#include <QApplication>
#include <QCheckBox>
#include <QGridLayout>
#include <QGroupBox>
#include <QHeaderView>
#include <QStyleHints>
#include <QTableWidget>
#include <QWidget>

class CheckBoxTest : public QWidget
{
public:
    CheckBoxTest(QWidget* parent = nullptr)
        : QWidget(parent)
    {
        auto* mainLayout = new QGridLayout(this);
        mainLayout->setSizeConstraint(QLayout::SetFixedSize);

        auto* checkBox1 = new QCheckBox("CheckBox", this);
        checkBox1->setChecked(false);
        mainLayout->addWidget(checkBox1, 0, 0);
        auto* checkBox2 = new QCheckBox("CheckBox", this);
        checkBox2->setChecked(true);
        mainLayout->addWidget(checkBox2, 0, 1);

        auto* groupBox1 = new QGroupBox("GroupBox", this);
        groupBox1->setCheckable(true);
        groupBox1->setChecked(false);
        mainLayout->addWidget(groupBox1, 1, 0);
        auto* groupBox2 = new QGroupBox("GroupBox", this);
        groupBox2->setCheckable(true);
        groupBox2->setChecked(true);
        mainLayout->addWidget(groupBox2, 1, 1);

        auto* table = new QTableWidget(1, 2, this);
        table->setHorizontalHeaderLabels({ "Col1", "Col2" });
        table->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
        table->verticalHeader()->setVisible(false);
        auto* item1 = new QTableWidgetItem("Item");
        item1->setCheckState(Qt::Unchecked);
        table->setItem(0, 0, item1);
        auto* item2 = new QTableWidgetItem("Item");
        item2->setCheckState(Qt::Checked);
        table->setItem(0, 1, item2);
        mainLayout->addWidget(table, 2, 0, 1, 2);
    }
};

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    app.setStyle("Fusion");
    app.styleHints()->setColorScheme(Qt::ColorScheme::Dark);

    CheckBoxTest wdgt;
    wdgt.show();
    return app.exec();
}