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** This file is part of the QML Presentation System.
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** Foundation and appearing in the file LICENSE.GPL included in the
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#include <QtQml>
#include <QQuickItem>
#include <QDebug>
#include <QPixmap>
#include <QScreen>
#include "slideview.h"

SlideView::SlideView(QWindow* parent): QQuickView(parent),
m_slidesLeft(0), m_printedSlides(0) {
    connect (this, SIGNAL(statusChanged(QQuickView::Status)),
        this, SLOT(updateStatus(QQuickView::Status)));
}

void SlideView::updateStatus(QQuickView::Status status) {
    if (m_slidesLeft > 0) return;
    if (status != QQuickView::Ready) return;
    QQuickItem *ri = rootObject();
    QString superClass = ri->metaObject()->superClass()->className();
    if (!superClass.startsWith("Presentation")) {
        qWarning("Warning: Superclass appears to not be a Presentation: %s. ", superClass.toLocal8Bit().constData());
    }
    else qDebug() << "Found qml Presentation as rootObject";

    ri->setProperty("allowDelay", QVariant(false));//Disable partial reveals on slide pages
    QList<QVariant> slides = ri->property("slides").toList();
    m_slidesLeft = slides.size();
    qDebug() << "SlideCount: " << m_slidesLeft;
    qDebug() << "Printer's Page rect size (and suggested resolution of your presentation): " << m_printer.pageRect().size();
    m_printer.setOrientation(QPrinter::Landscape);
    m_printer.setFullPage(true);
    m_printer.setOutputFileName("slides.pdf");
    m_painter.begin(&m_printer);

    // it would be better if we used the printer resolution here and forced
    // the presentation to be in the same resolution but when I try that,
    // the timer doesn't work properly for some reason?

    setHeight(ri->height());
    setWidth(ri->width());

    // Try uncommenting the below 4 lines and see what happens.
    //setHeight(m_printer.pageRect().height());
    //setWidth(m_printer.pageRect().width());
    //ri->setHeight(height());
    //ri->setWidth(width());

    // start timer to print out pages once every 2 seconds.
    m_tid = startTimer(2000);
}

void SlideView::timerEvent(QTimerEvent*) {
    printCurrentSlide();
    ++m_printedSlides;
    --m_slidesLeft;
    if (m_slidesLeft > 0) {
        m_printer.newPage();
        goToNextSlide();
    }
    else {
        killTimer(m_tid);
        m_painter.end();
        qDebug() << "Printed to file: " << m_printer.outputFileName();
        qApp->exit();
    }

}


void SlideView::printCurrentSlide() {
    QImage pix = grabWindow();
    qDebug() << "Printing slide#" << m_printedSlides + 1 << "Resolution:" << pix.size();

    QRect pageRect = m_printer.pageRect();
    QSize targetSize = pix.size();
    targetSize.scale(pageRect.width(), pageRect.height(), Qt::KeepAspectRatio);

    m_painter.drawImage(QRectF(pageRect.topLeft(), targetSize), pix);
}

void SlideView::goToNextSlide() {
    static const QMetaObject* meta = rootObject()->metaObject();
    meta->invokeMethod(rootObject(), "goToNextSlide");
}