void QVUMeter::paintValue()
{
QPainter painter(this);
painter.setWindow(0, 0, 100, 540);
painter.setRenderHint(QPainter::Antialiasing);
painter.setBrush(Qt::black);
painter.drawRect(20, 15, 25, 25);
painter.drawRect(55, 15, 25, 25);
painter.setPen(Qt::gray);
painter.drawLine(20, 40, 45, 40);
painter.drawLine(45, 15, 45, 40);
painter.drawLine(55, 40, 80, 40);
painter.drawLine(80, 15, 80, 40);
painter.setPen(QPen(colValue, 1));
QFont valFont("Arial", dimVal, QFont::Bold);
painter.setFont(valFont);
QRectF leftR(20, 15, 25, 25);
QString lVal = QString("%1").arg(leftVal, 0,'f', 0);
painter.drawText(leftR, Qt::AlignCenter, lVal);
QRectF rightR(55, 15, 25, 25);
QString rVal = QString("%1").arg(rightVal, 0,'f', 0);
painter.drawText(rightR, Qt::AlignCenter, rVal);
emit valueLChanged(leftVal);
emit valueRChanged(rightVal);
}
void VUMeter::drawValue(QPainter *painter)
{
painter->save();
//绘制左右音量值背景
painter->setBrush(Qt::black);
painter->drawRect(20, 15, 25, 25);
painter->drawRect(55, 15, 25, 25);
//绘制左右音量值背景右侧突出线条,形成立体感
painter->setPen(Qt::gray);
painter->drawLine(20, 40, 45, 40);
painter->drawLine(45, 15, 45, 40);
painter->drawLine(55, 40, 80, 40);
painter->drawLine(80, 15, 80, 40);
//设置音量值字体
painter->setPen(QPen(colorValue, 1));
QFont valFont("Arial", 12, QFont::Bold);
painter->setFont(valFont);
//绘制左音量值
QRectF leftR(20, 15, 25, 25);
QString lVal = QString("%1").arg(leftValue, 0, 'f', 0);
painter->drawText(leftR, Qt::AlignCenter, lVal);
//绘制右音量值
QRectF rightR(55, 15, 25, 25);
QString rVal = QString("%1").arg(rightValue, 0, 'f', 0);
painter->drawText(rightR, Qt::AlignCenter, rVal);
painter->restore();
//发送音量值改变信号
emit valueLChanged(leftValue);
emit valueRChanged(rightValue);
}
