customprogressbar.h

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#ifndef CUSTOMPROGRESSBAR_H
#define CUSTOMPROGRESSBAR_H
 
#include <QProgressBar>
#include <QTimer>
 
class CustomProgressBar : public QProgressBar {
    Q_OBJECT
 
public:
    CustomProgressBar(QWidget* parent = nullptr) : QProgressBar(parent) {
        setMinimum(0);
        setMaximum(100);
        setTextVisible(false);
        hide();
        timer_ = new QTimer(this);
        timer_->setSingleShot(true);
        connect(timer_, &QTimer::timeout, this, &CustomProgressBar::hide);
    }
 
    ~CustomProgressBar() {
        delete timer_;
    }
 
    void start() {
        show();
        timer_->stop();
        emit progressStarted();
    }
 
    void stop() {
        timer_->start(5000);
        emit progressStopped();
    }
 
signals:
    void progressStarted();
 
    void progressStopped();
 
private:
    QTimer* timer_; 
};
 
#endif // CUSTOMPROGRESSBAR_H