text: // Copyright (c) 2011-2014 The Bitcoin developers
  // Copyright (c) 2014-2015 The Dash developers
  // Copyright (c) 2015-2017 The PIVX developers
  // Distributed under the MIT/X11 software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "splashscreen.h"
  
  #include "clientversion.h"
  #include "init.h"
  #include "networkstyle.h"
  #include "ui_interface.h"
  #include "util.h"
  #include "version.h"
  
  #ifdef ENABLE_WALLET
  #include "wallet.h"
  #endif
  
  #include <QApplication>
  #include <QCloseEvent>
  #include <QDesktopWidget>
  #include <QPainter>
  
  SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle* networkStyle) : QWidget(0, f), curAlignment(0)
  {
      // set reference point, paddings
      int paddingLeft = 14;
      int paddingTop = 450;
      int titleVersionVSpace = 17;
      int titleCopyrightVSpace = 32;
  
      float fontFactor = 1.0;
  
      // define text to place
      QString titleText = tr("Caluracoin Core");
      QString versionText = QString(tr("Version %1")).arg(QString::fromStdString(FormatFullVersion()));
      QString copyrightTextBtc = QChar(0xA9) + QString(" 2009-%1 ").arg(COPYRIGHT_YEAR) + QString(tr("The Bitcoin Core developers"));
      QString copyrightTextDash = QChar(0xA9) + QString(" 2014-%1 ").arg(COPYRIGHT_YEAR) + QString(tr("The Dash Core developers"));
      QString copyrightTextPIVX = QChar(0xA9) + QString(" 2015-%1 ").arg(COPYRIGHT_YEAR) + QString(tr("The PIVX Core developers"));
      QString copyrightTextCLRC = QChar(0xA9) + QString(" 2017-%1 ").arg(COPYRIGHT_YEAR) + QString(tr("CaluracoinCoin Core developers"));
      QString titleAddText = networkStyle->getTitleAddText();
  
      QString font = QApplication::font().toString();
  
      // load the bitmap for writing some text over it
      pixmap = networkStyle->getSplashImage();
  
      QPainter pixPaint(&pixmap);
      pixPaint.setPen(QColor(255, 255, 255));
  
      // check font size and drawing with
      pixPaint.setFont(QFont(font, 28 * fontFactor));
      QFontMetrics fm = pixPaint.fontMetrics();
      int titleTextWidth = fm.width(titleText);
      if (titleTextWidth > 160) {
          // strange font rendering, Arial probably not found
          fontFactor = 0.75;
      }
  
      pixPaint.setFont(QFont(font, 28 * fontFactor));
      fm = pixPaint.fontMetrics();
      //titleTextWidth = fm.width(titleText);
      pixPaint.drawText(paddingLeft, paddingTop, titleText);
  
      pixPaint.setFont(QFont(font, 15 * fontFactor));
      pixPaint.drawText(paddingLeft, paddingTop + titleVersionVSpace, versionText);
  
      // draw copyright stuff
      pixPaint.setFont(QFont(font, 10 * fontFactor));
      pixPaint.drawText(paddingLeft, paddingTop + titleCopyrightVSpace, copyrightTextBtc);
      pixPaint.drawText(paddingLeft, paddingTop + titleCopyrightVSpace + 12, copyrightTextDash);
      pixPaint.drawText(paddingLeft, paddingTop + titleCopyrightVSpace + 24, copyrightTextPIVX);
      pixPaint.drawText(paddingLeft, paddingTop + titleCopyrightVSpace + 36, copyrightTextCLRC);
  
      // 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 = fm.width(titleAddText);
          pixPaint.drawText(pixmap.width() - titleAddTextWidth - 10, pixmap.height() - 25, titleAddText);
      }
  
      pixPaint.end();
  
      // Set window title
      setWindowTitle(titleText + " " + titleAddText);
  
      // Resize window and move to center of desktop, disallow resizing
      QRect r(QPoint(), pixmap.size());
      resize(r.size());
      setFixedSize(r.size());
      move(QApplication::desktop()->screenGeometry().center() - r.center());
  
      subscribeToCoreSignals();
  }
  
  SplashScreen::~SplashScreen()
  {
      unsubscribeFromCoreSignals();
  }
  
  void SplashScreen::slotFinish(QWidget* mainWin)
  {
      Q_UNUSED(mainWin);
      hide();
  }
  
  static void InitMessage(SplashScreen* splash, const std::string& message)
  {
      QMetaObject::invokeMethod(splash, "showMessage",
          Qt::QueuedConnection,
          Q_ARG(QString, QString::fromStdString(message)),
          Q_ARG(int, Qt::AlignBottom | Qt::AlignHCenter),
          Q_ARG(QColor, QColor(255, 255, 255)));
  }
  
  static void ShowProgress(SplashScreen* splash, const std::string& title, int nProgress)
  {
      InitMessage(splash, title + strprintf("%d", nProgress) + "%");
  }
  
  #ifdef ENABLE_WALLET
  static void ConnectWallet(SplashScreen* splash, CWallet* wallet)
  {
      wallet->ShowProgress.connect(boost::bind(ShowProgress, splash, _1, _2));
  }
  #endif
  
  void SplashScreen::subscribeToCoreSignals()
  {
      // Connect signals to client
      uiInterface.InitMessage.connect(boost::bind(InitMessage, this, _1));
      uiInterface.ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
  #ifdef ENABLE_WALLET
      uiInterface.LoadWallet.connect(boost::bind(ConnectWallet, this, _1));
  #endif
  }
  
  void SplashScreen::unsubscribeFromCoreSignals()
  {
      // Disconnect signals from client
      uiInterface.InitMessage.disconnect(boost::bind(InitMessage, this, _1));
      uiInterface.ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
  #ifdef ENABLE_WALLET
      if (pwalletMain)
          pwalletMain->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
  #endif
  }
  
  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)
  {
      StartShutdown(); // allows an "emergency" shutdown during startup
      event->ignore();
  }
  