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#include "roundrectitem.h"

#include <QtGui/QtGui>

RoundRectItem::RoundRectItem(const QRectF &rect, const QBrush &brush, QWidget *embeddedWidget)

    : QGraphicsRectItem(rect),

      brush(brush),

      timeLine(75),

      lastVal(0),

      opa(1),

      proxyWidget(0)

{

    connect(&timeLine, SIGNAL(valueChanged(qreal)),

            this, SLOT(updateValue(qreal)));

    if (embeddedWidget) {

        proxyWidget = new QGraphicsProxyWidget(this);

        proxyWidget->setFocusPolicy(Qt::StrongFocus);

        proxyWidget->setWidget(embeddedWidget);

        proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));

    }

}

void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)

{

    QTransform x = painter->worldTransform();

    QLineF unit = x.map(QLineF(0, 0, 1, 1));

    if (unit.p1().x() > unit.p2().x() || unit.p1().y() > unit.p2().y()) {

        if (proxyWidget && proxyWidget->isVisible()) {

            proxyWidget->hide();

            proxyWidget->setGeometry(rect());

        }

        return;

    }

    if (proxyWidget && !proxyWidget->isVisible()) {

        proxyWidget->show();

        proxyWidget->setFocus();

    }

    if (proxyWidget && proxyWidget->pos() != QPoint())

        proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));

    painter->setOpacity(opacity());

    painter->setPen(Qt::NoPen);

    painter->setBrush(QColor(0, 0, 0, 64));

    painter->drawRoundRect(rect().translated(2, 2));

    if (!proxyWidget) {

        QLinearGradient gradient(rect().topLeft(), rect().bottomRight());

        const QColor col = brush.color();

        gradient.setColorAt(0, col);

        gradient.setColorAt(1, col.dark(int(200 + lastVal * 50)));

        painter->setBrush(gradient);

    } else {

        painter->setBrush(brush);

    }

    painter->setPen(QPen(Qt::black, 1));

    painter->drawRoundRect(rect());

    if (!pix.isNull()) {

        painter->scale(1.95, 1.95);

        painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);;

    }

}

QRectF RoundRectItem::boundingRect() const

{

    qreal penW = 0.5;

    qreal shadowW = 2.0;

    return rect().adjusted(-penW, -penW, penW + shadowW, penW + shadowW);

}

void RoundRectItem::setPixmap(const QPixmap &pixmap)

{

    pix = pixmap;

    if (scene() && isVisible())

        update();

}

qreal RoundRectItem::opacity() const

{

    RoundRectItem *parent = parentItem() ? (RoundRectItem *)parentItem() : 0;

    return opa + (parent ? parent->opacity() : 0);

}

void RoundRectItem::setOpacity(qreal opacity)

{

    opa = opacity;

    update();

}

void RoundRectItem::keyPressEvent(QKeyEvent *event)

{

    if (event->isAutoRepeat() || event->key() != Qt::Key_Return

        || (timeLine.state() == QTimeLine::Running && timeLine.direction() == QTimeLine::Forward)) {

        QGraphicsRectItem::keyPressEvent(event);

        return;

    }

    timeLine.stop();

    timeLine.setDirection(QTimeLine::Forward);

    timeLine.start();

    emit activated();

}

void RoundRectItem::keyReleaseEvent(QKeyEvent *event)

{

    if (event->key() != Qt::Key_Return) {

        QGraphicsRectItem::keyReleaseEvent(event);

        return;

    }

    timeLine.stop();

    timeLine.setDirection(QTimeLine::Backward);

    timeLine.start();

}

void RoundRectItem::updateValue(qreal value)

{

    lastVal = value;

    if (!proxyWidget)

        setTransform(QTransform().scale(1 - value / 10.0, 1 - value / 10.0));

}