QDialog whit FramelessWindowHint shakes when moving

[stima_ua]

@

SMessageBox::SMessageBox(QWidget *parent) : QDialog(parent, Qt::FramelessWindowHint), moving(false), offset(0, 0)
{
setupUi(this);
setAttribute(Qt::WA_TranslucentBackground, true);

setMouseTracking(false);

}

void SMessageBox::mouseMoveEvent(QMouseEvent *event)
{
QDialog::mouseMoveEvent(event);
if (moving)
{
move(event->globalPos() - offset);
//update(); //I tring this but its not help,
//and i trying
//setUpdatesEnebled(false);
//move(event->globalPos() - offset);
//setUpdatesEnebled(true);
}
}

void SMessageBox::mousePressEvent(QMouseEvent *event)
{
QDialog::mousePressEvent(event);
if ( event->button() == Qt::LeftButton )
{
offset = event->pos();
moving = true;
}
}

void SMessageBox::mouseReleaseEvent(QMouseEvent *event)
{
if(event->button() == Qt::LeftButton) moving = false;
}
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