tst_qareaseries.cpp

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// Copyright (C) 2017 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QtTest/QtTest>

#include <QtGui/QImage>

#include <QtCharts/QChartView>

#include <QtCharts/QAreaSeries>

#include <QtCharts/QLineSeries>

#include <QtCharts/QChartView>

#include <QtCharts/QValueAxis>

#include <tst_definitions.h>

QT_USE_NAMESPACE

class tst_QAreaSeries : public QObject

    Q_OBJECT

public slots:

    void initTestCase();

    void cleanupTestCase();

    void init();

    void cleanup();

private slots:

    void areaSeries();

    void dynamicEdgeSeriesChange();

protected:

    QLineSeries *createUpperSeries();

    QLineSeries *createLowerSeries();

    void checkPixels(const QColor &upperColor, const QColor &centerColor, const QColor &lowerColor);

    QChartView *m_view;

    QChart *m_chart;

    QColor m_brushColor;

    QColor m_backgroundColor;

    QValueAxis *m_axisX;

    QValueAxis *m_axisY;

};

void tst_QAreaSeries::initTestCase()

    m_brushColor = QColor("#123456");

    m_backgroundColor = QColor("#abcfef");

void tst_QAreaSeries::cleanupTestCase()

    QTest::qWait(1); // Allow final deleteLaters to run

void tst_QAreaSeries::init()

    m_view = new QChartView(newQChartOrQPolarChart());

    m_view->setGeometry(0, 0, 400, 400);

    m_chart = m_view->chart();

    m_chart->setBackgroundBrush(m_backgroundColor);

    m_chart->legend()->setVisible(false);

    m_axisX = new QValueAxis;

    m_axisY = new QValueAxis;

    m_axisX->setRange(0, 4);

    m_axisY->setRange(0, 10);

    // Hide axes so they don't confuse color checks

    m_axisX->setVisible(false);

    m_axisY->setVisible(false);

    m_chart->addAxis(m_axisX, Qt::AlignBottom);

    m_chart->addAxis(m_axisY, Qt::AlignRight);

void tst_QAreaSeries::cleanup()

    delete m_view;

    m_view = 0;

    m_chart = 0;

void tst_QAreaSeries::areaSeries()

    QLineSeries *series0 = createUpperSeries();

    QLineSeries *series1 = createLowerSeries();

    QAreaSeries *series = new QAreaSeries(series0, series1);

    QCOMPARE(series->brush(), QBrush());

    QCOMPARE(series->pen(), QPen());

    QCOMPARE(series->pointsVisible(), false);

    QCOMPARE(series->pointLabelsVisible(), false);

    QCOMPARE(series->pointLabelsFormat(), QLatin1String("@xPoint, @yPoint"));

    QCOMPARE(series->pointLabelsClipping(), true);

    QCOMPARE(series->pointLabelsColor(), QPen().color());

    QCOMPARE(series->upperSeries(), series0);

    QCOMPARE(series->lowerSeries(), series1);

    QCOMPARE(series->color(), QPen().color());

    QCOMPARE(series->borderColor(), QPen().color());

    series->setBrush(QBrush(m_brushColor));

    m_chart->addSeries(series);

    series->attachAxis(m_axisX);

    series->attachAxis(m_axisY);

    m_view->show();

    QVERIFY(QTest::qWaitForWindowExposed(m_view));

    checkPixels(m_backgroundColor, m_brushColor, m_backgroundColor);

void tst_QAreaSeries::dynamicEdgeSeriesChange()

    QAreaSeries *series = new QAreaSeries;

    series->setBrush(QBrush(m_brushColor));

    m_chart->addSeries(series);

    series->attachAxis(m_axisX);

    series->attachAxis(m_axisY);

    m_view->show();

    QVERIFY(QTest::qWaitForWindowExposed(m_view));

    checkPixels(m_backgroundColor, m_backgroundColor, m_backgroundColor);

    QLineSeries *series0 = createUpperSeries();

    series->setUpperSeries(series0);

    QApplication::processEvents();

    checkPixels(m_backgroundColor, m_brushColor, m_brushColor);

    QLineSeries *series1 = createLowerSeries();

    series->setLowerSeries(series1);

    QApplication::processEvents();

    checkPixels(m_backgroundColor, m_brushColor, m_backgroundColor);

    series->setLowerSeries(nullptr);

    QApplication::processEvents();

    checkPixels(m_backgroundColor, m_brushColor, m_brushColor);

    series->setUpperSeries(nullptr);

    QApplication::processEvents();

    checkPixels(m_backgroundColor, m_backgroundColor, m_backgroundColor);

QLineSeries *tst_QAreaSeries::createUpperSeries()

    QLineSeries *series = new QLineSeries();

    *series << QPointF(0, 10) << QPointF(1, 7) << QPointF(2, 6) << QPointF(3, 7) << QPointF(4, 10);

    return series;

QLineSeries *tst_QAreaSeries::createLowerSeries()

    QLineSeries *series = new QLineSeries();

    *series << QPointF(0, 0) << QPointF(1, 3) << QPointF(2, 4) << QPointF(3, 3) << QPointF(4, 0);

    return series;

void tst_QAreaSeries::checkPixels(const QColor &upperColor,

                                  const QColor &centerColor,

                                  const QColor &lowerColor)

    const QImage screenGrab = m_view->grab().toImage();

    const qreal dpr = screenGrab.devicePixelRatio();

    const auto sampleColor = [&](int logicalX, int logicalY) {

        return QColor(screenGrab.pixel(qRound(logicalX * dpr), qRound(logicalY * dpr)));

};

    QCOMPARE(sampleColor(200, 50), upperColor);

    QCOMPARE(sampleColor(200, 200), centerColor);

    QCOMPARE(sampleColor(200, 350), lowerColor);

QTEST_MAIN(tst_QAreaSeries)

#include "tst_qareaseries.moc"