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# mainwindow.h Example File
sql/masterdetail/mainwindow.h

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     #ifndef MAINWINDOW_H
     #define MAINWINDOW_H

     #include <QDomDocument>
     #include <QMainWindow>
     #include <QModelIndex>

     class QComboBox;
     class QFile;
     class QGroupBox;
     class QLabel;
     class QListWidget;
     class QSqlRelationalTableModel;
     class QTableView;

     class MainWindow : public QMainWindow
     {
         Q_OBJECT

     public:
         MainWindow(const QString &artistTable, const QString &albumTable,
                    QFile *albumDetails, QWidget *parent = 0);

     private slots:
         void about();
         void addAlbum();
         void changeArtist(int row);
         void deleteAlbum();
         void showAlbumDetails(QModelIndex index);
         void showArtistProfile(QModelIndex index);
         void updateHeader(QModelIndex, int, int);

     private:
         void adjustHeader();
         QGroupBox *createAlbumGroupBox();
         QGroupBox *createArtistGroupBox();
         QGroupBox *createDetailsGroupBox();
         void createMenuBar();
         void decreaseAlbumCount(QModelIndex artistIndex);
         void getTrackList(QDomNode album);
         QModelIndex indexOfArtist(const QString &artist);
         void readAlbumData();
         void removeAlbumFromDatabase(QModelIndex album);
         void removeAlbumFromFile(int id);
         void showImageLabel();

         QTableView *albumView;
         QComboBox *artistView;
         QListWidget *trackList;

         QLabel *iconLabel;
         QLabel *imageLabel;
         QLabel *profileLabel;
         QLabel *titleLabel;

         QDomDocument albumData;
         QFile *file;
         QSqlRelationalTableModel *model;
     };

     #endif