TDialog.hpp

#ifndef TDIALOG_HPP
#define TDIALOG_HPP

#include <QtWidgets>
class TDialog: public QDialog {
    Q_OBJECT
public:
    explicit TDialog(QWidget *parent=0): QDialog(parent) {
        QVBoxLayout *l = new QVBoxLayout;
        m_bar = new QProgressBar;
        l->addWidget(m_bar);
        setLayout(l);
        progress = 0;
        connect(&m_timer, &QTimer::timeout, this, &TDialog::onTimeout);
        m_timer.setSingleShot(false);
        m_timer.setInterval(300);
    }
    int exec() {
        m_timer.start();
        progress = 0;
        m_bar->setValue(progress);
        return QDialog::exec();
    }

private slots:
    void onTimeout() {
        progress += 10;
        m_bar->setValue(progress);
        if (progress == 100) {
            accept();
            progress = 0;
        }
    }

private:
    QProgressBar                *m_bar;
    QTimer                      m_timer;
    unsigned int                progress;
};


#endif