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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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First, specific values can be associated with data. |
First, specific values can be associated with data. |
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Second, ranges can be associated with data such that if |
Second, ranges can be associated with data such that if |
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an input value falls with a range that data is returned. |
an input value falls with a range that data is returned. |
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If no mapping can be found then a NullData 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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|
|
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See the description of getProperties() for more information |
See the description of GetGroup() for more information |
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on the mapping algorithm. |
on the mapping algorithm. |
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""" |
""" |
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|
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# fix for people using python2.1 |
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from __future__ import nested_scopes |
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import copy |
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from types import * |
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from messages import LAYER_PROJECTION_CHANGED, LAYER_LEGEND_CHANGED, \ |
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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 |
from Thuban.Model.color import Color |
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|
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from wxPython.wx import * |
import Thuban.Model.layer |
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# constants |
# constants |
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RANGE_MIN = 0 |
RANGE_MIN = 0 |
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RANGE_DATA = 2 |
RANGE_DATA = 2 |
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class Classification: |
class Classification: |
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"""Encapsulates the classification of layer. The Classification |
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divides some kind of data into Groups which are associated with |
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properties. Later the properties can be retrieved by matching |
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data values to the appropriate group.""" |
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def __init__(self, layer = None, field = None): |
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def __init__(self, field = None): |
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"""Initialize a classification. |
"""Initialize a classification. |
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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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|
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self.points = {} |
self.layer = None |
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self.ranges = [] |
self.field = None |
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self.setField(field) |
self.fieldType = None |
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self.setNull(None) |
self.groups = [] |
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def setField(self, 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 __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): |
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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 NullData |
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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def setNull(self, data): |
self.__SendNotification() |
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"""Set the data to be used when a value can't be classified. |
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data -- data that the value maps to. See class description. |
def GetField(self): |
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""" |
"""Return the name of the field.""" |
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return self.field |
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self.NullData = data |
def GetFieldType(self): |
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"""Return the field type.""" |
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return self.fieldType |
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def addRange(self, min, max, data): |
def SetFieldType(self, type): |
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"""Add a new range to the classification. |
"""Set the type of the field used by this classification. |
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A range allows a value to be classified if it falls between |
A ValueError is raised if the owning layer is not None and |
