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** This file is part of the test suite of the Qt Toolkit.

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#include <QtTest/QtTest>

#include <QtGui>

//TESTED_CLASS=

//TESTED_FILES=

class tst_QBoxLayout : public QObject

{

    Q_OBJECT

public:

    tst_QBoxLayout();

    virtual ~tst_QBoxLayout();

public slots:

    void initTestCase();

    void cleanupTestCase();

    void init();

    void cleanup();

private slots:

    void insertSpacerItem();

    void sizeHint();

    void sizeConstraints();

    void setGeometry();

    void setStyleShouldChangeSpacing();

};

class CustomLayoutStyle : public QWindowsStyle

{

    Q_OBJECT

public:

    CustomLayoutStyle() : QWindowsStyle()

    {

        hspacing = 5;

        vspacing = 10;

    }

    virtual int pixelMetric(PixelMetric metric, const QStyleOption * option = 0,

                            const QWidget * widget = 0 ) const;

    int hspacing;

    int vspacing;

};

int CustomLayoutStyle::pixelMetric(PixelMetric metric, const QStyleOption * option /*= 0*/,

                                   const QWidget * widget /*= 0*/ ) const

{

    switch (metric) {

        case PM_LayoutLeftMargin:

            return 0;

        break;

        case PM_LayoutTopMargin:

            return 3;

        break;

        case PM_LayoutRightMargin:

            return 6;

        break;

        case PM_LayoutBottomMargin:

            return 9;

        break;

        case PM_LayoutHorizontalSpacing:

            return hspacing;

        case PM_LayoutVerticalSpacing:

            return vspacing;

        break;

        default:

            break;

    }

    return QWindowsStyle::pixelMetric(metric, option, widget);

}

tst_QBoxLayout::tst_QBoxLayout()

{

}

tst_QBoxLayout::~tst_QBoxLayout()

{

}

void tst_QBoxLayout::initTestCase()

{

}

void tst_QBoxLayout::cleanupTestCase()

{

}

void tst_QBoxLayout::init()

{

}

void tst_QBoxLayout::cleanup()

{

}

void tst_QBoxLayout::insertSpacerItem()

{

    QWidget *window = new QWidget;

    QSpacerItem *spacer1 = new QSpacerItem(20, 10, QSizePolicy::Expanding, QSizePolicy::Expanding);

    QSpacerItem *spacer2 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Expanding);

    QBoxLayout *layout = new QHBoxLayout;

    layout->addWidget(new QLineEdit("Foooooooooooooooooooooooooo"));

    layout->addSpacerItem(spacer1);

    layout->addWidget(new QLineEdit("Baaaaaaaaaaaaaaaaaaaaaaaaar"));

    layout->insertSpacerItem(0, spacer2);

    window->setLayout(layout);

    QVERIFY(layout->itemAt(0) == spacer2);

    QVERIFY(layout->itemAt(2) == spacer1);

    window->show();

}

void tst_QBoxLayout::sizeHint()

{

    QWidget *window = new QWidget;

    QHBoxLayout *lay1 = new QHBoxLayout;

    QHBoxLayout *lay2 = new QHBoxLayout;

    QLabel *label = new QLabel("widget twooooooooooooooooooooooooooooooooooooooooooooooooooooooo");

    lay2->addWidget(label);

    lay1->addLayout(lay2);

    window->setLayout(lay1);

    window->show();

    label->setText("foooooooo baaaaaaar");

    QSize sh = lay1->sizeHint();

    QApplication::processEvents();

    // Note that this is not strictly required behaviour - actually

    // the preferred behaviour would be that sizeHint returns

    // the same value regardless of what's lying in the event queue.

    // (i.e. we would check for equality here instead)

    QVERIFY(lay1->sizeHint() != sh);

}

void tst_QBoxLayout::sizeConstraints()

{

    QWidget *window = new QWidget;

    QHBoxLayout *lay = new QHBoxLayout;

    lay->addWidget(new QLabel("foooooooooooooooooooooooooooooooooooo"));

    lay->addWidget(new QLabel("baaaaaaaaaaaaaaaaaaaaaaaaaaaaaar"));

    lay->setSizeConstraint(QLayout::SetFixedSize);

    window->setLayout(lay);

    window->show();

    QApplication::processEvents();

    QSize sh = window->sizeHint();

    lay->takeAt(1);

    QVERIFY(sh.width() >= window->sizeHint().width() &&

            sh.height() >= window->sizeHint().height());

}

void tst_QBoxLayout::setGeometry()

{

    QWidget w;

    QVBoxLayout *lay = new QVBoxLayout;

    lay->setMargin(0);

    lay->setSpacing(0);

    QHBoxLayout *lay2 = new QHBoxLayout;

    QDial *dial = new QDial;

    lay2->addWidget(dial);

    lay2->setAlignment(Qt::AlignTop);

    lay2->setAlignment(Qt::AlignRight);

    lay->addLayout(lay2);

    w.setLayout(lay);

    w.show();

    QRect newGeom(0, 0, 70, 70);

    lay2->setGeometry(newGeom);

    QVERIFY2(newGeom.contains(dial->geometry()), "dial->geometry() should be smaller and within newGeom");

}

void tst_QBoxLayout::setStyleShouldChangeSpacing()

{

    QWidget *window = new QWidget;

    QHBoxLayout *hbox = new QHBoxLayout(window);

    QPushButton *pb1 = new QPushButton(tr("The spacing between this"));

    QPushButton *pb2 = new QPushButton(tr("and this button should depend on the style of the parent widget"));;

    pb1->setAttribute(Qt::WA_LayoutUsesWidgetRect);

    pb2->setAttribute(Qt::WA_LayoutUsesWidgetRect);

    hbox->addWidget(pb1);

    hbox->addWidget(pb2);

    CustomLayoutStyle *style1 = new CustomLayoutStyle;

    style1->hspacing = 6;

    window->setStyle(style1);

    window->show();

    QTest::qWait(100);

    int spacing = pb2->geometry().left() - pb1->geometry().right() - 1;

    QCOMPARE(spacing, 6);

    CustomLayoutStyle *style2 = new CustomLayoutStyle();

    style2->hspacing = 10;

    window->setStyle(style2);

    QTest::qWait(100);

    spacing = pb2->geometry().left() - pb1->geometry().right() - 1;

    QCOMPARE(spacing, 10);

    delete window;

    delete style1;

    delete style2;

}

QTEST_MAIN(tst_QBoxLayout)

#include "tst_qboxlayout.moc"