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#include <QtTest/QtTest>

#include <QtGui>

#include <math.h>

//TESTED_CLASS=QGraphicsLayout

//TESTED_FILES=

class tst_QGraphicsLayout : public QObject

{

Q_OBJECT

public:

    tst_QGraphicsLayout();

    virtual ~tst_QGraphicsLayout();

private slots:

    void sizeHints();

    void compressLayoutRequest();

    void automaticReparenting();

    void verifyActivate();

    void constructors();

    void alternativeLayoutItems();

    void ownership();

};

tst_QGraphicsLayout::tst_QGraphicsLayout()

{

}

tst_QGraphicsLayout::~tst_QGraphicsLayout()

{

}

void tst_QGraphicsLayout::sizeHints()

{

    QGraphicsView view;

    QGraphicsScene scene;

    QGraphicsWidget *window = new QGraphicsWidget();

    scene.addItem(window);

    QGraphicsLinearLayout *lout = new QGraphicsLinearLayout(window);

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

    QGraphicsWidget *gw = new QGraphicsWidget(window);

    gw->setMinimumSize(QSizeF(10,10));

    gw->setPreferredSize(QSizeF(100,100));

    gw->setMaximumSize(QSizeF(500,500));

    lout->addItem(gw);

    QCOMPARE(lout->effectiveSizeHint(Qt::MinimumSize), gw->effectiveSizeHint(Qt::MinimumSize));

    QCOMPARE(lout->effectiveSizeHint(Qt::PreferredSize), gw->effectiveSizeHint(Qt::PreferredSize));

    QCOMPARE(lout->effectiveSizeHint(Qt::MaximumSize), gw->effectiveSizeHint(Qt::MaximumSize));

}

class TestGraphicsWidget : public QGraphicsWidget {

public:

    TestGraphicsWidget(QGraphicsWidget *parent = 0) : QGraphicsWidget(parent)

    { }

    bool event(QEvent *e) {

        ++(m_eventCount[int(e->type())]);

        return QGraphicsWidget::event(e);

    }

    int eventCount(QEvent::Type type) {

        return m_eventCount.value(int(type));

    }

    void clearEventCount() {

        m_eventCount.clear();

    }

private:

    QMap<int, int> m_eventCount;

};

void tst_QGraphicsLayout::compressLayoutRequest()

{

    QGraphicsView view;

    QGraphicsScene scene;

    TestGraphicsWidget *tw = new TestGraphicsWidget();

    scene.addItem(tw);

    view.show();

    QGraphicsLinearLayout *lout = new QGraphicsLinearLayout(tw);

    for (int i = 0; i < 4; ++i) {

        QGraphicsWidget *gw = new QGraphicsWidget(tw);

        gw->setPreferredSize(QSizeF(50, 50));

        lout->addItem(gw);

    }

    QApplication::processEvents();

    QCOMPARE(tw->eventCount(QEvent::LayoutRequest), 1);

}

void tst_QGraphicsLayout::automaticReparenting()

{

    QGraphicsView view;

    QGraphicsScene scene;

    {

        QGraphicsWidget *w = new QGraphicsWidget();

        QGraphicsLinearLayout *l = new QGraphicsLinearLayout(w);

        QGraphicsWidget *w1 = new QGraphicsWidget;

        l->addItem(w1);

        scene.addItem(w);

        QCOMPARE(w1->parentWidget(), w);

        delete w;

    }

    {

        QGraphicsWidget *w = new QGraphicsWidget();

        QGraphicsLinearLayout *l = new QGraphicsLinearLayout(w);

        QGraphicsWidget *w1 = new QGraphicsWidget;

        l->addItem(w1);

        scene.addItem(w);

        QCOMPARE(w1->parentWidget(), w);

        QGraphicsWidget *ww = new QGraphicsWidget();

        QGraphicsLinearLayout *l1 = new QGraphicsLinearLayout(ww);

#if !defined(Q_OS_MAC) && defined(QT_DEBUG)

        QTest::ignoreMessage(QtWarningMsg, "QGraphicsLayout::addChildLayoutItem: QGraphicsWidget \"\""

                             " in wrong parent; moved to correct parent");

#endif

        l1->addItem(w1);

        QCOMPARE(w1->parentWidget(), ww);

        delete w;

    }

    QGraphicsWidget *window = new QGraphicsWidget();

    scene.addItem(window);

    view.show();

    QGraphicsLinearLayout *l1 = new QGraphicsLinearLayout();

    QGraphicsWidget *w1 = new QGraphicsWidget();

    l1->addItem(w1);

    QGraphicsWidget *w2 = new QGraphicsWidget();

    l1->addItem(w2);

    QCOMPARE(w1->parentItem(), static_cast<QGraphicsItem*>(0));

    QCOMPARE(w2->parentItem(), static_cast<QGraphicsItem*>(0));

    scene.addItem(w1);

    QCOMPARE(w1->parentItem(), static_cast<QGraphicsItem*>(0));

    window->setLayout(l1);

    QCOMPARE(w1->parentItem(), static_cast<QGraphicsItem*>(window));

    QCOMPARE(w2->parentItem(), static_cast<QGraphicsItem*>(window));

    // Sublayouts

    QGraphicsLinearLayout *l2 = new QGraphicsLinearLayout();

    QGraphicsWidget *w3 = new QGraphicsWidget();

    l2->addItem(w3);

    QGraphicsWidget *w4 = new QGraphicsWidget();

    l2->addItem(w4);

    QGraphicsLinearLayout *l3 = new QGraphicsLinearLayout();

    l2->addItem(l3);

    QGraphicsWidget *window2 = new QGraphicsWidget();

    scene.addItem(window2);

    window2->setLayout(l2);

    QCOMPARE(w3->parentItem(), static_cast<QGraphicsItem*>(window2));

    QCOMPARE(w4->parentItem(), static_cast<QGraphicsItem*>(window2));

    // graphics item with another parent

    QGraphicsLinearLayout *l5 = new QGraphicsLinearLayout();

    l5->addItem(w1);

    l5->addItem(w2);

    QCOMPARE(w1->parentItem(), static_cast<QGraphicsItem*>(window));

    QCOMPARE(w2->parentItem(), static_cast<QGraphicsItem*>(window));

    QGraphicsLinearLayout *l4 = new QGraphicsLinearLayout();

    l4->addItem(l5);

    QGraphicsWidget *window3 = new QGraphicsWidget();

    scene.addItem(window3);

    window3->setLayout(l4);

    QCOMPARE(w1->parentItem(), static_cast<QGraphicsItem*>(window3));

    QCOMPARE(w2->parentItem(), static_cast<QGraphicsItem*>(window3));

}

class TestLayout : public QGraphicsLinearLayout

{

    public:

    TestLayout(QGraphicsLayoutItem *parent = 0)

        : QGraphicsLinearLayout(parent)

    {

        m_count = 0;

    }

    void setGeometry(const QRectF &rect) {

        ++m_count;

        QGraphicsLinearLayout::setGeometry(rect);

    }

    int m_count;

};

void tst_QGraphicsLayout::verifyActivate()

{

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    QGraphicsWidget *window = new QGraphicsWidget();

    scene.addItem(window);

    TestLayout *lout = new TestLayout(window);

    QGraphicsWidget *w = new QGraphicsWidget();

    lout->addItem(w);

    window->setLayout(lout);

    QCOMPARE(lout->m_count, 0);

    window->setVisible(false);

    QCOMPARE(lout->m_count, 0);

    window->setVisible(true);

    // on polish or the first time a widget is shown, the widget is resized.

