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connectionwidget.h Example File
demos/sqlbrowser/connectionwidget.h

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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 = 0);
     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