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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
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** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
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#include <QtGui>
#include "languagechooser.h"
#include "mainwindow.h"
#ifdef Q_WS_MAC
extern void qt_mac_set_menubar_merge(bool merge);
#endif
LanguageChooser::LanguageChooser(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, SIGNAL(toggled(bool)), this, SLOT(checkBoxToggled()));
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, SIGNAL(clicked()), this, SLOT(showAll()));
connect(hideAllButton, SIGNAL(clicked()), this, SLOT(hideAll()));
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(groupBox);
mainLayout->addWidget(buttonBox);
setLayout(mainLayout);
#ifdef Q_WS_MAC
qt_mac_set_menubar_merge(false);
#endif
setWindowTitle("I18N");
}
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);
}</pre>
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