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min and max. Specifically, min <= value < max |
'type' is different from the current field type. |
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""" |
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min -- the lower bound. |
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max -- the upper bound. |
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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if min >= max: |
# prevent infinite recursion when calling SetClassification() |
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raise ValueError(_("Range minimum >= maximum!")) |
if self.__setLayerLock: return |
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self.ranges.append([min, max, data]) |
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def addPoint(self, value, data): |
self.__setLayerLock = True |
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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. |
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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value -- classification value. |
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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self.points[value] = data |
assert isinstance(group, ClassGroupDefault) |
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self.AddGroup(group) |
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def getProperties(self, value): |
def GetDefaultGroup(self): |
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"""Return the associated data, or the NullData. |
"""Return the default group.""" |
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return self.groups[0] |
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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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The following search technique is used: |
def SetDefaultFill(self, fill): |
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(1) if the field is None, return NullData |
"""Set the default fill color. |
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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 |
fill -- a Color object. |
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return the NullData (which may be None) |
|
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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): |
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"""Return the default fill color.""" |
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return self.GetDefaultGroup().GetProperties().GetFill() |
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def SetDefaultLineColor(self, color): |
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"""Set the default line color. |
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if self.field is not None: |
color -- a Color object. |
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# |
""" |
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# first check the discrete values |
assert isinstance(color, Color) |
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# |
self.GetDefaultGroup().GetProperties().SetLineColor(color) |
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if self.points.has_key(value): |
self.__SendNotification() |
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return self.points[value] |
|
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def GetDefaultLineColor(self): |
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"""Return the default line color.""" |
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return self.GetDefaultGroup().GetProperties().GetLineColor() |
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def SetDefaultLineWidth(self, lineWidth): |
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"""Set the default line width. |
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# |
lineWidth -- an integer > 0. |
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# now check the ranges |
""" |
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# |
assert isinstance(lineWidth, IntType) |
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for p in self.ranges: |
self.GetDefaultGroup().GetProperties().SetLineWidth(lineWidth) |
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if (p[RANGE_MIN] <= value) and (value < p[RANGE_MAX]): |
self.__SendNotification() |
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return p[RANGE_DATA] |
|
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def GetDefaultLineWidth(self): |
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"""Return the default line width.""" |
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return self.GetDefaultGroup().GetProperties().GetLineWidth() |
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def AddGroup(self, item): |
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"""Add 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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assert isinstance(item, ClassGroup) |
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if len(self.groups) > 0 and isinstance(item, ClassGroupDefault): |
