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Viewing changes to enthought/chaco/base_data_range.py

  • Committer: Bazaar Package Importer
  • Author(s): Varun Hiremath
  • Date: 2008-12-29 02:34:05 UTC
  • Revision ID: james.westby@ubuntu.com-20081229023405-x7i4kp9mdxzmdnvu
Tags: upstream-3.0.1
Import upstream version 3.0.1

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enthought/chaco/base_data_range.py
 
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"""
 
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Defines the BaseDataRange class.
 
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"""
 
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# Local relative imports
 
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from abstract_data_range import AbstractDataRange
 
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class BaseDataRange(AbstractDataRange):
 
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    """ Ranges represent sub-regions of data space.  
 
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    They support "autoscaling" by querying their associated data sources.
 
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    """
 
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    #------------------------------------------------------------------------
 
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    # Public methods
 
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    #------------------------------------------------------------------------
 
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    def __init__(self, *datasources, **kwtraits):
 
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        super(AbstractDataRange, self).__init__(**kwtraits)
 
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        if len(datasources) > 0:
 
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            self.sources.extend(datasources)
 
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    def add(self, *datasources):
 
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        """ Convenience method to add a data source. """
 
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        for datasource in datasources:
 
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            if datasource not in self.sources:        
 
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                self.sources.append(datasource)
 
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    def remove(self, *datasources):
 
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        """ Convenience method to remove a data source. """
 
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        for datasource in datasources:
 
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            if datasource in self.sources:
 
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                self.sources.remove(datasource)
 
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