main.cpp

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// ======================================================================
//  main.cpp
// ======================================================================
//                   This file is a part of the book 
//             "Qt 5.10 Professional programming with C++"
//                       http://qt-book.com
// ======================================================================
//  Copyright (c) 2017 by Max Schlee
// ======================================================================

#include <QtWidgets>

// ----------------------------------------------------------------------
int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    QTreeWidget  twg;
    QStringList  lst;

    lst << "Folders" << "Used Space";
    twg.setHeaderLabels(lst);
    twg.setSortingEnabled(true);

    QTreeWidgetItem* ptwgItem = new QTreeWidgetItem(&twg);
    ptwgItem->setText(0, "Local Disk(C)");
    ptwgItem->setIcon(0, QPixmap(":/drive.bmp"));

    QTreeWidgetItem* ptwgItemDir = 0;
    for (int i = 1; i < 20; ++i) {
        ptwgItemDir = new QTreeWidgetItem(ptwgItem);
        ptwgItemDir->setText(0, "Directory" + QString::number(i));
        ptwgItemDir->setText(1, QString::number(i) + "MB");
        ptwgItemDir->setIcon(0, QPixmap(":/folder.bmp"));
    }
    ptwgItem->setExpanded(true);
    twg.resize(350, 310);
    twg.show();

    return app.exec();
}