C++ QFontDatabase::isScalable方法代码示例

QWidget* NMGPropertyEditorDelegate::createEditor(QWidget* parent,
                                                 const QStyleOptionViewItem& option,
                                                 const QModelIndex& index) const
{
  Q_UNUSED(option);
  QWidget* editor = 0;
  if(index.column() == 1)
  {
    const QTreeWidgetItem* property = static_cast<QTreeWidgetItem*>(index.internalPointer());
    int valueType = property->data(1, Qt::EditRole).type();
    QString propertyName = property->text(0);
    switch(valueType)
    {
      case QVariant::Bool:
      {
        QComboBox* combo = new QComboBox(parent);
        combo->setFrame(FALSE);
        combo->addItems(QStringList() << QString::fromUtf8("false") << QString::fromUtf8("true"));
        QObject::connect(combo, SIGNAL(currentIndexChanged(int)), this, SLOT(sync()));
        editor = combo;
        break;
      }
      
      case QVariant::String:
      {
        if(propertyName == "fontFamily")
        {
          QFontDatabase fdb;
          QStringList list = fdb.families(QFontDatabase::Latin);
          QStringList result;
          for(int i = 0; i < list.size(); i++) 
          {
            if(fdb.isScalable(list.at(i))) result += list.at(i);
          }
          QComboBox* combo = new QComboBox(parent);
          combo->setFrame(FALSE);
          combo->addItems(result);
          QObject::connect(combo, SIGNAL(currentIndexChanged(int)), this, SLOT(sync()));
          editor = combo;
        }
        else if(propertyName == "representation")
        {
          QComboBox* combo = new QComboBox(parent);
          combo->setFrame(FALSE);
          QStringList list;
          list << LINE_TYPE << AREA_TYPE << POINTS_TYPE << BARS_TYPE;
          combo->addItems(list);
          QObject::connect(combo, SIGNAL(currentIndexChanged(int)), this, SLOT(sync()));
          editor = combo;
        }
        else if(propertyName == "position")

//.........这里部分代码省略.........
        Display *pDisplay = XOpenDisplay(pszDisplay);
        if (!pDisplay)
        {
            RTPrintf(pszDisplay ? "Failed to open the X11 display \"%s\"!\n"
                                : "Failed to open the X11 display!\n",
                     pszDisplay);
            break;
        }
        Visual *pVisual =   useDefaultVisual
                          ? DefaultVisual(pDisplay, DefaultScreen(pDisplay))
                          : NULL;
        /* Now create the application object: */
        QApplication a(pDisplay, argc, argv, (Qt::HANDLE)pVisual);
#else /* Q_WS_X11 */
        QApplication a(argc, argv);
#endif /* Q_WS_X11 */

#ifdef Q_OS_SOLARIS
        /* Use plastique look&feel for Solaris instead of the default motif (Qt 4.7.x): */
        QApplication::setStyle(new QPlastiqueStyle);
#endif /* Q_OS_SOLARIS */

#ifdef Q_WS_X11
        /* This patch is not used for now on Solaris & OpenSolaris because
         * there is no anti-aliasing enabled by default, Qt4 to be rebuilt. */
# ifndef Q_OS_SOLARIS
        /* Cause Qt4 has the conflict with fontconfig application as a result
         * sometimes substituting some fonts with non scaleable-anti-aliased
         * bitmap font we are reseting substitutes for the current application
         * font family if it is non scaleable-anti-aliased. */
        QFontDatabase fontDataBase;

        QString currentFamily(QApplication::font().family());
        bool isCurrentScaleable = fontDataBase.isScalable(currentFamily);

        QString subFamily(QFont::substitute(currentFamily));
        bool isSubScaleable = fontDataBase.isScalable(subFamily);

        if (isCurrentScaleable && !isSubScaleable)
            QFont::removeSubstitution(currentFamily);
# endif /* Q_OS_SOLARIS */
#endif /* Q_WS_X11 */

#ifdef Q_WS_WIN
        /* Drag in the sound drivers and DLLs early to get rid of the delay taking
         * place when the main menu bar (or any action from that menu bar) is
         * activated for the first time. This delay is especially annoying if it
         * happens when the VM is executing in real mode (which gives 100% CPU
         * load and slows down the load process that happens on the main GUI
         * thread to several seconds). */
        PlaySound(NULL, NULL, 0);
#endif /* Q_WS_WIN */

#ifdef Q_WS_MAC
        /* Disable menu icons on MacOS X host: */
        ::darwinDisableIconsInMenus();
#endif /* Q_WS_MAC */

#ifdef Q_WS_X11
        /* Qt version check (major.minor are sensitive, fix number is ignored): */
        if (VBoxGlobal::qtRTVersion() < (VBoxGlobal::qtCTVersion() & 0xFFFF00))
        {
            QString strMsg = QApplication::tr("Executable <b>%1</b> requires Qt %2.x, found Qt %3.")
                                              .arg(qAppName())
                                              .arg(VBoxGlobal::qtCTVersionString().section('.', 0, 1))
                                              .arg(VBoxGlobal::qtRTVersionString());

//.........这里部分代码省略.........
        /* To avoid various Qt crashes
         * when testing widget attributes or acquiring winIds
         * we decided to make our widgets native under x11 hosts.
         * Yes, we aware of note that alien widgets faster to draw
         * but the only widget we need to be fast - viewport of VM
         * was always native since we are using his id for 3d service needs. */
        a.setAttribute(Qt::AA_NativeWindows);
#endif /* Q_WS_X11 */