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self.groups[0] = item |
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else: |
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self.groups.append(item) |
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self.__SendNotification() |
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def GetGroup(self, value): |
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"""Return the associated group, or the default group. |
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|
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Groups are checked in the order the were added to the |
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Classification. |
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|
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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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|
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if self.GetField() is not None and value is not None: |
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|
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return self.NullData |
for i in range(1, len(self.groups)): |
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group = self.groups[i] |
| 262 |
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if group.Matches(value): |
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return group |
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return self.GetDefaultGroup() |
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def GetProperties(self, value): |
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"""Return the properties associated with the given value.""" |
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|
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group = self.GetGroup(value) |
| 271 |
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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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|
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def TreeInfo(self): |
def TreeInfo(self): |
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items = [] |
items = [] |
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|
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# |
def build_color_item(text, color): |
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# shouldn't print anything if there are no classifications |
if color is Color.None: |
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# |
return ("%s: %s" % (text, _("None")), None) |
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|
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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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|
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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: |
| 292 |
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label += " (%s)" % string |
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|
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props = group.GetProperties() |
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i = [] |
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v = props.GetLineColor() |
| 297 |
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i.append(build_color_item(_("Line Color"), v)) |
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v = props.GetLineWidth() |
| 299 |
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i.append(_("Line Width: %s") % v) |
| 300 |
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v = props.GetFill() |
| 301 |
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i.append(build_color_item(_("Fill"), v)) |
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return (label, i) |
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|
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for p in self: |
| 305 |
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if isinstance(p, ClassGroupDefault): |
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items.append(build_item(self.GetDefaultGroup(), _("'DEFAULT'"))) |
| 307 |
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elif isinstance(p, ClassGroupSingleton): |
| 308 |
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items.append(build_item(p, str(p.GetValue()))) |
| 309 |
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elif isinstance(p, ClassGroupRange): |
| 310 |
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items.append(build_item(p, "%s - %s" % |
| 311 |
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(p.GetMin(), p.GetMax()))) |
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|
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return (_("Classification"), items) |
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|
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|
class ClassIterator: |
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"""Allows the Groups in a Classifcation to be interated over. |
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|
