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languagechooser.h Example File
tools/i18n/languagechooser.h

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 #ifndef LANGUAGECHOOSER_H
 #define LANGUAGECHOOSER_H

 #include <QDialog>
 #include <QMap>
 #include <QStringList>

 class QAbstractButton;
 class QCheckBox;
 class QDialogButtonBox;
 class QGroupBox;

 class MainWindow;

 class LanguageChooser : public QDialog
 {
     Q_OBJECT

 public:
     LanguageChooser(QWidget *parent = 0);

 protected:
     bool eventFilter(QObject *object, QEvent *event);
     void closeEvent(QCloseEvent *event);

 private slots:
     void checkBoxToggled();
     void showAll();
     void hideAll();

 private:
     QStringList findQmFiles();
     QString languageName(const QString &qmFile);
     QColor colorForLanguage(const QString &language);

     QGroupBox *groupBox;
     QDialogButtonBox *buttonBox;
     QAbstractButton *showAllButton;
     QAbstractButton *hideAllButton;
     QMap<QCheckBox *, QString> qmFileForCheckBoxMap;
     QMap<QCheckBox *, MainWindow *> mainWindowForCheckBoxMap;
 };

 #endif