/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/classification.py
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revision 1912 by bh, Mon Nov 3 13:55:41 2003 UTC revision 2688 by frank, Fri Jun 30 12:27:20 2006 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2003 by Intevation GmbH  # Copyright (c) 2001, 2003, 2005, 2006 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]>
4    # Jan-Oliver Wagner <[email protected]> (2005)
5    # Frank Koormann <[email protected]> (2006)
6  #  #
7  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
8  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 21  on the mapping algorithm. Line 23  on the mapping algorithm.
23  """  """
24        
25  import copy, operator, types  import copy, operator, types
26    import re
27    
28  from Thuban import _  from Thuban import _
29    
# Line 108  class Classification(Publisher): Line 111  class Classification(Publisher):
111    
112              is true.              is true.
113    
114              'pattern'
115                
116                The tuple contains the compiled regular expression object and
117                the original group object.
118    
119          The compiled classification is bound to          The compiled classification is bound to
120          self._compile_classification.          self._compile_classification.
121          """          """
# Line 117  class Classification(Publisher): Line 125  class Classification(Publisher):
125                  if not compiled or compiled[-1][0] != "singletons":                  if not compiled or compiled[-1][0] != "singletons":
126                      compiled.append(("singletons", {}))                      compiled.append(("singletons", {}))
127                  compiled[-1][1].setdefault(group.GetValue(), group)                  compiled[-1][1].setdefault(group.GetValue(), group)
128                elif isinstance(group, ClassGroupPattern):
129                    pattern = re.compile(group.GetPattern())
130                    compiled.append(("pattern", (pattern, group)))
131              elif isinstance(group, ClassGroupRange):              elif isinstance(group, ClassGroupRange):
132                  left, min, max, right = group.GetRangeTuple()                  left, min, max, right = group.GetRangeTuple()
133                  if left == "[":                  if left == "[":
# Line 266  class Classification(Publisher): Line 277  class Classification(Publisher):
277                      lfunc, min, max, rfunc, g = params                      lfunc, min, max, rfunc, g = params
278                      if lfunc(min, value) and rfunc(max, value):                      if lfunc(min, value) and rfunc(max, value):
279                          return g                          return g
280                    elif typ == "pattern":
281                        # TODO: make pattern more robust. The following chrashes
282                        # if accidently be applied on non-string columns.
283                        # Usually the UI prevents this.
284                        p, g = params
285                        if p.match(value):
286                            return g
287    
288          return self.GetDefaultGroup()          return self.GetDefaultGroup()
289    
# Line 307  class Classification(Publisher): Line 325  class Classification(Publisher):
325              i.append(build_color_item(_("Line Color"), v))              i.append(build_color_item(_("Line Color"), v))
326              v = props.GetLineWidth()              v = props.GetLineWidth()
327              i.append(_("Line Width: %s") % v)              i.append(_("Line Width: %s") % v)
328    
329                # Note: Size is owned by all properties, so
330                # a size will also appear where it does not
331                # make sense like for lines and polygons.
332                v = props.GetSize()
333                i.append(_("Size: %s") % v)
334    
335              v = props.GetFill()              v = props.GetFill()
336              i.append(build_color_item(_("Fill"), v))              i.append(build_color_item(_("Fill"), v))
337              return (label, i)              return (label, i)
# Line 315  class Classification(Publisher): Line 340  class Classification(Publisher):
340              items.append(build_item(p, p.GetDisplayText()))              items.append(build_item(p, p.GetDisplayText()))
341    
342          return (_("Classification"), items)          return (_("Classification"), items)
343    
344  class ClassIterator:  class ClassIterator:
345      """Allows the Groups in a Classifcation to be interated over.      """Allows the Groups in a Classifcation to be interated over.
346    
# Line 327  class ClassIterator: Line 352  class ClassIterator:
352          """Constructor.          """Constructor.
353    
354          default -- the default group          default -- the default group
355    
356          points -- a list of singleton groups          points -- a list of singleton groups
357    
358          ranges -- a list of range groups          ranges -- a list of range groups
359    
360          maps -- a list of map groups          maps -- a list of map groups
361          """          """
362    
# Line 350  class ClassIterator: Line 375  class ClassIterator:
375              d = self.data[self.data_index]              d = self.data[self.data_index]
376              self.data_index += 1              self.data_index += 1
377              return d              return d
378            
379  class ClassGroupProperties:  class ClassGroupProperties:
380      """Represents the properties of a single Classification Group.      """Represents the properties of a single Classification Group.
381      
382      These are used when rendering a layer."""      These are used when rendering a layer."""
383    
384        # TODO: Actually, size is only relevant for point objects.
385        # Eventually it should be spearated, e.g. when introducing symbols.
386    
387      def __init__(self, props = None):      def __init__(self, props = None):
388          """Constructor.          """Constructor.
