.
598            """
599    
600            if isinstance(_range, Range):
601                self.__range = _range
602            elif isinstance(_range, types.TupleType) and len(_range) == 2:
603                self.__range = Range(("[", _range[0], _range[1], "["))
604            else:
605                raise ValueError()
606    
607      def GetRange(self):      def GetRange(self):
608          return (self.min, self.max)          """Return the range as a string"""
609            return self.__range.string(self.__range.GetRange())
610    
611      def Matches(self, value):      def Matches(self, value):
612          return self.min <= value < self.max          """Determine if the given value lies with the current range.
613    
614      def GetProperties(self, value = None):          The following check is used: min <= value < max.
615          if value is None: return self.prop          """
616    
617          if self.Matches(value):          return operator.contains(self.__range, value)
             return self.prop  
         else:  
             return None  
618    
619      def SetProperties(self, prop):      def GetDisplayText(self):
620          if prop is None: prop = ClassGroupProperties()          label = self.GetLabel()
621          assert(isinstance(prop, ClassGroupProperties))  
622          self.prop = prop          if label != "": return label
623    
624            return self.__range.string(self.__range.GetRange())
625    
626        def __eq__(self, other):
627            return ClassGroup.__eq__(self, other) \
628                and isinstance(other, ClassGroupRange) \
629                and self.__range == other.__range
630    
631        def __repr__(self):
632            return "(" + str(self.__range) + ClassGroup.__repr__(self) + ")"
633    
634  class ClassGroupMap(ClassGroup):  class ClassGroupMap(ClassGroup):
635        """Currently, this class is not used."""
636    
637      FUNC_ID = "id"      FUNC_ID = "id"
638    
639      def __init__(self, map_type = FUNC_ID, func = None, prop = None, label=""):      def __init__(self, map_type = FUNC_ID, func = None, prop = None, label=""):
640          ClassGroup.__init__(self, prop)          ClassGroup.__init__(self, label)
641    
642          self.map_type = map_type          self.map_type = map_type
643          self.func = func          self.func = func
# Line 434  class ClassGroupMap(ClassGroup): Line 648  class ClassGroupMap(ClassGroup):
648      def Map(self, value):      def Map(self, value):
649          return self.func(value)          return self.func(value)
650    
651        def GetProperties(self):
652            return None
653    
654        def GetPropertiesFromValue(self, value):
655            pass
656    
657        def GetDisplayText(self):
658            return "Map: " + self.map_type
659    
660      #      #
661      # built-in mappings      # built-in mappings
662      #      #
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