themewidget.cpp Example File

chartthemes/themewidget.cpp
/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt Charts module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:GPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3 or (at your option) any later version ** approved by the KDE Free Qt Foundation. The licenses are as published by ** the Free Software Foundation and appearing in the file LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/
#include "themewidget.h" #include <QtCharts/QChartView> #include <QtCharts/QPieSeries> #include <QtCharts/QPieSlice> #include <QtCharts/QAbstractBarSeries> #include <QtCharts/QPercentBarSeries> #include <QtCharts/QStackedBarSeries> #include <QtCharts/QBarSeries> #include <QtCharts/QBarSet> #include <QtCharts/QLineSeries> #include <QtCharts/QSplineSeries> #include <QtCharts/QScatterSeries> #include <QtCharts/QAreaSeries> #include <QtCharts/QLegend> #include <QtWidgets/QGridLayout> #include <QtWidgets/QFormLayout> #include <QtWidgets/QComboBox> #include <QtWidgets/QSpinBox> #include <QtWidgets/QCheckBox> #include <QtWidgets/QGroupBox> #include <QtWidgets/QLabel> #include <QtCore/QTime> #include <QtCharts/QBarCategoryAxis> ThemeWidget::ThemeWidget(QWidget *parent) : QWidget(parent), m_listCount(3), m_valueMax(10), m_valueCount(7), m_dataTable(generateRandomData(m_listCount, m_valueMax, m_valueCount)), m_themeComboBox(createThemeBox()), m_antialiasCheckBox(new QCheckBox("Anti-aliasing")), m_animatedComboBox(createAnimationBox()), m_legendComboBox(createLegendBox()) { connectSignals(); // create layout QGridLayout *baseLayout = new QGridLayout(); QHBoxLayout *settingsLayout = new QHBoxLayout(); settingsLayout->addWidget(new QLabel("Theme:")); settingsLayout->addWidget(m_themeComboBox); settingsLayout->addWidget(new QLabel("Animation:")); settingsLayout->addWidget(m_animatedComboBox); settingsLayout->addWidget(new QLabel("Legend:")); settingsLayout->addWidget(m_legendComboBox); settingsLayout->addWidget(m_antialiasCheckBox); settingsLayout->addStretch(); baseLayout->addLayout(settingsLayout, 0, 0, 1, 3); //create charts QChartView *chartView; chartView = new QChartView(createAreaChart()); baseLayout->addWidget(chartView, 1, 0); m_charts << chartView; chartView = new QChartView(createBarChart(m_valueCount)); baseLayout->addWidget(chartView, 1, 1); m_charts << chartView; chartView = new QChartView(createLineChart()); baseLayout->addWidget(chartView, 1, 2); m_charts << chartView; chartView = new QChartView(createPieChart()); // Funny things happen if the pie slice labels do not fit the screen, so we ignore size policy chartView->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); baseLayout->addWidget(chartView, 2, 0); m_charts << chartView; chartView = new QChartView(createSplineChart()); baseLayout->addWidget(chartView, 2, 1); m_charts << chartView; chartView = new QChartView(createScatterChart()); baseLayout->addWidget(chartView, 2, 2); m_charts << chartView; setLayout(baseLayout); // Set defaults m_antialiasCheckBox->setChecked(true); updateUI(); } ThemeWidget::~ThemeWidget() { } void ThemeWidget::connectSignals() { connect(m_themeComboBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &ThemeWidget::updateUI); connect(m_antialiasCheckBox, &QCheckBox::toggled, this, &ThemeWidget::updateUI); connect(m_animatedComboBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &ThemeWidget::updateUI); connect(m_legendComboBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &ThemeWidget::updateUI); } DataTable ThemeWidget::generateRandomData(int listCount, int valueMax, int valueCount) const { DataTable dataTable; // set seed for random stuff qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime())); // generate random