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#include <QtTest/QtTest>

#include <QLineEdit>

#include <QStackedLayout>

#include <qapplication.h>

#include <qwidget.h>

#include <QPushButton>

#include "../../shared/util.h"

//TESTED_CLASS=

//TESTED_FILES=gui/kernel/qlayout.cpp gui/kernel/qlayout.h

class tst_QStackedLayout : public QObject

{

    Q_OBJECT

public:

    tst_QStackedLayout();

    virtual ~tst_QStackedLayout();

public slots:

    void initTestCase();

    void cleanupTestCase();

    void init();

    void cleanup();

private slots:

    void getSetCheck();

    void testCase();

    void deleteCurrent();

    void removeWidget();

    void keepFocusAfterSetCurrent();

private:

    QWidget *testWidget;

};

// Testing get/set functions

void tst_QStackedLayout::getSetCheck()

{

    QStackedLayout obj1;

    // int QStackedLayout::currentIndex()

    // void QStackedLayout::setCurrentIndex(int)

    obj1.setCurrentIndex(0);

    QCOMPARE(-1, obj1.currentIndex());

    obj1.setCurrentIndex(INT_MIN);

    QCOMPARE(-1, obj1.currentIndex());

    obj1.setCurrentIndex(INT_MAX);

    QCOMPARE(-1, obj1.currentIndex());

    // QWidget * QStackedLayout::currentWidget()

    // void QStackedLayout::setCurrentWidget(QWidget *)

    QWidget *var2 = new QWidget();

    obj1.addWidget(var2);

    obj1.setCurrentWidget(var2);

    QCOMPARE(var2, obj1.currentWidget());

    obj1.setCurrentWidget((QWidget *)0);

    QCOMPARE(obj1.currentWidget(), var2);

    delete var2;

}

tst_QStackedLayout::tst_QStackedLayout()

    : testWidget(0)

{

}

tst_QStackedLayout::~tst_QStackedLayout()

{

}

void tst_QStackedLayout::initTestCase()

{

}

void tst_QStackedLayout::cleanupTestCase()

{

}

void tst_QStackedLayout::init()

{

    if (testWidget) {

        delete testWidget;

        testWidget = 0;

    }

    testWidget = new QWidget(0);

    testWidget->resize( 200, 200 );

    testWidget->show();

    // make sure the tests work with focus follows mouse

    QCursor::setPos(testWidget->geometry().center());

    testWidget->activateWindow();

    QApplication::syncX();

    QTest::qWait(250);

}

void tst_QStackedLayout::cleanup()

{

    delete testWidget;

    testWidget = 0;

}

void tst_QStackedLayout::testCase()

{

    QStackedLayout onStack(testWidget);

    QStackedLayout *testLayout = &onStack;

    testWidget->setLayout(testLayout);

    QSignalSpy spy(testLayout,SIGNAL(currentChanged(int)));

    // Nothing in layout

    QCOMPARE(testLayout->currentIndex(), -1);

    QCOMPARE(testLayout->currentWidget(), static_cast<QWidget*>(0));

    QCOMPARE(testLayout->count(), 0);

    // One widget added to layout

    QWidget *w1 = new QWidget(testWidget);

    testLayout->addWidget(w1);

    QCOMPARE(spy.count(), 1);

    QCOMPARE(spy.at(0).at(0).toInt(), 0);

    spy.clear();

    QCOMPARE(testLayout->currentIndex(), 0);

    QCOMPARE(testLayout->currentWidget(), w1);

    QCOMPARE(testLayout->count(), 1);

    // Another widget added to layout

    QWidget *w2 = new QWidget(testWidget);

    testLayout->addWidget(w2);

    QCOMPARE(testLayout->currentIndex(), 0);

    QCOMPARE(testLayout->currentWidget(), w1);

    QCOMPARE(testLayout->indexOf(w2), 1);

    QCOMPARE(testLayout->count(), 2);

    // Change the current index

    testLayout->setCurrentIndex(1);

    QCOMPARE(spy.count(), 1);

    QCOMPARE(spy.at(0).at(0).toInt(), 1);

    spy.clear();

    QCOMPARE(testLayout->currentIndex(), 1);

    QCOMPARE(testLayout->currentWidget(), w2);

    // First widget removed from layout

    testLayout->removeWidget(w1);

    QCOMPARE(testLayout->currentIndex(), 0);

    QCOMPARE(testLayout->currentWidget(), w2);

    QCOMPARE(testLayout->count(), 1);

    // Second widget removed from layout; back to nothing

    testLayout->removeWidget(w2);

    QCOMPARE(spy.count(), 1);

    QCOMPARE(spy.at(0).at(0).toInt(), -1);

    spy.clear();

    QCOMPARE(testLayout->currentIndex(), -1);

    QCOMPARE(testLayout->currentWidget(), static_cast<QWidget*>(0));

    QCOMPARE(testLayout->count(), 0);

    // Another widget inserted at current index.

    // Current index should become current index + 1, but the

    // current widget should stay the same

    testLayout->addWidget(w1);

    QCOMPARE(testLayout->currentIndex(), 0);

    QCOMPARE(testLayout->currentWidget(), w1);

    testLayout->insertWidget(0, w2);

    QCOMPARE(testLayout->currentIndex(), 1);

    QCOMPARE(testLayout->currentWidget(), w1);

    QVERIFY(w1->isVisible());

    QVERIFY(!w2->isVisible());

    testLayout->setCurrentWidget(w2);

    // Another widget added, so we have: w2, w1, w3 with w2 current

    QWidget *w3 = new QWidget(testWidget);

    testLayout->addWidget(w3);

    QCOMPARE(testLayout->indexOf(w2), 0);

    QCOMPARE(testLayout->indexOf(w1), 1);

    QCOMPARE(testLayout->indexOf(w3), 2);

    // Set index to 1 and remove that widget (w1).

