#ifndef DIRECTORYVIEWER_H#define DIRECTORYVIEWER_H#include <QDialog>class QDirModel;class QPushButton;class QTreeView;class DirectoryViewer : public QDialog{    Q_OBJECTpublic:    DirectoryViewer(QWidget *parent = 0);private slots:    void createDirectory();    void remove();private:    QTreeView *treeView;    QDirModel *model;    QPushButton *mkdirButton;    QPushButton *removeButton;    QPushButton *quitButton;};#endif