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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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|
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def __init__(self, data): #default, points, ranges, maps): |
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"""Constructor. |
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default -- the default group |
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points -- a list of singleton groups |
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|
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ranges -- a list of range groups |
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|
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maps -- a list of map groups |
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""" |
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|
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self.data = data #[default, points, ranges, maps] |
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self.data_index = 0 |
| 336 |
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#self.data_iter = iter(self.data) |
| 337 |
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#self.iter = None |
| 338 |
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| 339 |
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def __iter__(self): |
| 340 |
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return self |
| 341 |
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def next(self): |
| 343 |
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"""Return the next item.""" |
| 344 |
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|
| 345 |
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if self.data_index >= len(self.data): |
| 346 |
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raise StopIteration |
| 347 |
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else: |
| 348 |
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d = self.data[self.data_index] |
| 349 |
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self.data_index += 1 |
| 350 |
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return d |
| 351 |
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|
| 352 |
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# if self.iter is None: |
| 353 |
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# try: |
| 354 |
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# self.data_item = self.data_iter.next() |
| 355 |
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# self.iter = iter(self.data_item) |
| 356 |
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# except TypeError: |
| 357 |
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# return self.data_item |
| 358 |
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|
| 359 |
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# try: |
| 360 |
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# return self.iter.next() |
| 361 |
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# except StopIteration: |
| 362 |
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# self.iter = None |
| 363 |
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# return self.next() |
| 364 |
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|
| 365 |
|
class ClassGroupProperties: |
| 366 |
|
"""Represents the properties of a single Classification Group. |
| 367 |
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|
| 368 |
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These are used when rendering a layer.""" |
| 369 |
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|
| 370 |
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def __init__(self, props = None): |
| 371 |
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"""Constructor. |
| 372 |
|
|
| 373 |
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props -- a ClassGroupProperties object. The class is copied if |
| 374 |
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prop is not None. Otherwise, a default set of properties |
| 375 |
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is created such that: line color = Color.Black, line width = 1, |
| 376 |
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and fill color = Color.None |
| 377 |
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""" |
| 378 |
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|
| 379 |
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self.stroke = None |
| 380 |
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self.strokeWidth = 0 |
| 381 |
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self.fill = None |
| 382 |
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|
| 383 |
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if props is not None: |
| 384 |
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self.SetProperties(props) |
| 385 |
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else: |
| 386 |
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self.SetLineColor(Color.Black) |
| 387 |
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self.SetLineWidth(1) |
| 388 |
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self.SetFill(Color.None) |
