AbaKus – a complex calculator
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/*
* valuemanager.cpp - part of abakus
* Copyright (C) 2004, 2005 Michael Pyne <michael.pyne@kdemail.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <kdebug.h>
#include <klocale.h>
#include <tqregexp.h>
#include "numerictypes.h"
#include "valuemanager.h"
ValueManager *ValueManager::m_manager = 0;
ValueManager *ValueManager::instance()
{
if(!m_manager)
m_manager = new ValueManager;
return m_manager;
}
ValueManager::ValueManager(TQObject *parent, const char *name) :
TQObject(parent, name)
{
m_values.insert("pi", Abakus::number_t::PI);
m_values.insert("e", Abakus::number_t::E);
}
Abakus::number_t ValueManager::value(const TQString &name) const
{
return m_values[name];
}
bool ValueManager::isValueSet(const TQString &name) const
{
return m_values.contains(name);
}
bool ValueManager::isValueReadOnly(const TQString &name) const
{
TQRegExp readOnlyValues("^(ans|pi|e|stackCount)$");
return name.find(readOnlyValues) != -1;
}
void ValueManager::setValue(const TQString &name, const Abakus::number_t value)
{
if(m_values.contains(name) && this->value(name) != value)
emit signalValueChanged(name, value);
else if(!m_values.contains(name))
emit signalValueAdded(name, value);
m_values.replace(name, value);
}
void ValueManager::removeValue(const TQString &name)
{
if(m_values.contains(name))
emit signalValueRemoved(name);
m_values.remove(name);
}
void ValueManager::slotRemoveUserVariables()
{
TQStringList vars = valueNames();
for(TQStringList::ConstIterator var = vars.constBegin(); var != vars.constEnd(); ++var)
if(!isValueReadOnly(*var))
removeValue(*var);
}
TQStringList ValueManager::valueNames() const
{
return m_values.keys();
}
TQString ValueManager::description(const TQString &valueName)
{
if(valueName == "e")
return i18n("Natural exponential base - 2.7182818");
if(valueName == "pi")
return i18n("pi (π) - 3.1415926");
return TQString();
}
#include "valuemanager.moc"
// vim: set et ts=8 sw=4 encoding=utf-8: