audiomonitor.h

#ifndef AUDIOMONITOR_H
#define AUDIOMONITOR_H

#include <QWidget>
#include <QTimer>

class AudioMonitor : public QWidget
{
    Q_OBJECT
public:
    explicit AudioMonitor(QWidget *parent = 0);
    void set_value(const QVector<double>& values);

protected:
    void paintEvent(QPaintEvent *);
    void resizeEvent(QResizeEvent *);

signals:

public slots:

private:
    QLinearGradient gradient;
    QVector<double> values;
    QTimer clear_timer;

private slots:
    void clear();
};

#endif // AUDIOMONITOR_H