| 389 |
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|
| 390 |
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def SetProperties(self, props): |
| 391 |
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"""Set this class's properties to those in class props.""" |
| 392 |
|
|
| 393 |
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assert isinstance(props, ClassGroupProperties) |
| 394 |
|
self.SetLineColor(props.GetLineColor()) |
| 395 |
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self.SetLineWidth(props.GetLineWidth()) |
| 396 |
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self.SetFill(props.GetFill()) |
| 397 |
|
|
| 398 |
def color_string(color): |
def GetLineColor(self): |
| 399 |
if color is None: |
"""Return the line color as a Color object.""" |
| 400 |
return "None" |
return self.stroke |
|
return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue) |
|
| 401 |
|
|
| 402 |
if self.NullData is not None: |
def SetLineColor(self, color): |
| 403 |
i = [] |
"""Set the line color. |
|
for key, value in self.NullData.items(): |
|
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if isinstance(value, Color): |
|
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i.append((_("%s: %s") % (key, color_string(value)), value)) |
|
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else: |
|
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i.append(_("%s: %s") % (key, value)) |
|
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items.append((_("'NULL'"), i)) |
|
| 404 |
|
|
| 405 |
for name, data in self.points.items(): |
color -- the color of the line. This must be a Color object. |
| 406 |
i = [] |
""" |
|
for key, value in data.items(): |
|
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if isinstance(value, Color): |
|
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i.append((_("%s: %s") % (key, color_string(value)), value)) |
|
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else: |
|
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i.append(_("%s: %s") % (key, value)) |
|
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items.append((_("%s") % name, i)) |
|
| 407 |
|
|
| 408 |
for p in self.ranges: |
assert isinstance(color, Color) |
| 409 |
i = [] |
#self.stroke = Color(color.red, color.green, color.blue) |
| 410 |
data = p[RANGE_DATA] |
self.stroke = copy.copy(color) |
| 411 |
for key, value in data.items(): |
|
| 412 |
if isinstance(value, Color): |
def GetLineWidth(self): |
| 413 |
i.append((_("%s: %s") % (key, color_string(value)), value)) |
"""Return the line width.""" |
| 414 |
else: |
return self.strokeWidth |
| 415 |
i.append(_("%s: %s") % (key, value)) |
|
| 416 |
items.append((_("%s-%s") % (p[RANGE_MIN], p[RANGE_MAX], i))) |
def SetLineWidth(self, lineWidth): |
| 417 |
|
"""Set the line width. |
| 418 |
return (_("Classifications"), items) |
|
| 419 |
|
lineWidth -- the new line width. This must be > 0. |
| 420 |
|
""" |
| 421 |
|
assert isinstance(lineWidth, IntType) |
| 422 |
|
if (lineWidth < 1): |
| 423 |
|
raise ValueError(_("lineWidth < 1")) |
| 424 |
|
|
| 425 |
|
self.strokeWidth = lineWidth |
| 426 |
|
|
| 427 |
|
def GetFill(self): |
| 428 |
|
"""Return the fill color as a Color object.""" |
| 429 |
|
return self.fill |
| 430 |
|
|
| 431 |
|
def SetFill(self, fill): |
| 432 |
|
"""Set the fill color. |
| 433 |
|
|
| 434 |
|
fill -- the color of the fill. This must be a Color object. |
| 435 |
|
""" |
| 436 |
|
|
| 437 |
|
assert isinstance(fill, Color) |
| 438 |
|
self.fill = copy.copy(fill) |
| 439 |
|
#self.fill = Color(fill.red, fill.green, fill.blue) |
| 440 |
|
|
| 441 |
|
def __eq__(self, other): |
| 442 |
|
"""Return true if 'props' has the same attributes as this class""" |
| 443 |
|
|
| 444 |
|
return isinstance(other, ClassGroupProperties) \ |
| 445 |
|
and self.stroke == other.GetLineColor() \ |
| 446 |
|
and self.strokeWidth == other.GetLineWidth() \ |
| 447 |
|
and self.fill == other.GetFill() |
| 448 |
|
|
| 449 |
|
def __ne__(self, other): |
| 450 |
|
return not self.__eq__(other) |
| 451 |
|
|
| 452 |
|
def __copy__(self): |
| 453 |
|
return ClassGroupProperties(self) |
| 454 |
|
|
| 455 |
|
def __deepcopy__(self): |
| 456 |
|
return ClassGroupProperties(self) |
| 457 |
|
|
| 458 |
|
class ClassGroup: |
| 459 |
|
"""A base class for all Groups within a Classification""" |
| 460 |
|
|
| 461 |
|
def __init__(self, label = ""): |
| 462 |
|
"""Constructor. |
| 463 |
|
|
| 464 |
|
label -- A string representing the Group's label |
| 465 |
|
""" |
| 466 |
|
|
| 467 |
|
self.label = None |
| 468 |
|
|
| 469 |
|
self.SetLabel(label) |
| 470 |
|
|
| 471 |
|
def GetLabel(self): |
| 472 |
|
"""Return the Group's label.""" |
| 473 |
|
return self.label |
| 474 |
|
|
| 475 |
|
def SetLabel(self, label): |
| 476 |
|
"""Set the Group's label. |
| 477 |
|
|
| 478 |
|
label -- a string representing the Group's label. This must |
| 479 |
|
not be None. |
| 480 |
|
""" |
| 481 |
|
assert isinstance(label, StringType) |
| 482 |
|
self.label = label |
| 483 |
|
|
| 484 |
|
def GetDisplayText(self): |
| 485 |
|
assert False, "GetDisplay must be overridden by subclass!" |
| 486 |
|
return "" |
| 487 |
