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#include "videowidget.h"

#include "videowidgetsurface.h"

#include <QtMultimedia>

//! [0]

VideoWidget::VideoWidget(QWidget *parent)

    : QWidget(parent)

    , surface(0)

{

    setAutoFillBackground(false);

    setAttribute(Qt::WA_NoSystemBackground, true);

    setAttribute(Qt::WA_PaintOnScreen, true);

    QPalette palette = this->palette();

    palette.setColor(QPalette::Background, Qt::black);

    setPalette(palette);

    setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);

    surface = new VideoWidgetSurface(this);

}

//! [0]

//! [1]

VideoWidget::~VideoWidget()

{

    delete surface;

}

//! [1]

//! [2]

QSize VideoWidget::sizeHint() const

{

    return surface->surfaceFormat().sizeHint();

}

//! [2]

//! [3]

void VideoWidget::paintEvent(QPaintEvent *event)

{

    QPainter painter(this);

    if (surface->isActive()) {

        const QRect videoRect = surface->videoRect();

        if (!videoRect.contains(event->rect())) {

            QRegion region = event->region();

            region.subtract(videoRect);

            QBrush brush = palette().background();

            foreach (const QRect &rect, region.rects())

                painter.fillRect(rect, brush);

        }

        surface->paint(&painter);

    } else {

        painter.fillRect(event->rect(), palette().background());

    }

}

//! [3]

//! [4]

void VideoWidget::resizeEvent(QResizeEvent *event)

{

    QWidget::resizeEvent(event);

    surface->updateVideoRect();

}

//! [4]