int.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, see <http://www.gnu.org/licenses/>.
 */

#include <cassert>
#include <cstdint>

#include <QDebug>
#include <QSpinBox>

#include <libsigrokcxx/libsigrokcxx.hpp>

#include "int.hpp"

using boost::optional;
using std::max;
using std::min;
using std::pair;

namespace pv {
namespace prop {

Int::Int(QString name, QString desc, QString suffix,
    optional< pair<int64_t, int64_t> > range, Getter getter, Setter setter,
    QString special_value_text) :
    Property(name, desc, getter, setter),
    suffix_(suffix),
    special_value_text_(special_value_text),
    range_(range),
    spin_box_(nullptr)
{
}

QWidget* Int::get_widget(QWidget *parent, bool auto_commit)
{
    int64_t range_min = 0;
    uint64_t range_max = 0;

    if (spin_box_)
        return spin_box_;

    if (!getter_)
        return nullptr;

    try {
        value_ = getter_();
    } catch (const sigrok::Error &e) {
        qWarning() << tr("Querying config key %1 resulted in %2").arg(name_, e.what());
        return nullptr;
    }

    GVariant *value = value_.gobj();
    if (!value)
        return nullptr;

    spin_box_ = new QSpinBox(parent);
    spin_box_->setSuffix(suffix_);
    spin_box_->setSpecialValueText(special_value_text_);

    const GVariantType *const type = g_variant_get_type(value);
    assert(type);

    if (g_variant_type_equal(type, G_VARIANT_TYPE_BYTE)) {
        range_min = 0, range_max = UINT8_MAX;
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT16)) {
        range_min = INT16_MIN, range_max = INT16_MAX;
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT16)) {
        range_min = 0, range_max = UINT16_MAX;
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT32)) {
        range_min = INT32_MIN, range_max = INT32_MAX;
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT32)) {
        range_min = 0, range_max = UINT32_MAX;
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT64)) {
        range_min = INT64_MIN, range_max = INT64_MAX;
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT64)) {
        range_min = 0, range_max = UINT64_MAX;
    } else {
        // Unexpected value type.
        assert(false);
    }

    // @todo sigrok supports 64-bit quantities, but Qt does not have a
    // standard widget to allow the values to be modified over the full
    // 64-bit range on 32-bit machines. To solve the issue we need a
    // custom widget.

    range_min = max(range_min, (int64_t)INT_MIN);
    range_max = min(range_max, (uint64_t)INT_MAX);

    if (range_)
        spin_box_->setRange((int)range_->first, (int)range_->second);
    else
        spin_box_->setRange((int)range_min, (int)range_max);

    update_widget();

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

    return spin_box_;
}

void Int::update_widget()
{
    if (!spin_box_)
        return;

    try {
        value_ = getter_();
    } catch (const sigrok::Error &e) {
        qWarning() << tr("Querying config key %1 resulted in %2").arg(name_, e.what());
        return;
    }

    GVariant *value = value_.gobj();
    assert(value);

    const GVariantType *const type = g_variant_get_type(value);
    assert(type);

    int64_t int_val = 0;

    if (g_variant_type_equal(type, G_VARIANT_TYPE_BYTE)) {
        int_val = g_variant_get_byte(value);
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT16)) {
        int_val = g_variant_get_int16(value);
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT16)) {
        int_val = g_variant_get_uint16(value);
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT32)) {
        int_val = g_variant_get_int32(value);
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT32)) {
        int_val = g_variant_get_uint32(value);
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT64)) {
        int_val = g_variant_get_int64(value);
    } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT64)) {
        int_val = g_variant_get_uint64(value);
    } else {
        // Unexpected value type.
        assert(false);
    }

    spin_box_->setValue((int)int_val);
}

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

    if (!spin_box_)
        return;

    GVariant *new_value = nullptr;
    const GVariantType *const type = g_variant_get_type(value_.gobj());
    assert(type);

    if (g_variant_type_equal(type, G_VARIANT_TYPE_BYTE))
        new_value = g_variant_new_byte(spin_box_->value());
    else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT16))
        new_value = g_variant_new_int16(spin_box_->value());
    else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT16))
        new_value = g_variant_new_uint16(spin_box_->value());
    else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT32))
        new_value = g_variant_new_int32(spin_box_->value());
    else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT32))
        new_value = g_variant_new_uint32(spin_box_->value());
    else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT64))
        new_value = g_variant_new_int64(spin_box_->value());
    else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT64))
        new_value = g_variant_new_uint64(spin_box_->value());
    else {
        // Unexpected value type.
        assert(false);
    }

    assert(new_value);

    value_ = Glib::VariantBase(new_value);

    setter_(value_);
}

void Int::on_value_changed(int)
{
    commit();
}

}  // namespace prop
}  // namespace pv