|
|
| 488 |
|
def Matches(self, value): |
| 489 |
|
"""Determines if this Group is associated with the given value. |
| 490 |
|
|
| 491 |
|
Returns False. This needs to be overridden by all subclasses. |
| 492 |
|
""" |
| 493 |
|
assert False, "GetMatches must be overridden by subclass!" |
| 494 |
|
return False |
| 495 |
|
|
| 496 |
|
def GetProperties(self): |
| 497 |
|
"""Return the properties associated with the given value. |
| 498 |
|
|
| 499 |
|
Returns None. This needs to be overridden by all subclasses. |
| 500 |
|
""" |
| 501 |
|
assert False, "GetProperties must be overridden by subclass!" |
| 502 |
|
return None |
| 503 |
|
|
| 504 |
|
|
| 505 |
|
class ClassGroupSingleton(ClassGroup): |
| 506 |
|
"""A Group that is associated with a single value.""" |
| 507 |
|
|
| 508 |
|
def __init__(self, value = 0, prop = None, label = ""): |
| 509 |
|
"""Constructor. |
| 510 |
|
|
| 511 |
|
value -- the associated value. |
| 512 |
|
|
| 513 |
|
prop -- a ClassGroupProperites object. If prop is None a default |
| 514 |
|
set of properties is created. |
| 515 |
|
|
| 516 |
|
label -- a label for this group. |
| 517 |
|
""" |
| 518 |
|
ClassGroup.__init__(self, label) |
| 519 |
|
|
| 520 |
|
self.prop = None |
| 521 |
|
self.value = None |
| 522 |
|
|
| 523 |
|
self.SetValue(value) |
| 524 |
|
self.SetProperties(prop) |
| 525 |
|
|
| 526 |
|
def __copy__(self): |
| 527 |
|
return ClassGroupSingleton(self.GetValue(), |
| 528 |
|
self.GetProperties(), |
| 529 |
|
self.GetLabel()) |
| 530 |
|
|
| 531 |
|
def __deepcopy__(self, memo): |
| 532 |
|
return ClassGroupSingleton(copy.copy(self.GetValue()), |
| 533 |
|
copy.copy(self.GetProperties()), |
| 534 |
|
copy.copy(self.GetLabel())) |
| 535 |
|
|
| 536 |
|
def GetValue(self): |
| 537 |
|
"""Return the associated value.""" |
| 538 |
|
return self.value |
| 539 |
|
|
| 540 |
|
def SetValue(self, value): |
| 541 |
|
"""Associate this Group with the given value.""" |
| 542 |
|
self.value = value |
| 543 |
|
|
| 544 |
|
def Matches(self, value): |
| 545 |
|
"""Determine if the given value matches the associated Group value.""" |
| 546 |
|
|
| 547 |
|
"""Returns True if the value matches, False otherwise.""" |
| 548 |
|
|
| 549 |
|
return self.value == value |
| 550 |
|
|
| 551 |
|
def GetProperties(self): |
| 552 |
|
"""Return the Properties associated with this Group.""" |
| 553 |
|
|
| 554 |
|
return self.prop |
| 555 |
|
|
| 556 |
|
def SetProperties(self, prop): |
| 557 |
|
"""Set the properties associated with this Group. |
| 558 |
|
|
| 559 |
|
prop -- a ClassGroupProperties object. if prop is None, |
| 560 |
|
a default set of properties is created. |
| 561 |
|
""" |
| 562 |
|
|
| 563 |
|
if prop is None: prop = ClassGroupProperties() |
| 564 |
|
assert isinstance(prop, ClassGroupProperties) |
| 565 |
|
self.prop = prop |
| 566 |
|
|
| 567 |
|
def GetDisplayText(self): |
| 568 |
|
label = self.GetLabel() |
| 569 |
|
|
| 570 |
|
if label != "": return label |
| 571 |
|
|
| 572 |
|
return str(self.GetValue()) |
| 573 |
|
|
| 574 |
|
def __eq__(self, other): |
| 575 |
|
return isinstance(other, ClassGroupSingleton) \ |
| 576 |
|
and self.GetProperties() == other.GetProperties() \ |
| 577 |
|
and self.GetValue() == other.GetValue() |
| 578 |
|
|
| 579 |
|
def __ne__(self, other): |
| 580 |
|
return not self.__eq__(other) |
| 581 |
|
|
| 582 |
|
class ClassGroupDefault(ClassGroup): |
| 583 |
|
"""The default Group. When values do not match any other |
| 584 |
|
Group within a Classification, the properties from this |
| 585 |
|
class are used.""" |
| 586 |
|
|
| 587 |
|
def __init__(self, prop = None, label = ""): |
| 588 |
|
"""Constructor. |
| 589 |
|
|
| 590 |
|
prop -- a ClassGroupProperites object. If prop is None a default |
| 591 |
|
set of properties is created. |
| 592 |
|
|
| 593 |
|
label -- a label for this group. |
| 594 |
|
""" |
| 595 |
|
|
| 596 |
|
ClassGroup.__init__(self, label) |
| 597 |
|
self.SetProperties(prop) |
| 598 |
|
|
| 599 |
|
def __copy__(self): |
| 600 |
|
return ClassGroupDefault(self.GetProperties(), self.GetLabel()) |
| 601 |
|
|
| 602 |
|
def __deepcopy__(self, memo): |
| 603 |
|
return ClassGroupDefault(copy.copy(self.GetProperties()), |
| 604 |
|
copy.copy(self.GetLabel())) |
| 605 |
|
|
| 606 |
|
def Matches(self, value): |
| 607 |
|
return True |
| 608 |
|
|
| 609 |
|
def GetProperties(self): |
| 610 |
|
"""Return the Properties associated with this Group.""" |
| 611 |
|
return self.prop |
| 612 |
|
|
| 613 |
|
def SetProperties(self, prop): |
| 614 |
|
"""Set the properties associated with this Group. |
| 615 |
|
|
| 616 |
|
prop -- a ClassGroupProperties object. if prop is None, |
| 617 |
|
a default set of properties is created. |
| 618 |
|
""" |
| 619 |
|
|
| 620 |
|
if prop is None: prop = ClassGroupProperties() |
| 621 |
|
assert isinstance(prop, ClassGroupProperties) |
| 622 |
|
self.prop = prop |
| 623 |
|
|
| 624 |
|
def GetDisplayText(self): |
| 625 |
|
label = self.GetLabel() |
| 626 |
|
|
| 627 |
|
if label != "": return label |
| 628 |
|
|
| 629 |
|
return "DEFAULT" |
| 630 |
|
|
| 631 |
|
def __eq__(self, other): |
| 632 |
|
return isinstance(other, ClassGroupDefault) \ |
| 633 |
|
and self.GetProperties() == other.GetProperties() |
