#ifndef MAILCLIENT_H#define MAILCLIENT_H#include <QMainWindow>class QIcon;class QSplitter;class QTextEdit;class QTreeWidget;class MailClient : public QMainWindow{    Q_OBJECTpublic:    MailClient();protected:    void closeEvent(QCloseEvent *event);private:    void addFolder(const QIcon &icon, const QString &name);    void addMessage(const QString &subject, const QString &from,                    const QString &date);    void readSettings();    void writeSettings();    QSplitter *mainSplitter;    QSplitter *rightSplitter;    QTreeWidget *foldersTreeWidget;    QTreeWidget *messagesTreeWidget;    QTextEdit *textEdit;};#endif