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// Copyright (c) 2011-2022 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 <bitcoin-build-config.h> // IWYU pragma: keep
#include <qt/splashscreen.h>
#include <clientversion.h>
#include <common/system.h>
#include <interfaces/handler.h>
#include <interfaces/node.h>
#include <interfaces/wallet.h>
#include <qt/guiutil.h>
#include <qt/networkstyle.h>
#include <qt/walletmodel.h>
#include <util/translation.h>
#include <functional>
#include <QApplication>
#include <QCloseEvent>
#include <QPainter>
#include <QRadialGradient>
#include <QScreen>
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 = PACKAGE_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);
pixPaint.setFont(QFont(font, 15*fontFactor));
// if the version string is too long, reduce size
fm = pixPaint.fontMetrics();
int versionTextWidth = GUIUtil::TextWidth(fm, versionText);
if(versionTextWidth > titleTextWidth+paddingRight-10) {
pixPaint.setFont(QFont(font, 10*fontFactor));
titleVersionVSpace -= 5;
}
pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight+2,paddingTop+titleVersionVSpace,versionText);
// draw copyright stuff
{
pixPaint.setFont(QFont(font, 10*fontFactor));
const int x = pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight;
const int y = paddingTop+titleCopyrightVSpace;
QRect copyrightRect(x, y, pixmap.width() - x - paddingRight, pixmap.height() - y);
pixPaint.drawText(copyrightRect, Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap, copyrightText);
}
// draw additional text if special network
if(!titleAddText.isEmpty()) {
QFont boldFont = QFont(font, 10*fontFactor);
boldFont.setWeight(QFont::Bold);
pixPaint.setFont(boldFont);
fm = pixPaint.fontMetrics();
int titleAddTextWidth = GUIUtil::TextWidth(fm, titleAddText);
pixPaint.drawText(pixmap.width()/devicePixelRatio-titleAddTextWidth-10,15,titleAddText);
}
pixPaint.end();
// Set window title
setWindowTitle(titleText + " " + titleAddText);
// Resize window and move to center of desktop, disallow resizing
QRect r(QPoint(), QSize(pixmap.size().width()/devicePixelRatio,pixmap.size().height()/devicePixelRatio));
resize(r.size());
setFixedSize(r.size());
move(QGuiApplication::primaryScreen()->geometry().center() - r.center());
installEventFilter(this);
GUIUtil::handleCloseWindowShortcut(this);
}
SplashScreen::~SplashScreen()
{
if (m_node) unsubscribeFromCoreSignals();
}
void SplashScreen::setNode(interfaces::Node& node)
{
assert(!m_node);
m_node = &node;
subscribeToCoreSignals();
if (m_shutdown) m_node->startShutdown();
}
void SplashScreen::shutdown()
{
m_shutdown = true;
if (m_node) m_node->startShutdown();
}
bool SplashScreen::eventFilter(QObject * obj, QEvent * ev) {
if (ev->type() == QEvent::KeyPress) {
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(ev);
if (keyEvent->key() == Qt::Key_Q) {
shutdown();
}
}
return QObject::eventFilter(obj, ev);
}
static void InitMessage(SplashScreen *splash, const std::string &message)
{
bool invoked = QMetaObject::invokeMethod(splash, "showMessage",
Qt::QueuedConnection,
Q_ARG(QString, QString::fromStdString(message)),
Q_ARG(int, Qt::AlignBottom|Qt::AlignHCenter),
Q_ARG(QColor, QColor(55,55,55)));
assert(invoked);
}
static void ShowProgress(SplashScreen *splash, const std::string &title, int nProgress, bool resume_possible)
{
InitMessage(splash, title + std::string("\n") +
(resume_possible ? SplashScreen::tr("(press q to shutdown and continue later)").toStdString()
: SplashScreen::tr("press q to shutdown").toStdString()) +
strprintf("\n%d", nProgress) + "%");
}
void SplashScreen::subscribeToCoreSignals()
{
// Connect signals to client
m_handler_init_message = m_node->handleInitMessage(std::bind(InitMessage, this, std::placeholders::_1));
m_handler_show_progress = m_node->handleShowProgress(std::bind(ShowProgress, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
m_handler_init_wallet = m_node->handleInitWallet([this]() { handleLoadWallet(); });
}
void SplashScreen::handleLoadWallet()
{
#ifdef ENABLE_WALLET
if (!WalletModel::isWalletEnabled()) return;
m_handler_load_wallet = m_node->walletLoader().handleLoadWallet([this](std::unique_ptr<interfaces::Wallet> wallet) {
m_connected_wallet_handlers.emplace_back(wallet->handleShowProgress(std::bind(ShowProgress, this, std::placeholders::_1, std::placeholders::_2, false)));
m_connected_wallets.emplace_back(std::move(wallet));
});
#endif
}
void SplashScreen::unsubscribeFromCoreSignals()
{
// Disconnect signals from client
m_handler_init_message->disconnect();
m_handler_show_progress->disconnect();
for (const auto& handler : m_connected_wallet_handlers) {
handler->disconnect();
}
m_connected_wallet_handlers.clear();
m_connected_wallets.clear();
}
void SplashScreen::showMessage(const QString &message, int alignment, const QColor &color)
{
curMessage = message;
curAlignment = alignment;
curColor = color;
update();
}
void SplashScreen::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
painter.drawPixmap(0, 0, pixmap);
QRect r = rect().adjusted(5, 5, -5, -5);
painter.setPen(curColor);
painter.drawText(r, curAlignment, curMessage);
}
void SplashScreen::closeEvent(QCloseEvent *event)
{
shutdown(); // allows an "emergency" shutdown during startup
event->ignore();
}
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