| 634 |
|
|
| 635 |
|
def __ne__(self, other): |
| 636 |
|
return not self.__eq__(other) |
| 637 |
|
|
| 638 |
|
class ClassGroupRange(ClassGroup): |
| 639 |
|
"""A Group that represents a range of values that map to the same |
| 640 |
|
set of properties.""" |
| 641 |
|
|
| 642 |
|
def __init__(self, min = 0, max = 1, prop = None, label = ""): |
| 643 |
|
"""Constructor. |
| 644 |
|
|
| 645 |
|
The minumum value must be strictly less than the maximum. |
| 646 |
|
|
| 647 |
|
min -- the minimum range value |
| 648 |
|
|
| 649 |
|
max -- the maximum range value |
| 650 |
|
|
| 651 |
|
prop -- a ClassGroupProperites object. If prop is None a default |
| 652 |
|
set of properties is created. |
| 653 |
|
|
| 654 |
|
label -- a label for this group. |
| 655 |
|
""" |
| 656 |
|
|
| 657 |
|
ClassGroup.__init__(self, label) |
| 658 |
|
|
| 659 |
|
self.min = self.max = 0 |
| 660 |
|
self.prop = None |
| 661 |
|
|
| 662 |
|
self.SetRange(min, max) |
| 663 |
|
self.SetProperties(prop) |
| 664 |
|
|
| 665 |
|
def __copy__(self): |
| 666 |
|
return ClassGroupRange(self.GetMin(), |
| 667 |
|
self.GetMax(), |
| 668 |
|
self.GetProperties(), |
| 669 |
|
self.GetLabel()) |
| 670 |
|
|
| 671 |
|
def __deepcopy__(self, memo): |
| 672 |
|
return ClassGroupRange(copy.copy(self.GetMin()), |
| 673 |
|
copy.copy(self.GetMax()), |
| 674 |
|
copy.copy(self.GetProperties()), |
| 675 |
|
copy.copy(self.GetLabel())) |
| 676 |
|
|
| 677 |
|
def GetMin(self): |
| 678 |
|
"""Return the range's minimum value.""" |
| 679 |
|
return self.min |
| 680 |
|
|
| 681 |
|
def SetMin(self, min): |
| 682 |
|
"""Set the range's minimum value. |
| 683 |
|
|
| 684 |
|
min -- the new minimum. Note that this must be less than the current |
| 685 |
|
maximum value. Use SetRange() to change both min and max values. |
| 686 |
|
""" |
| 687 |
|
|
| 688 |
|
self.SetRange(min, self.max) |
| 689 |
|
|
| 690 |
|
def GetMax(self): |
| 691 |
|
"""Return the range's maximum value.""" |
| 692 |
|
return self.max |
| 693 |
|
|
| 694 |
|
def SetMax(self, max): |
| 695 |
|
"""Set the range's maximum value. |
| 696 |
|
|
| 697 |
|
max -- the new maximum. Note that this must be greater than the current |
| 698 |
|
minimum value. Use SetRange() to change both min and max values. |
| 699 |
|
""" |
| 700 |
|
self.SetRange(self.min, max) |
| 701 |
|
|
| 702 |
|
def SetRange(self, min, max): |
| 703 |
|
"""Set a new range. |
| 704 |
|
|
| 705 |
|
Note that min must be strictly less than max. |
| 706 |
|
|
| 707 |
|
min -- the new minimum value |
| 708 |
|
min -- the new maximum value |
| 709 |
|
""" |
| 710 |
|
|
| 711 |
|
if min >= max: |
| 712 |
|
raise ValueError(_("ClassGroupRange: %i(min) >= %i(max)!") % |
| 713 |
|
(min, max)) |
| 714 |
|
self.min = min |
| 715 |
|
self.max = max |
| 716 |
|
|
| 717 |
|
def GetRange(self): |
| 718 |
|
"""Return the range as a tuple (min, max)""" |
| 719 |
|
return (self.min, self.max) |
| 720 |
|
|
| 721 |
|
def Matches(self, value): |
| 722 |
|
"""Determine if the given value lies with the current range. |
| 723 |
|
|
| 724 |
|
The following check is used: min <= value < max. |
| 725 |
|
""" |
| 726 |
|
|
| 727 |
|
return self.min <= value < self.max |
| 728 |
|
|
| 729 |
|
def GetProperties(self): |
| 730 |
|
"""Return the Properties associated with this Group.""" |
| 731 |
|
return self.prop |
| 732 |
|
|
| 733 |
|
def SetProperties(self, prop): |
| 734 |
|
"""Set the properties associated with this Group. |
| 735 |
|
|
| 736 |
|
prop -- a ClassGroupProperties object. if prop is None, |
| 737 |
|
a default set of properties is created. |
| 738 |
|
""" |
| 739 |
|
if prop is None: prop = ClassGroupProperties() |
| 740 |
|
assert isinstance(prop, ClassGroupProperties) |
| 741 |
|
self.prop = prop |
| 742 |
|
|
| 743 |
|
def GetDisplayText(self): |
| 744 |
|
label = self.GetLabel() |
| 745 |
|
|
| 746 |
|
if label != "": return label |
| 747 |
|
|
| 748 |
|
return _("%s - %s") % (self.GetMin(), self.GetMax()) |
| 749 |
|
|
| 750 |
|
def __eq__(self, other): |
| 751 |
|
return isinstance(other, ClassGroupRange) \ |
| 752 |
|
and self.GetProperties() == other.GetProperties() \ |
| 753 |
|
and self.GetRange() == other.GetRange() |
| 754 |
|
|
| 755 |
|
def __ne__(self, other): |
| 756 |
|
return not self.__eq__(other) |
| 757 |
|
|
| 758 |
|
class ClassGroupMap(ClassGroup): |
| 759 |
|
"""Currently, this class is not used.""" |
| 760 |
|
|
| 761 |
|
FUNC_ID = "id" |
| 762 |
|
|
| 763 |
|
def __init__(self, map_type = FUNC_ID, func = None, prop = None, label=""): |
| 764 |
|
ClassGroup.__init__(self, label) |
| 765 |
|
|
| 766 |
|
self.map_type = map_type |
| 767 |
|
self.func = func |
| 768 |
|
|
| 769 |
|
if self.func is None: |
| 770 |
|
self.func = func_id |
| 771 |
|
|
| 772 |
|
def Map(self, value): |
| 773 |
|
return self.func(value) |
| 774 |
|
|
| 775 |
|
def GetProperties(self): |
| 776 |
|
return None |
| 777 |
|
|
| 778 |
|
def GetPropertiesFromValue(self, value): |
| 779 |
|
pass |
| 780 |
|
|
| 781 |
|
def GetDisplayText(self): |
| 782 |
|
return "Map: " + self.map_type |
| 783 |
|
|
| 784 |
|
# |
| 785 |
|
# built-in mappings |
| 786 |
|
# |
| 787 |
|
def func_id(value): |
| 788 |
|
return value |
| 789 |
|
|
Parent Directory
| 
Revision Log
| 
Patch