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** This file is part of the examples of the Qt Toolkit.

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#include <QDebug>

#include <QApplication>

#include <QGraphicsLinearLayout>

#if ENABLE_OPENGL

#ifndef QT_NO_OPENGL

#include <QGLWidget>

#endif

#endif

#include <QObject>

#include "button.h"

#include "label.h"

#include "menu.h"

#include "topbar.h"

#include "backgrounditem.h"

#include "theme.h"

#include "mainview.h"

#include "gvbwidget.h"

MainView::MainView(const bool enableOpenGL, const bool outputFps, const bool imageRendering, QWidget *parent)

    : QGraphicsView(parent)

    , m_scene(0)

    , m_mainLayout(0)

    , m_mainWidget(0)

    , m_testWidget(0)

    , m_imageBasedRendering(imageRendering)

    , m_pixmapToRender(0)

    , m_OutputFps(outputFps)

    , m_fpsUpdated()

    , m_Fpss()

    , m_angle(0)

    , m_enableOpenGL(enableOpenGL)

{

    construct();

}

MainView::~MainView()

{

    if (!m_scene->parent())

        delete m_scene;

    delete m_pixmapToRender;

}

void MainView::setTestWidget(QGraphicsWidget *testWidget)

{ 

    if (!testWidget)

        return;

    if (m_testWidget) {

        m_mainLayout->removeItem(m_testWidget);

        if (!m_testWidget->parent() && !m_testWidget->parentLayoutItem())

            delete m_testWidget;

    }

    m_testWidget = testWidget;

    m_mainLayout->addItem(m_testWidget);

    resizeContent(size());

}

QGraphicsWidget *MainView::takeTestWidget()

{

    if (m_testWidget) {

        m_mainLayout->removeItem(m_testWidget);       

        QGraphicsWidget *tmp = m_testWidget;

        m_testWidget = 0;

        return tmp;

    }

    return 0;

}

QGraphicsWidget *MainView::testWidget()

{

    return m_testWidget;

}

void MainView::setImageBasedRendering(const bool imageBasedRendering)

{

    m_imageBasedRendering = imageBasedRendering;

    viewport()->update();

}

bool MainView::imageBasedRendering() const

{

    return m_imageBasedRendering;

}

qreal MainView::fps()

{

    if (m_Fpss.count() <= 0)

        updateFps();

    if (m_Fpss.count() <= 0)

        return 0.0;

    qreal sum = 0;

    int count = m_Fpss.count();

    for (int i = 0; i<count; ++i)

        sum += m_Fpss.at(i);

    m_Fpss.clear();

    fpsReset();

    return sum/qreal(count);

}

void MainView::fpsReset()

{

    m_frameCount = 0;

    m_fpsFirstTs.start();

    m_fpsLatestTs = m_fpsFirstTs;

    m_fpsUpdated.start();

}

void MainView::rotateContent(int angle)

{

    bool portrait = ((m_angle+angle)%90 == 0) && ((m_angle+angle)%180 != 0);

    bool landscape = ((m_angle+angle)%180 == 0);

    if (!portrait && !landscape)

        return;

    m_angle = (m_angle + angle)%360;

    rotate(angle);

    resizeContent(size());

}

int MainView::rotationAngle() const

{

    return m_angle;

}

void MainView::resizeContent(const QSize &s)

{

    QSizeF l_size(s);

    QSizeF p_size(l_size.height(), l_size.width());

    bool portrait = (m_angle%90 == 0) && (m_angle%180 != 0);

    if (portrait) {

        m_mainWidget->resize(p_size);

        m_backGround->resize(p_size);

    }

    else {

        m_mainWidget->resize(l_size);

        m_backGround->resize(l_size);

    }

    m_menu->setPos(m_topBar->getStatusBarLocation());

    setSceneRect(QRectF(m_mainWidget->pos(), m_mainWidget->size()));

}

void MainView::resizeEvent(QResizeEvent * event)

{

    QGraphicsView::resizeEvent(event);

    resizeContent(event->size());

}

void MainView::paintEvent (QPaintEvent *event)

{

    if (m_imageBasedRendering) {

        if (!m_pixmapToRender)

            m_pixmapToRender = new QPixmap(size());

        if (m_pixmapToRender->size() != size()) {

            delete m_pixmapToRender;

            m_pixmapToRender = new QPixmap(size());

