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#include <QtTest/QtTest>

#include <qcoreapplication.h>

#include <qdebug.h>

#include <qboxlayout.h>

#include <qmenubar.h>

#include <qdialog.h>

#include <qsizegrip.h>

#include <qlabel.h>

#include <QtGui/QFrame>

#include <QtGui/QWindowsStyle>

#include <QtGui/QSizePolicy>

#include <QPushButton>

#include <QRadioButton>

#include <private/qlayoutengine_p.h>

#ifdef Q_OS_MAC

# include <QtGui/QMacStyle>

#endif

//TESTED_CLASS=

//TESTED_FILES=

class tst_QLayout : public QObject

{

Q_OBJECT

public:

    tst_QLayout();

    virtual ~tst_QLayout();

private slots:

    void getSetCheck();

    void geometry();

    void smartMaxSize();

    void setLayoutBugs();

#ifdef QT3_SUPPORT

    void task193350_sizeGrip();

#endif

    void setContentsMargins();

    void layoutItemRect();

    void warnIfWrongParent();

    void controlTypes();

    void adjustSizeShouldMakeSureLayoutIsActivated();

};

tst_QLayout::tst_QLayout()

{

}

tst_QLayout::~tst_QLayout()

{

}

// Testing get/set functions

void tst_QLayout::getSetCheck()

{

    QBoxLayout obj1(QBoxLayout::LeftToRight);

    // QWidget * QLayout::menuBar()

    // void QLayout::setMenuBar(QWidget *)

    QMenuBar *var1 = new QMenuBar();

    obj1.setMenuBar(var1);

    QCOMPARE(static_cast<QWidget *>(var1), obj1.menuBar());

    obj1.setMenuBar((QWidget *)0);

    QCOMPARE((QWidget *)0, obj1.menuBar());

    delete var1;

}

class SizeHinterFrame : public QFrame

{

public:

    SizeHinterFrame(const QSize &sh, const QSize &msh = QSize())

    : QFrame(0), sh(sh), msh(msh) {

        setFrameStyle(QFrame::Box | QFrame::Plain);

    }

    void setSizeHint(const QSize &s) { sh = s; }

    QSize sizeHint() const { return sh; }

    QSize minimumSizeHint() const { return msh; }

private:

    QSize sh;

    QSize msh;

};

void tst_QLayout::geometry()

{

    // For QWindowsStyle we know that QWidgetItem::geometry() and QWidget::geometry()

    // should be the same.

    QApplication::setStyle(new QWindowsStyle);

    QWidget w;

    QVBoxLayout layout(&w);

    SizeHinterFrame widget(QSize(100,100));

    layout.addWidget(&widget);

    QLayoutItem *item = layout.itemAt(0);

    w.show();

    QApplication::processEvents();

    QCOMPARE(item->geometry().size(), QSize(100,100));

    widget.setMinimumSize(QSize(110,110));

    QCOMPARE(item->geometry().size(), QSize(110,110));

    widget.setMinimumSize(QSize(0,0));

    widget.setMaximumSize(QSize(90,90));

    widget.setSizeHint(QSize(100,100));

    QCOMPARE(item->geometry().size(), QSize(90,90));

}

void tst_QLayout::smartMaxSize()

{

    QVector<int> expectedWidths; 

    QFile f(QLatin1String("baseline/smartmaxsize"));

    QCOMPARE(f.open(QIODevice::ReadOnly | QIODevice::Text), true);

    QTextStream stream(&f);

    while(!stream.atEnd()) {

        QString line = stream.readLine(200);

        expectedWidths.append(line.section(QLatin1Char(' '), 6, -1, QString::SectionSkipEmpty).toInt());

    }

    f.close();

    int sizeCombinations[] = { 0, 10, 20, QWIDGETSIZE_MAX};

    QSizePolicy::Policy policies[] = {  QSizePolicy::Fixed, 

                                        QSizePolicy::Minimum, 

                                        QSizePolicy::Maximum, 

                                        QSizePolicy::Preferred,

                                        QSizePolicy::Expanding,

                                        QSizePolicy::MinimumExpanding,

                                        QSizePolicy::Ignored

                                        };

    Qt::Alignment alignments[] = {  0,

                                    Qt::AlignLeft,

                                    Qt::AlignRight,

                                    Qt::AlignHCenter

                                    };

    int expectedIndex = 0;

    int regressionCount = 0;

    for (int p = 0; p < sizeof(policies)/sizeof(QSizePolicy::Policy); ++p) {

        QSizePolicy sizePolicy;

        sizePolicy.setHorizontalPolicy(policies[p]);

        for (int min = 0; min < sizeof(sizeCombinations)/sizeof(int); ++min) {

            int minSize = sizeCombinations[min];

            for (int max = 0; max < sizeof(sizeCombinations)/sizeof(int); ++max) {

                int maxSize = sizeCombinations[max];

                for (int sh = 0; sh < sizeof(sizeCombinations)/sizeof(int); ++sh) {

                    int sizeHint = sizeCombinations[sh];

                    for (int a = 0; a < sizeof(alignments)/sizeof(int); ++a) {

                        Qt::Alignment align = alignments[a];

