languagechooser.cpp Example File

tools/i18n/languagechooser.cpp
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#include <QtWidgets> #include "languagechooser.h" #include "mainwindow.h" #if 0 // Used to be included in Qt4 for Q_WS_MAC extern void qt_mac_set_menubar_merge(bool merge); #endif LanguageChooser::LanguageChooser(const QString& defaultLang, QWidget *parent) : QDialog(parent, Qt::WindowStaysOnTopHint) { groupBox = new QGroupBox("Languages"); QGridLayout *groupBoxLayout = new QGridLayout; QStringList qmFiles = findQmFiles(); for (int i = 0; i < qmFiles.size(); ++i) { QCheckBox *checkBox = new QCheckBox(languageName(qmFiles[i])); qmFileForCheckBoxMap.insert(checkBox, qmFiles[i]); connect(checkBox, QOverload<bool>::of(&QCheckBox::toggled), this, &LanguageChooser::checkBoxToggled); if (languageMatch(defaultLang, qmFiles[i])) checkBox->setCheckState(Qt::Checked); groupBoxLayout->addWidget(checkBox, i / 2, i % 2); } groupBox->setLayout(groupBoxLayout); buttonBox = new QDialogButtonBox; showAllButton = buttonBox->addButton("Show All", QDialogButtonBox::ActionRole); hideAllButton = buttonBox->addButton("Hide All", QDialogButtonBox::ActionRole); connect(showAllButton, &QAbstractButton::clicked, this, &LanguageChooser::showAll); connect(hideAllButton, &QAbstractButton::clicked, this, &LanguageChooser::hideAll); QVBoxLayout *mainLayout = new QVBoxLayout; mainLayout->addWidget(groupBox); mainLayout->addWidget(buttonBox); setLayout(mainLayout); #if 0 // Used to be included in Qt4 for Q_WS_MAC qt_mac_set_menubar_merge(false); #endif setWindowTitle("I18N"); } bool LanguageChooser::languageMatch(const QString& lang, const QString& qmFile) { //qmFile: i18n_xx.qm const QString prefix = "i18n_"; const int langTokenLength = 2; /*FIXME: is checking two chars enough?*/ return qmFile.midRef(qmFile.indexOf(prefix) + prefix.length(), langTokenLength) == lang.leftRef(langTokenLength); } bool LanguageChooser::eventFilter(QObject *object, QEvent *event) { if (event->type() == QEvent::Close) { MainWindow *window = qobject_cast<MainWindow *>(object); if (window) { QCheckBox *checkBox = mainWindowForCheckBoxMap.key(window); if (checkBox) checkBox->setChecked(false); } } return QWidget::eventFilter(object, event); } void LanguageChooser::closeEvent(QCloseEvent * /* event */) { qApp->quit(); } void LanguageChooser::checkBoxToggled() { QCheckBox *checkBox = qobject_cast<QCheckBox *>(sender()); MainWindow *window = mainWindowForCheckBoxMap[checkBox]; if (!window) { QTranslator translator; translator.load(qmFileForCheckBoxMap[checkBox]); qApp->installTranslator(&translator); window = new MainWindow; window->setPalette(colorForLanguage(checkBox->text())); window->installEventFilter(this); mainWindowForCheckBoxMap.insert(checkBox, window); } window->setVisible(checkBox->isChecked()); } void LanguageChooser::showAll() { foreach (QCheckBox *checkBox, qmFileForCheckBoxMap.keys()) checkBox->setChecked(true); } void LanguageChooser::hideAll() { foreach (QCheckBox *checkBox, qmFileForCheckBoxMap.keys()) checkBox->setChecked(false); } QStringList LanguageChooser::findQmFiles() { QDir dir(":/translations"); QStringList fileNames = dir.entryList(QStringList("*.qm"), QDir::Files, QDir::Name); QMutableStringListIterator i(fileNames); while (i.hasNext()) { i.next(); i.setValue(dir.filePath(i.value())); } return fileNames; } QString LanguageChooser::languageName(const QString &qmFile) { QTranslator translator; translator.load(qmFile); return translator.translate("MainWindow", "English"); } QColor LanguageChooser::colorForLanguage(const QString &language) { uint hashValue = qHash(language); int red = 156 + (hashValue & 0x3F); int green = 156 + ((hashValue >> 6) & 0x3F); int blue = 156 + ((hashValue >> 12) & 0x3F); return QColor(red, green, blue); }