    // Then, current index should still be 1, but w3

    // should be the new current widget.

    testLayout->setCurrentIndex(1);

    testLayout->removeWidget(w1);

    QCOMPARE(testLayout->currentIndex(), 1);

    QCOMPARE(testLayout->currentWidget(), w3);

    QVERIFY(w3->isVisible());

    // Remove the current widget (w3).

    // Since it's the last one in the list, current index should now

    // become 0 and w2 becomes the current widget.

    testLayout->removeWidget(w3);

    QCOMPARE(testLayout->currentIndex(), 0);

    QCOMPARE(testLayout->currentWidget(), w2);

    QVERIFY(w2->isVisible());

    // Make sure index is decremented when we remove a widget at index < current index

    testLayout->addWidget(w1);

    testLayout->addWidget(w3);

    testLayout->setCurrentIndex(2);

    testLayout->removeWidget(w2); // At index 0

    QCOMPARE(testLayout->currentIndex(), 1);

    QCOMPARE(testLayout->currentWidget(), w3);

    QVERIFY(w3->isVisible());

    testLayout->removeWidget(w1); // At index 0

    QCOMPARE(testLayout->currentIndex(), 0);

    QCOMPARE(testLayout->currentWidget(), w3);

    QVERIFY(w3->isVisible());

    testLayout->removeWidget(w3);

    QCOMPARE(testLayout->currentIndex(), -1);

    QCOMPARE(testLayout->currentWidget(), static_cast<QWidget*>(0));

}

void tst_QStackedLayout::deleteCurrent()

{

    QStackedLayout *testLayout = new QStackedLayout(testWidget);

    QWidget *w1 = new QWidget;

    testLayout->addWidget(w1);

    QWidget *w2 = new QWidget;

    testLayout->addWidget(w2);

    QCOMPARE(testLayout->currentWidget(), w1);

    delete testLayout->currentWidget();

    QCOMPARE(testLayout->currentWidget(), w2);

}

void tst_QStackedLayout::removeWidget()

{

    if (testWidget->layout()) delete testWidget->layout();

    QVBoxLayout *vbox = new QVBoxLayout(testWidget);

    QPushButton *top = new QPushButton("top", testWidget);  //add another widget that can receive focus

    top->setObjectName("top");

    vbox->addWidget(top);

    QStackedLayout *testLayout = new QStackedLayout();

    QPushButton *w1 = new QPushButton("1st", testWidget);

    w1->setObjectName("1st");

    testLayout->addWidget(w1);

    QPushButton *w2 = new QPushButton("2nd", testWidget);

    w2->setObjectName("2nd");

    testLayout->addWidget(w2);

    vbox->addLayout(testLayout);

    top->setFocus();

    QTest::qWait(100);

    top->activateWindow();

    QTest::qWait(100);

    int i =0;

    for (;;) {

        if (QApplication::focusWidget() == top)

            break;

        else if (i >= 5)

            QSKIP("Can't get focus", SkipSingle);

        QTest::qWait(100);

        ++i;

    }

    QCOMPARE(QApplication::focusWidget(), static_cast<QWidget *>(top));

    // focus should stay at the 'top' widget

    testLayout->removeWidget(w1);

    QCOMPARE(QApplication::focusWidget(), static_cast<QWidget *>(top));

}

class LineEdit : public QLineEdit

{

public:

    LineEdit() : hasFakeEditFocus(false)

    { }

    bool hasFakeEditFocus;

protected:

    bool isSingleFocusWidget() const

    {

        const QWidget *w = this;

        while ((w = w->nextInFocusChain()) != this) {

            if (w->isVisible() && static_cast<const QWidget*>(w->focusProxy()) != this

                && w->focusPolicy() & Qt::TabFocus) {

                return false;

            }

        }

        return true;

    }

    void focusInEvent(QFocusEvent *event)

    {

        QLineEdit::focusInEvent(event);

        hasFakeEditFocus = isSingleFocusWidget();

    }

    void focusOutEvent(QFocusEvent *event)

    {

        hasFakeEditFocus = false;

        QLineEdit::focusOutEvent(event);

    }

};

void tst_QStackedLayout::keepFocusAfterSetCurrent()

{

    if (testWidget->layout()) delete testWidget->layout();

    QStackedLayout *stackLayout = new QStackedLayout(testWidget);

    testWidget->setFocusPolicy(Qt::NoFocus);

    LineEdit *edit1 = new LineEdit;

    LineEdit *edit2 = new LineEdit;

    stackLayout->addWidget(edit1);

    stackLayout->addWidget(edit2);

    stackLayout->setCurrentIndex(0);

    testWidget->show();

    QApplication::setActiveWindow(testWidget);

    QTest::qWaitForWindowShown(testWidget);

    QApplication::processEvents();

    edit1->setFocus();

    edit1->activateWindow();

    QTest::qWait(25);

    QTRY_VERIFY(edit1->hasFocus());

    stackLayout->setCurrentIndex(1);

    QVERIFY(!edit1->hasFocus());

    QVERIFY(edit2->hasFocus());

    QVERIFY(edit2->hasFakeEditFocus);

}

QTEST_MAIN(tst_QStackedLayout)

#include "tst_qstackedlayout.moc"