/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/classgen.py
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revision 1359 by jonathan, Wed Jul 2 10:51:49 2003 UTC revision 1525 by jonathan, Wed Jul 30 15:42:56 2003 UTC
# Line 26  def generate_singletons(_list, ramp): Line 26  def generate_singletons(_list, ramp):
26      The resulting classification will consist of one group for each      The resulting classification will consist of one group for each
27      item in _list whose properties ramp between 'prop1' and 'prop2'.      item in _list whose properties ramp between 'prop1' and 'prop2'.
28    
29      _list -- any object that implements the iterator interface      _list -- a list of values for each singleton
30    
31      ramp -- an object which implements the CustomRamp interface      ramp -- an object which implements the CustomRamp interface
32      """      """
# Line 35  def generate_singletons(_list, ramp): Line 35  def generate_singletons(_list, ramp):
35    
36      i = 0      i = 0
37      maxValue = float(len(_list) - 1)      maxValue = float(len(_list) - 1)
38        if maxValue < 1: maxValue = 1
39    
40      for value in _list:      for value in _list:
41          prop = ramp.GetProperties(i / maxValue)          prop = ramp.GetProperties(i / maxValue)
42          clazz.AppendGroup(ClassGroupSingleton(value, prop))          clazz.AppendGroup(ClassGroupSingleton(value, prop))
# Line 58  def generate_uniform_distribution(min, m Line 60  def generate_uniform_distribution(min, m
60    
61      end = "["      end = "["
62      maxValue = float(numGroups - 1)      maxValue = float(numGroups - 1)
63        if maxValue < 1: maxValue = 1
64    
65      for i in range(1, numGroups + 1):      for i in range(1, numGroups + 1):
66    
67          prop = ramp.GetProperties(float(i-1) / maxValue)          prop = ramp.GetProperties(float(i-1) / maxValue)
68    
69          if intStep:          if intStep:
70              cur_max = min + int(round((i * (max - min + 1)) / maxValue))              cur_max = min + int(round((i * (max - min + 1)) / float(numGroups)))
71          else:          else:
72              cur_max = min + (i * (max - min)) / maxValue              cur_max = min + (i * (max - min)) / float(numGroups)
73    
74          if i == numGroups:          if i == numGroups:
75              cur_max = max              cur_max = max
# Line 125  def generate_quantiles(_list, percents, Line 129  def generate_quantiles(_list, percents,
129              end = "]"              end = "]"
130    
131              maxValue = float(numGroups - 1)              maxValue = float(numGroups - 1)
132                if maxValue < 1: maxValue = 1
133              for (q, p) in quantiles[3]:              for (q, p) in quantiles[3]:
134    
135                  prop = ramp.GetProperties(float(i-1) / maxValue)                  prop = ramp.GetProperties(float(i-1) / maxValue)
# Line 189  def GenQuantiles0(_list, percents, ramp, Line 194  def GenQuantiles0(_list, percents, ramp,
194              end = "]"              end = "]"
195    
196              maxValue = float(numGroups - 1)              maxValue = float(numGroups - 1)
197                if maxValue < 1: maxValue = 1
198              for (q, p) in quantiles[3][1:]:              for (q, p) in quantiles[3][1:]:
199                  prop = ramp.GetProperties(float(i-1) / maxValue)                  prop = ramp.GetProperties(float(i-1) / maxValue)
200    
# Line 371  def calculate_quantiles(_list, percents, Line 377  def calculate_quantiles(_list, percents,
377  class CustomRamp:  class CustomRamp:
378    
379      def __init__(self, prop1, prop2):      def __init__(self, prop1, prop2):
380            """Create a ramp between prop1 and prop2."""
381          self.prop1 = prop1          self.prop1 = prop1
382          self.prop2 = prop2          self.prop2 = prop2
383    
384      def GetRamp(self):      def GetRamp(self):
385            """Return this ramp."""
386          return self          return self
387    
388      def GetProperties(self, index):      def GetProperties(self, index):
# Line 390  class CustomRamp: Line 398  class CustomRamp:
398    
399          newProps = ClassGroupProperties()          newProps = ClassGroupProperties()
400    
401          color1 = self.prop1.GetLineColor()          self.__SetProperty(self.prop1.GetLineColor(),
402          color2 = self.prop2.GetLineColor()                             self.prop2.GetLineColor(),
403                               index, newProps.SetLineColor)
404          self.__SetProperty(color1, color2, index, newProps.SetLineColor)          self.__SetProperty(self.prop1.GetFill(), self.prop2.GetFill(),
405          self.__SetProperty(color1, color2, index, newProps.SetFill)                             index, newProps.SetFill)
406    
407          w = (self.prop2.GetLineWidth() - self.prop1.GetLineWidth()) \          w = (self.prop2.GetLineWidth() - self.prop1.GetLineWidth()) \
408              * index \              * index \
409              + self.prop1.GetLineWidth()              + self.prop1.GetLineWidth()
   
410          newProps.SetLineWidth(int(round(w)))          newProps.SetLineWidth(int(round(w)))
411    
412          return newProps          return newProps
413    
414      def __SetProperty(self, color1, color2, index, setf):      def __SetProperty(self, color1, color2, index, setf):
415            """Use setf to set the appropriate property for the point
416            index percent between color1 and color2. setf is a function
417            to call that accepts a Color object or Transparent.
