connectionwidget.h Example File

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  #ifndef CONNECTIONWIDGET_H
  #define CONNECTIONWIDGET_H

  #include <QWidget>

  QT_FORWARD_DECLARE_CLASS(QTreeWidget)
  QT_FORWARD_DECLARE_CLASS(QTreeWidgetItem)
  QT_FORWARD_DECLARE_CLASS(QSqlDatabase)
  QT_FORWARD_DECLARE_CLASS(QMenu)

  class ConnectionWidget: public QWidget
  {
      Q_OBJECT
  public:
      ConnectionWidget(QWidget *parent = nullptr);
      virtual ~ConnectionWidget();

      QSqlDatabase currentDatabase() const;

  signals:
      void tableActivated(const QString &table);
      void metaDataRequested(const QString &tableName);

  public slots:
      void refresh();
      void showMetaData();
      void on_tree_itemActivated(QTreeWidgetItem *item, int column);
      void on_tree_currentItemChanged(QTreeWidgetItem *current, QTreeWidgetItem *previous);

  private:
      void setActive(QTreeWidgetItem *);

      QTreeWidget *tree;
      QAction *metaDataAction;
      QString activeDb;
  };

  #endif