/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

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

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include <QLabel>

#include <QPainter>

#include <QPushButton>

#include <QApplication>

#include <QGraphicsView>

#include <QGraphicsScene>

#include <QGraphicsWidget>

#include <QGraphicsProxyWidget>

#include <QGraphicsAnchorLayout>

#include <QGraphicsSceneResizeEvent>

class PixmapWidget : public QGraphicsLayoutItem

{

public:

    PixmapWidget(const QPixmap &pix) : QGraphicsLayoutItem()

    {

        original = new QGraphicsPixmapItem(pix);

        setGraphicsItem(original);

        original->show();

        r = QRectF(QPointF(0, 0), pix.size());

    }

    ~PixmapWidget()

    {

        setGraphicsItem(0);

        delete original;

    }

    void setZValue(qreal z)

    {

        original->setZValue(z);

    }

    void setGeometry (const QRectF &rect)

    {

        original->scale(rect.width() / r.width(), rect.height() / r.height());

        original->setPos(rect.x(), rect.y());

        r = rect;

    }

protected:

    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const

    {

        Q_UNUSED(constraint);

        QSizeF sh;

        switch (which) {

            case Qt::MinimumSize:

                sh = QSizeF(0, 0);

                break;

            case Qt::PreferredSize:

                sh = QSizeF(50, 50);

                break;

            case Qt::MaximumSize:

                sh = QSizeF(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);

                break;

        }

         return sh;

    }

private:

    QGraphicsPixmapItem *original;

    QRectF r;

};

class PlaceWidget : public QGraphicsWidget

{

    Q_OBJECT

public:

    PlaceWidget(const QPixmap &pix) : QGraphicsWidget(), original(pix), scaled(pix)

    {

    }

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

    {

        QPointF reflection = QPointF();

        reflection.setY(scaled.height() + 2);

        painter->drawPixmap(QPointF(), scaled);

        QPixmap tmp(scaled.size());

        tmp.fill(Qt::transparent);

        QPainter p(&tmp);

        // create gradient

        QPoint p1(scaled.width() / 2, 0);

        QPoint p2(scaled.width() / 2, scaled.height());

        QLinearGradient linearGrad(p1, p2);

        linearGrad.setColorAt(0, QColor(0, 0, 0, 0));

        linearGrad.setColorAt(0.65, QColor(0, 0, 0, 127));

        linearGrad.setColorAt(1, QColor(0, 0, 0, 255));

        // apply 'mask'

        p.setBrush(linearGrad);

        p.fillRect(0, 0, tmp.width(), tmp.height(), QBrush(linearGrad));

        p.fillRect(0, 0, tmp.width(), tmp.height(), QBrush(linearGrad));

        // paint the image flipped

        p.setCompositionMode(QPainter::CompositionMode_DestinationOver);

        p.drawPixmap(0, 0, QPixmap::fromImage(scaled.toImage().mirrored(false, true)));

        p.end();

        painter->drawPixmap(reflection, tmp);

    }

    void resizeEvent(QGraphicsSceneResizeEvent *event)

    {

        QSize newSize = event->newSize().toSize();

        newSize.setHeight(newSize.height() / 2);

        scaled = original.scaled(newSize);

    }

    QRectF boundingRect() const

    {

        QSize size(scaled.width(), scaled.height() * 2 + 2);

        return QRectF(QPointF(0, 0), size);

    }

private:

    QPixmap original;

    QPixmap scaled;

};

int main(int argc, char **argv)

{

    Q_INIT_RESOURCE(weatheranchorlayout);

    QApplication app(argc, argv);

    QGraphicsScene scene;

    scene.setSceneRect(0, 0, 800, 480);

    // pixmaps widgets

    PixmapWidget *title = new PixmapWidget(QPixmap(":/images/title.jpg"));

    PlaceWidget *place = new PlaceWidget(QPixmap(":/images/place.jpg"));

    PixmapWidget *details = new PixmapWidget(QPixmap(":/images/5days.jpg"));

    PixmapWidget *sunnyWeather = new PixmapWidget(QPixmap(":/images/weather-few-clouds.png"));

    PixmapWidget *tabbar = new PixmapWidget(QPixmap(":/images/tabbar.jpg"));

    // setup sizes

    title->setPreferredSize(QSizeF(348, 45));

    title->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);

    place->setPreferredSize(QSizeF(96, 72));

    place->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);

    details->setMinimumSize(QSizeF(200, 112));

    details->setPreferredSize(QSizeF(200, 112));

    details->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);

    tabbar->setPreferredSize(QSizeF(70, 24));

    tabbar->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);

    sunnyWeather->setPreferredSize(QSizeF(128, 97));

    sunnyWeather->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);

    sunnyWeather->setZValue(9999);

    // start anchor layout

    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;

    l->setSpacing(0);

    // setup the main widget

    QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window);

    QPalette p;

    p.setColor(QPalette::Window, Qt::black);

    w->setPalette(p);

    w->setPos(20, 20);

    w->setLayout(l);

    // vertical anchors

    QGraphicsAnchor *anchor = l->addAnchor(title, Qt::AnchorTop, l, Qt::AnchorTop);

    anchor = l->addAnchor(place, Qt::AnchorTop, title, Qt::AnchorBottom);

    anchor->setSpacing(12);

    anchor = l->addAnchor(place, Qt::AnchorBottom, l, Qt::AnchorBottom);

    anchor->setSpacing(12);

    anchor = l->addAnchor(sunnyWeather, Qt::AnchorTop, title, Qt::AnchorTop);

    anchor = l->addAnchor(sunnyWeather, Qt::AnchorBottom, l, Qt::AnchorVerticalCenter);

    anchor = l->addAnchor(tabbar, Qt::AnchorTop, title, Qt::AnchorBottom);

    anchor->setSpacing(5);

    anchor = l->addAnchor(details, Qt::AnchorTop, tabbar, Qt::AnchorBottom);

    anchor->setSpacing(2);

    anchor = l->addAnchor(details, Qt::AnchorBottom, l, Qt::AnchorBottom);

    anchor->setSpacing(12);

    // horizontal anchors

    anchor = l->addAnchor(l, Qt::AnchorLeft, title, Qt::AnchorLeft);

    anchor = l->addAnchor(title, Qt::AnchorRight, l, Qt::AnchorRight);

    anchor = l->addAnchor(place, Qt::AnchorLeft, l, Qt::AnchorLeft);

    anchor->setSpacing(15);

    anchor = l->addAnchor(place, Qt::AnchorRight, details, Qt::AnchorLeft);

    anchor->setSpacing(35);

    anchor = l->addAnchor(sunnyWeather, Qt::AnchorLeft, place, Qt::AnchorHorizontalCenter);

    anchor = l->addAnchor(sunnyWeather, Qt::AnchorRight, l, Qt::AnchorHorizontalCenter);

    anchor = l->addAnchor(tabbar, Qt::AnchorHorizontalCenter, details, Qt::AnchorHorizontalCenter);

    anchor = l->addAnchor(details, Qt::AnchorRight, l, Qt::AnchorRight);

    // QGV setup

    scene.addItem(w);

    scene.setBackgroundBrush(Qt::white);

    QGraphicsView *view = new QGraphicsView(&scene);

    view->show();

    return app.exec();

}

#include "main.moc"