QSqlDriverPlugin Class Reference [модуль QtSql]
The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver plugins. Далее...
#include <QSqlDriverPlugin> Унаследован от: QObject.
Открытые функции
- 29 открытых функций, унаследованных от QObject
Дополнительные унаследованные члены
- 1 свойство, унаследованное от QObject
- 1 открытый слот, унаследованный от QObject
- 1 сигнал, унаследованный от QObject
- 5 статических открытых членов, унаследованных от QObject
- 7 защищенных функций, унаследованных от QObject
Подробное описание
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.
Описание функций-членов
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.
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 ( const QString & key ) [pure virtual]
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.
Смотрите также keys().
QStringList QSqlDriverPlugin::keys () const [pure virtual]
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.
Смотрите также create().
Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies) |
Торговые марки |
Qt 4.5.3 |
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