data for (int i(0); i < listCount; i++) { DataList dataList; qreal yValue(0); for (int j(0); j < valueCount; j++) { yValue = yValue + (qreal)(qrand() % valueMax) / (qreal) valueCount; QPointF value((j + (qreal) rand() / (qreal) RAND_MAX) * ((qreal) m_valueMax / (qreal) valueCount), yValue); QString label = "Slice " + QString::number(i) + ":" + QString::number(j); dataList << Data(value, label); } dataTable << dataList; } return dataTable; } QComboBox *ThemeWidget::createThemeBox() const { // settings layout QComboBox *themeComboBox = new QComboBox(); themeComboBox->addItem("Light", QChart::ChartThemeLight); themeComboBox->addItem("Blue Cerulean", QChart::ChartThemeBlueCerulean); themeComboBox->addItem("Dark", QChart::ChartThemeDark); themeComboBox->addItem("Brown Sand", QChart::ChartThemeBrownSand); themeComboBox->addItem("Blue NCS", QChart::ChartThemeBlueNcs); themeComboBox->addItem("High Contrast", QChart::ChartThemeHighContrast); themeComboBox->addItem("Blue Icy", QChart::ChartThemeBlueIcy); themeComboBox->addItem("Qt", QChart::ChartThemeQt); return themeComboBox; } QComboBox *ThemeWidget::createAnimationBox() const { // settings layout QComboBox *animationComboBox = new QComboBox(); animationComboBox->addItem("No Animations", QChart::NoAnimation); animationComboBox->addItem("GridAxis Animations", QChart::GridAxisAnimations); animationComboBox->addItem("Series Animations", QChart::SeriesAnimations); animationComboBox->addItem("All Animations", QChart::AllAnimations); return animationComboBox; } QComboBox *ThemeWidget::createLegendBox() const { QComboBox *legendComboBox = new QComboBox(); legendComboBox->addItem("No Legend ", 0); legendComboBox->addItem("Legend Top", Qt::AlignTop); legendComboBox->addItem("Legend Bottom", Qt::AlignBottom); legendComboBox->addItem("Legend Left", Qt::AlignLeft); legendComboBox->addItem("Legend Right", Qt::AlignRight); return legendComboBox; } QChart *ThemeWidget::createAreaChart() const { QChart *chart = new QChart(); chart->setTitle("Area chart"); // The lower series initialized to zero values QLineSeries *lowerSeries = 0; QString name("Series "); int nameIndex = 0; for (int i(0); i < m_dataTable.count(); i++) { QLineSeries *upperSeries = new QLineSeries(chart); for (int j(0); j < m_dataTable[i].count(); j++) { Data data = m_dataTable[i].at(j); if (lowerSeries) { const QVector<QPointF>& points = lowerSeries->pointsVector(); upperSeries->append(QPointF(j, points[i].y() + data.first.y())); } else { upperSeries->append(QPointF(j, data.first.y())); } } QAreaSeries *area = new QAreaSeries(upperSeries, lowerSeries); area->setName(name + QString::number(nameIndex)); nameIndex++; chart->addSeries(area); chart->createDefaultAxes(); lowerSeries = upperSeries; } return chart; } QChart *ThemeWidget::createBarChart(int valueCount) const { Q_UNUSED(valueCount); QChart *chart = new QChart(); chart->setTitle("Bar chart"); QStackedBarSeries *series = new QStackedBarSeries(chart); for (int i(0); i < m_dataTable.count(); i++) { QBarSet *set = new QBarSet("Bar set " + QString::number(i)); for (const Data &data : m_dataTable[i]) *set << data.first.y(); series->append(set); } chart->addSeries(series); chart->createDefaultAxes(); return chart; } QChart *ThemeWidget::createLineChart() const { QChart *chart = new QChart(); chart->setTitle("Line chart"); QString name("Series "); int nameIndex = 0; for (const DataList &list : m_dataTable) { QLineSeries *series = new QLineSeries(chart); for (const Data &data : list) series->append(data.first); series->setName(name + QString::number(nameIndex)); nameIndex++; chart->addSeries(series); } chart->createDefaultAxes(); return chart; } QChart *ThemeWidget::createPieChart() const { QChart *chart = new QChart(); chart->setTitle("Pie