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# Copyright (c) 2001 by Intevation GmbH |
# Copyright (c) 2001, 2003 by Intevation GmbH |
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# Authors: |
# Authors: |
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# Jonathan Coles <[email protected]> |
# Jonathan Coles <[email protected]> |
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# |
# |
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If no mapping can be found then default data will |
If no mapping can be found then default data will |
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be returned. Input values must be hashable objects |
be returned. Input values must be hashable objects |
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See the description of getProperties() for more information |
See the description of FindGroup() for more information |
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on the mapping algorithm. |
on the mapping algorithm. |
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""" |
""" |
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# fix for people using python2.1 |
# fix for people using python2.1 |
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from __future__ import nested_scopes |
from __future__ import nested_scopes |
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from messages import LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \ |
import copy |
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LAYER_VISIBILITY_CHANGED |
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from Thuban import _ |
from Thuban import _ |
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from Thuban.Model.color import Color |
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from wxPython.wx import * |
from types import * |
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from messages import \ |
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LAYER_PROJECTION_CHANGED, \ |
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LAYER_LEGEND_CHANGED, \ |
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LAYER_VISIBILITY_CHANGED |
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from Thuban.Model.color import Color |
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# constants |
import Thuban.Model.layer |
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RANGE_MIN = 0 |
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RANGE_MAX = 1 |
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RANGE_DATA = 2 |
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class Classification: |
class Classification: |
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"""Encapsulates the classification of layer. |
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The Classification divides some kind of data into Groups which |
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are associated with properties. Later the properties can be |
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retrieved by matching data values to the appropriate group. |
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""" |
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def __init__(self, layer, field = None): |
def __init__(self, layer = None, field = None): |
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"""Initialize a classification. |
"""Initialize a classification. |
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layer -- the layer object who owns this classification |
layer -- the Layer object who owns this classification |
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field -- the name of the data table field that |
field -- the name of the data table field that |
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is to be used to classify layer properties |
is to be used to classify layer properties |
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""" |
""" |
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self.layer = layer |
self.layer = None |
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self.points = {} |
self.field = None |
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self.ranges = [] |
self.fieldType = None |
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self.DefaultData = ClassData() |
self.__groups = [] |
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self.field = field |
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#self.SetField(field) |
self.__setLayerLock = False |
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self.SetDefaultGroup(ClassGroupDefault()) |
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self.SetLayer(layer) |
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self.SetField(field) |
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def __iter__(self): |
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return ClassIterator(self.__groups) |
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def __deepcopy__(self, memo): |
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clazz = Classification() |
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# note: the only thing that isn't copied is the layer reference |
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clazz.field = self.field |
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clazz.fieldType = self.fieldType |
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clazz.__groups[0] = copy.deepcopy(self.__groups[0]) |
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for i in range(1, len(self.__groups)): |
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clazz.__groups.append(copy.deepcopy(self.__groups[i])) |
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return clazz |
