/*
 * Copyright 2008 Ben Boeckel <MathStuf@gmail.com>
 * 
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

// Header include
#include "FractionWidget.h"

Sigmodr::FractionWidget::FractionWidget(QWidget* parent, const Sigcore::Fraction& value) :
        QWidget(parent),
        m_behavior(Any),
        m_value(value)
{
    setupUi(this);
    connect(this, SIGNAL(valueChanged(Sigcore::Fraction)), SLOT(updateValue()));
    connect(this, SIGNAL(valueChanged(Sigcore::Fraction)), SLOT(resetRanges()));
    connect(this, SIGNAL(behaviorChanged(const Behavior)), SLOT(resetRanges()));
    resetRanges();
}

Sigmodr::FractionWidget::Behavior Sigmodr::FractionWidget::behavior() const
{
    return m_behavior;
}

Sigcore::Fraction Sigmodr::FractionWidget::value() const
{
    return m_value;
}

void Sigmodr::FractionWidget::setBehavior(const Behavior behavior)
{
    m_behavior = behavior;
    emit(behaviorChanged(m_behavior));
}

void Sigmodr::FractionWidget::setValue(const Sigcore::Fraction& value)
{
    if (!varValue->text().isEmpty() && (m_value == value))
        return;
    m_value = value;
    emit(valueChanged(m_value));
}

void Sigmodr::FractionWidget::updateValue()
{
    varValue->setText(QString::number(double(m_value), 'g', 7));
}

void Sigmodr::FractionWidget::on_varNumerator_valueChanged(const int numerator)
{
    m_value.setNumerator(numerator);
    emit(valueChanged(m_value));
}

void Sigmodr::FractionWidget::on_varDenominator_valueChanged(const int denominator)
{
    m_value.setDenominator(denominator);
    emit(valueChanged(m_value));
}

void Sigmodr::FractionWidget::resetRanges()
{
    varNumerator->setValue(m_value.numerator());
    varDenominator->setValue(m_value.denominator());
    int numMin = 0;
    int numMax = INT_MAX;
    int denomMin = 1;
    int denomMax = INT_MAX;
    switch (m_behavior)
    {
        case NonZero:
            numMin = 1;
        case Proper:
            numMax = m_value.denominator();
            break;
        case Improper:
            denomMax = m_value.numerator();
        case AnyButZero:
            numMin = 1;
        default:
            break;
    }
    varNumerator->setRange(numMin, numMax);
    varDenominator->setRange(denomMin, denomMax);
}