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#include "panel.h"

#include "roundrectitem.h"

#include "splashitem.h"

#include "ui_backside.h"

#ifndef QT_NO_OPENGL

#include <QtOpenGL/QtOpenGL>

#else

#endif

#include <QtGui/QtGui>

#include <math.h>

Panel::Panel(int width, int height)

    : selectedX(0),

      selectedY(0),

      width(width),

      height(height),

      flipped(false),

      flipLeft(true)

{

    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    setCacheMode(CacheBackground);

    setViewportUpdateMode(FullViewportUpdate);

    setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform

                   | QPainter::TextAntialiasing);

    setBackgroundBrush(QPixmap(":/images/blue_angle_swirl.jpg"));

#ifndef QT_NO_OPENGL

    setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));

#endif

    setMinimumSize(50, 50);

    selectionTimeLine = new QTimeLine(150, this);

    flipTimeLine = new QTimeLine(500, this);

    QRectF bounds((-width / 2.0) * 150, (-height / 2.0) * 150, width * 150, height * 150);

    scene = new QGraphicsScene(bounds, this);

    scene->setItemIndexMethod(QGraphicsScene::NoIndex);

    setScene(scene);

    baseItem = new RoundRectItem(bounds, QColor(226, 255, 92, 64));

    scene->addItem(baseItem);

    QWidget *embed = new QWidget;

    ui = new Ui_BackSide;

    ui->setupUi(embed);

    ui->hostName->setFocus();

    backItem = new RoundRectItem(bounds, embed->palette().window(), embed);

    backItem->setTransform(QTransform().rotate(180, Qt::YAxis));

    backItem->setParentItem(baseItem);

    selectionItem = new RoundRectItem(QRectF(-60, -60, 120, 120), Qt::gray);

    selectionItem->setParentItem(baseItem);

    selectionItem->setZValue(-1);

    selectionItem->setPos(posForLocation(0, 0));

    startPos = selectionItem->pos();

    grid = new QGraphicsItem **[height];

    for (int y = 0; y < height; ++y) {

        grid[y] = new QGraphicsItem *[width];

        for (int x = 0; x < width; ++x) {

            RoundRectItem *item = new RoundRectItem(QRectF(-54, -54, 108, 108),

                                                    QColor(214, 240, 110, 128));

            item->setPos(posForLocation(x, y));

            item->setParentItem(baseItem);

            item->setFlag(QGraphicsItem::ItemIsFocusable);

            grid[y][x] = item;

            switch (qrand() % 9) {

            case 0: item->setPixmap(QPixmap(":/images/kontact_contacts.png")); break;

            case 1: item->setPixmap(QPixmap(":/images/kontact_journal.png")); break;

            case 2: item->setPixmap(QPixmap(":/images/kontact_notes.png")); break;

            case 3: item->setPixmap(QPixmap(":/images/kopeteavailable.png")); break;

            case 4: item->setPixmap(QPixmap(":/images/metacontact_online.png")); break;

            case 5: item->setPixmap(QPixmap(":/images/minitools.png")); break;

            case 6: item->setPixmap(QPixmap(":/images/kontact_journal.png")); break;

            case 7: item->setPixmap(QPixmap(":/images/kontact_contacts.png")); break;

            case 8: item->setPixmap(QPixmap(":/images/kopeteavailable.png")); break;

            default:

                break;

            }

            connect(item, SIGNAL(activated()), this, SLOT(flip()));

        }

    }

    grid[0][0]->setFocus();

    connect(backItem, SIGNAL(activated()),

            this, SLOT(flip()));

    connect(selectionTimeLine, SIGNAL(valueChanged(qreal)),

            this, SLOT(updateSelectionStep(qreal)));

    connect(flipTimeLine, SIGNAL(valueChanged(qreal)),

            this, SLOT(updateFlipStep(qreal)));

    splash = new SplashItem;

    splash->setZValue(5);

    splash->setPos(-splash->rect().width() / 2, scene->sceneRect().top());

    scene->addItem(splash);

    splash->grabKeyboard();

    updateSelectionStep(0);

    setWindowTitle(tr("Pad Navigator Example"));

}

Panel::~Panel()

{

    for (int y = 0; y < height; ++y)

        delete [] grid[y];

    delete [] grid;

}

void Panel::keyPressEvent(QKeyEvent *event)

{

    if (splash->isVisible() || event->key() == Qt::Key_Return || flipped) {

        QGraphicsView::keyPressEvent(event);

        return;

    }

    selectedX = (selectedX + width + (event->key() == Qt::Key_Right) - (event->key() == Qt::Key_Left)) % width;

    selectedY = (selectedY + height + (event->key() == Qt::Key_Down) - (event->key() == Qt::Key_Up)) % height;

    grid[selectedY][selectedX]->setFocus();

    selectionTimeLine->stop();

    startPos = selectionItem->pos();

    endPos = posForLocation(selectedX, selectedY);

    selectionTimeLine->start();

}

void Panel::resizeEvent(QResizeEvent *event)

{

    QGraphicsView::resizeEvent(event);

    fitInView(scene->sceneRect(), Qt::KeepAspectRatio);

}

void Panel::updateSelectionStep(qreal val)

{

    QPointF newPos(startPos.x() + (endPos - startPos).x() * val,

                   startPos.y() + (endPos - startPos).y() * val);

    selectionItem->setPos(newPos);

    QTransform transform;

    yrot = newPos.x() / 6.0;

    xrot = newPos.y() / 6.0;

    transform.rotate(newPos.x() / 6.0, Qt::YAxis);

    transform.rotate(newPos.y() / 6.0, Qt::XAxis);

    baseItem->setTransform(transform);

}

void Panel::updateFlipStep(qreal val)

{

    qreal finalxrot = xrot - xrot * val;

    qreal finalyrot;

    if (flipLeft)

        finalyrot = yrot - yrot * val - 180 * val;

    else

        finalyrot = yrot - yrot * val + 180 * val;

    QTransform transform;

    transform.rotate(finalyrot, Qt::YAxis);

    transform.rotate(finalxrot, Qt::XAxis);

    qreal scale = 1 - sin(3.14 * val) * 0.3;

    transform.scale(scale, scale);

    baseItem->setTransform(transform);

    if (val == 0)

        grid[selectedY][selectedX]->setFocus();

}

void Panel::flip()

{

    if (flipTimeLine->state() == QTimeLine::Running)

        return;

    if (flipTimeLine->currentValue() == 0) {

        flipTimeLine->setDirection(QTimeLine::Forward);

        flipTimeLine->start();

        flipped = true;

        flipLeft = selectionItem->pos().x() < 0;

    } else {

        flipTimeLine->setDirection(QTimeLine::Backward);

        flipTimeLine->start();

        flipped = false;

    }

}

QPointF Panel::posForLocation(int x, int y) const

{

    return QPointF(x * 150, y * 150)

        - QPointF((width - 1) * 75, (height - 1) * 75);

}