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def __SendNotification(self): |
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"""Notify the layer that this class has changed.""" |
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if self.layer is not None: |
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self.layer.ClassChanged() |
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def SetField(self, field): |
def SetField(self, field): |
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"""Set the name of the data table field to use. |
"""Set the name of the data table field to use. |
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field -- if None then all values map to the default data |
If there is no layer then the field type is set to None, |
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otherwise the layer is queried to find the type of the |
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field data |
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field -- if None then all values map to the default data |
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""" |
""" |
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if field == "": |
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field = None |
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if field is None: |
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if self.layer is not None: |
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self.fieldType = None |
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else: |
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if self.layer is not None: |
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fieldType = self.layer.GetFieldType(field) |
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if fieldType is None: |
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raise ValueError("'%s' was not found in the layer's table." |
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% self.field) |
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# |
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# unfortunately we cannot call SetFieldType() because it |
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# requires the layer to be None |
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# |
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self.fieldType = fieldType |
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#self.SetFieldType(fieldType) |
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self.field = field |
self.field = field |
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self.layer.changed(LAYER_LEGEND_CHANGED, self.layer) |
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self.__SendNotification() |
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def GetField(self): |
def GetField(self): |
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"""Return the name of the field.""" |
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return self.field |
return self.field |
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def SetDefaultData(self, data): |
def GetFieldType(self): |
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"""Set the data to be used when a value can't be classified. |
"""Return the field type.""" |
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return self.fieldType |
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def SetFieldType(self, type): |
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"""Set the type of the field used by this classification. |
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A ValueError is raised if the owning layer is not None and |
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'type' is different from the current field type. |
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""" |
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if type != self.fieldType: |
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if self.layer is not None: |
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raise ValueError() |
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else: |
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self.fieldType = type |
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self.__SendNotification() |
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data -- data that the value maps to. See class description. |
def SetLayer(self, layer): |
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"""Set the owning Layer of this classification. |
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A ValueError exception will be thrown either the field or |
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field type mismatch the information in the layer's table. |
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""" |
""" |
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self.DefaultData = data |
# prevent infinite recursion when calling SetClassification() |
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if self.__setLayerLock: return |
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def GetDefaultData(self): |
self.__setLayerLock = True |
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return self.DefaultData |
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if layer is None: |
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if self.layer is not None: |
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l = self.layer |
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self.layer = None |
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l.SetClassification(None) |
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else: |
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assert isinstance(layer, Thuban.Model.layer.Layer) |
