dialog.h Example File

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  #ifndef DIALOG_H
  #define DIALOG_H

  #include <QtWidgets>
  #include <QtSql>
  #include <QtXml>

  class Dialog : public QDialog
  {
      Q_OBJECT

  public:
      Dialog(QSqlRelationalTableModel *albums, QDomDocument details,
             QFile *output, QWidget *parent = 0);

  private slots:
      void revert();
      void submit();

  private:
      int addNewAlbum(const QString &title, int artistId);
      int addNewArtist(const QString &name);
      void addTracks(int albumId, QStringList tracks);
      QDialogButtonBox *createButtons();
      QGroupBox *createInputWidgets();
      int findArtistId(const QString &artist);
      int generateAlbumId();
      int generateArtistId();
      void increaseAlbumCount(QModelIndex artistIndex);
      QModelIndex indexOfArtist(const QString &artist);

      QSqlRelationalTableModel *model;
      QDomDocument albumDetails;
      QFile *outputFile;

      QLineEdit *artistEditor;
      QLineEdit *titleEditor;
      QSpinBox *yearEditor;
      QLineEdit *tracksEditor;
  };

  #endif