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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "languagechooser.h"
#include "mainwindow.h"
#include <QCoreApplication>
#include <QCheckBox>
#include <QDialogButtonBox>
#include <QDir>
#include <QGridLayout>
#include <QGroupBox>
#include <QPushButton>
#include <QTranslator>
LanguageChooser::LanguageChooser(const QString &defaultLang, QWidget *parent)
: QDialog(parent, Qt::WindowStaysOnTopHint)
{
groupBox = new QGroupBox("Languages");
QGridLayout *groupBoxLayout = new QGridLayout;
const QStringList qmFiles = findQmFiles();
for (int i = 0; i < qmFiles.size(); ++i) {
const QString &qmlFile = qmFiles.at(i);
QCheckBox *checkBox = new QCheckBox(languageName(qmlFile));
qmFileForCheckBoxMap.insert(checkBox, qmlFile);
connect(checkBox, &QCheckBox::toggled,
this, &LanguageChooser::checkBoxToggled);
if (languageMatch(defaultLang, qmlFile))
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);
setWindowTitle("I18N");
}
bool LanguageChooser::languageMatch(QStringView lang, QStringView qmFile)
{
//qmFile: i18n_xx.qm
const QStringView prefix{ u"i18n_" };
const int langTokenLength = 2; /*FIXME: is checking two chars enough?*/
return qmFile.mid(qmFile.indexOf(prefix) + prefix.length(), langTokenLength) == lang.left(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 QDialog::eventFilter(object, event);
}
void LanguageChooser::closeEvent(QCloseEvent * /* event */)
{
QCoreApplication::quit();
}
void LanguageChooser::checkBoxToggled()
{
QCheckBox *checkBox = qobject_cast<QCheckBox *>(sender());
MainWindow *window = mainWindowForCheckBoxMap.value(checkBox);
if (!window) {
QTranslator translator;
const QString qmlFile = qmFileForCheckBoxMap.value(checkBox);
if (translator.load(qmlFile))
QCoreApplication::installTranslator(&translator);
else
qWarning("Unable to load %s", qPrintable(QDir::toNativeSeparators(qmlFile)));
window = new MainWindow;
window->setPalette(colorForLanguage(checkBox->text()));
window->installEventFilter(this);
mainWindowForCheckBoxMap.insert(checkBox, window);
}
window->setVisible(checkBox->isChecked());
}
void LanguageChooser::showAll()
{
for (auto it = qmFileForCheckBoxMap.keyBegin(); it != qmFileForCheckBoxMap.keyEnd(); ++it)
(*it)->setChecked(true);
}
void LanguageChooser::hideAll()
{
for (auto it = qmFileForCheckBoxMap.keyBegin(); it != qmFileForCheckBoxMap.keyEnd(); ++it)
(*it)->setChecked(false);
}
QStringList LanguageChooser::findQmFiles()
{
QDir dir(":/translations");
QStringList fileNames = dir.entryList(QStringList("*.qm"), QDir::Files,
QDir::Name);
for (QString &fileName : fileNames)
fileName = dir.filePath(fileName);
return fileNames;
}
QString LanguageChooser::languageName(const QString &qmFile)
{
QTranslator translator;
if (!translator.load(qmFile)) {
qWarning("Unable to load %s", qPrintable(QDir::toNativeSeparators(qmFile)));
return {};
}
return translator.translate("MainWindow", "English");
}
QColor LanguageChooser::colorForLanguage(const QString &language)
{
size_t 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);
}
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