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old_layer = self.layer |
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self.layer = layer |
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try: |
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self.SetField(self.GetField()) # this sync's the fieldType |
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except ValueError: |
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self.layer = old_layer |
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self.__setLayerLock = False |
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raise ValueError |
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else: |
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self.layer.SetClassification(self) |
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self.__setLayerLock = False |
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def GetLayer(self): |
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"""Return the parent layer.""" |
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return self.layer |
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# |
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# these SetDefault* methods are really only provided for |
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# some backward compatibility. they should be considered |
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# for removal once all the classification code is finished. |
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# |
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def SetDefaultFill(self, fill): |
def SetDefaultFill(self, fill): |
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self.DefaultData.SetFill(fill) |
"""Set the default fill color. |
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self.layer.changed(LAYER_LEGEND_CHANGED, self.layer) |
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fill -- a Color object. |
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""" |
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assert isinstance(fill, Color) |
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self.GetDefaultGroup().GetProperties().SetFill(fill) |
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self.__SendNotification() |
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def GetDefaultFill(self): |
def GetDefaultFill(self): |
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return self.DefaultData.GetFill() |
"""Return the default fill color.""" |
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return self.GetDefaultGroup().GetProperties().GetFill() |
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def SetDefaultStroke(self, stroke): |
def SetDefaultLineColor(self, color): |
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self.DefaultData.SetStroke(stroke) |
"""Set the default line color. |
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self.layer.changed(LAYER_LEGEND_CHANGED, self.layer) |
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color -- a Color object. |
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""" |
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assert isinstance(color, Color) |
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self.GetDefaultGroup().GetProperties().SetLineColor(color) |
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self.__SendNotification() |
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def GetDefaultStroke(self): |
def GetDefaultLineColor(self): |
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return self.DefaultData.GetStroke() |
"""Return the default line color.""" |
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return self.GetDefaultGroup().GetProperties().GetLineColor() |
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def SetDefaultStrokeWidth(self, strokeWidth): |
def SetDefaultLineWidth(self, lineWidth): |
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self.DefaultData.SetStrokeWidth(strokeWidth) |
"""Set the default line width. |
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self.layer.changed(LAYER_LEGEND_CHANGED, self.layer) |
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lineWidth -- an integer > 0. |
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""" |
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assert isinstance(lineWidth, IntType) |
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self.GetDefaultGroup().GetProperties().SetLineWidth(lineWidth) |
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self.__SendNotification() |
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def GetDefaultStrokeWidth(self): |
def GetDefaultLineWidth(self): |
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return self.DefaultData.GetStrokeWidth() |
"""Return the default line width.""" |
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return self.GetDefaultGroup().GetProperties().GetLineWidth() |
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def AddRange(self, min, max, data): |
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"""Add a new range to the classification. |
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A range allows a value to be classified if it falls between |
# |
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min and max. Specifically, min <= value < max |
# The methods that manipulate self.__groups have to be kept in |
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# sync. We store the default group in index 0 to make it |
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min -- the lower bound. |
# convienent to iterate over the classification's groups, but |
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# from the user's perspective the first (non-default) group is |
