double.cpp

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/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * 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 St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include <assert.h>

#include <QDoubleSpinBox>

#include "double.hpp"

using boost::optional;
using std::pair;

namespace pv {
namespace prop {

Double::Double(QString name,
    int decimals,
    QString suffix,
    optional< pair<double, double> > range,
    optional<double> step,
    Getter getter,
    Setter setter) :
    Property(name, getter, setter),
    decimals_(decimals),
    suffix_(suffix),
    range_(range),
    step_(step),
    spin_box_(nullptr)
{
}

Double::~Double()
{
}

QWidget* Double::get_widget(QWidget *parent, bool auto_commit)
{
    if (spin_box_)
        return spin_box_;

    if (!getter_)
        return nullptr;

    Glib::VariantBase variant = getter_();
    if (!variant.gobj())
        return nullptr;

    double value = Glib::VariantBase::cast_dynamic<Glib::Variant<double>>(
        variant).get();

    spin_box_ = new QDoubleSpinBox(parent);
    spin_box_->setDecimals(decimals_);
    spin_box_->setSuffix(suffix_);
    if (range_)
        spin_box_->setRange(range_->first, range_->second);
    if (step_)
        spin_box_->setSingleStep(*step_);

    spin_box_->setValue(value);

    if (auto_commit)
        connect(spin_box_, SIGNAL(valueChanged(double)),
            this, SLOT(on_value_changed(double)));

    return spin_box_;
}

void Double::commit()
{
    assert(setter_);

    if (!spin_box_)
        return;

    setter_(Glib::Variant<double>::create(spin_box_->value()));
}

void Double::on_value_changed(double)
{
    commit();
}

} // prop
} // pv