QGenericPlugin Class | Qt GUI 5.12.6

Qt 5.12 | Qt GUI | C++ Classes | QGenericPlugin

Qt 5.12.6 Reference Documentation

# QGenericPlugin Class

The QGenericPlugin class is an abstract base class for plugins. More...

Header: | #include <QGenericPlugin>
qmake: | QT += gui
Inherits: | QObject

- List of all members, including inherited members
- Obsolete members

## Public Functions

| QGenericPlugin(QObject *parent = nullptr)
virtual | ~QGenericPlugin()
virtual QObject * | create(const QString &key, const QString &specification) = 0

- 31 public functions inherited from QObject

## Static Public Members

const QMetaObject | staticMetaObject

- 9 static public members inherited from QObject

### Additional Inherited Members

- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 2 signals inherited from QObject
- 9 protected functions inherited from QObject

## Detailed Description

The QGenericPlugin class is an abstract base class for plugins.

A mouse plugin can be created by subclassing QGenericPlugin and reimplementing the pure virtual create() function. By exporting the derived class using the Q_PLUGIN_METADATA() macro, The default implementation of the QGenericPluginFactory class will automatically detect the plugin and load the driver into the server application at run-time. See How to Create Qt Plugins for details.

The json metadata file should contain a list of keys supported by this plugin.

See also QGenericPluginFactory.

## Member Function Documentation

### QGenericPlugin::QGenericPlugin(QObject *parent = nullptr)

Constructs a plugin with the given parent.

Note that this constructor is invoked automatically by the moc generated code that exports the plugin, so there is no need for calling it explicitly.

### `[virtual]` QGenericPlugin::~QGenericPlugin()

Destroys the plugin.

Note that Qt destroys a plugin automatically when it is no longer used, so there is no need for calling the destructor explicitly.

### `[pure virtual]` QObject *QGenericPlugin::create(const QString &key, const QString &specification)

Implement this function to create a driver matching the type specified by the given key and specification parameters. Note that keys are case-insensitive.