void GraphicsBoard::paint(QPainter* painter,
const QStyleOptionGraphicsItem* option,
QWidget* widget)
{
Q_UNUSED(option);
Q_UNUSED(widget);
QRectF rect(m_rect.topLeft(), QSizeF(m_squareSize, m_squareSize));
const qreal rLeft = rect.left();
// paint squares
for (int y = 0; y < m_ranks; y++)
{
rect.moveLeft(rLeft);
for (int x = 0; x < m_files; x++)
{
if ((x % 2) == (y % 2))
painter->fillRect(rect, m_lightColor);
else
painter->fillRect(rect, m_darkColor);
rect.moveLeft(rect.left() + m_squareSize);
}
rect.moveTop(rect.top() + m_squareSize);
}
auto font = painter->font();
font.setPointSizeF(font.pointSizeF() * 0.7);
painter->setFont(font);
// paint file coordinates
const QString alphabet = "abcdefghijklmnopqrstuvwxyz";
for (int i = 0; i < m_files; i++)
{
const qreal tops[] = {m_rect.top() - m_coordSize,
m_rect.bottom()};
for (const auto top : tops)
{
rect = QRectF(m_rect.left() + (m_squareSize * i), top,
m_squareSize, m_coordSize);
int file = m_flipped ? m_files - i - 1 : i;
painter->drawText(rect, Qt::AlignCenter, alphabet[file]);
}
}
// paint rank coordinates
for (int i = 0; i < m_ranks; i++)
{
const qreal lefts[] = {m_rect.left() - m_coordSize,
m_rect.right()};
for (const auto left : lefts)
{
rect = QRectF(left, m_rect.top() + (m_squareSize * i),
m_coordSize, m_squareSize);
int rank = m_flipped ? i + 1 : m_ranks - i;
const auto num = QString::number(rank);
painter->drawText(rect, Qt::AlignCenter, num);
}
}
}
AudioEqualizerDialog::AudioEqualizerDialog(QWidget *parent)
: QDialog(parent), d(new Data)
{
d->p = this;
auto vbox = new QVBoxLayout;
auto hbox = new QHBoxLayout;
hbox->addWidget(new QLabel(tr("Preset")));
d->presets = new QComboBox;
d->presets->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
for (int i = 0; i < Eq::MaxPreset; ++i)
d->presets->addItem(AudioEqualizer::name((Preset)i), i);
auto sig = static_cast<Signal<QComboBox, int>>(&QComboBox::currentIndexChanged);
auto load = [=] () {
auto data = d->presets->currentData();
if (data.type() == (int)QMetaType::Int)
setEqualizer(Eq(Preset(data.toInt())));
};
connect(d->presets, sig, this, load);
hbox->addWidget(d->presets);
auto button = new QPushButton(tr("Load"));
connect(button, &QPushButton::clicked, this, load);
hbox->addWidget(button);
vbox->addLayout(hbox);
hbox = new QHBoxLayout;
auto font = this->font();
font.setPointSizeF(font.pointSizeF()*0.8);
const int w = QFontMetrics(font).width(u"+20.0dB"_q) + 2;
for (int i = 0; i < Eq::bands(); ++i) {
auto s = d->sliders[i] = new QSlider;
s->setOrientation(Qt::Vertical);
s->setRange(Eq::min() * Factor, Eq::max() * Factor);
s->setFixedWidth(w);
auto vbox = new QVBoxLayout;
const auto f = Eq::freqeuncy(i);
const QString fq = f < 999.9 ? (QString::number(f) % "Hz"_a)
: (QString::number(f/1000.0) % "kHz"_a);
auto label = new QLabel(fq);
label->setFont(font);
label->setAlignment(Qt::AlignCenter);
vbox->addWidget(label);
vbox->addWidget(s);
auto dB = new QLabel("0.0dB"_a);
dB->setFont(font);
dB->setAlignment(Qt::AlignCenter);
vbox->addWidget(dB);
hbox->addLayout(vbox);
connect(s, &QSlider::valueChanged, this, [=] () {
const auto v = s->value()/(double)Factor;
dB->setText((v > 0 ? "+"_a : ""_a) % QString::number(v, 'f', 1) % "dB"_a);
if (_Change(d->eq[i], v) && d->update)
d->update(d->eq);
});
}
vbox->addLayout(hbox);
setLayout(vbox);
_SetWindowTitle(this, tr("Audio Equalizer"));
}