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# at index 0 and the DefaultGroup is a special entity. |
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# |
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max -- the upper bound. |
def SetDefaultGroup(self, group): |
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"""Set the group to be used when a value can't be classified. |
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data -- data that the value maps to. See class description. |
group -- group that the value maps to. |
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""" |
""" |
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if min >= max: |
assert isinstance(group, ClassGroupDefault) |
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raise ValueError(_("Range minimum >= maximum!")) |
if len(self.__groups) > 0: |
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self.ranges.append([min, max, data]) |
self.__groups[0] = group |
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self.layer.changed(LAYER_LEGEND_CHANGED, self.layer) |
else: |
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self.__groups.append(group) |
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def GetDefaultGroup(self): |
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"""Return the default group.""" |
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return self.__groups[0] |
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def AppendGroup(self, item): |
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"""Append a new ClassGroup item to the classification. |
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item -- this must be a valid ClassGroup object |
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""" |
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self.InsertGroup(self.GetNumGroups(), item) |
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def InsertGroup(self, index, group): |
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assert isinstance(group, ClassGroup) |
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self.__groups.insert(index + 1, group) |
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self.__SendNotification() |
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def RemoveGroup(self, index): |
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return self.__groups.pop(index + 1) |
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def ReplaceGroup(self, index, group): |
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assert isinstance(group, ClassGroup) |
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def AddPoint(self, value, data): |
self.__groups[index + 1] = group |
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"""Associate a single value with data. |
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When this value is to be classified data will be returned. |
self.__SendNotification() |
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value -- classification value. |
def GetGroup(self, index): |
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return self.__groups[index + 1] |
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data -- data that the value maps to. See class description. |
def GetNumGroups(self): |
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"""Return the number of non-default groups in the classification.""" |
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return len(self.__groups) - 1 |
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def FindGroup(self, value): |
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"""Return the associated group, or the default group. |
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Groups are checked in the order the were added to the |
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Classification. |
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value -- the value to classify. If there is no mapping, |
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the field is None or value is None, |
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return the default properties |
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""" |
""" |
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self.points[value] = data |
if self.GetField() is not None and value is not None: |
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self.layer.changed(LAYER_LEGEND_CHANGED, self.layer) |
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def GetProperties(self, value): |
for i in range(1, len(self.__groups)): |
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"""Return the associated data, or the default data. |
group = self.__groups[i] |
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if group.Matches(value): |
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return group |
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The following search technique is used: |
return self.GetDefaultGroup() |
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(1) if the field is None, return the default data |
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(2) check if the value exists as a single value |
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(3) check if the value falls within a range. Ranges |
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are checked in the order they were added to |
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the classification. |
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value -- the value to classify. If there is no mapping, |
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or value is None, return the default data |
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(which may be None) |
