Method SplashScreen

src/qt/splashscreen.cpp:29–132

SplashScreen::SplashScreen(const NetworkStyle* networkStyle)
    : QWidget()
{
    // set reference point, paddings
    int paddingRight            = 50;
    int paddingTop              = 50;
    int titleVersionVSpace      = 17;
    int titleCopyrightVSpace    = 40;

    float fontFactor            = 1.0;
    float devicePixelRatio      = 1.0;
    devicePixelRatio = static_cast<QGuiApplication*>(QCoreApplication::instance())->devicePixelRatio();

    // define text to place
    QString titleText       = CLIENT_NAME;
    QString versionText     = QString("Version %1").arg(QString::fromStdString(FormatFullVersion()));
    QString copyrightText   = QString::fromUtf8(CopyrightHolders(strprintf("\xc2\xA9 %u-%u ", 2009, COPYRIGHT_YEAR)).c_str());
    const QString& titleAddText    = networkStyle->getTitleAddText();

    QString font            = QApplication::font().toString();

    // create a bitmap according to device pixelratio
    QSize splashSize(480*devicePixelRatio,320*devicePixelRatio);
    pixmap = QPixmap(splashSize);

    // change to HiDPI if it makes sense
    pixmap.setDevicePixelRatio(devicePixelRatio);

    QPainter pixPaint(&pixmap);
    pixPaint.setPen(QColor(100,100,100));

    // draw a slightly radial gradient
    QRadialGradient gradient(QPoint(0,0), splashSize.width()/devicePixelRatio);
    gradient.setColorAt(0, Qt::white);
    gradient.setColorAt(1, QColor(247,247,247));
    QRect rGradient(QPoint(0,0), splashSize);
    pixPaint.fillRect(rGradient, gradient);

    // draw the bitcoin icon, expected size of PNG: 1024x1024
    QRect rectIcon(QPoint(-150,-122), QSize(430,430));

    const QSize requiredSize(1024,1024);
    QPixmap icon(networkStyle->getAppIcon().pixmap(requiredSize));

    pixPaint.drawPixmap(rectIcon, icon);

    // check font size and drawing with
    pixPaint.setFont(QFont(font, 33*fontFactor));
    QFontMetrics fm = pixPaint.fontMetrics();
    int titleTextWidth = GUIUtil::TextWidth(fm, titleText);
    if (titleTextWidth > 176) {
        fontFactor = fontFactor * 176 / titleTextWidth;
    }

    pixPaint.setFont(QFont(font, 33*fontFactor));
    fm = pixPaint.fontMetrics();
    titleTextWidth  = GUIUtil::TextWidth(fm, titleText);
    pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight,paddingTop,titleText);