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#!/usr/bin/env python3
#****************************************************************************
# recentunits.py, provides a list of recently used units
#
# ConvertAll, a units conversion program
# Copyright (C) 2014, Douglas W. Bell
#
# This is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License, either Version 2 or any later
# version. This program is distributed in the hope that it will be useful,
# but WITTHOUT ANY WARRANTY. See the included LICENSE file for details.
#*****************************************************************************
class RecentUnits(list):
"""A list of recent unit combo names.
"""
def __init__(self, options):
list.__init__(self)
self.options = options
self.updateQuantity()
self.loadList()
def updateQuantity(self):
"""Update number of entries from options.
"""
self.numEntries = self.options.intData('RecentUnits', 0, 99)
del self[self.numEntries:]
def loadList(self):
"""Load recent units from option file.
"""
self[:] = []
for num in range(self.numEntries):
name = self.options.strData(self.optionTitle(num), True)
if name:
self.append(name)
def writeList(self):
"""Write list of paths to options.
"""
for num in range(self.numEntries):
try:
name = self[num]
except IndexError:
name = ''
self.options.changeData(self.optionTitle(num), name, True)
self.options.writeChanges()
def addEntry(self, name):
"""Move name to start if found, otherwise add it.
"""
try:
self.remove(name)
except ValueError:
pass
self.insert(0, name)
del self[self.numEntries:]
def optionTitle(self, num):
"""Return option key for the given nummber.
"""
return 'RecentUnit{0}'.format(num + 1)
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