/*  This file is part of the KDE project

    Copyright (C) 2006-2007 Matthias Kretz <kretz@kde.org>

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) version 3, or any

    later version accepted by the membership of KDE e.V. (or its

    successor approved by the membership of KDE e.V.), Nokia Corporation

    (or its successors, if any) and the KDE Free Qt Foundation, which shall

    act as a proxy defined in Section 6 of version 3 of the license.

    This library 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

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "effectwidget.h"

#include "effectwidget_p.h"

#include <QtCore/QtAlgorithms>

#include <QtCore/QList>

#include "effect.h"

#include "effectparameter.h"

#include "phonondefs_p.h"

#include <QtGui/QBoxLayout>

#include <QtGui/QLabel>

#include <QtGui/QSpinBox>

#include <QtGui/QCheckBox>

#include <QtGui/QComboBox>

#include <QtGui/QSlider>

#include <limits>

#ifdef min

#undef min

#endif

#ifdef max

#undef max

#endif

static const qreal DEFAULT_MIN = std::numeric_limits<qreal>::min();

static const qreal DEFAULT_MAX = std::numeric_limits<qreal>::max();

static const int DEFAULT_MIN_INT = std::numeric_limits<int>::min();

static const int DEFAULT_MAX_INT = std::numeric_limits<int>::max();

static const int SLIDER_RANGE = 8;

static const int TICKINTERVAL = 4;

QT_BEGIN_NAMESPACE

#ifndef QT_NO_PHONON_EFFECTWIDGET

namespace Phonon

{

EffectWidget::EffectWidget(Effect *effect, QWidget *parent)

    : QWidget(parent),

    k_ptr(new EffectWidgetPrivate(effect))

{

    K_D(EffectWidget);

    d->q_ptr = this;

    d->autogenerateUi();

}

EffectWidget::~EffectWidget()

{

    delete k_ptr;

}

/*

EffectWidget::EffectWidget(EffectWidgetPrivate &dd, QWidget *parent)

    : QWidget(parent)

    , k_ptr(&dd)

{

    K_D(EffectWidget);

    d->q_ptr = this;

    d->autogenerateUi();

}

*/

EffectWidgetPrivate::EffectWidgetPrivate(Effect *e)

    : effect(e)

{

    //TODO: look up whether there is a specialized widget for this effect. This

    //could be a DSO or a Designer ui file found via KTrader.

    //

    //if no specialized widget is available:

}

void EffectWidgetPrivate::autogenerateUi()

{

    Q_Q(EffectWidget);

    QVBoxLayout *mainLayout = new QVBoxLayout(q);

    mainLayout->setMargin(0);

    const QList<Phonon::EffectParameter> parameters = effect->parameters();

    for (int i = 0; i < parameters.count(); ++i) {

        const EffectParameter &para = parameters.at(i);

        QVariant value = effect->parameterValue(para);

        QHBoxLayout *pLayout = new QHBoxLayout;

        mainLayout->addLayout(pLayout);

        QLabel *label = new QLabel(q);

        pLayout->addWidget(label);

        label->setText(para.name());

#ifndef QT_NO_TOOLTIP

        label->setToolTip(para.description());

#endif

        QWidget *control = 0;

        switch (int(para.type())) {

        case QVariant::String:

            {

                QComboBox *cb = new QComboBox(q);

                control = cb;

                if (value.type() == QVariant::Int) {

                    //value just defines the item index

                    for (int i = 0; i < para.possibleValues().count(); ++i) {

                        cb->addItem(para.possibleValues().at(i).toString());

                    }

                    cb->setCurrentIndex(value.toInt());

                    QObject::connect(cb, SIGNAL(currentIndexChanged(int)), q, SLOT(_k_setIntParameter(int)));

                } else {

                    for (int i = 0; i < para.possibleValues().count(); ++i) {

                        const QVariant &item = para.possibleValues().at(i);

                        cb->addItem(item.toString());

                        if (item == value) {

                            cb->setCurrentIndex(cb->count() - 1);

                        }

                    }

                    QObject::connect(cb, SIGNAL(currentIndexChanged(QString)), q, SLOT(_k_setStringParameter(QString)));

                }

            }

            break;

        case QVariant::Bool:

            {

                QCheckBox *cb = new QCheckBox(q);

                control = cb;

                cb->setChecked(value.toBool());

                QObject::connect(cb, SIGNAL(toggled(bool)), q, SLOT(_k_setToggleParameter(bool)));

            }

            break;

        case QVariant::Int:

            {

                QSpinBox *sb = new QSpinBox(q);

                control = sb;

                bool minValueOk = false;

                bool maxValueOk = false;

                const int minValue = para.minimumValue().toInt(&minValueOk);

                const int maxValue = para.maximumValue().toInt(&maxValueOk);

                sb->setRange(minValueOk ? minValue : DEFAULT_MIN_INT, maxValueOk ? maxValue : DEFAULT_MAX_INT);

                sb->setValue(value.toInt());

                QObject::connect(sb, SIGNAL(valueChanged(int)), q, SLOT(_k_setIntParameter(int)));

            }

            break;

        case QMetaType::Float:

        case QVariant::Double:

            {

                const qreal minValue = para.minimumValue().canConvert(QVariant::Double) ?

                    para.minimumValue().toReal() : DEFAULT_MIN;

                const qreal maxValue = para.maximumValue().canConvert(QVariant::Double) ?

                    para.maximumValue().toReal() : DEFAULT_MAX;

                if (minValue == -1. && maxValue == 1.) {

                    //Special case values between -1 and 1.0 to use a slider for improved usability

                    QSlider *slider = new QSlider(Qt::Horizontal, q);

                    control = slider;

                    slider->setRange(-SLIDER_RANGE, +SLIDER_RANGE);

                    slider->setValue(int(SLIDER_RANGE * value.toReal()));

                    slider->setTickPosition(QSlider::TicksBelow);

                    slider->setTickInterval(TICKINTERVAL);

                    QObject::connect(slider, SIGNAL(valueChanged(int)), q, SLOT(_k_setSliderParameter(int)));

                } else {

                    double step = 0.1;

                    if (qAbs(maxValue - minValue) > 50)

                        step = 1.0;

                    QDoubleSpinBox *sb = new QDoubleSpinBox(q);

                    control = sb;

                    sb->setRange(minValue, maxValue);

                    sb->setValue(value.toDouble());

                    sb->setSingleStep(step);

                    QObject::connect(sb, SIGNAL(valueChanged(double)), q,

                        SLOT(_k_setDoubleParameter(double)));

                }

            }

            break;

        default:

            break;

        }

        if (control) {

#ifndef QT_NO_TOOLTIP

        control->setToolTip(para.description());

#endif

#ifndef QT_NO_SHORTCUT

            label->setBuddy(control);

#endif

            pLayout->addWidget(control);

            parameterForObject.insert(control, para);

        }

    }

}

void EffectWidgetPrivate::_k_setToggleParameter(bool checked)

{

    Q_Q(EffectWidget);

    if (parameterForObject.contains(q->sender())) {

        effect->setParameterValue(parameterForObject[q->sender()], checked);

    }

}

void EffectWidgetPrivate::_k_setIntParameter(int value)

{

    Q_Q(EffectWidget);

    if (parameterForObject.contains(q->sender())) {

        effect->setParameterValue(parameterForObject[q->sender()], value);

    }

}

void EffectWidgetPrivate::_k_setDoubleParameter(double value)

{

    Q_Q(EffectWidget);

    if (parameterForObject.contains(q->sender())) {

        effect->setParameterValue(parameterForObject[q->sender()], value);

    }

}

void EffectWidgetPrivate::_k_setStringParameter(const QString &value)

{

    Q_Q(EffectWidget);

    if (parameterForObject.contains(q->sender())) {

        effect->setParameterValue(parameterForObject[q->sender()], value);

    }

}

void EffectWidgetPrivate::_k_setSliderParameter(int value)

{

    Q_Q(EffectWidget);

    if (parameterForObject.contains(q->sender())) {

        effect->setParameterValue(parameterForObject[q->sender()], double(value) / double(SLIDER_RANGE));

    }

}

} // namespace Phonon

#endif // QT_NO_PHONON_EFFECTWIDGET

QT_END_NAMESPACE

#include "moc_effectwidget.cpp"

// vim: sw=4 ts=4