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""" |
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if self.field is not None and value is not None: |
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# |
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# first check the discrete values |
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# |
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if self.points.has_key(value): |
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return self.points[value] |
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# |
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# now check the ranges |
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# |
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for p in self.ranges: |
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if (p[RANGE_MIN] <= value) and (value < p[RANGE_MAX]): |
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return p[RANGE_DATA] |
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def GetProperties(self, value): |
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"""Return the properties associated with the given value. |
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Use this function rather than Classification.FindGroup().GetProperties() |
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since the returned group may be a ClassGroupMap which doesn't support |
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a call to GetProperties(). |
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""" |
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return self.DefaultData |
group = self.FindGroup(value) |
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if isinstance(group, ClassGroupMap): |
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return group.GetPropertiesFromValue(value) |
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else: |
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return group.GetProperties() |
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def TreeInfo(self): |
def TreeInfo(self): |
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items = [] |
items = [] |
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# |
def build_color_item(text, color): |
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# XXX: shouldn't print anything if there are no classifications |
if color is Color.Transparent: |
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# |
return ("%s: %s" % (text, _("None")), None) |
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return ("%s: (%.3f, %.3f, %.3f)" % |
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(text, color.red, color.green, color.blue), |
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color) |
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def build_item(group, string): |
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label = group.GetLabel() |
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if label == "": |
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label = string |
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else: |
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label += " (%s)" % string |
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props = group.GetProperties() |
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i = [] |
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v = props.GetLineColor() |
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i.append(build_color_item(_("Line Color"), v)) |
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v = props.GetLineWidth() |
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i.append(_("Line Width: %s") % v) |
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v = props.GetFill() |
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i.append(build_color_item(_("Fill"), v)) |
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return (label, i) |
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for p in self: |
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items.append(build_item(p, p.GetDisplayText())) |
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# if isinstance(p, ClassGroupDefault): |
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# items.append(build_item(self.GetDefaultGroup(), _("'DEFAULT'"))) |
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# elif isinstance(p, ClassGroupSingleton): |
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# items.append(build_item(p, str(p.GetValue()))) |
| 361 |
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# elif isinstance(p, ClassGroupRange): |
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# items.append(build_item(p, "%s - %s" % |
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# (p.GetMin(), p.GetMax()))) |
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return (_("Classification"), items) |
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class ClassIterator: |
| 368 |
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"""Allows the Groups in a Classifcation to be interated over. |
| 369 |
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| 370 |
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The items are returned in the following order: |
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default data, singletons, ranges, maps |
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""" |
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def __init__(self, data): #default, points, ranges, maps): |
| 375 |
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"""Constructor. |
| 376 |
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default -- the default group |