    QCOMPARE(lout->m_count, 1);

}

class Layout : public QGraphicsLayout

{

public:

    Layout(QGraphicsLayoutItem *parentItem = 0) : QGraphicsLayout(parentItem) {}

    void setGeometry(const QRectF &rect)

    {

        QGraphicsLayout::setGeometry(rect);

    }

    int count() const {

        return 0;

    }

    QGraphicsLayoutItem *itemAt(int index) const {

        Q_UNUSED(index);

        return 0;

    }

    void removeAt(int index)

    {

        Q_UNUSED(index);

    }

protected:

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

    {

        Q_UNUSED(constraint);

        Q_UNUSED(which);

        return QSizeF(100,100);

    }

};

void tst_QGraphicsLayout::constructors()

{

    // Strange test, but see the fix that was with this submit

    QVector<Layout*> layouts;

    for (int pass = 0; pass < 5; ++pass) {

        Layout *lay = new Layout();

        layouts << lay;

        qreal left, top, right, bottom;

        lay->getContentsMargins(&left, &top, &right, &bottom);

        // Test if the style defaults are sane (should always be ints)

        double intpart;

        QVERIFY(modf(left, &intpart) == 0.0);

        QVERIFY(modf(top, &intpart) == 0.0);

        QVERIFY(modf(right, &intpart) == 0.0);

        QVERIFY(modf(bottom, &intpart) == 0.0);

        lay->setContentsMargins(1, 2, 4, 8);

        lay->getContentsMargins(&left, &top, &right, &bottom);

        QCOMPARE(int(left), 1);

        QCOMPARE(int(top), 2);

        QCOMPARE(int(right), 4);

        QCOMPARE(int(bottom), 8);

    }

    qDeleteAll(layouts);

}

class AnimatedLayoutItem : public QGraphicsLayoutItem {

public:

    AnimatedLayoutItem(QGraphicsRectItem *item)

    : QGraphicsLayoutItem()

    {

        setGraphicsItem(item);

    }

    void setGeometry(const QRectF &geom);

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

    inline QGraphicsRectItem *rectItem() {

        return static_cast<QGraphicsRectItem *>(graphicsItem());

    }

    QRectF m_geom;

private:

    AnimatedLayoutItem() {}

};

void AnimatedLayoutItem::setGeometry(const QRectF &geom)

{

    QGraphicsLayoutItem::setGeometry(geom);

}

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

{

    switch (which) {

    case Qt::MinimumSize:

        return QSizeF(32,32);

    case Qt::PreferredSize:

        return QSizeF(160,90);

    case Qt::MaximumSize:

        return QSizeF(1000,1000);

    default:

        return QSizeF(300, 300);

    }

}

class AnimatedLayout : public QObject, public QGraphicsLinearLayout {

    Q_OBJECT

public:

    AnimatedLayout(QGraphicsWidget *widget) : QGraphicsLinearLayout(widget), m_timeline(500, this)

    {

        connect(&m_timeline, SIGNAL(valueChanged(qreal)), this, SLOT(valueChanged(qreal)));

    }

    void setGeometry(const QRectF &geom) {

        fromGeoms.clear();

        toGeoms.clear();

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

            fromGeoms << itemAt(i)->geometry();

        }

        QGraphicsLinearLayout::setGeometry(geom);

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

            toGeoms << itemAt(i)->geometry();

        }

        m_timeline.start();

    }

private slots:

    void valueChanged(qreal value) {

        for (int i = 0; i < fromGeoms.count(); ++i) {

            QGraphicsLayoutItem *li = itemAt(i);

            QRectF from = fromGeoms.at(i);

            QRectF to = toGeoms.at(i);

            QRectF geom(from.topLeft() + (to.topLeft() - from.topLeft()) * value,

                        from.size() + (to.size() - from.size()) * value);

            static_cast<QGraphicsRectItem*>(li->graphicsItem())->setRect(geom);

        }

    }

private:

    QTimeLine m_timeline;

    QVector<QRectF> fromGeoms;

    QVector<QRectF> toGeoms;

};

void tst_QGraphicsLayout::alternativeLayoutItems()

{

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    QGraphicsWidget *window = new QGraphicsWidget;

    scene.addItem(window);

    AnimatedLayout *lout = new AnimatedLayout(window);

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

    lout->setSpacing(0);

    QGraphicsRectItem *item1 = new QGraphicsRectItem;

