src/qt/splashscreen.cpp

   1 // Copyright (c) 2011-2016 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #if defined(HAVE_CONFIG_H)
   6 #include "config/bitcoin-config.h"
   7 #endif
   8
   9 #include "splashscreen.h"
  10
  11 #include "networkstyle.h"
  12
  13 #include "clientversion.h"
  14 #include "init.h"
  15 #include "util.h"
  16 #include "ui_interface.h"
  17 #include "version.h"
  18
  19 #ifdef ENABLE_WALLET
  20 #include "wallet/wallet.h"
  21 #endif
  22
  23 #include <QApplication>
  24 #include <QCloseEvent>
  25 #include <QDesktopWidget>
  26 #include <QPainter>
  27 #include <QRadialGradient>
  28
  29 SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle) :
  30     QWidget(0, f), curAlignment(0)
  31 {
  32     // set reference point, paddings
  33     int paddingRight            = 50;
  34     int paddingTop              = 50;
  35     int titleVersionVSpace      = 17;
  36     int titleCopyrightVSpace    = 40;
  37
  38     float fontFactor            = 1.0;
  39     float devicePixelRatio      = 1.0;
  40 #if QT_VERSION > 0x050100
  41     devicePixelRatio = ((QGuiApplication*)QCoreApplication::instance())->devicePixelRatio();
  42 #endif
  43
  44     // define text to place
  45     QString titleText       = tr(PACKAGE_NAME);
  46     QString versionText     = QString("Version %1").arg(QString::fromStdString(FormatFullVersion()));
  47     QString copyrightText   = QString::fromUtf8(CopyrightHolders(strprintf("\xc2\xA9 %u-%u ", 2009, COPYRIGHT_YEAR)).c_str());
  48     QString titleAddText    = networkStyle->getTitleAddText();
  49
  50     QString font            = QApplication::font().toString();
  51
  52     // create a bitmap according to device pixelratio
  53     QSize splashSize(480*devicePixelRatio,320*devicePixelRatio);
  54     pixmap = QPixmap(splashSize);
  55
  56 #if QT_VERSION > 0x050100
  57     // change to HiDPI if it makes sense
  58     pixmap.setDevicePixelRatio(devicePixelRatio);
  59 #endif
  60
  61     QPainter pixPaint(&pixmap);
  62     pixPaint.setPen(QColor(100,100,100));
  63
  64     // draw a slightly radial gradient
  65     QRadialGradient gradient(QPoint(0,0), splashSize.width()/devicePixelRatio);
  66     gradient.setColorAt(0, Qt::white);
  67     gradient.setColorAt(1, QColor(247,247,247));
  68     QRect rGradient(QPoint(0,0), splashSize);
  69     pixPaint.fillRect(rGradient, gradient);
  70
  71     // draw the bitcoin icon, expected size of PNG: 1024x1024
  72     QRect rectIcon(QPoint(-150,-122), QSize(430,430));
  73
  74     const QSize requiredSize(1024,1024);
  75     QPixmap icon(networkStyle->getAppIcon().pixmap(requiredSize));
  76
  77     pixPaint.drawPixmap(rectIcon, icon);
  78
  79     // check font size and drawing with
  80     pixPaint.setFont(QFont(font, 33*fontFactor));
  81     QFontMetrics fm = pixPaint.fontMetrics();
  82     int titleTextWidth = fm.width(titleText);
  83     if (titleTextWidth > 176) {
  84         fontFactor = fontFactor * 176 / titleTextWidth;
  85     }
  86
  87     pixPaint.setFont(QFont(font, 33*fontFactor));
  88     fm = pixPaint.fontMetrics();
  89     titleTextWidth  = fm.width(titleText);
  90     pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight,paddingTop,titleText);
  91
  92     pixPaint.setFont(QFont(font, 15*fontFactor));
  93
  94     // if the version string is to long, reduce size
  95     fm = pixPaint.fontMetrics();
  96     int versionTextWidth  = fm.width(versionText);
  97     if(versionTextWidth > titleTextWidth+paddingRight-10) {
  98         pixPaint.setFont(QFont(font, 10*fontFactor));
  99         titleVersionVSpace -= 5;
 100     }
 101     pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight+2,paddingTop+titleVersionVSpace,versionText);
 102
 103     // draw copyright stuff
 104     {
 105         pixPaint.setFont(QFont(font, 10*fontFactor));
 106         const int x = pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight;