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points -- a list of singleton groups |
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ranges -- a list of range groups |
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maps -- a list of map groups |
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""" |
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self.data = data #[default, points, ranges, maps] |
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self.data_index = 0 |
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#self.data_iter = iter(self.data) |
| 389 |
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#self.iter = None |
| 390 |
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| 391 |
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def __iter__(self): |
| 392 |
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return self |
| 393 |
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def next(self): |
| 395 |
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"""Return the next item.""" |
| 396 |
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| 397 |
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if self.data_index >= len(self.data): |
| 398 |
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raise StopIteration |
| 399 |
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else: |
| 400 |
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d = self.data[self.data_index] |
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self.data_index += 1 |
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return d |
| 403 |
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| 404 |
def color_string(color): |
# if self.iter is None: |
| 405 |
if color is None: |
# try: |
| 406 |
return "None" |
# self.data_item = self.data_iter.next() |
| 407 |
return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue) |
# self.iter = iter(self.data_item) |
| 408 |
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# except TypeError: |
| 409 |
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# return self.data_item |
| 410 |
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|
| 411 |
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# try: |
| 412 |
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# return self.iter.next() |
| 413 |
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# except StopIteration: |
| 414 |
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# self.iter = None |
| 415 |
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# return self.next() |
| 416 |
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| 417 |
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class ClassGroupProperties: |
| 418 |
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"""Represents the properties of a single Classification Group. |
| 419 |
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| 420 |
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These are used when rendering a layer.""" |
| 421 |
|
|
| 422 |
def build_item(data): |
def __init__(self, props = None): |
| 423 |
i = [] |
"""Constructor. |
| 424 |
|
|
| 425 |
v = data.GetStroke() |
props -- a ClassGroupProperties object. The class is copied if |
| 426 |
i.append((_("Stroke: %s") % color_string(v), v)) |
prop is not None. Otherwise, a default set of properties |
| 427 |
v = data.GetStrokeWidth() |
is created such that: line color = Color.Black, line width = 1, |
| 428 |
i.append((_("Stroke Width: %s") % v)) |
and fill color = Color.Transparent |
| 429 |
v = data.GetFill() |
""" |
| 430 |
i.append((_("Fill: %s") % color_string(v), v)) |
|
| 431 |
return i |
#self.stroke = None |
| 432 |
|
#self.strokeWidth = 0 |
| 433 |
items.append((_("'DEFAULT'"), build_item(self.DefaultData))) |
#self.fill = None |
| 434 |
|
|
| 435 |
for name, data in self.points.items(): |
if props is not None: |
| 436 |
items.append((_("%s") % name, build_item(data))) |
self.SetProperties(props) |
| 437 |
|
else: |
| 438 |
for p in self.ranges: |
self.SetLineColor(Color.Black) |
| 439 |
data = p[RANGE_DATA] |
self.SetLineWidth(1) |
| 440 |
items.append((_("%s-%s") % (p[RANGE_MIN], p[RANGE_MAX])), |
self.SetFill(Color.Transparent) |
| 441 |
build_item(data)) |
|
| 442 |
|
def SetProperties(self, props): |
| 443 |
return (_("Classifications"), items) |
"""Set this class's properties to those in class props.""" |
| 444 |
|
|
| 445 |
|
assert isinstance(props, ClassGroupProperties) |
| 446 |
class ClassData: |
self.SetLineColor(props.GetLineColor()) |
| 447 |
|
self.SetLineWidth(props.GetLineWidth()) |
| 448 |
def __init__(self): |
self.SetFill(props.GetFill()) |
| 449 |
self.stroke = None |
|
| 450 |
self.stroke_width = 0 |
def GetLineColor(self): |
| 451 |
self.fill = None |
"""Return the line color as a Color object.""" |
| 452 |
self.label = "" |
return self.__stroke |
| 453 |
|
|
| 454 |
def GetStroke(self): |
def SetLineColor(self, color): |
| 455 |
return self.stroke |
"""Set the line color. |
| 456 |
|
|
| 457 |
def SetStroke(self, stroke): |
color -- the color of the line. This must be a Color object. |
| 458 |
self.stroke = stroke |
""" |
| 459 |
|
|
| 460 |
def GetStrokeWidth(self): |
assert isinstance(color, Color) |
| 461 |
return self.stroke_width |
self.__stroke = color |
| 462 |
|
|
| 463 |
def SetStrokeWidth(self, stroke_width): |
def GetLineWidth(self): |
| 464 |
self.stroke_width = stroke_width |
"""Return the line width.""" |
| 465 |
|
return self.__strokeWidth |
| 466 |
|
|
| 467 |
|
def SetLineWidth(self, lineWidth): |
| 468 |
|
"""Set the line width. |
| 469 |
|
|
| 470 |
|
lineWidth -- the new line width. This must be > 0. |
| 471 |
|
""" |
| 472 |
|
assert isinstance(lineWidth, IntType) |
| 473 |
|
if (lineWidth < 1): |
| 474 |
|
raise ValueError(_("lineWidth < 1")) |
| 475 |
|