chart"); qreal pieSize = 1.0 / m_dataTable.count(); for (int i = 0; i < m_dataTable.count(); i++) { QPieSeries *series = new QPieSeries(chart); for (const Data &data : m_dataTable[i]) { QPieSlice *slice = series->append(data.second, data.first.y()); if (data == m_dataTable[i].first()) { slice->setLabelVisible(); slice->setExploded(); } } qreal hPos = (pieSize / 2) + (i / (qreal) m_dataTable.count()); series->setPieSize(pieSize); series->setHorizontalPosition(hPos); series->setVerticalPosition(0.5); chart->addSeries(series); } return chart; } QChart *ThemeWidget::createSplineChart() const { // spine chart QChart *chart = new QChart(); chart->setTitle("Spline chart"); QString name("Series "); int nameIndex = 0; for (const DataList &list : m_dataTable) { QSplineSeries *series = new QSplineSeries(chart); for (const Data &data : list) series->append(data.first); series->setName(name + QString::number(nameIndex)); nameIndex++; chart->addSeries(series); } chart->createDefaultAxes(); return chart; } QChart *ThemeWidget::createScatterChart() const { // scatter chart QChart *chart = new QChart(); chart->setTitle("Scatter chart"); QString name("Series "); int nameIndex = 0; for (const DataList &list : m_dataTable) { QScatterSeries *series = new QScatterSeries(chart); for (const Data &data : list) series->append(data.first); series->setName(name + QString::number(nameIndex)); nameIndex++; chart->addSeries(series); } chart->createDefaultAxes(); return chart; } void ThemeWidget::updateUI() { QChart::ChartTheme theme = static_cast<QChart::ChartTheme>( m_themeComboBox->itemData(m_themeComboBox->currentIndex()).toInt()); const auto charts = m_charts; if (m_charts.at(0)->chart()->theme() != theme) { for (QChartView *chartView : charts) chartView->chart()->setTheme(theme); QPalette pal = window()->palette(); if (theme == QChart::ChartThemeLight) { pal.setColor(QPalette::Window, QRgb(0xf0f0f0)); pal.setColor(QPalette::WindowText, QRgb(0x404044)); } else if (theme == QChart::ChartThemeDark) { pal.setColor(QPalette::Window, QRgb(0x121218)); pal.setColor(QPalette::WindowText, QRgb(0xd6d6d6)); } else if (theme == QChart::ChartThemeBlueCerulean) { pal.setColor(QPalette::Window, QRgb(0x40434a)); pal.setColor(QPalette::WindowText, QRgb(0xd6d6d6)); } else if (theme == QChart::ChartThemeBrownSand) { pal.setColor(QPalette::Window, QRgb(0x9e8965)); pal.setColor(QPalette::WindowText, QRgb(0x404044)); } else if (theme == QChart::ChartThemeBlueNcs) { pal.setColor(QPalette::Window, QRgb(0x018bba)); pal.setColor(QPalette::WindowText, QRgb(0x404044)); } else if (theme == QChart::ChartThemeHighContrast) { pal.setColor(QPalette::Window, QRgb(0xffab03)); pal.setColor(QPalette::WindowText, QRgb(0x181818)); } else if (theme == QChart::ChartThemeBlueIcy) { pal.setColor(QPalette::Window, QRgb(0xcee7f0)); pal.setColor(QPalette::WindowText, QRgb(0x404044)); } else { pal.setColor(QPalette::Window, QRgb(0xf0f0f0)); pal.setColor(QPalette::WindowText, QRgb(0x404044)); } window()->setPalette(pal); } bool checked = m_antialiasCheckBox->isChecked(); for (QChartView *chart : charts) chart->setRenderHint(QPainter::Antialiasing, checked); QChart::AnimationOptions options( m_animatedComboBox->itemData(m_animatedComboBox->currentIndex()).toInt()); if (m_charts.at(0)->chart()->animationOptions() != options) { for (QChartView *chartView : charts) chartView->chart()->setAnimationOptions(options); } Qt::Alignment alignment(m_legendComboBox->itemData(m_legendComboBox->currentIndex()).toInt()); if (!alignment) { for (QChartView *chartView : charts) chartView->chart()->legend()->hide(); } else { for (QChartView *chartView : charts) { chartView->chart()->legend()->setAlignment(alignment); chartView->chart()->legend()->show(); } } }