#ifdef Q_WS_MAC
# ifdef VBOX_GUI_WITH_HIDPI
        /* Enable HiDPI icons. For this we require a patched version of Qt 4.x with
         * the changes from https://codereview.qt-project.org/#change,54636 applied. */
        qApp->setAttribute(Qt::AA_UseHighDpiPixmaps);
# endif /* VBOX_GUI_WITH_HIDPI */
#endif /* Q_WS_MAC */

#ifdef Q_OS_SOLARIS
        /* Use plastique look&feel for Solaris instead of the default motif (Qt 4.7.x): */
        QApplication::setStyle(new QPlastiqueStyle);
#endif /* Q_OS_SOLARIS */

#ifdef Q_WS_X11
        /* This patch is not used for now on Solaris & OpenSolaris because
         * there is no anti-aliasing enabled by default, Qt4 to be rebuilt. */
# ifndef Q_OS_SOLARIS
        /* Cause Qt4 has the conflict with fontconfig application as a result
         * sometimes substituting some fonts with non scaleable-anti-aliased
         * bitmap font we are reseting substitutes for the current application
         * font family if it is non scaleable-anti-aliased. */
        QFontDatabase fontDataBase;

        QString currentFamily(QApplication::font().family());
        bool isCurrentScaleable = fontDataBase.isScalable(currentFamily);

        QString subFamily(QFont::substitute(currentFamily));
        bool isSubScaleable = fontDataBase.isScalable(subFamily);

        if (isCurrentScaleable && !isSubScaleable)
            QFont::removeSubstitution(currentFamily);
# endif /* Q_OS_SOLARIS */
#endif /* Q_WS_X11 */

#ifdef Q_WS_WIN
        /* Drag in the sound drivers and DLLs early to get rid of the delay taking
         * place when the main menu bar (or any action from that menu bar) is
         * activated for the first time. This delay is especially annoying if it
         * happens when the VM is executing in real mode (which gives 100% CPU
         * load and slows down the load process that happens on the main GUI
         * thread to several seconds). */
        PlaySound(NULL, NULL, 0);
#endif /* Q_WS_WIN */

#ifdef Q_WS_MAC
        /* Disable menu icons on MacOS X host: */
        ::darwinDisableIconsInMenus();
#endif /* Q_WS_MAC */

#ifdef Q_WS_X11
        /* Qt version check (major.minor are sensitive, fix number is ignored): */
        if (VBoxGlobal::qtRTVersion() < (VBoxGlobal::qtCTVersion() & 0xFFFF00))
        {
            QString strMsg = QApplication::tr("Executable <b>%1</b> requires Qt %2.x, found Qt %3.")
                                              .arg(qAppName())
                                              .arg(VBoxGlobal::qtCTVersionString().section('.', 0, 1))
                                              .arg(VBoxGlobal::qtRTVersionString());

//.........这里部分代码省略.........

#ifdef VBOX_WS_MAC
# ifdef VBOX_GUI_WITH_HIDPI
        /* Enable HiDPI icons.
         * For this we require a patched version of Qt 4.x with
         * the changes from https://codereview.qt-project.org/#change,54636 applied. */
        a.setAttribute(Qt::AA_UseHighDpiPixmaps);
# endif /* VBOX_GUI_WITH_HIDPI */

        /* Disable menu icons on MacOS X host: */
        ::darwinDisableIconsInMenus();
#endif /* VBOX_WS_MAC */

#ifdef VBOX_WS_X11
        /* Make all widget native.
         * We did it to avoid various Qt crashes while testing widget attributes or acquiring winIds.
         * Yes, we aware of note that alien widgets faster to draw but the only widget we need to be fast
         * is viewport of VM which was always native since we are using his id for 3D service needs. */
        a.setAttribute(Qt::AA_NativeWindows);

# ifdef Q_OS_SOLARIS
#  if QT_VERSION < 0x050000
        /* Use plastique look&feel for Solaris instead of the default motif (Qt 4.7.x): */
        QApplication::setStyle(new QPlastiqueStyle);
#  else /* QT_VERSION >= 0x050000 */
	a.setStyle("fusion");
#  endif /* QT_VERSION >= 0x050000 */
# endif /* Q_OS_SOLARIS */

# ifndef Q_OS_SOLARIS
        /* Apply font fixes (after QApplication get created and instantiated font-family): */
        QFontDatabase fontDataBase;
        QString currentFamily(QApplication::font().family());
        bool isCurrentScaleable = fontDataBase.isScalable(currentFamily);
        QString subFamily(QFont::substitute(currentFamily));
        bool isSubScaleable = fontDataBase.isScalable(subFamily);
        if (isCurrentScaleable && !isSubScaleable)
#  if QT_VERSION >= 0x050000
            QFont::removeSubstitutions(currentFamily);
#  else /* QT_VERSION < 0x050000 */
            QFont::removeSubstitution(currentFamily);
#  endif /* QT_VERSION < 0x050000 */
# endif /* !Q_OS_SOLARIS */

        /* Qt version check (major.minor are sensitive, fix number is ignored): */
        if (VBoxGlobal::qtRTVersion() < (VBoxGlobal::qtCTVersion() & 0xFFFF00))
        {
            QString strMsg = QApplication::tr("Executable <b>%1</b> requires Qt %2.x, found Qt %3.")
                                              .arg(qAppName())
                                              .arg(VBoxGlobal::qtCTVersionString().section('.', 0, 1))
                                              .arg(VBoxGlobal::qtRTVersionString());
            QMessageBox::critical(0, QApplication::tr("Incompatible Qt Library Error"),
                                  strMsg, QMessageBox::Abort, 0);
            qFatal("%s", strMsg.toUtf8().constData());
            break;
        }
#endif /* VBOX_WS_X11 */

        /* Create modal-window manager: */
        UIModalWindowManager::create();

        /* Create global UI instance: */
        VBoxGlobal::create();

        /* Simulate try-catch block: */
        do