        }

        QPainter p(m_pixmapToRender);

        render(&p);

        p.end();

    }

    else {

        QGraphicsView::paintEvent(event);

    }

    m_frameCount++;

    m_fpsLatestTs.start();

    if(m_fpsUpdated.elapsed() > 2000) {

        updateFps();

        m_fpsUpdated.start();

    }

}

void MainView::keyPressEvent(QKeyEvent *event)

{

    if (event->key() == Qt::Key_F) {

        if (isFullScreen())

            showNormal();

        else

            showFullScreen();

    }

    //S60 3.x specific

    if(m_menu->menuVisible()) {

        m_menu->keyPressEvent(event);

        return;

    }

    if(event->key() == 16777235 ) { //Up Arrow

        GvbWidget* widget = qobject_cast<GvbWidget*>(m_testWidget);

        if(widget)

            widget->keyPressEvent(event);

    }

    if(event->key() == 16777237 ) { //Down Arrow

        GvbWidget* widget = qobject_cast<GvbWidget*>(m_testWidget);

        if(widget)

            widget->keyPressEvent(event);

    }

    if(event->key() == 17825792 ) { //LSK

        if(!m_menu->menuVisible())

            m_menu->menuShowHide();

    }

    if(event->key() == 17825793 ) { //RSK

        QApplication::quit();

    }

}

void MainView::construct()

{

    m_scene = new QGraphicsScene;

#ifdef ENABLE_OPENGL

#ifndef QT_NO_OPENGL

    if (m_enableOpenGL) {

        qDebug() << "OpenGL enabled";

        m_scene->setSortCacheEnabled(false);        

        setViewport(new QGLWidget);

        // Qt doc says: This is the preferred update mode for

        // viewports that do not support partial updates, such as QGLWidget...

        setViewportUpdateMode(QGraphicsView::FullViewportUpdate);

    }

#endif

#endif

    setScene(m_scene);

    if (!m_enableOpenGL)

        setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);

    m_scene->setItemIndexMethod(QGraphicsScene::NoIndex);

    //setCacheMode(QGraphicsView::CacheBackground);

    setAlignment(Qt::AlignLeft | Qt::AlignTop);

    // Turn off automatic background

    setAttribute(Qt::WA_OpaquePaintEvent);

    setAttribute(Qt::WA_NoBackground);

    setAttribute(Qt::WA_NoSystemBackground);

    setAutoFillBackground(false);

    //Background

    m_backGround = new BackgroundItem("background.svg");

    m_scene->addItem(m_backGround);

    m_backGround->setZValue(0);

    //Menu

    m_menu = new Menu(this);

    m_scene->addItem(m_menu); //Add menu to the scene directly

    m_menu->setZValue(10); //Bring to front

    m_mainLayout = new QGraphicsLinearLayout(Qt::Vertical);

    m_mainLayout->setContentsMargins(0,0,0,0);

    m_mainLayout->setSpacing(0);

    m_mainWidget = new QGraphicsWidget;

    m_mainWidget->setLayout(m_mainLayout);

    m_mainWidget->setZValue(1);

    m_scene->addItem(m_mainWidget);

    //Topbar

    m_topBar = new TopBar(this, 0);

    m_mainLayout->addItem(m_topBar);

    m_topBar->setZValue(1);

    connect(m_topBar, SIGNAL(clicked(bool)), m_menu, SLOT(menuShowHide()));

    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    setContentsMargins(0,0,0,0);

    setViewportMargins(0,0,0,0);

    setFrameShape(QFrame::NoFrame);

    fpsReset();

    m_fpsUpdated.start();

}

void MainView::updateFps()

{

    int msecs =  m_fpsFirstTs.msecsTo(m_fpsLatestTs);

    qreal fps = 0;

    if (msecs > 0) {

        fps = m_frameCount * 1000.0 / msecs;

        if (m_OutputFps)

            qDebug() << "FPS: " << fps;

        m_Fpss.append(fps);

    }

    m_fpsFirstTs = m_fpsLatestTs;

    m_frameCount = 0;

}

Menu *MainView::menu()

{

    return m_menu;

}