|
| 476 |
|
self.__strokeWidth = lineWidth |
| 477 |
|
|
| 478 |
def GetFill(self): |
def GetFill(self): |
| 479 |
return self.fill |
"""Return the fill color as a Color object.""" |
| 480 |
|
return self.__fill |
| 481 |
|
|
| 482 |
def SetFill(self, fill): |
def SetFill(self, fill): |
| 483 |
self.fill = fill |
"""Set the fill color. |
| 484 |
|
|
| 485 |
|
fill -- the color of the fill. This must be a Color object. |
| 486 |
|
""" |
| 487 |
|
|
| 488 |
|
assert isinstance(fill, Color) |
| 489 |
|
self.__fill = fill |
| 490 |
|
|
| 491 |
|
def __eq__(self, other): |
| 492 |
|
"""Return true if 'props' has the same attributes as this class""" |
| 493 |
|
|
| 494 |
|
# |
| 495 |
|
# using 'is' over '==' results in a huge performance gain |
| 496 |
|
# in the renderer |
| 497 |
|
# |
| 498 |
|
return isinstance(other, ClassGroupProperties) \ |
| 499 |
|
and (self.__stroke is other.__stroke or \ |
| 500 |
|
self.__stroke == other.__stroke) \ |
| 501 |
|
and (self.__fill is other.__fill or \ |
| 502 |
|
self.__fill == other.__fill) \ |
| 503 |
|
and self.__strokeWidth == other.__strokeWidth |
| 504 |
|
|
| 505 |
|
def __ne__(self, other): |
| 506 |
|
return not self.__eq__(other) |
| 507 |
|
|
| 508 |
|
def __copy__(self): |
| 509 |
|
return ClassGroupProperties(self) |
| 510 |
|
|
| 511 |
|
def __deepcopy__(self): |
| 512 |
|
return ClassGroupProperties(self) |
| 513 |
|
|
| 514 |
|
class ClassGroup: |
| 515 |
|
"""A base class for all Groups within a Classification""" |
| 516 |
|
|
| 517 |
|
def __init__(self, label = "", props = None, group = None): |
| 518 |
|
"""Constructor. |
| 519 |
|
|
| 520 |
|
label -- A string representing the Group's label |
| 521 |
|
""" |
| 522 |
|
|
| 523 |
|
if group is not None: |
| 524 |
|
self.SetLabel(copy.copy(group.GetLabel())) |
| 525 |
|
self.SetProperties(copy.copy(group.GetProperties())) |
| 526 |
|
self.SetVisible(group.IsVisible()) |
| 527 |
|
else: |
| 528 |
|
self.SetLabel(label) |
| 529 |
|
self.SetProperties(props) |
| 530 |
|
self.SetVisible(True) |
| 531 |
|
|
| 532 |
def GetLabel(self): |
def GetLabel(self): |
| 533 |
|
"""Return the Group's label.""" |
| 534 |
return self.label |
return self.label |
| 535 |
|
|
| 536 |
def SetLabel(self, label): |
def SetLabel(self, label): |
| 537 |
|
"""Set the Group's label. |
| 538 |
|
|
| 539 |
|
label -- a string representing the Group's label. This must |
| 540 |
|
not be None. |
| 541 |
|
""" |
| 542 |
|
assert isinstance(label, StringType) |
| 543 |
self.label = label |
self.label = label |
| 544 |
|
|
| 545 |
|
def GetDisplayText(self): |
| 546 |
|
assert False, "GetDisplay must be overridden by subclass!" |
| 547 |
|
return "" |
| 548 |
|
|
| 549 |
|
def Matches(self, value): |
| 550 |
|
"""Determines if this Group is associated with the given value. |
| 551 |
|
|
| 552 |
|
Returns False. This needs to be overridden by all subclasses. |
| 553 |
|
""" |
| 554 |
|
assert False, "GetMatches must be overridden by subclass!" |
| 555 |
|
return False |
| 556 |
|
|
| 557 |
|
def GetProperties(self): |
| 558 |
|
"""Return the properties associated with the given value.""" |
| 559 |
|
|
| 560 |
|
return self.prop |
| 561 |
|
|
| 562 |
|
def SetProperties(self, prop): |
| 563 |
|
"""Set the properties associated with this Group. |
| 564 |
|
|
| 565 |
|
prop -- a ClassGroupProperties object. if prop is None, |
| 566 |
|
a default set of properties is created. |
| 567 |
|
""" |
| 568 |
|
|
| 569 |
|
if prop is None: prop = ClassGroupProperties() |
| 570 |
|
assert isinstance(prop, ClassGroupProperties) |
| 571 |
|
self.prop = prop |
| 572 |
|
|
| 573 |
|
def IsVisible(self): |
| 574 |
|
return self.visible |
| 575 |
|
|
| 576 |
|
def SetVisible(self, visible): |
| 577 |
|
self.visible = visible |
| 578 |
|
|
| 579 |
|
def __eq__(self, other): |
| 580 |
|
return isinstance(other, ClassGroup) \ |
| 581 |
|
and self.GetProperties() == other.GetProperties() |
| 582 |
|
|
| 583 |
|
def __ne__(self, other): |
| 584 |
|
return not self.__eq__(other) |
| 585 |
|
|
| 586 |
|
|
| 587 |
|
class ClassGroupSingleton(ClassGroup): |
| 588 |
|
"""A Group that is associated with a single value.""" |
| 589 |
|
|
| 590 |
|
def __init__(self, value = 0, props = None, label = "", group = None): |
| 591 |
|
"""Constructor. |
| 592 |
|
|
| 593 |
|
value -- the associated value. |
| 594 |
|
|
| 595 |
|
prop -- a ClassGroupProperites object. If prop is None a default |
| 596 |
|
set of properties is created. |
| 597 |
|
|
| 598 |
|
label -- a label for this group. |
| 599 |
|
""" |
| 600 |
|
ClassGroup.__init__(self, label, props, group) |
| 601 |
|
|
| 602 |
|
self.SetValue(value) |
| 603 |
|
|
| 604 |
|
def __copy__(self): |
| 605 |
|
return ClassGroupSingleton(self.GetValue(), |
| 606 |
|
self.GetProperties(), |
| 607 |
|
self.GetLabel()) |
| 608 |
|
|
| 609 |
|
def __deepcopy__(self, memo): |
| 610 |
|
return ClassGroupSingleton(self.GetValue(), group = self) |
| 611 |
|
|
| 612 |
|
def GetValue(self): |
| 613 |
|
"""Return the associated value.""" |
| 614 |
|
return self.__value |
| 615 |
|
|
| 616 |
|
def SetValue(self, value): |
| 617 |
|
"""Associate this Group with the given value.""" |
| 618 |
|
self.__value = value |
| 619 |
|
|
| 620 |
|
def Matches(self, value): |
| 621 |
|
"""Determine if the given value matches the associated Group value.""" |
| 622 |
|
|
| 623 |
|
"""Returns True if the value matches, False otherwise.""" |
| 624 |
|
|
| 625 |
|
return self.__value == value |
| 626 |
|
|
| 627 |
|
def GetDisplayText(self): |
| 628 |
|
label = self.GetLabel() |
| 629 |
|
|
| 630 |
|
if label != "": return label |
| 631 |
|
|
| 632 |
|
return str(self.GetValue()) |
| 633 |
|
|
| 634 |
|
def __eq__(self, other): |
| 635 |
|
return ClassGroup.__eq__(self, other) \ |
| 636 |
|
and isinstance(other, ClassGroupSingleton) \ |
| 637 |
|
