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#include <QtGui>

#include <QSvgRenderer>

#if (QT_VERSION >= 0x040600)

#include <QGraphicsEffect>

#endif

#include "iconitem.h"

IconItem::IconItem(const QString &filename, QGraphicsItem *parent) 

  : GvbWidget(parent)

  , m_filename(filename)

  , m_rotation(0.0)

#if (QT_VERSION >= 0x040600)

  , m_opacityEffect(0)

#endif

  , m_smoothTransformation(false)

{

    setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);

    setContentsMargins(0,0,0,0);

    setPreferredSize(58,58);

}

IconItem::~IconItem()

{

}

void IconItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

    Q_UNUSED(option);

    Q_UNUSED(widget);

    reload();

    const QPointF c = boundingRect().center();

    painter->translate(c.x(), c.y());

    painter->rotate(m_rotation);

    painter->translate(-c.x(), -c.y());

    if (m_smoothTransformation)

        painter->setRenderHints(QPainter::SmoothPixmapTransform);

    painter->drawPixmap(0,0, m_pixmap);

}

QSizeF IconItem::sizeHint(Qt::SizeHint which, 

    const QSizeF &constraint) const

{

    switch (which)

    {

    case Qt::MinimumSize:

    case Qt::PreferredSize:

    case Qt::MaximumSize:

        return m_pixmap.size();

    default:

        return GvbWidget::sizeHint(which, constraint);

    }

}

void IconItem::reload()

{

    const QSize iconSize = size().toSize();

    if (iconSize.width() == 0 || iconSize.height()  == 0)

        return;

    const QString key = m_filename+QString::number(iconSize.width())+QString::number(iconSize.height());

    if (QPixmapCache::find(key, m_pixmap))

        return;

    if (m_filename.endsWith(".svg", Qt::CaseInsensitive))

    {

        m_pixmap = QPixmap(iconSize);

        m_pixmap.fill(Qt::transparent);

        QSvgRenderer doc(m_filename);

        QPainter painter(&m_pixmap);

        painter.setViewport(0, 0, iconSize.width(), iconSize.height());

        doc.render(&painter);

    }

    else

    {

        m_pixmap = QPixmap(m_filename).scaled(iconSize);

    }

    QPixmapCache::insert(key, m_pixmap);

    updateGeometry();

}

QString IconItem::fileName() const

{

    return m_filename;

}

void IconItem::setFileName(const QString &filename)

{

    if( m_filename != filename) {

        m_filename = filename;

        reload();

    }

}

#if (QT_VERSION >= 0x040600)

void IconItem::setOpacityEffectEnabled(const bool enable)

{

    if (!m_opacityEffect)

    {

        QRadialGradient gradient(0.5, 0.5, 1.0);

        gradient.setCoordinateMode(QGradient::ObjectBoundingMode);

        gradient.setColorAt(0.0, QColor(0,0,0, 255));

        gradient.setColorAt(0.46, QColor(0,0,0, 255));

        gradient.setColorAt(0.62, QColor(0,0,0, 0));

        m_opacityEffect = new QGraphicsOpacityEffect;

        m_opacityEffect->setOpacityMask(gradient);

        m_opacityEffect->setOpacity(1.0);

        this->setGraphicsEffect(m_opacityEffect);

    }

    m_opacityEffect->setEnabled(enable);

}

bool IconItem::isOpacityEffectEnabled() const

{

    if (m_opacityEffect)

        return m_opacityEffect->isEnabled();

    return false;

}

#endif