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     installEventFilter(this);
 135 }
 136
 137 SplashScreen::~SplashScreen()
 138 {
 139     unsubscribeFromCoreSignals();
 140 }
 141
 142 bool SplashScreen::eventFilter(QObject * obj, QEvent * ev) {
 143     if (ev->type() == QEvent::KeyPress) {
 144         QKeyEvent *keyEvent = static_cast<QKeyEvent *>(ev);
 145         if(keyEvent->text()[0] == 'q' && breakAction != nullptr) {
 146             breakAction();
 147         }
 148     }
 149     return QObject::eventFilter(obj, ev);
 150 }
 151
 152 void SplashScreen::slotFinish(QWidget *mainWin)
 153 {
 154     Q_UNUSED(mainWin);
 155
 156     /* If the window is minimized, hide() will be ignored. */
 157     /* Make sure we de-minimize the splashscreen window before hiding */
 158     if (isMinimized())
 159         showNormal();
 160     hide();
 161     deleteLater(); // No more need for this
 162 }
 163
 164 static void InitMessage(SplashScreen *splash, const std::string &message)
 165 {
 166     QMetaObject::invokeMethod(splash, "showMessage",
 167         Qt::QueuedConnection,
 168         Q_ARG(QString, QString::fromStdString(message)),
 169         Q_ARG(int, Qt::AlignBottom|Qt::AlignHCenter),
 170         Q_ARG(QColor, QColor(55,55,55)));
 171 }
 172
 173 static void ShowProgress(SplashScreen *splash, const std::string &title, int nProgress)
 174 {
 175     InitMessage(splash, title + strprintf("%d", nProgress) + "%");
 176 }
 177
 178 void SplashScreen::setBreakAction(const std::function<void(void)> &action)
 179 {
 180     breakAction = action;
 181 }
 182
 183 static void SetProgressBreakAction(SplashScreen *splash, const std::function<void(void)> &action)
 184 {
 185     QMetaObject::invokeMethod(splash, "setBreakAction",
 186         Qt::QueuedConnection,
 187         Q_ARG(std::function<void(void)>, action));
 188 }
 189
 190 #ifdef ENABLE_WALLET
 191 void SplashScreen::ConnectWallet(CWallet* wallet)
 192 {
 193     wallet->ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
 194     connectedWallets.push_back(wallet);
 195 }
 196 #endif
 197
 198 void SplashScreen::subscribeToCoreSignals()
 199 {
 200     // Connect signals to client
 201     uiInterface.InitMessage.connect(boost::bind(InitMessage, this, _1));
 202     uiInterface.ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
 203     uiInterface.SetProgressBreakAction.connect(boost::bind(SetProgressBreakAction, this, _1));
 204 #ifdef ENABLE_WALLET
 205     uiInterface.LoadWallet.connect(boost::bind(&SplashScreen::ConnectWallet, this, _1));
 206 #endif
 207 }
 208
 209 void SplashScreen::unsubscribeFromCoreSignals()
 210 {
 211     // Disconnect signals from client
 212     uiInterface.InitMessage.disconnect(boost::bind(InitMessage, this, _1));
 213     uiInterface.ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
 214 #ifdef ENABLE_WALLET
 215     for (CWallet* const & pwallet : connectedWallets) {
 216         pwallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
 217     }
 218 #endif
 219 }
 220
 221 void SplashScreen::showMessage(const QString &message, int alignment, const QColor &color)
 222 {
 223     curMessage = message;
 224     curAlignment = alignment;
 225     curColor = color;
 226     update();
 227 }
 228
 229 void SplashScreen::paintEvent(QPaintEvent *event)
 230 {
 231     QPainter painter(this);
 232     painter.drawPixmap(0, 0, pixmap);
 233     QRect r = rect().adjusted(5, 5, -5, -5);
 234     painter.setPen(curColor);
 235     painter.drawText(r, curAlignment, curMessage);
 236 }
 237
 238 void SplashScreen::closeEvent(QCloseEvent *event)
 239 {
 240     StartShutdown(); // allows an "emergency" shutdown during startup
 241     event->ignore();
 242 }