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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "themewidget.h"
#include "ui_themewidget.h"
#include <QAbstractBarSeries>
#include <QAreaSeries>
#include <QBarSet>
#include <QChartView>
#include <QCheckBox>
#include <QComboBox>
#include <QGridLayout>
#include <QLegend>
#include <QLineSeries>
#include <QPercentBarSeries>
#include <QPieSeries>
#include <QPieSlice>
#include <QRandomGenerator>
#include <QScatterSeries>
#include <QSplineSeries>
#include <QStackedBarSeries>
#include <QValueAxis>
ThemeWidget::ThemeWidget(QWidget *parent) :
ContentWidget(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(), this);
m_ui->gridLayout->addWidget(chartView, 1, 0);
m_charts << chartView;
chartView = new QChartView(createPieChart(), this);
// 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;
//![5]
chartView = new QChartView(createLineChart(), this);
m_ui->gridLayout->addWidget(chartView, 1, 2);
//![5]
m_charts << chartView;
chartView = new QChartView(createBarChart(m_valueCount), this);
m_ui->gridLayout->addWidget(chartView, 2, 0);
m_charts << chartView;
chartView = new QChartView(createSplineChart(), this);
m_ui->gridLayout->addWidget(chartView, 2, 1);
m_charts << chartView;
chartView = new QChartView(createScatterChart(), this);
m_ui->gridLayout->addWidget(chartView, 2, 2);
m_charts << chartView;
// Set defaults
m_ui->antialiasCheckBox->setChecked(true);
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
{
auto chart = new QChart;
chart->setTitle("Area Chart");
// The lower series initialized to zero values
QLineSeries *lowerSeries = nullptr;
QString name("Series ");
int nameIndex = 0;
for (int i(0); i < m_dataTable.count(); i++) {
auto upperSeries = new QLineSeries(chart);
for (int j(0); j < m_dataTable[i].count(); j++) {
Data data = m_dataTable[i].at(j);
if (lowerSeries) {
const auto &points = lowerSeries->points();
upperSeries->append(QPointF(j, points[i].y() + data.first.y()));
} else {
upperSeries->append(QPointF(j, data.first.y()));
}
}
auto 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
auto 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);
auto chart = new QChart;
chart->setTitle("Bar Chart");
auto series = new QStackedBarSeries(chart);
for (int i(0); i < m_dataTable.count(); i++) {
auto 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
auto axisY = qobject_cast<QValueAxis *>(chart->axes(Qt::Vertical).first());
Q_ASSERT(axisY);
axisY->setLabelFormat("%.1f ");
return chart;
}
QChart *ThemeWidget::createLineChart() const
{
//![1]
auto chart = new QChart;
chart->setTitle("Line Chart");
//![1]
//![2]
QString name("Series ");
int nameIndex = 0;
for (const DataList &list : m_dataTable) {
auto series = new QLineSeries(chart);
for (const Data &data : list)
series->append(data.first);
series->setName(name + QString::number(nameIndex));
nameIndex++;
chart->addSeries(series);
}
//![2]
//![3]
chart->createDefaultAxes();
chart->axes(Qt::Horizontal).first()->setRange(0, m_valueMax);
chart->axes(Qt::Vertical).first()->setRange(0, m_valueCount);
//![3]
//![4]
// Add space to label to add space between labels and axis
auto axisY = qobject_cast<QValueAxis *>(chart->axes(Qt::Vertical).first());
Q_ASSERT(axisY);
axisY->setLabelFormat("%.1f ");
//![4]
return chart;
}
QChart *ThemeWidget::createPieChart() const
{
auto chart = new QChart;
chart->setTitle("Pie Chart");
auto 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
{
auto chart = new QChart;
chart->setTitle("Spline Chart");
QString name("Series ");
int nameIndex = 0;
for (const DataList &list : m_dataTable) {
auto 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
auto axisY = qobject_cast<QValueAxis *>(chart->axes(Qt::Vertical).first());
Q_ASSERT(axisY);
axisY->setLabelFormat("%.1f ");
return chart;
}
QChart *ThemeWidget::createScatterChart() const
{
// scatter chart
auto chart = new QChart;
chart->setTitle("Scatter Chart");
QString name("Series ");
int nameIndex = 0;
for (const DataList &list : m_dataTable) {
auto 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
auto axisY = qobject_cast<QValueAxis *>(chart->axes(Qt::Vertical).first());
Q_ASSERT(axisY);
axisY->setLabelFormat("%.1f ");
return chart;
}
void ThemeWidget::updateUI()
{
//![6]
auto theme = static_cast<QChart::ChartTheme>(
m_ui->themeComboBox->itemData(m_ui->themeComboBox->currentIndex()).toInt());
//![6]
const auto charts = m_charts;
if (!m_charts.isEmpty() && m_charts.at(0)->chart()->theme() != theme) {
for (QChartView *chartView : charts) {
//![7]
chartView->chart()->setTheme(theme);
//![7]
}
}
// Update antialiasing
//![11]
bool checked = m_ui->antialiasCheckBox->isChecked();
for (QChartView *chart : charts)
chart->setRenderHint(QPainter::Antialiasing, checked);
//![11]
// Update animation options
//![9]
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);
}
//![9]
// Update legend alignment
//![10]
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();
}
}
//![10]
}