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    41 

    42 

    43 #include <QtTest/QtTest>

    44 #include <QScrollBar>

    45 #include <QStyleOptionSlider>

    46 #include <QScrollArea>

    47 

    48 class tst_QScrollBar : public QObject

    49 {

    50     Q_OBJECT

    51 public slots:

    52     void initTestCase();

    53     void cleanupTestCase();

    54     void hideAndShow(int action);

    55 

    56 private slots:

    57     void scrollSingleStep();

    58     void task_209492();

    59 

    60 private:

    61     QScrollBar *testWidget;

    62 };

    63 

    64 void tst_QScrollBar::initTestCase()

    65 {

    66     testWidget = new QScrollBar(Qt::Horizontal);

    67     testWidget->resize(100, testWidget->height());

    68     testWidget->show();

    69 }

    70 

    71 void tst_QScrollBar::cleanupTestCase()

    72 {

    73     delete testWidget;

    74     testWidget = 0;

    75 }

    76 

    77 void tst_QScrollBar::hideAndShow(int)

    78 {

    79     testWidget->hide();

    80     testWidget->show();

    81 }

    82 

    83 // Check that the scrollbar doesn't scroll after calling hide and show

    84 // from a slot connected to the scrollbar's actionTriggered signal.

    85 void tst_QScrollBar::scrollSingleStep()

    86 {

    87     testWidget->setValue(testWidget->minimum());

    88     QCOMPARE(testWidget->value(), testWidget->minimum());

    89     connect(testWidget, SIGNAL(actionTriggered(int)), this, SLOT(hideAndShow(int)));

    90 

    91     // Get rect for the area to click on

    92     const QStyleOptionSlider opt = qt_qscrollbarStyleOption(testWidget);

    93     QRect sr = testWidget->style()->subControlRect(QStyle::CC_ScrollBar, &opt,

    94                                                    QStyle::SC_ScrollBarAddLine, testWidget);

    95 

    96     if (!sr.isValid())

    97         QSKIP("SC_ScrollBarAddLine not valid",  SkipAll);

    98 

    99     QTest::mouseClick(testWidget, Qt::LeftButton, Qt::NoModifier, QPoint(sr.x(), sr.y()));

   100     QTest::qWait(510); // initial delay is 500 for setRepeatAction

   101     disconnect(testWidget, SIGNAL(actionTriggered(int)), 0, 0);

   102     QCOMPARE(testWidget->value(), testWidget->singleStep());

   103 }

   104 

   105 void tst_QScrollBar::task_209492()

   106 {

   107     class MyScrollArea : public QScrollArea

   108     {

   109     public:

   110         int scrollCount;

   111         MyScrollArea(QWidget *parent = 0) : QScrollArea(parent), scrollCount(0) {}

   112     protected:

   113         void paintEvent(QPaintEvent *) { QTest::qSleep(600); }

   114         void scrollContentsBy(int, int) { ++scrollCount; viewport()->update(); }

   115     };

   116 

   117     MyScrollArea scrollArea;

   118     QScrollBar *verticalScrollBar = scrollArea.verticalScrollBar();

   119     verticalScrollBar->setRange(0, 1000);

   120     scrollArea.show();

   121     QTest::qWait(300);

   122 

   123     QSignalSpy spy(verticalScrollBar, SIGNAL(actionTriggered(int)));

   124     QCOMPARE(scrollArea.scrollCount, 0);

   125     QCOMPARE(spy.count(), 0);

   126 

   127     // Simulate a mouse click on the "scroll down button".

   128     const QPoint pressPoint(verticalScrollBar->width() / 2, verticalScrollBar->height() - 10);

   129     const QPoint globalPressPoint = verticalScrollBar->mapToGlobal(globalPressPoint);

   130     QMouseEvent mousePressEvent(QEvent::MouseButtonPress, pressPoint, globalPressPoint,

   131                                 Qt::LeftButton, Qt::LeftButton, 0);

   132     QApplication::sendEvent(verticalScrollBar, &mousePressEvent);

   133     QTest::qWait(50);

   134     QMouseEvent mouseReleaseEvent(QEvent::MouseButtonRelease, pressPoint, globalPressPoint,

   135                                   Qt::LeftButton, Qt::LeftButton, 0);

   136     QApplication::sendEvent(verticalScrollBar, &mouseReleaseEvent);

   137 

   138     // Check that the action was triggered once.

   139 #ifdef Q_WS_MAC

   140     QEXPECT_FAIL("", "Fix does does not work on Mac due to paint architechure differences.", Abort);

   141 #endif

   142     QCOMPARE(scrollArea.scrollCount, 1);

   143     QCOMPARE(spy.count(), 1);

   144 }

   145 

   146 QTEST_MAIN(tst_QScrollBar)

   147 #include "tst_qscrollbar.moc"