- Qt 5.5
- Qt Widgets
- Validators Example
- localeselector.cpp Example File
- Qt 5.5.1 Reference Documentation

# localeselector.cpp Example File

widgets/validators/localeselector.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
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    ** This file is part of the examples of the Qt Toolkit.
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    ** $QT_BEGIN_LICENSE:BSD$
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    #include "localeselector.h"

    #include <QLocale>

    LocaleSelector::LocaleSelector(QWidget *parent)
        : QComboBox(parent)
    {
        int curIndex = -1;
        int index = 0;
        for (int _lang = QLocale::C; _lang <= QLocale::LastLanguage; ++_lang) {
            QLocale::Language lang = static_cast<QLocale::Language>(_lang);
            foreach (const QLocale &l, QLocale::matchingLocales(lang, QLocale::AnyScript, QLocale::AnyCountry)) {
                QString label = QLocale::languageToString(l.language());
                label += QLatin1Char('/');
                label += QLocale::countryToString(l.country());
                // distinguish locales by script, if there are more than one script for a language/country pair
                if (QLocale::matchingLocales(l.language(), QLocale::AnyScript, l.country()).size() > 1)
                    label += QLatin1String(" (") + QLocale::scriptToString(l.script()) + QLatin1Char(')');

                addItem(label, QVariant::fromValue(l));

                if (l.language() == locale().language() && l.country() == locale().country()
                    && (locale().script() == QLocale::AnyScript || l.script() == locale().script())) {
                    curIndex = index;
                }
                ++index;
            }
        }
        if (curIndex != -1)
            setCurrentIndex(curIndex);

        connect(this, SIGNAL(activated(int)), this, SLOT(emitLocaleSelected(int)));
    }

    void LocaleSelector::emitLocaleSelected(int index)
    {
        QVariant v = itemData(index);
        if (!v.isValid())
            return;
        const QLocale l = v.value<QLocale>();
        emit localeSelected(l);
    }