networkstyle.cpp

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// Copyright (c) 2014-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include <qt/networkstyle.h>
 
#include <qt/guiconstants.h>
 
#include <tinyformat.h>
#include <util/chaintype.h>
 
#include <QApplication>
 
static const struct {
    const ChainType networkId;
    const char *appName;
    const int iconColorHueShift;
    const int iconColorSaturationReduction;
} network_styles[] = {
    {ChainType::MAIN, QAPP_APP_NAME_DEFAULT, 0, 0},
    {ChainType::TESTNET, QAPP_APP_NAME_TESTNET, 70, 30},
    {ChainType::REGTEST, QAPP_APP_NAME_REGTEST, 160, 30},
};
 
// titleAddText needs to be const char* for tr()
NetworkStyle::NetworkStyle(const QString &_appName, const int iconColorHueShift,
                           const int iconColorSaturationReduction,
                           const char *_titleAddText)
    : appName(_appName),
      titleAddText(qApp->translate("SplashScreen", _titleAddText)) {
    // load pixmap
    QPixmap pixmap(":/icons/bitcoin");
 
    if (iconColorHueShift != 0 && iconColorSaturationReduction != 0) {
        // generate QImage from QPixmap
        QImage img = pixmap.toImage();
 
        int h, s, l, a;
 
        // traverse though lines
        for (int y = 0; y < img.height(); y++) {
            QRgb *scL = reinterpret_cast<QRgb *>(img.scanLine(y));
 
            // loop through pixels
            for (int x = 0; x < img.width(); x++) {
                // preserve alpha because QColor::getHsl doesn't return the
                // alpha value
                a = qAlpha(scL[x]);
                QColor col(scL[x]);
 
                // get hue value
                col.getHsl(&h, &s, &l);
 
                // rotate color on RGB color circle
                // 70° should end up with the typical "testnet" green
                h += iconColorHueShift;
 
                // change saturation value
                if (s > iconColorSaturationReduction) {
                    s -= iconColorSaturationReduction;
                }
                col.setHsl(h, s, l, a);
 
                // set the pixel
                scL[x] = col.rgba();
            }
        }
 
        // convert back to QPixmap
        pixmap.convertFromImage(img);
    }
 
    appIcon = QIcon(pixmap);
    trayAndWindowIcon = QIcon(pixmap.scaled(QSize(256, 256)));
}
 
const NetworkStyle *NetworkStyle::instantiate(const ChainType networkId) {
    std::string titleAddText =
        networkId == ChainType::MAIN
            ? ""
            : strprintf("[%s]", ChainTypeToString(networkId));
    for (const auto &network_style : network_styles) {
        if (networkId == network_style.networkId) {
            return new NetworkStyle(network_style.appName,
                                    network_style.iconColorHueShift,
                                    network_style.iconColorSaturationReduction,
                                    titleAddText.c_str());
        }
    }
    return nullptr;
}