QSqlDriverPlugin Class

The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver plugins. More...

Header: #include <QSqlDriverPlugin>
Inherits: QObject

Public Functions

QSqlDriverPlugin(QObject * parent = 0)

Reimplemented Public Functions

virtual QSqlDriver * create(const QString & key) = 0
virtual QStringList keys() const = 0
  • 29 public functions inherited from QObject

Additional Inherited Members

  • 1 property inherited from QObject
  • 1 public slot inherited from QObject
  • 1 signal inherited from QObject
  • 7 static public members inherited from QObject
  • 8 protected functions 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 functions keys() and create(), and exporting the class with the Q_EXPORT_PLUGIN2() macro. See the SQL plugins that come with Qt for example implementations (in the plugins/src/sqldrivers subdirectory of the source distribution).

See also How to Create Qt Plugins.

Member Function Documentation

QSqlDriverPlugin::QSqlDriverPlugin(QObject * parent = 0)

Constructs a SQL driver plugin and sets the parent to parent. This is invoked automatically by the Q_EXPORT_PLUGIN2() macro.


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 keys().

[pure virtual] QStringList QSqlDriverPlugin::keys() const

Returns the list of drivers (keys) this plugin supports.

These keys are usually the class names of the custom drivers that are implemented in the plugin.

See also create().

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