This class supports QLabel blinking with fading effect

QBlinkLabelControl.cpp

#include "QBlinkLabelControl.h"

QBlinkLabelControl::QBlinkLabelControl(QLabel *label, int _fade_time, int _fade_factor) :
  m_Label(label),
  m_iTime(_fade_time),
  m_iFade(_fade_factor)
{
  this->setMinimumWidth(70);

  m_BackgroundColor = QColor(Qt::black);

  QPalette pal = palette();
  pal.setColor(backgroundRole(), m_BackgroundColor);
  pal.setColor(foregroundRole(), Qt::yellow);
  m_Label->setPalette(pal);
  m_Label->setAutoFillBackground(true);

  timer = new QTimer();
  timer->setInterval(m_iTime);

  connect(timer, SIGNAL(timeout()),
          this,    SLOT(fade_label()));
}

QBlinkLabelControl::~QBlinkLabelControl()
{
}

void QBlinkLabelControl::fade_label()
{
  if ((m_Label->palette().color(backgroundRole()).value()) == 255 ) {
      timer->stop();
      return;
    }
  QColor fcolor = m_Label->palette().color(backgroundRole()).darker(m_iFade);
  QPalette pal = palette();
  pal.setColor(backgroundRole(), fcolor);
  pal.setColor(foregroundRole(), Qt::yellow);
  m_Label->setPalette(pal);
}

void QBlinkLabelControl::onChangeState(QBarGraphWidget::Colors _blinkColor)
{ 
    timer->stop();
    QPalette pal = palette();
    pal.setColor(backgroundRole(), _blinkColor);
    m_Label->setPalette(pal);
    timer->start();
}

QBlinkLabelControl.h

#include <QLabel>
#include <QTimer>

class QBlinkLabelControl: public QObject
{
  Q_OBJECT
  Q_ENUMS(Color)

public:
  QBlinkLabelControl(QLabel *label, int _fade_time=5, int _fade_factor=101);
  ~QBlinkLabelControl();

private:
  QColor m_BackgroundColor;
  int m_iTime;
  int m_iFade;

  QLabel* m_Label;

  QTimer *timer;

public slots:
  void onChangeState(QColor _blinkColor);

private slots:
  void fadeLabel();
};