browser.h Example File

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 #ifndef BROWSER_H
 #define BROWSER_H

 #include <QWidget>
 #include <QSqlTableModel>
 #include "ui_browserwidget.h"

 class ConnectionWidget;
 QT_FORWARD_DECLARE_CLASS(QTableView)
 QT_FORWARD_DECLARE_CLASS(QPushButton)
 QT_FORWARD_DECLARE_CLASS(QTextEdit)
 QT_FORWARD_DECLARE_CLASS(QSqlError)

 class Browser: public QWidget, private Ui::Browser
 {
     Q_OBJECT
 public:
     Browser(QWidget *parent = nullptr);
     virtual ~Browser();

     QSqlError addConnection(const QString &driver, const QString &dbName, const QString &host,
                   const QString &user, const QString &passwd, int port = -1);

     void insertRow();
     void deleteRow();
     void updateActions();

 public slots:
     void exec();
     void showTable(const QString &table);
     void showMetaData(const QString &table);
     void addConnection();
     void currentChanged() { updateActions(); }
     void about();

     void on_insertRowAction_triggered()
     { insertRow(); }
     void on_deleteRowAction_triggered()
     { deleteRow(); }
     void on_fieldStrategyAction_triggered();
     void on_rowStrategyAction_triggered();
     void on_manualStrategyAction_triggered();
     void on_submitAction_triggered();
     void on_revertAction_triggered();
     void on_selectAction_triggered();
     void on_connectionWidget_tableActivated(const QString &table)
     { showTable(table); }
     void on_connectionWidget_metaDataRequested(const QString &table)
     { showMetaData(table); }
     void on_submitButton_clicked()
     {
         exec();
         sqlEdit->setFocus();
     }
     void on_clearButton_clicked()
     {
         sqlEdit->clear();
         sqlEdit->setFocus();
     }

 signals:
     void statusMessage(const QString &message);
 };

 class CustomModel: public QSqlTableModel
 {
     Q_OBJECT
 public:
     explicit CustomModel(QObject *parent = nullptr, QSqlDatabase db = QSqlDatabase())
         : QSqlTableModel(parent, db) {}

     QVariant data(const QModelIndex &idx, int role) const override
     {
         if (role == Qt::BackgroundRole && isDirty(idx))
             return QBrush(QColor(Qt::yellow));
         return QSqlTableModel::data(idx, role);
     }
 };

 #endif