MainWidget.cpp

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#include "config.h"
#include "MainWidget.h"

#include "QrCode.hpp"

#include <QFile>
#include <QExposeEvent>
#include <QResizeEvent>
#include <QOpenGLWidget>
#include <QPainter>
#include <QXmlStreamReader>
#include <QSvgRenderer>
#include <QHostAddress>
#include <QNetworkInterface>

MainWidget::MainWidget()
	:QOpenGLWidget()
{
}

void MainWidget::paintGL()
{
    // Get logo
    QFile logoFile(":/umbrel.svg");
    QFile QRLogoFile(":/umbrel-qr-icon.svg");
    logoFile.open(QIODevice::ReadOnly);
    QRLogoFile.open(QIODevice::ReadOnly);
    QString logoString = QTextStream(&logoFile).readAll();
    QString qrLogoString = QTextStream(&QRLogoFile).readAll();

    // Get tor host name
    QFile torHostNamelogoFile("/home/umbrel/umbrel/tor/data/web/hostname");
    torHostNamelogoFile.open(QIODevice::ReadOnly);
    QTextStream hostNameTextStream(&torHostNamelogoFile);
    QString torHostName = "http://" + hostNameTextStream.readAll();

    // Get IP
    QString ipAddress;
    const QHostAddress &localhost = QHostAddress(QHostAddress::LocalHost);
    for (const QHostAddress &address: QNetworkInterface::allAddresses()) {
        if (address.protocol() == QAbstractSocket::IPv4Protocol && address != localhost) {
            ipAddress = address.toString();
        }
    }

    // Prepare images
    QImage backgroundColorImage = QImage(this->geometry().size(), QImage::Format_RGB32);
    QImage backgroundImage(500, 500, QImage::Format_ARGB32);
    QImage qrCenterImage(136, 136, QImage::Format_ARGB32);
    QImage logoImage(68, 76.5, QImage::Format_ARGB32);
    backgroundColorImage.fill(QColor(BACKGKROUND_COLOR));
    backgroundImage.fill(Qt::white);
    qrCenterImage.fill(Qt::white);
    logoImage.fill(QColor(BACKGKROUND_COLOR));
    QPainter painter(&backgroundImage);
    QPainter QRLogoPainter(&qrCenterImage);
    QSvgRenderer *renderer = getQrCode(&torHostName);
    renderer->render(&painter);
    int deltaX = this->geometry().width() - backgroundImage.width();
    int deltaY = this->geometry().height() - backgroundImage.height() + 260;
    int deltaX2 = backgroundImage.width() - 136;
    int deltaY2 = backgroundImage.height() - 136;
    QXmlStreamReader *reader = new QXmlStreamReader(qrLogoString);
    QSvgRenderer *renderer1 = new QSvgRenderer(reader);
    renderer1->render(&QRLogoPainter);

    // Draw background with QR code
    QPainter textPainter(this);
    textPainter.drawImage(this->geometry(), backgroundColorImage);
    textPainter.translate(deltaX / 2, deltaY / 2);
    textPainter.drawImage(backgroundImage.rect(), backgroundImage);
    textPainter.translate(deltaX2 / 2, deltaY2 / 2);
    textPainter.drawImage(qrCenterImage.rect(), qrCenterImage);
    textPainter.translate(-(deltaX / 2), -(deltaY / 2));
    textPainter.translate(-(deltaX2 / 2), -(deltaY2 / 2));
    textPainter.setPen(QPen(QColor(TEXT_COLOR)));
    textPainter.setFont(QFont(DEFAULT_FONT, 50, QFont::Bold));
    textPainter.translate(0, 20 + deltaY / 2 - 300);
    textPainter.drawText(this->geometry(), Qt::AlignHCenter, "Welcome!");
    textPainter.translate(0, 90);
    textPainter.setFont(QFont(DEFAULT_FONT, 20, QFont::Bold));
    textPainter.drawText(this->geometry(), Qt::AlignHCenter, "Your Umbrel is up and running at:");
    textPainter.translate(0, 40);
    textPainter.drawText(this->geometry(), Qt::AlignHCenter, "http://umbrel.local");
    textPainter.translate(0, 40);
    textPainter.drawText(this->geometry(), Qt::AlignHCenter, "http://" + ipAddress);
    textPainter.translate(0, 40);
    textPainter.drawText(this->geometry(), Qt::AlignHCenter, torHostName);
    textPainter.translate(0, 600);
    textPainter.drawText(this->geometry(), Qt::AlignHCenter, "Thank you for using Umbrel!");

    // Draw Umbrel logo in the bottom left corner
    QPainter logoPainter(&logoImage);
    QXmlStreamReader *reader1 = new QXmlStreamReader(logoString);
    QSvgRenderer *renderer2 = new QSvgRenderer(reader1);
    renderer2->render(&logoPainter);
    int deltaX3 = this->geometry().width() - logoImage.width() - 15;
    int deltaY3 = this->geometry().height() - logoImage.height() - 15;
    textPainter.translate(deltaX3, -(20 + deltaY / 2 - 300) - 600 - 40 * 3 - 90 + deltaY3);
    textPainter.drawImage(logoImage.rect(), logoImage);
    textPainter.end();
}

QSvgRenderer *MainWidget::getQrCode(QString *address) {
    qrcodegen::QrCode qr0 = qrcodegen::QrCode::encodeText(address->toStdString().c_str(), qrcodegen::QrCode::Ecc::HIGH);
    QString svg = QString::fromStdString(qr0.toSvgString(4));
    QXmlStreamReader *reader = new QXmlStreamReader(svg);
    QSvgRenderer *renderer = new QSvgRenderer(reader);
    return renderer;
}