text: // Copyright (c) 2011-2014 The Bitcoin 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 paddingRight            = 50;
      int paddingTop              = 50;
      int titleVersionVSpace      = 17;
      int titleCopyrightVSpace    = 40;
  
      float fontFactor            = 1.0;
  
      // define text to place
      QString titleText       = tr("Viacoin Core");
      QString versionText     = QString("Version %1").arg(QString::fromStdString(FormatFullVersion()));
      QString copyrightText   = QChar(0xA9)+QString(" 2009-%1 ").arg(COPYRIGHT_YEAR) + QString(tr("The Bitcoin Core developers")) + QChar(0xA9)+QString(" 2014-%1 ").arg(COPYRIGHT_YEAR) + QString(tr("The Viacoin 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(100,100,100));
  
      // check font size and drawing with
      pixPaint.setFont(QFont(font, 33*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, 33*fontFactor));
      fm = pixPaint.fontMetrics();
      titleTextWidth  = fm.width(titleText);
      pixPaint.drawText(pixmap.width()-titleTextWidth-paddingRight,paddingTop,titleText);
  
      pixPaint.setFont(QFont(font, 15*fontFactor));
  
      // if the version string is to long, reduce size
      fm = pixPaint.fontMetrics();
      int versionTextWidth  = fm.width(versionText);
      if(versionTextWidth > titleTextWidth+paddingRight-10) {
          pixPaint.setFont(QFont(font, 10*fontFactor));
          titleVersionVSpace -= 5;
      }
      pixPaint.drawText(pixmap.width()-titleTextWidth-paddingRight+2,paddingTop+titleVersionVSpace,versionText);
  
      // draw copyright stuff
      pixPaint.setFont(QFont(font, 10*fontFactor));
      pixPaint.drawText(pixmap.width()-titleTextWidth-paddingRight,paddingTop+titleCopyrightVSpace,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  = fm.width(titleAddText);
          pixPaint.drawText(pixmap.width()-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(), 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(55,55,55)));
  }
  
  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();
  }
  