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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "languagechooser.h"

    45 #include "mainwindow.h"

    46 

    47 #ifdef Q_WS_MAC

    48 QT_BEGIN_NAMESPACE

    49 extern void qt_mac_set_menubar_merge(bool merge);

    50 QT_END_NAMESPACE

    51 #endif

    52 

    53 LanguageChooser::LanguageChooser(QWidget *parent)

    54     : QDialog(parent, Qt::WindowStaysOnTopHint)

    55 {

    56     groupBox = new QGroupBox("Languages");

    57 

    58     QGridLayout *groupBoxLayout = new QGridLayout;

    59 

    60     QStringList qmFiles = findQmFiles();

    61     for (int i = 0; i < qmFiles.size(); ++i) {

    62         QCheckBox *checkBox = new QCheckBox(languageName(qmFiles[i]));

    63         qmFileForCheckBoxMap.insert(checkBox, qmFiles[i]);

    64         connect(checkBox, SIGNAL(toggled(bool)), this, SLOT(checkBoxToggled()));

    65         groupBoxLayout->addWidget(checkBox, i / 2, i % 2);

    66     }

    67     groupBox->setLayout(groupBoxLayout);

    68 

    69     buttonBox = new QDialogButtonBox;

    70 

    71     showAllButton = buttonBox->addButton("Show All",

    72                                          QDialogButtonBox::ActionRole);

    73     hideAllButton = buttonBox->addButton("Hide All",

    74                                          QDialogButtonBox::ActionRole);

    75 

    76     connect(showAllButton, SIGNAL(clicked()), this, SLOT(showAll()));

    77     connect(hideAllButton, SIGNAL(clicked()), this, SLOT(hideAll()));

    78 

    79     QVBoxLayout *mainLayout = new QVBoxLayout;

    80     mainLayout->addWidget(groupBox);

    81     mainLayout->addWidget(buttonBox);

    82     setLayout(mainLayout);

    83 

    84 #ifdef Q_WS_MAC

    85     qt_mac_set_menubar_merge(false);

    86 #endif

    87 

    88     setWindowTitle("I18N");

    89 }

    90 

    91 bool LanguageChooser::eventFilter(QObject *object, QEvent *event)

    92 {

    93     if (event->type() == QEvent::Close) {

    94         MainWindow *window = qobject_cast<MainWindow *>(object);

    95         if (window) {

    96             QCheckBox *checkBox = mainWindowForCheckBoxMap.key(window);

    97             if (checkBox)

    98                 checkBox->setChecked(false);

    99         }

   100     }

   101     return QWidget::eventFilter(object, event);

   102 }

   103 

   104 void LanguageChooser::closeEvent(QCloseEvent * /* event */)

   105 {

   106     qApp->quit();

   107 }

   108 

   109 void LanguageChooser::checkBoxToggled()

   110 {

   111     QCheckBox *checkBox = qobject_cast<QCheckBox *>(sender());

   112     MainWindow *window = mainWindowForCheckBoxMap[checkBox];

   113     if (!window) {

   114         QTranslator translator;

   115         translator.load(qmFileForCheckBoxMap[checkBox]);

   116         qApp->installTranslator(&translator);

   117 

   118         window = new MainWindow;

   119         window->setPalette(colorForLanguage(checkBox->text()));

   120 

   121         window->installEventFilter(this);

   122         mainWindowForCheckBoxMap.insert(checkBox, window);

   123     }

   124     window->setVisible(checkBox->isChecked());

   125 }

   126 

   127 void LanguageChooser::showAll()

   128 {

   129     foreach (QCheckBox *checkBox, qmFileForCheckBoxMap.keys())

   130         checkBox->setChecked(true);

   131 }

   132 

   133 void LanguageChooser::hideAll()

   134 {

   135     foreach (QCheckBox *checkBox, qmFileForCheckBoxMap.keys())

   136         checkBox->setChecked(false);

   137 }

   138 

   139 QStringList LanguageChooser::findQmFiles()

   140 {

   141     QDir dir(":/translations");

   142     QStringList fileNames = dir.entryList(QStringList("*.qm"), QDir::Files,

   143                                           QDir::Name);

   144     QMutableStringListIterator i(fileNames);

   145     while (i.hasNext()) {

   146         i.next();

   147         i.setValue(dir.filePath(i.value()));

   148     }

   149     return fileNames;

   150 }

   151 

   152 QString LanguageChooser::languageName(const QString &qmFile)

   153 {

   154     QTranslator translator;

   155     translator.load(qmFile);

   156 

   157     return translator.translate("MainWindow", "English");

   158 }

   159 

   160 QColor LanguageChooser::colorForLanguage(const QString &language)

   161 {

   162     uint hashValue = qHash(language);

   163     int red = 156 + (hashValue & 0x3F);

   164     int green = 156 + ((hashValue >> 6) & 0x3F);

   165     int blue = 156 + ((hashValue >> 12) & 0x3F);

   166     return QColor(red, green, blue);

   167 }