#ifndef QUIET_H
#define QUIET_H

#include <QtGui>

class quiet : public QWidget {
    Q_OBJECT

public:
    quiet(QWidget *parent = 0);
    ~quiet();
    void paintEvent(QPaintEvent *event);
private:
    QImage image;
    QPixmap pixmap;
    QGraphicsBlurEffect effect;
    QGraphicsPixmapItem pixmapItem;
    QTimer *timer;
private slots:
    void reDraw();
};

#endif // QUIET_H

#include "quiet.h"

quiet::quiet(QWidget *parent) : QWidget(parent) {
    setWindowTitle("Quiet");
    resize(640, 480);
    setMaximumSize(640, 480);
    setMinimumSize(640, 480);
    image.load(":/images/pic.png", "png");
    timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(reDraw()));
    timer->start(100);
    repaint();
}

quiet::~quiet() {
}

void quiet::paintEvent(QPaintEvent *event) {
    QPainter painter(this);
    QPoint point;
    point.setX(0);
    point.setY(0);
    //painter.drawImage(point, image);
    painter.drawPixmap(point, pixmap);
}

void quiet::reDraw() {
    pixmap.fromImage(image, Qt::AutoColor);
    pixmapItem.setPixmap(pixmap);
    effect.setBlurRadius(0.1); // случайные значения сюда
    pixmapItem.setGraphicsEffect(&effect);
    repaint();
}