1 files changed, 147 insertions, 0 deletions
diff --git a/examples/charts/chartsgallery/selectedbarwidget.cpp b/examples/charts/chartsgallery/selectedbarwidget.cpp
new file mode 100644
index 00000000..d54d2201
--- /dev/null
+++ b/examples/charts/chartsgallery/selectedbarwidget.cpp
@@ -0,0 +1,147 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include "selectedbarwidget.h"
+
+#include <QBarCategoryAxis>
+#include <QBarSeries>
+#include <QBarSet>
+#include <QChart>
+#include <QChartView>
+#include <QGraphicsLayout>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QValueAxis>
+
+SelectedBarWidget::SelectedBarWidget(QWidget *parent)
+    : ContentWidget(parent)
+{
+    //![1]
+    QBarSet *setChicken = createChickenSet();
+    QBarSet *setPork = createPorkSet();
+    QBarSet *setTurkey = createTurkeySet();
+    QBarSet *setHam = createHamSet();
+    qreal totalSum = setChicken->sum() + setPork->sum() + setTurkey->sum() + setHam->sum();
+    QList<QBarSet *> setList = QList<QBarSet *>{setChicken, setPork, setTurkey, setHam};
+
+    auto series = new QBarSeries;
+    series->append(setList);
+    //![1]
+
+    //![2]
+    auto chart = new QChart;
+    chart->addSeries(series);
+    chart->setTitle(tr("Meat Consumption (Click on bars to select them)"));
+    chart->setAnimationOptions(QChart::SeriesAnimations);
+    chart->legend()->setVisible(true);
+    chart->legend()->setAlignment(Qt::AlignBottom);
+    chart->layout()->setContentsMargins(0, 0, 0, 0);
+    //![2]
+
+    //![3]
+    const auto barSets = series->barSets();
+    for (QBarSet *barSet : barSets)
+        barSet->setSelectedColor(barSet->brush().color().darker());
+    //![3]
+
+    //![4]
+    QStringList categories = createYearCategories();
+    auto axisX = new QBarCategoryAxis;
+    axisX->setCategories(categories);
+    chart->addAxis(axisX, Qt::AlignBottom);
+    series->attachAxis(axisX);
+
+    auto axisY = new QValueAxis;
+    axisY->setRange(0, 20);
+    axisY->setTitleText(tr("Tons"));
+    axisY->setLabelsAngle(-90);
+    axisY->setTitleVisible(true);
+    chart->addAxis(axisY, Qt::AlignLeft);
+    series->attachAxis(axisY);
+    //![4]
+
+    //![5]
+    auto chartView = new QChartView(chart, this);
+    chartView->setRenderHint(QPainter::Antialiasing);
+    //![5]
+
+    //![6]
+    auto labelWidget = new QWidget(this);
+    auto labelLayout = new QHBoxLayout(labelWidget);
+    labelLayout->setAlignment(Qt::AlignCenter);
+
+    auto totalSumLabel = new QLabel(tr("Total sum: %1 T").arg(totalSum), this);
+    labelLayout->addWidget(totalSumLabel);
+    totalSumLabel->setContentsMargins(0, 0, 54, 0);
+
+    auto selectedSumLabel = new QLabel(tr("Selected sum: 0 T"), this);
+    labelLayout->addWidget(selectedSumLabel);
+
+    auto unselectedSumLabel = new QLabel(tr("Unselected sum: %1 T").arg(totalSum), this);
+    labelLayout->addWidget(unselectedSumLabel);
+    unselectedSumLabel->setContentsMargins(54, 0, 0, 0);
+    //![6]
+
+    //![7]
+    QObject::connect(series, &QAbstractBarSeries::clicked, series, [=](int index, QBarSet *set) {
+        set->toggleSelection({index});
+        qreal selectedSum = 0.;
+        for (int i = 0; i < setList.size(); ++i) {
+            auto selectedIndices = setList.at(i)->selectedBars();
+            for (int k = 0; k < selectedIndices.size(); ++k)
+                selectedSum += setList.at(i)->at(selectedIndices.at(k));
+        }
+        selectedSumLabel->setText(tr("Selected sum: %1 T").arg(selectedSum));
+        // Because of rounding errors, selectedSum can result in being bigger than total sum
+        qreal unselectedSum = totalSum - selectedSum < 0 ? 0. : totalSum - selectedSum;
+        unselectedSumLabel->setText(
+            tr("Unselected sum: %1 T")
+                .arg(unselectedSum)
+            );
+    });
+    //![7]
+
+    //![8]
+    auto mainLayout = new QVBoxLayout(this);
+
+    mainLayout->addWidget(chartView);
+    mainLayout->addWidget(labelWidget);
+    //![8]
+}
+
+QBarSet *SelectedBarWidget::createChickenSet()
+{
+    auto set = new QBarSet(tr("Chicken"));
+    set->append({15.0, 12.0, 8.0, 11.5, 13.7});
+    return set;
+}
+
+QBarSet *SelectedBarWidget::createPorkSet()
+{
+    auto set = new QBarSet(tr("Pork"));
+    set->append({9.0, 11.0, 9.0, 7, 12.2});
+    return set;
+}
+
+QBarSet *SelectedBarWidget::createTurkeySet()
+{
+    auto set = new QBarSet(tr("Turkey"));
+    set->append({5.0, 7.6, 9.3, 8, 8.1});
+    return set;
+}
+
+QBarSet *SelectedBarWidget::createHamSet()
+{
+    auto set = new QBarSet(tr("Ham"));
+    set->append({5.4, 7.1, 9.3, 12.3, 11.3});
+    return set;
+}
+
+QStringList SelectedBarWidget::createYearCategories()
+{
+    return QStringList{tr("2017"),
+                       tr("2018"),
+                       tr("2019"),
+                       tr("2020"),
+                       tr("2021")};
+}