                        QSize sz = qSmartMaxSize(QSize(sizeHint, 1), QSize(minSize, 1), QSize(maxSize, 1), sizePolicy, align);

                        int width = sz.width();

#if 0

                        qDebug() << expectedIndex << sizePolicy.horizontalPolicy() << align << minSize << sizeHint << maxSize << width;

#else

                        int expectedWidth = expectedWidths[expectedIndex];

                        if (width != expectedWidth) {

                            qDebug() << "error at index" << expectedIndex << ":" << sizePolicy.horizontalPolicy() << align << minSize << sizeHint << maxSize << width;

                            ++regressionCount;

                        }

#endif

                        ++expectedIndex;

                    }

                }

            }

        }

    }

    QCOMPARE(regressionCount, 0);

}

void tst_QLayout::setLayoutBugs()

{

    QWidget widget(0);

    QHBoxLayout *hBoxLayout = new QHBoxLayout(&widget);

    for(int i = 0; i < 6; ++i) {

        QPushButton *pushButton = new QPushButton("Press me!", &widget);

        hBoxLayout->addWidget(pushButton);

    }

    widget.setLayout(hBoxLayout);

    QVERIFY(widget.layout() == hBoxLayout);

    QWidget containerWidget(0);

    containerWidget.setLayout(widget.layout());

    QVERIFY(widget.layout() == 0);

    QVERIFY(containerWidget.layout() == hBoxLayout);

}

#ifdef QT3_SUPPORT

void tst_QLayout::task193350_sizeGrip()

{

    QDialog dialog;

    dialog.setSizeGripEnabled(true);

    QVBoxLayout* layout = new QVBoxLayout(&dialog);

    layout->setAutoAdd(true);

    new QLabel("Label", &dialog);

    dialog.show();

    QCOMPARE(layout->indexOf(qFindChild<QSizeGrip *>(&dialog)),-1);

}

#endif

class MyLayout : public QLayout

{

    public:

        MyLayout() : invalidated(false) {}

        virtual void invalidate() {invalidated = true;}

        bool invalidated;

        QSize sizeHint() const {return QSize();}

        void addItem(QLayoutItem*) {}

        QLayoutItem* itemAt(int) const {return 0;}

        QLayoutItem* takeAt(int) {return 0;}

        int count() const {return 0;}

};

void tst_QLayout::setContentsMargins()

{

    MyLayout layout;

    layout.invalidated = false;

    int left, top, right, bottom;

    layout.setContentsMargins(52, 53, 54, 55);

    QVERIFY(layout.invalidated);

    layout.invalidated = false;

    layout.getContentsMargins(&left, &top, &right, &bottom);

    QCOMPARE(left, 52);

    QCOMPARE(top, 53);

    QCOMPARE(right, 54);

    QCOMPARE(bottom, 55);

    layout.setContentsMargins(52, 53, 54, 55);

    QVERIFY(!layout.invalidated);

}

class EventReceiver : public QObject

{

public:

    bool eventFilter(QObject *watched, QEvent *event)

    {

        if (event->type() == QEvent::Show) {

            geom = static_cast<QWidget*>(watched)->geometry();

        }

        return false;

    }

    QRect geom;

};

void tst_QLayout::layoutItemRect()

{

#ifdef Q_OS_MAC

    if (qobject_cast<QMacStyle*>(QApplication::style())) {

        QWidget *window = new QWidget;

        QRadioButton *radio = new QRadioButton(window);

        QWidgetItem item(radio);

        EventReceiver eventReceiver;

        radio->installEventFilter(&eventReceiver);

        radio->show();

        QApplication::processEvents();

        QApplication::processEvents();

        QSize s = item.sizeHint();

        item.setAlignment(Qt::AlignVCenter);

        item.setGeometry(QRect(QPoint(0, 0), s));

        QCOMPARE(radio->geometry().size(), radio->sizeHint());

        delete radio;

    }

#endif

}

void tst_QLayout::warnIfWrongParent()

{

    QWidget root;

    QHBoxLayout lay;

    lay.setParent(&root);

    QTest::ignoreMessage(QtWarningMsg, "QLayout::parentWidget: A layout can only have another layout as a parent.");

    QCOMPARE(lay.parentWidget(), static_cast<QWidget*>(0));

}

void tst_QLayout::controlTypes()

{

    QVBoxLayout layout;

    QCOMPARE(layout.controlTypes(), QSizePolicy::DefaultType);

    QSizePolicy p;

    QCOMPARE(p.controlType(),QSizePolicy::DefaultType);

}

void tst_QLayout::adjustSizeShouldMakeSureLayoutIsActivated()

{

    QWidget main;

    QVBoxLayout *const layout = new QVBoxLayout(&main);

    layout->setMargin(0);

    SizeHinterFrame *frame = new SizeHinterFrame(QSize(200, 10), QSize(200, 8));

    frame->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);

    layout->addWidget(frame);

    SizeHinterFrame *frame2 = new SizeHinterFrame(QSize(200, 10), QSize(200, 8));

    frame2->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);

    layout->addWidget(frame2);

    main.show();

    frame2->hide();

    main.adjustSize();

    QCOMPARE(main.size(), QSize(200, 10));

}

QTEST_MAIN(tst_QLayout)

#include "tst_qlayout.moc"