and self.__value == other.__value |
| 638 |
|
|
| 639 |
|
class ClassGroupDefault(ClassGroup): |
| 640 |
|
"""The default Group. When values do not match any other |
| 641 |
|
Group within a Classification, the properties from this |
| 642 |
|
class are used.""" |
| 643 |
|
|
| 644 |
|
def __init__(self, props = None, label = "", group = None): |
| 645 |
|
"""Constructor. |
| 646 |
|
|
| 647 |
|
prop -- a ClassGroupProperites object. If prop is None a default |
| 648 |
|
set of properties is created. |
| 649 |
|
|
| 650 |
|
label -- a label for this group. |
| 651 |
|
""" |
| 652 |
|
|
| 653 |
|
ClassGroup.__init__(self, label, props, group) |
| 654 |
|
|
| 655 |
|
def __copy__(self): |
| 656 |
|
return ClassGroupDefault(self.GetProperties(), self.GetLabel()) |
| 657 |
|
|
| 658 |
|
def __deepcopy__(self, memo): |
| 659 |
|
return ClassGroupDefault(label = self.GetLabel(), group = self) |
| 660 |
|
|
| 661 |
|
def Matches(self, value): |
| 662 |
|
return True |
| 663 |
|
|
| 664 |
|
def GetDisplayText(self): |
| 665 |
|
label = self.GetLabel() |
| 666 |
|
|
| 667 |
|
if label != "": return label |
| 668 |
|
|
| 669 |
|
return _("DEFAULT") |
| 670 |
|
|
| 671 |
|
def __eq__(self, other): |
| 672 |
|
return ClassGroup.__eq__(self, other) \ |
| 673 |
|
and isinstance(other, ClassGroupDefault) \ |
| 674 |
|
and self.GetProperties() == other.GetProperties() |
| 675 |
|
|
| 676 |
|
class ClassGroupRange(ClassGroup): |
| 677 |
|
"""A Group that represents a range of values that map to the same |
| 678 |
|
set of properties.""" |
| 679 |
|
|
| 680 |
|
def __init__(self, min = 0, max = 1, props = None, label = "", group=None): |
| 681 |
|
"""Constructor. |
| 682 |
|
|
| 683 |
|
The minumum value must be strictly less than the maximum. |
| 684 |
|
|
| 685 |
|
min -- the minimum range value |
| 686 |
|
|
| 687 |
|
max -- the maximum range value |
| 688 |
|
|
| 689 |
|
prop -- a ClassGroupProperites object. If prop is None a default |
| 690 |
|
set of properties is created. |
| 691 |
|
|
| 692 |
|
label -- a label for this group. |
| 693 |
|
""" |
| 694 |
|
|
| 695 |
|
ClassGroup.__init__(self, label, props, group) |
| 696 |
|
|
| 697 |
|
self.__min = self.__max = 0 |
| 698 |
|
|
| 699 |
|
self.SetRange(min, max) |
| 700 |
|
|
| 701 |
|
def __copy__(self): |
| 702 |
|
return ClassGroupRange(self.GetMin(), |
| 703 |
|
self.GetMax(), |
| 704 |
|
self.GetProperties(), |
| 705 |
|
self.GetLabel()) |
| 706 |
|
|
| 707 |
|
def __deepcopy__(self, memo): |
| 708 |
|
return ClassGroupRange(copy.copy(self.GetMin()), |
| 709 |
|
copy.copy(self.GetMax()), |
| 710 |
|
group = self) |
| 711 |
|
|
| 712 |
|
def GetMin(self): |
| 713 |
|
"""Return the range's minimum value.""" |
| 714 |
|
return self.__min |
| 715 |
|
|
| 716 |
|
def SetMin(self, min): |
| 717 |
|
"""Set the range's minimum value. |
| 718 |
|
|
| 719 |
|
min -- the new minimum. Note that this must be less than the current |
| 720 |
|
maximum value. Use SetRange() to change both min and max values. |
| 721 |
|
""" |
| 722 |
|
|
| 723 |
|
self.SetRange(min, self.__max) |
| 724 |
|
|
| 725 |
|
def GetMax(self): |
| 726 |
|
"""Return the range's maximum value.""" |
| 727 |
|
return self.__max |
| 728 |
|
|
| 729 |
|
def SetMax(self, max): |
| 730 |
|
"""Set the range's maximum value. |
| 731 |
|
|
| 732 |
|
max -- the new maximum. Note that this must be greater than the current |
| 733 |
|
minimum value. Use SetRange() to change both min and max values. |
| 734 |
|
""" |
| 735 |
|
self.SetRange(self.__min, max) |
| 736 |
|
|
| 737 |
|
def SetRange(self, min, max): |
| 738 |
|
"""Set a new range. |
| 739 |
|
|
| 740 |
|
Note that min must be strictly less than max. |
| 741 |
|
|
| 742 |
|
min -- the new minimum value |
| 743 |
|
min -- the new maximum value |
| 744 |
|
""" |
| 745 |
|
|
| 746 |
|
if min >= max: |
| 747 |
|
raise ValueError(_("ClassGroupRange: %i(min) >= %i(max)!") % |
| 748 |
|
(min, max)) |
| 749 |
|
self.__min = min |
| 750 |
|
self.__max = max |
| 751 |
|
|
| 752 |
|
def GetRange(self): |
| 753 |
|
"""Return the range as a tuple (min, max)""" |
| 754 |
|
return (self.__min, self.__max) |
| 755 |
|
|
| 756 |
|
def Matches(self, value): |
| 757 |
|
"""Determine if the given value lies with the current range. |
| 758 |
|
|
| 759 |
|
The following check is used: min <= value < max. |
| 760 |
|
""" |
| 761 |
|
|
| 762 |
|
return self.__min <= value < self.__max |
| 763 |
|
|
| 764 |
|
def GetDisplayText(self): |
| 765 |
|
label = self.GetLabel() |
| 766 |
|
|
| 767 |
|
if label != "": return label |
| 768 |
|
|
| 769 |
|
return _("%s - %s") % (self.GetMin(), self.GetMax()) |
| 770 |
|
|
| 771 |
|
def __eq__(self, other): |
| 772 |
|
return ClassGroup.__eq__(self, other) \ |
| 773 |
|
and isinstance(other, ClassGroupRange) \ |
| 774 |
|
and self.__min == other.__min \ |
| 775 |
|
and self.__max == other.__max |
| 776 |
|
|
| 777 |
|
class ClassGroupMap(ClassGroup): |
| 778 |
|
"""Currently, this class is not used.""" |
| 779 |
|
|
| 780 |
|
FUNC_ID = "id" |
| 781 |
|
|
| 782 |
|
def __init__(self, map_type = FUNC_ID, func = None, prop = None, label=""): |
| 783 |
|
ClassGroup.__init__(self, label) |
| 784 |
|
|
| 785 |
|
self.map_type = map_type |
| 786 |
|
self.func = func |
| 787 |
|
|
| 788 |
|
if self.func is None: |
| 789 |
|
self.func = func_id |
| 790 |
|
|
| 791 |
|
def Map(self, value): |
| 792 |
|
return self.func(value) |
| 793 |
|
|
| 794 |
|
def GetProperties(self): |
| 795 |
|
return None |
| 796 |
|
|
| 797 |
|
def GetPropertiesFromValue(self, value): |
| 798 |
|
pass |
| 799 |
|
|
| 800 |
|
def GetDisplayText(self): |
| 801 |
|
return "Map: " + self.map_type |
| 802 |
|
|
| 803 |
|
# |
| 804 |
|
# built-in mappings |
| 805 |
|
# |
| 806 |
|
def func_id(value): |
| 807 |
|
return value |
| 808 |
|
|
Parent Directory
| 
Revision Log
| 
Patch