418            """
419    
420          if color1 is Transparent and color2 is Transparent:          if color1 is Transparent and color2 is Transparent:
421              setf(Transparent)              setf(Transparent)
# Line 425  class CustomRamp: Line 436  class CustomRamp:
436                  (color2.blue  - color1.blue)  * index + color1.blue))                  (color2.blue  - color1.blue)  * index + color1.blue))
437    
438  class MonochromaticRamp(CustomRamp):  class MonochromaticRamp(CustomRamp):
439        """Helper class to make ramps between two colors."""
440    
441      def __init__(self, start, end):      def __init__(self, start, end):
442            """Create a Monochromatic Ramp.
443    
444            start -- starting Color
445    
446            end -- ending Color
447            """
448          sp = ClassGroupProperties()          sp = ClassGroupProperties()
449          sp.SetLineColor(start)          sp.SetLineColor(start)
450          sp.SetFill(start)          sp.SetFill(start)
# Line 436  class MonochromaticRamp(CustomRamp): Line 455  class MonochromaticRamp(CustomRamp):
455    
456          CustomRamp.__init__(self, sp, ep)          CustomRamp.__init__(self, sp, ep)
457    
458  GreyRamp       = MonochromaticRamp(Color(1, 1, 1),  Color(0, 0, 0))  grey_ramp         = MonochromaticRamp(Color(1, 1, 1),  Color(0, 0, 0))
459  RedRamp        = MonochromaticRamp(Color(1, 1, 1),  Color(.8, 0, 0))  red_ramp          = MonochromaticRamp(Color(1, 1, 1),  Color(.8, 0, 0))
460  GreenRamp      = MonochromaticRamp(Color(1, 1, 1),  Color(0, .8, 0))  green_ramp        = MonochromaticRamp(Color(1, 1, 1),  Color(0, .8, 0))
461  BlueRamp       = MonochromaticRamp(Color(1, 1, 1),  Color(0, 0, .8))  blue_ramp         = MonochromaticRamp(Color(1, 1, 1),  Color(0, 0, .8))
462  GreenToRedRamp = MonochromaticRamp(Color(1, .8, 1), Color(1, 0, 0))  green_to_red_ramp = MonochromaticRamp(Color(0, .8, 0), Color(1, 0, 0))
463    
464  class HotToColdRamp:  class HotToColdRamp:
465        """A ramp that generates properties with colors ranging from
466        'hot' colors (e.g. red, orange) to 'cold' colors (e.g. green, blue)
467        """
468    
469      def GetRamp(self):      def GetRamp(self):
470            """Return this ramp."""
471          return self          return self
472    
473      def GetProperties(self, index):      def GetProperties(self, index):
# Line 475  class HotToColdRamp: Line 498  class HotToColdRamp:
498    
499          return prop          return prop
500    
501    class FixedRamp:
502        """FixedRamp allows particular properties of a ramp to be
503        held constant over the ramp.
504        """
505    
506        def __init__(self, ramp, fixes):
507            """
508            ramp -- a source ramp to get the default properties
509    
510            fixes -- a tuple (lineColor, lineWidth, fillColor) such that
511                 if any item is not None, the appropriate property will
512                 be fixed to that item value.
513            """
514    
515            self.fixes = fixes
516            self.ramp = ramp
517    
518        def GetRamp(self):
519            """Return this ramp."""
520            return self
521    
522        def GetProperties(self, index):
523            """Return a ClassGroupProperties object whose properties
524            represent a point at 'index' between the properties in
525            the ramp that initialized this FixedRamp.
526    
527            index -- a value such that 0 <= index <= 1
528            """
529    
530            props = self.ramp.GetProperties(index)
531            if self.fixes[0] is not None: props.SetLineColor(self.fixes[0])
532            if self.fixes[1] is not None: props.SetLineWidth(self.fixes[1])
533            if self.fixes[2] is not None: props.SetFill(self.fixes[2])
534    
535            return props
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