netspeed-plugin/mainwidget.cpp at main · kali-urs/netspeed-plugin · GitHub

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#include "mainwidget.h"
#include <QPalette>
#include <QRegularExpression>

MainWidget::MainWidget(Dock::Position position)
    : m_upArrow(nullptr)
    , m_upNum(nullptr)
    , m_upUnit(nullptr)
    , m_downArrow(nullptr)
    , m_downNum(nullptr)
    , m_downUnit(nullptr)
    , m_layout(nullptr)
    , m_arrowWidth(0)
    , m_numWidth(0)
    , m_scale(100)
    , m_position(position)
{
    m_dpi = QApplication::primaryScreen()->logicalDotsPerInch();
    m_font.setFamily("Noto Mono");

    applyScale();
    recalcFixedWidths();

    m_upArrow = new QLabel(this);
    m_upNum = new QLabel(this);
    m_upUnit = new QLabel(this);
    m_downArrow = new QLabel(this);
    m_downNum = new QLabel(this);
    m_downUnit = new QLabel(this);

    m_upArrow->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    m_upNum->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    m_upUnit->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    m_downArrow->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    m_downNum->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    m_downUnit->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);

    m_upArrow->setFont(m_font);
    m_upNum->setFont(m_font);
    m_upUnit->setFont(m_font);
    m_downArrow->setFont(m_font);
    m_downNum->setFont(m_font);
    m_downUnit->setFont(m_font);

    m_upArrow->setFixedWidth(m_arrowWidth);
    m_downArrow->setFixedWidth(m_arrowWidth);
    m_upNum->setFixedWidth(m_numWidth);
    m_downNum->setFixedWidth(m_numWidth);

    m_layout = new QGridLayout;
    m_layout->addWidget(m_upArrow, 0, 0);
    m_layout->addWidget(m_upNum, 0, 1);
    m_layout->addWidget(m_upUnit, 0, 2);
    m_layout->addWidget(m_downArrow, 1, 0);
    m_layout->addWidget(m_downNum, 1, 1);
    m_layout->addWidget(m_downUnit, 1, 2);
    m_layout->setContentsMargins(4, 0, 4, 0);
    m_layout->setSpacing(0);
    m_layout->setHorizontalSpacing(0);
    setLayout(m_layout);

    setAutoFillBackground(true);
    QPalette pal = palette();
    pal.setColor(QPalette::Window, Qt::transparent);
    setPalette(pal);

    updateSpeed({0, 0, "0 B/s", "0 B/s"}, position);
}

MainWidget::~MainWidget() = default;

void MainWidget::applyScale()
{
    int pixelSize = qMax(6, (m_dpi * 9 * m_scale) / (72 * 100));
    m_font.setPixelSize(pixelSize);
}

void MainWidget::recalcFixedWidths()
{
    QFontMetrics fm(m_font);
    m_arrowWidth = fm.horizontalAdvance("↑") + 2;
    m_numWidth = fm.horizontalAdvance("999.9") + 2;

    if (m_upArrow) {
        m_upArrow->setFixedWidth(m_arrowWidth);
        m_downArrow->setFixedWidth(m_arrowWidth);
        m_upNum->setFixedWidth(m_numWidth);
        m_downNum->setFixedWidth(m_numWidth);
        m_upArrow->setFont(m_font);
        m_upNum->setFont(m_font);
        m_upUnit->setFont(m_font);
        m_downArrow->setFont(m_font);
        m_downNum->setFont(m_font);
        m_downUnit->setFont(m_font);
    }
}

void MainWidget::setScale(int scale)
{
    m_scale = qBound(50, scale, 200);
    applyScale();
    recalcFixedWidths();
    updateGeometry();
}

void MainWidget::parseSpeed(const QString &speed, QString &num, QString &unit) const
{
    QRegularExpression re("^([\\d.]+)\\s*(.*)$");
    auto match = re.match(speed);
    if (match.hasMatch()) {
        num = match.captured(1);
        unit = match.captured(2);
    } else {
        num = speed;
        unit.clear();
    }
}

void MainWidget::updateSpeed(const NetSpeedInfo &info, Dock::Position position)
{
    m_position = position;

    QColor textColor = palette().color(QPalette::WindowText);
    QString colorName = textColor.name();
    QString style = QString("QLabel { color: %1; }").arg(colorName);
    m_upArrow->setStyleSheet(style);
    m_upNum->setStyleSheet(style);
    m_upUnit->setStyleSheet(style);
    m_downArrow->setStyleSheet(style);
    m_downNum->setStyleSheet(style);
    m_downUnit->setStyleSheet(style);

    QString upNum, upUnit, downNum, downUnit;
    parseSpeed(info.upSpeed, upNum, upUnit);
    parseSpeed(info.downSpeed, downNum, downUnit);

    m_upArrow->setText("↑");
    m_upNum->setText(upNum);
    m_upUnit->setText(QString("%1/s").arg(upUnit));
    m_downArrow->setText("↓");
    m_downNum->setText(downNum);
    m_downUnit->setText(QString("%1/s").arg(downUnit));

    setMinimumSize(0, 0);
    setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
    updateGeometry();
}

QSize MainWidget::sizeHint() const
{
    if (!m_upNum || !m_upUnit) {
        return QSize(90, 24);
    }

    QFontMetrics fm(m_font);
    int lineH = fm.height();
    int unitW = fm.horizontalAdvance("MB/s");

    return QSize(m_arrowWidth + m_numWidth + unitW + 8, lineH * 2 + 4);
}