protected function paintEvent($event)
{
$painter = new QPainter($this);
$painter->setPen(Qt::NoPen);
$painter->setBrush(new QBrush(new QColor(0, 0, 255)));
$painter->translate(0, $this->rect()->height());
$painter->drawPie(new QRect(-35, -35, 70, 70), 0, 90 * 16);
$painter->rotate(-$this->currentAngle);
$painter->drawRect(new QRect(30, -5, 20, 10));
$painter->end();
}
protected function paintEvent($event)
{
$painter = new QPainter($this);
$painter->drawText(200, 200, tr("Angle = ") . QString::number($this->currentAngle));
$painter->end();
}
