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 "ui_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/QRandomGenerator> #include <QtCharts/QBarCategoryAxis> #include <QtWidgets/QApplication> #include <QtCharts/QValueAxis> 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_ui(new Ui_ThemeWidgetForm) { m_ui->setupUi(this); populateThemeBox(); populateAnimationBox(); populateLegendBox(); //create charts QChartView *chartView; chartView = new QChartView(createAreaChart()); m_ui->gridLayout->addWidget(chartView, 1, 0); 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); m_ui->gridLayout->addWidget(chartView, 1, 1); m_charts << chartView; chartView = new QChartView(createLineChart()); m_ui->gridLayout->addWidget(chartView, 1, 2); m_charts << chartView; chartView = new QChartView(createBarChart(m_valueCount)); m_ui->gridLayout->addWidget(chartView, 2, 0); m_charts << chartView; chartView = new QChartView(createSplineChart()); m_ui->gridLayout->addWidget(chartView, 2, 1); m_charts << chartView; chartView = new QChartView(createScatterChart()); m_ui->gridLayout->addWidget(chartView, 2, 2); m_charts << chartView; // Set defaults m_ui->antialiasCheckBox->setChecked(true); // Set the colors from the light theme as default ones QPalette pal = qApp->palette(); pal.setColor(QPalette::Window, QRgb(0xf0f0f0)); pal.setColor(QPalette::WindowText, QRgb(0x404044)); qApp->setPalette(pal); updateUI(); } ThemeWidget::~ThemeWidget() { delete m_ui; } DataTable ThemeWidget::generateRandomData(int listCount, int valueMax, int valueCount) const { DataTable dataTable; // generate random data for (int i(0); i < listCount; i++) { DataList dataList; qreal yValue(0); for (int j(0); j < valueCount; j++) { yValue = yValue + QRandomGenerator::global()->bounded(valueMax / (qreal) valueCount); QPointF value((j + QRandomGenerator::global()->generateDouble()) * ((qreal) m_valueMax / (qreal) valueCount), yValue); QString label = "Slice " + QString::number(i) + ":" + QString::number(j); dataList << Data(value, label); } dataTable << dataList; } return dataTable; } void ThemeWidget::populateThemeBox() { // add items to theme combobox m_ui->themeComboBox->addItem("Light", QChart::ChartThemeLight); m_ui->themeComboBox->addItem("Blue Cerulean", QChart::ChartThemeBlueCerulean); m_ui->themeComboBox->addItem("Dark", QChart::ChartThemeDark); m_ui->themeComboBox->addItem("Brown Sand", QChart::ChartThemeBrownSand); m_ui->themeComboBox->addItem("Blue NCS", QChart::ChartThemeBlueNcs); m_ui->themeComboBox->addItem("High Contrast", QChart::ChartThemeHighContrast); m_ui->themeComboBox->addItem("Blue Icy", QChart::ChartThemeBlueIcy); m_ui->themeComboBox->addItem("Qt", QChart::ChartThemeQt); } void ThemeWidget::populateAnimationBox() { // add items to animation combobox m_ui->animatedComboBox->addItem("No Animations", QChart::NoAnimation); m_ui->animatedComboBox->addItem("GridAxis Animations", QChart::GridAxisAnimations); m_ui->animatedComboBox->addItem("Series Animations", QChart::SeriesAnimations); m_ui->animatedComboBox->addItem("All Animations", QChart::AllAnimations); } void ThemeWidget::populateLegendBox() { // add items to legend combobox m_ui->legendComboBox->addItem("No Legend ", 0); m_ui->legendComboBox->addItem("Legend Top", Qt::AlignTop); m_ui->legendComboBox->addItem("Legend Bottom", Qt::AlignBottom); m_ui->legendComboBox->addItem("Legend Left", Qt::AlignLeft); m_ui->legendComboBox->addItem("Legend Right", Qt::AlignRight); } 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); lowerSeries = upperSeries; } chart->createDefaultAxes(); chart->axes(Qt::Horizontal).first()->setRange(0, m_valueCount - 1); chart->axes(Qt::Vertical).first()->setRange(0, m_valueMax); // Add space to label to add space between labels and axis QValueAxis *axisY = qobject_cast<QValueAxis*>(chart->axes(Qt::Vertical).first()); Q_ASSERT(axisY); axisY->setLabelFormat("%.1f "); 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(); chart->axes(Qt::Vertical).first()->setRange(0, m_valueMax * 2); // Add space to label to add space between labels and axis QValueAxis *axisY = qobject_cast<QValueAxis*>(chart->axes(Qt::Vertical).first()); Q_ASSERT(axisY); axisY->setLabelFormat("%.1f "); 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(); chart->axes(Qt::Horizontal).first()->setRange(0, m_valueMax); chart->axes(Qt::Vertical).first()->setRange(0, m_valueCount); // Add space to label to add space between labels and axis QValueAxis *axisY = qobject_cast<QValueAxis*>(chart->axes(Qt::Vertical).first()); Q_ASSERT(axisY); axisY->setLabelFormat("%.1f "); return chart; } QChart *ThemeWidget::createPieChart() const { QChart *chart = new QChart(); chart->setTitle("Pie chart"); QPieSeries *series = new QPieSeries(chart); for (const Data &data : m_dataTable[0]) { QPieSlice *slice = series->append(data.second, data.first.y()); if (data == m_dataTable[0].first()) { // Show the first slice exploded with label slice->setLabelVisible(); slice->setExploded(); slice->setExplodeDistanceFactor(0.5); } } series->setPieSize(0.4); chart->addSeries(series); return chart; } QChart *ThemeWidget::createSplineChart() const { 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(); chart->axes(Qt::Horizontal).first()->setRange(0, m_valueMax); chart->axes(Qt::Vertical).first()->setRange(0, m_valueCount); // Add space to label to add space between labels and axis QValueAxis *axisY = qobject_cast<QValueAxis*>(chart->axes(Qt::Vertical).first()); Q_ASSERT(axisY); axisY->setLabelFormat("%.1f "); 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(); chart->axes(Qt::Horizontal).first()->setRange(0, m_valueMax); chart->axes(Qt::Vertical).first()->setRange(0, m_valueCount); // Add space to label to add space between labels and axis QValueAxis *axisY = qobject_cast<QValueAxis*>(chart->axes(Qt::Vertical).first()); Q_ASSERT(axisY); axisY->setLabelFormat("%.1f "); return chart; } void ThemeWidget::updateUI() { QChart::ChartTheme theme = static_cast<QChart::ChartTheme>( m_ui->themeComboBox->itemData(m_ui->themeComboBox->currentIndex()).toInt()); const auto charts = m_charts; if (!m_charts.isEmpty() && m_charts.at(0)->chart()->theme() != theme) { for (QChartView *chartView : charts) { chartView->chart()->setTheme(theme); } // Set palette colors based on selected 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); } // Update antialiasing bool checked = m_ui->antialiasCheckBox->isChecked(); for (QChartView *chart : charts) chart->setRenderHint(QPainter::Antialiasing, checked); // Update animation options QChart::AnimationOptions options( m_ui->animatedComboBox->itemData(m_ui->animatedComboBox->currentIndex()).toInt()); if (!m_charts.isEmpty() && m_charts.at(0)->chart()->animationOptions() != options) { for (QChartView *chartView : charts) chartView->chart()->setAnimationOptions(options); } // Update legend alignment Qt::Alignment alignment( m_ui->legendComboBox->itemData(m_ui->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(); } } }