C++ QFontDatabase::isPrivateFamily方法代码示例

void QFontComboBoxPrivate::_q_updateModel()
{
    Q_Q(QFontComboBox);
    const int scalableMask = (QFontComboBox::ScalableFonts | QFontComboBox::NonScalableFonts);
    const int spacingMask = (QFontComboBox::ProportionalFonts | QFontComboBox::MonospacedFonts);

    QStringListModel *m = qobject_cast<QStringListModel *>(q->model());
    if (!m)
        return;
    QFontFamilyDelegate *delegate = qobject_cast<QFontFamilyDelegate *>(q->view()->itemDelegate());
    QFontDatabase::WritingSystem system = delegate ? delegate->writingSystem : QFontDatabase::Any;

    QFontDatabase fdb;
    QStringList list = fdb.families(system);
    QStringList result;

    int offset = 0;
    QFontInfo fi(currentFont);

    for (int i = 0; i < list.size(); ++i) {
        if (fdb.isPrivateFamily(list.at(i)))
            continue;

        if ((filters & scalableMask) && (filters & scalableMask) != scalableMask) {
            if (bool(filters & QFontComboBox::ScalableFonts) != fdb.isSmoothlyScalable(list.at(i)))
                continue;
        }
        if ((filters & spacingMask) && (filters & spacingMask) != spacingMask) {
            if (bool(filters & QFontComboBox::MonospacedFonts) != fdb.isFixedPitch(list.at(i)))
                continue;
        }
        result += list.at(i);
        if (list.at(i) == fi.family() || list.at(i).startsWith(fi.family() + QLatin1String(" [")))
            offset = result.count() - 1;
    }
    list = result;

    //we need to block the signals so that the model doesn't emit reset
    //this prevents the current index from changing
    //it will be updated just after this
    ///TODO: we should finda way to avoid blocking signals and have a real update of the model
    {
        const QSignalBlocker blocker(m);
        m->setStringList(list);
    }

    if (list.isEmpty()) {
        if (currentFont != QFont()) {
            currentFont = QFont();
            emit q->currentFontChanged(currentFont);
        }
    } else {
        q->setCurrentIndex(offset);
    }
}

void QFontDialogPrivate::updateFamilies()
{
    Q_Q(QFontDialog);

    enum match_t { MATCH_NONE = 0, MATCH_LAST_RESORT = 1, MATCH_APP = 2, MATCH_FAMILY = 3 };

    const QFontDialog::FontDialogOptions scalableMask = (QFontDialog::ScalableFonts | QFontDialog::NonScalableFonts);
    const QFontDialog::FontDialogOptions spacingMask = (QFontDialog::ProportionalFonts | QFontDialog::MonospacedFonts);
    const QFontDialog::FontDialogOptions options = q->options();

    QFontDatabase fdb;

    QStringList familyNames;
    foreach (const QString &family, fdb.families(writingSystem)) {
        if (fdb.isPrivateFamily(family))
            continue;

        if ((options & scalableMask) && (options & scalableMask) != scalableMask) {
            if (bool(options & QFontDialog::ScalableFonts) != fdb.isSmoothlyScalable(family))
                continue;
        }
        if ((options & spacingMask) && (options & spacingMask) != spacingMask) {
            if (bool(options & QFontDialog::MonospacedFonts) != fdb.isFixedPitch(family))
                continue;
        }
        familyNames << family;
    }

    familyList->model()->setStringList(familyNames);

    QString foundryName1, familyName1, foundryName2, familyName2;
    int bestFamilyMatch = -1;
    match_t bestFamilyType = MATCH_NONE;

    QFont f;

    // ##### do the right thing for a list of family names in the font.
    QFontDatabase::parseFontName(family, foundryName1, familyName1);

    QStringList::const_iterator it = familyNames.constBegin();
    int i = 0;
    for(; it != familyNames.constEnd(); ++it, ++i) {
        QFontDatabase::parseFontName(*it, foundryName2, familyName2);

        //try to match...
        if (familyName1 == familyName2) {
            bestFamilyType = MATCH_FAMILY;
            if (foundryName1 == foundryName2) {
                bestFamilyMatch = i;
                break;
            }
            if (bestFamilyMatch < MATCH_FAMILY)
                bestFamilyMatch = i;
        }

        //and try some fall backs
        match_t type = MATCH_NONE;
        if (bestFamilyType <= MATCH_NONE && familyName2 == f.lastResortFamily())
            type = MATCH_LAST_RESORT;
        if (bestFamilyType <= MATCH_LAST_RESORT && familyName2 == f.family())
            type = MATCH_APP;
        // ### add fallback for writingSystem
        if (type != MATCH_NONE) {
            bestFamilyType = type;
            bestFamilyMatch = i;
        }
    }

    if (i != -1 && bestFamilyType != MATCH_NONE)
        familyList->setCurrentItem(bestFamilyMatch);
    else
        familyList->setCurrentItem(0);
    familyEdit->setText(familyList->currentText());
    if (q->style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, q)
            && familyList->hasFocus())
        familyEdit->selectAll();

    updateStyles();
}