 107         const int y = paddingTop+titleCopyrightVSpace;
 108         QRect copyrightRect(x, y, pixmap.width() - x - paddingRight, pixmap.height() - y);
 109         pixPaint.drawText(copyrightRect, Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap, copyrightText);
 110     }
 111
 112     // draw additional text if special network
 113     if(!titleAddText.isEmpty()) {
 114         QFont boldFont = QFont(font, 10*fontFactor);
 115         boldFont.setWeight(QFont::Bold);
 116         pixPaint.setFont(boldFont);
 117         fm = pixPaint.fontMetrics();
 118         int titleAddTextWidth  = fm.width(titleAddText);
 119         pixPaint.drawText(pixmap.width()/devicePixelRatio-titleAddTextWidth-10,15,titleAddText);
 120     }
 121
 122     pixPaint.end();
 123
 124     // Set window title
 125     setWindowTitle(titleText + " " + titleAddText);
 126
 127     // Resize window and move to center of desktop, disallow resizing
 128     QRect r(QPoint(), QSize(pixmap.size().width()/devicePixelRatio,pixmap.size().height()/devicePixelRatio));
 129     resize(r.size());
 130     setFixedSize(r.size());
 131     move(QApplication::desktop()->screenGeometry().center() - r.center());
 132
 133     subscribeToCoreSignals();
 134 }
 135
 136 SplashScreen::~SplashScreen()
 137 {
 138     unsubscribeFromCoreSignals();
 139 }
 140
 141 void SplashScreen::slotFinish(QWidget *mainWin)
 142 {
 143     Q_UNUSED(mainWin);
 144
 145     /* If the window is minimized, hide() will be ignored. */
 146     /* Make sure we de-minimize the splashscreen window before hiding */
 147     if (isMinimized())
 148         showNormal();
 149     hide();
 150     deleteLater(); // No more need for this
 151 }
 152
 153 static void InitMessage(SplashScreen *splash, const std::string &message)
 154 {
 155     QMetaObject::invokeMethod(splash, "showMessage",
 156         Qt::QueuedConnection,
 157         Q_ARG(QString, QString::fromStdString(message)),
 158         Q_ARG(int, Qt::AlignBottom|Qt::AlignHCenter),
 159         Q_ARG(QColor, QColor(55,55,55)));
 160 }
 161
 162 static void ShowProgress(SplashScreen *splash, const std::string &title, int nProgress)
 163 {
 164     InitMessage(splash, title + strprintf("%d", nProgress) + "%");
 165 }
 166
 167 #ifdef ENABLE_WALLET
 168 void SplashScreen::ConnectWallet(CWallet* wallet)
 169 {
 170     wallet->ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
 171     connectedWallets.push_back(wallet);
 172 }
 173 #endif
 174
 175 void SplashScreen::subscribeToCoreSignals()
 176 {
 177     // Connect signals to client
 178     uiInterface.InitMessage.connect(boost::bind(InitMessage, this, _1));
 179     uiInterface.ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
 180 #ifdef ENABLE_WALLET
 181     uiInterface.LoadWallet.connect(boost::bind(&SplashScreen::ConnectWallet, this, _1));
 182 #endif
 183 }
 184
 185 void SplashScreen::unsubscribeFromCoreSignals()
 186 {
 187     // Disconnect signals from client
 188     uiInterface.InitMessage.disconnect(boost::bind(InitMessage, this, _1));
 189     uiInterface.ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
 190 #ifdef ENABLE_WALLET
 191     Q_FOREACH(CWallet* const & pwallet, connectedWallets) {
 192         pwallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
 193     }
 194 #endif
 195 }
 196
 197 void SplashScreen::showMessage(const QString &message, int alignment, const QColor &color)
 198 {
 199     curMessage = message;
 200     curAlignment = alignment;
 201     curColor = color;
 202     update();
 203 }
 204
 205 void SplashScreen::paintEvent(QPaintEvent *event)
 206 {
 207     QPainter painter(this);
 208     painter.drawPixmap(0, 0, pixmap);
 209     QRect r = rect().adjusted(5, 5, -5, -5);
 210     painter.setPen(curColor);
 211     painter.drawText(r, curAlignment, curMessage);
 212 }
 213
 214 void SplashScreen::closeEvent(QCloseEvent *event)
 215 {
 216     StartShutdown(); // allows an "emergency" shutdown during startup
 217     event->ignore();
 218 }