#ifndef PREFERENCEDIALOG_H#define PREFERENCEDIALOG_H#include <QDialog>class QCheckBox;class QGroupBox;class QLabel;class QLineEdit;class QListWidget;class QRadioButton;class QStackedLayout;class PreferenceDialog : public QDialog{    Q_OBJECTpublic:    PreferenceDialog(QWidget *parent = 0);private:    void createAppearancePage();    void createWebBrowserPage();    void createMailAndNewsPage();    void createAdvancedPage();    QStackedLayout *stackedLayout;    QListWidget *listWidget;    QWidget *appearancePage;    QWidget *webBrowserPage;    QWidget *mailAndNewsPage;    QWidget *advancedPage;    QPushButton *okButton;    QPushButton *cancelButton;    QGroupBox *openGroupBox;    QCheckBox *webBrowserCheckBox;    QCheckBox *mailEditorCheckBox;    QCheckBox *newsgroupCheckBox;    QGroupBox *toolbarsGroupBox;    QRadioButton *picturesAndTextRadioButton;    QRadioButton *picturesOnlyRadioButton;    QRadioButton *textOnlyRadioButton;    QCheckBox *tooltipsCheckBox;    QCheckBox *webSiteIconsCheckBox;    QCheckBox *resizeImagesCheckBox;    QGroupBox *displayGroupBox;    QRadioButton *blankRadioButton;    QRadioButton *homeRadioButton;    QRadioButton *lastRadioButton;    QGroupBox *homeGroupBox;    QLabel *locationLabel;    QLineEdit *locationLineEdit;    QGroupBox *webButtonsGroupBox;    QCheckBox *bookmarksCheckBox;    QCheckBox *goCheckBox;    QCheckBox *homeCheckBox;    QCheckBox *searchCheckBox;    QCheckBox *printCheckBox;    QGroupBox *generalGroupBox;    QCheckBox *confirmCheckBox;    QCheckBox *rememberCheckBox;    QGroupBox *mailButtonsGroupBox;    QCheckBox *fileCheckBox;    QCheckBox *nextCheckBox;    QCheckBox *stopCheckBox;    QCheckBox *junkCheckBox;    QGroupBox *featuresGroupBox;    QCheckBox *javaCheckBox;    QCheckBox *ftpCheckBox;    QLineEdit *ftpLineEdit;};#endif