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# QStylePlugin Class Reference
[QtGui module]

The QStylePlugin class provides an abstract base for custom QStyle plugins. More...

    #include <QStylePlugin>

Inherits QObject.

- List of all members, including inherited members

### Public Functions

- QStylePlugin ( QObject * parent = 0 )
- ~QStylePlugin ()
- virtual QStyle * create ( const QString & key ) = 0
- virtual QStringList keys () const = 0

- 28 public functions inherited from QObject

### Additional Inherited Members

- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 1 signal inherited from QObject
- 4 static public members inherited from QObject
- 7 protected functions inherited from QObject

## Detailed Description

The QStylePlugin class provides an abstract base for custom QStyle plugins.

The style plugin is a simple plugin interface that makes it easy to create custom styles that can be loaded dynamically into applications with a QStyleFactory.

Writing a style 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 also How to Create Qt Plugins.

## Member Function Documentation

### QStylePlugin::QStylePlugin ( QObject * parent = 0 )

Constructs a style plugin with parent parent. This is invoked automatically by the Q_EXPORT_PLUGIN2() macro.

### QStylePlugin::~QStylePlugin ()

Destroys the style plugin.

You never have to call this explicitly. Qt destroys a plugin automatically when it is no longer used.

### QStyle * QStylePlugin::create ( const QString & key ) `[pure virtual]`

Creates and returns a QStyle object for the style key key. The style key is usually the class name of the required style. Keys are case insensitive.

Example:

        QStringList MyStylePlugin::keys() const
        {
            return QStringList() << "Rocket" << "StarBuster";
        }

        QStyle *MyStylePlugin::create(const QString &key)
        {
            QString lcKey = key;
            if (lcKey == "rocket") {
                return new RocketStyle;
            } else if (lcKey == "starbuster") {
                return new StarBusterStyle;
            }
            return 0;
        }

See also keys().

### QStringList QStylePlugin::keys () const `[pure virtual]`

Returns the list of style keys this plugin supports.

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

See also create().