389    
390          props -- a ClassGroupProperties object. The class is copied if          props -- a ClassGroupProperties object. The class is copied if
391                   prop is not None. Otherwise, a default set of properties                   prop is not None. Otherwise, a default set of properties
392                   is created such that: line color = Black, line width = 1,                   is created such that: line color = Black, line width = 1,
393                   and fill color = Transparent                   size = 5 and fill color = Transparent
394          """          """
395    
396          if props is not None:          if props is not None:
# Line 370  class ClassGroupProperties: Line 398  class ClassGroupProperties:
398          else:          else:
399              self.SetLineColor(Black)              self.SetLineColor(Black)
400              self.SetLineWidth(1)              self.SetLineWidth(1)
401                self.SetSize(5)
402              self.SetFill(Transparent)              self.SetFill(Transparent)
403    
404      def SetProperties(self, props):      def SetProperties(self, props):
# Line 378  class ClassGroupProperties: Line 407  class ClassGroupProperties:
407          assert isinstance(props, ClassGroupProperties)          assert isinstance(props, ClassGroupProperties)
408          self.SetLineColor(props.GetLineColor())          self.SetLineColor(props.GetLineColor())
409          self.SetLineWidth(props.GetLineWidth())          self.SetLineWidth(props.GetLineWidth())
410            self.SetSize(props.GetSize())
411          self.SetFill(props.GetFill())          self.SetFill(props.GetFill())
412            
413      def GetLineColor(self):      def GetLineColor(self):
414          """Return the line color as a Color object."""          """Return the line color as a Color object."""
415          return self.__stroke          return self.__stroke
# Line 407  class ClassGroupProperties: Line 437  class ClassGroupProperties:
437    
438          self.__strokeWidth = lineWidth          self.__strokeWidth = lineWidth
439    
440        def GetSize(self):
441            """Return the size."""
442            return self.__size
443    
444        def SetSize(self, size):
445            """Set the size.
446    
447            size -- the new size. This must be > 0.
448            """
449            assert isinstance(size, types.IntType)
450            if (size < 1):
451                raise ValueError(_("size < 1"))
452    
453            self.__size = size
454    
455      def GetFill(self):      def GetFill(self):
456          """Return the fill color as a Color object."""          """Return the fill color as a Color object."""
457          return self.__fill          return self.__fill
458    
459      def SetFill(self, fill):      def SetFill(self, fill):
460          """Set the fill color.          """Set the fill color.
461    
# Line 431  class ClassGroupProperties: Line 476  class ClassGroupProperties:
476                   self.__stroke == other.__stroke)        \                   self.__stroke == other.__stroke)        \
477              and (self.__fill is other.__fill or          \              and (self.__fill is other.__fill or          \
478                   self.__fill == other.__fill)            \                   self.__fill == other.__fill)            \
479              and self.__strokeWidth == other.__strokeWidth              and self.__strokeWidth == other.__strokeWidth\
480                and self.__size == other.__size
481    
482      def __ne__(self, other):      def __ne__(self, other):
483          return not self.__eq__(other)          return not self.__eq__(other)
# Line 443  class ClassGroupProperties: Line 489  class ClassGroupProperties:
489          return ClassGroupProperties(self)          return ClassGroupProperties(self)
490    
491      def __repr__(self):      def __repr__(self):
492          return repr((self.__stroke, self.__strokeWidth, self.__fill))          return repr((self.__stroke, self.__strokeWidth, self.__size,
493                        self.__fill))
494    
495  class ClassGroup:  class ClassGroup:
496      """A base class for all Groups within a Classification"""      """A base class for all Groups within a Classification"""
# Line 466  class ClassGroup: Line 513  class ClassGroup:
513      def GetLabel(self):      def GetLabel(self):
514          """Return the Group's label."""          """Return the Group's label."""
515          return self.label          return self.label
516    
517      def SetLabel(self, label):      def SetLabel(self, label):
518          """Set the Group's label.          """Set the Group's label.
519    
# Line 717  class ClassGroupRange(ClassGroup): Line 764  class ClassGroupRange(ClassGroup):
764      def __repr__(self):      def __repr__(self):
765          return "(" + str(self.__range) + ClassGroup.__repr__(self) + ")"          return "(" + str(self.__range) + ClassGroup.__repr__(self) + ")"
766    
767    class ClassGroupPattern(ClassGroup):
768        """A Group that is associated with a reg exp pattern."""
769    
770        def __init__(self, pattern = "", props = None, label = "", group = None):
771            """Constructor.
772    
773            pattern -- the associated pattern.
774    
775            props   -- a ClassGroupProperites object. If props is None a default
776                       set of properties is created.
777    
778            label   -- a label for this group.
779            """
780            ClassGroup.__init__(self, label, props, group)
781    
782            self.SetPattern(pattern)
783    
784        def __copy__(self):
785            return ClassGroupPattern(self.GetPattern(),
786                                       self.GetProperties(),
787                                       self.GetLabel())
788    
789        def __deepcopy__(self, memo):
790            return ClassGroupPattern(self.GetPattern(), group = self)
791    
792        def GetPattern(self):
793            """Return the associated pattern."""
794            return self.__pattern
795    
796        def SetPattern(self, pattern):
797            """Associate this Group with the given pattern."""
798            self.__pattern = pattern
799    
800        def Matches(self, pattern):
801            """Check if the given pattern matches the associated Group pattern."""
802    
803            """Returns True if the value matches, False otherwise."""
804    
805            if re.match(self.__pattern, pattern):
806                return True
807            else:
808                return False
809    
810        def GetDisplayText(self):
811            label = self.GetLabel()
812    
813            if label != "": return label
814    
815            return str(self.GetPattern())
816    
817        def __eq__(self, other):
818            return ClassGroup.__eq__(self, other) \
819                and isinstance(other, ClassGroupPattern) \
820                and self.__pattern == other.__pattern
821    
822        def __repr__(self):
823            return "(" + repr(self.__pattern) + ", " + ClassGroup.__repr__(self) + ")"
824    
825  class ClassGroupMap(ClassGroup):  class ClassGroupMap(ClassGroup):
826      """Currently, this class is not used."""      """Currently, this class is not used."""
827    
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