addressbook.h Example File
tutorials/addressbook/part4/addressbook.h

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 #ifndef ADDRESSBOOK_H
 #define ADDRESSBOOK_H

 #include <QWidget>
 #include <QMap>

 class QPushButton;
 class QLabel;
 class QLineEdit;
 class QTextEdit;

 class AddressBook : public QWidget
 {
     Q_OBJECT

 public:
     AddressBook(QWidget *parent = 0);
     enum Mode { NavigationMode, AddingMode, EditingMode };

 public slots:
     void addContact();
     void submitContact();
     void cancel();
     void editContact();
     void removeContact();
     void next();
     void previous();

 private:
     void updateInterface(Mode mode);
     QPushButton *addButton;
     QPushButton *editButton;
     QPushButton *removeButton;
     QPushButton *submitButton;
     QPushButton *cancelButton;
     QPushButton *nextButton;
     QPushButton *previousButton;
     QLineEdit *nameLine;
     QTextEdit *addressText;

     QMap<QString, QString> contacts;
     QString oldName;
     QString oldAddress;
     Mode currentMode;
 };

 #endif