#!/usr/bin/env python
# -*- Mode: python -*-
#======================================================================
# FILE: Collection.py
# CREATOR: eric
#
# DESCRIPTION:
#
#
# $Id$
# $Locker$
#
# (C) COPYRIGHT 2001, Eric Busboom <eric@softwarestudio.org>
# (C) COPYRIGHT 2001, Patrick Lewis <plewis@inetarena.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of either:
#
# The LGPL as published by the Free Software Foundation, version
# 2.1, available at: http://www.fsf.org/copyleft/lesser.html
#
# Or:
#
# The Mozilla Public License Version 1.0. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#======================================================================
from types import *
class Collection:
"""A group of components that can be modified somewhat like a list.
Usage:
Collection(componet, propSequence)
component is a Component object
propSequence is a list or tuple of Property (or subclass of Property)
of objects already in component
"""
def __init__(self, component, propSequence):
self._properties = list(propSequence[:])
self._component = component
def __getslice__(self, beg, end):
return Collection(self._component, self._properties[beg:end])
def __setslice__(self, beg, end, sequence):
if not isinstance(sequence,ListType):
raise TypeError, "must assign list (not instance) to slice"
oldProps = self._properties[beg:end]
for p in oldProps:
self._component.remove_property(p)
self._properties[beg:end] = sequence
for p in sequence:
self._component.add_property(p)
def __getitem__(self, i):
return self._properties[i]
def __setitem__(self, i, prop):
self._component.remove_property(self._properties[i])
self._component.add_property(prop)
self._properties[i]=prop
def __delitem__(self, i):
self._component.remove_property(self._properties[i])
del self._properties[i]
def __len__(self):
return len(self._properties)
def __str__(self):
s = "[ "
if len(self._properties) > 0:
s = s + str(self._properties[0])
for p in self._properties[1:]:
s = "%s, %s" % (s, p)
s = s + " ]"
return s
def append(self, property):
self._properties.append(property)
self._component.add_property(property)
class ComponentCollection:
def __init__(self, parent, componentSequence):
self._parent = parent
self._components = list(componentSequence[:])
def __getslice__(self, beg, end):
return ComponentCollection(self._parent, self._components[beg:end])
def __setslice__(self, beg, end, sequence):
oldComps = self._components[beg:end]
self._components.__setslice__(beg, end, sequence)
for c in sequence:
self._components.addComponent(c)
for c in oldComps:
self._parent.remove_component(c)
def __getitem__(self, i):
return self._components[i]
def __setitem__(self, i, prop):
self._parent.remove_component(self._components[i])
self._parent.add_property(prop)
self._components[i]=prop
def __delitem__(self, i):
self._parent.remove_componet(self._components[i])
del self._components[i]
def __len__(self):
return len(self._components)
def append(self, property):
self._components.append(property)
self._parent.addComponent(property)
