Question

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

#include <qsqldriverplugin.h>

List of all member functions.

Public Members

• QSqlDriverPlugin ()
• ~QSqlDriverPlugin ()
• virtual QStringList keys () const = 0
• virtual QSqlDriver * create ( constQString&key ) = 0

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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_PLUGIN macro. See the SQL plugins that come with Qt for example implementations (in the plugins/src/sqldrivers subdirectory of the source distribution). Read the plugins documentation for more information on plugins.

See also Plugins.

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Member Function Documentation

QSqlDriverPlugin::QSqlDriverPlugin ()

Constructs a SQL driver plugin. This is invoked automatically by the Q_EXPORT_PLUGIN macro.

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.

QSqlDriver* QSqlDriverPlugin::create ( constQString&key ) [pure virtual]

Creates and returns a QSqlDriver object for the driver key key. The driver key is usually the class name of the required driver.

See also keys().

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

Returns the list of driver keys this plugin supports.

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

See also create().