    AnimatedLayoutItem *li1 = new AnimatedLayoutItem(item1);

    lout->addItem(li1);

    QGraphicsRectItem *item2 = new QGraphicsRectItem;

    AnimatedLayoutItem *li2 = new AnimatedLayoutItem(item2);

    lout->addItem(li2);

    QGraphicsRectItem *item3 = new QGraphicsRectItem;

    AnimatedLayoutItem *li3 = new AnimatedLayoutItem(item3);

    lout->addItem(li3);

    window->setLayout(lout);

    window->setGeometry(0, 0, 99, 99);

    view.setSceneRect(QRectF(-10, -10, 110, 110));

    view.resize(150, 150);

    view.show();

    QApplication::processEvents();

    QTest::qWait(750);

    QApplication::processEvents();

    QCOMPARE(static_cast<QGraphicsRectItem*>(li1->graphicsItem())->rect(), QRectF( 0, 0, 33, 99));

    QCOMPARE(static_cast<QGraphicsRectItem*>(li2->graphicsItem())->rect(), QRectF(33, 0, 33, 99));

    QCOMPARE(static_cast<QGraphicsRectItem*>(li3->graphicsItem())->rect(), QRectF(66, 0, 33, 99));

    lout->setOrientation(Qt::Vertical);

    QApplication::processEvents();

    QTest::qWait(750);

    QApplication::processEvents();

    QCOMPARE(static_cast<QGraphicsRectItem*>(li1->graphicsItem())->rect(), QRectF(0, 0,  99, 33));

    QCOMPARE(static_cast<QGraphicsRectItem*>(li2->graphicsItem())->rect(), QRectF(0, 33, 99, 33));

    QCOMPARE(static_cast<QGraphicsRectItem*>(li3->graphicsItem())->rect(), QRectF(0, 66, 99, 33));

}

class CustomLayoutItem : public QGraphicsLayoutItem {

public:

    CustomLayoutItem(QSet<QGraphicsLayoutItem*> *destructedSet)

    : QGraphicsLayoutItem()

    {

        m_destructedSet = destructedSet;

        setOwnedByLayout(true);

    }

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

    ~CustomLayoutItem() {

        m_destructedSet->insert(this);

    }

private:

    QSet<QGraphicsLayoutItem*> *m_destructedSet;

};

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

{

    switch (which) {

    case Qt::MinimumSize:

        return QSizeF(32,32);

    case Qt::PreferredSize:

        return QSizeF(160,90);

    case Qt::MaximumSize:

        return QSizeF(1000,1000);

    default:

        return QSizeF(300, 300);

    }

}

class CustomGraphicsWidget : public QGraphicsWidget {

public:

    CustomGraphicsWidget(QSet<QGraphicsLayoutItem*> *destructedSet = 0)

    : QGraphicsWidget()

    {

        m_destructedSet = destructedSet;

    }

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

    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget * = 0)

    {

        const QRect r = option->rect.adjusted(0, 0, -1, -1);

        painter->drawLine(r.topLeft(), r.bottomRight());

        painter->drawLine(r.bottomLeft(), r.topRight());

        painter->drawRect(r);

    }

    ~CustomGraphicsWidget() {

        if (m_destructedSet)

            m_destructedSet->insert(this);

    }

private:

    QSet<QGraphicsLayoutItem*> *m_destructedSet;

};

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

{

    switch (which) {

    case Qt::MinimumSize:

        return QSizeF(32,32);

    case Qt::PreferredSize:

        return QSizeF(160,90);

    case Qt::MaximumSize:

        return QSizeF(1000,1000);

    default:

        return QSizeF(300, 300);

    }

}

static bool compareSets(const QSet<QGraphicsLayoutItem*> &actual, const QSet<QGraphicsLayoutItem*> &expected)

{

    if (actual != expected) {

        qDebug() << "actual:" << actual << "expected:" << expected;

        return false;

    }

    return true;

}

class CustomLayout : public QGraphicsLayout

{

public :