QSqlDriverPlugin Class
The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver plugins. More...
| Header: | #include <QSqlDriverPlugin> |
| qmake: | QT += sql |
| Inherits: | QObject |
Public Functions
| QSqlDriverPlugin(QObject *parent = Q_NULLPTR) | |
| ~QSqlDriverPlugin() | |
| virtual QSqlDriver * | create(const QString &key) = 0 |
- 31 public functions inherited from QObject
Additional Inherited Members
- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 2 signals inherited from QObject
- 1 public variable inherited from QObject
- 10 static public members inherited from QObject
- 9 protected functions inherited from QObject
- 2 protected variables inherited from QObject
Detailed Description
The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver plugins.
The SQL driver plugin is a simple plugin interface that makes it easy to create your own SQL driver plugins that can be loaded dynamically by Qt.
Writing a SQL plugin is achieved by subclassing this base class, reimplementing the pure virtual function create(), and exporting the class with the Q_PLUGIN_METADATA() macro. See the SQL plugins that come with Qt for example implementations (in the plugins/src/sqldrivers subdirectory of the source distribution).
The json file containing the metadata for the plugin contains a list of keys indicating the supported sql drivers
{ "Keys": [ "mysqldriver" ] }
See also How to Create Qt Plugins.
Member Function Documentation
QSqlDriverPlugin::QSqlDriverPlugin(QObject *parent = Q_NULLPTR)
Constructs a SQL driver plugin and sets the parent to parent. This is invoked automatically by the moc generated code that exports the plugin.
QSqlDriverPlugin::~QSqlDriverPlugin()
Destroys the SQL driver plugin.
You never have to call this explicitly. Qt destroys a plugin automatically when it is no longer used.
[pure virtual] QSqlDriver *QSqlDriverPlugin::create(const QString &key)
Creates and returns a QSqlDriver object for the driver called key. The driver key is usually the class name of the required driver. Keys are case sensitive.
See also How to Create Qt Plugins.