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QScreenDriverPlugin Class Reference
^{[QtGui module]}

The QScreenDriverPlugin class is an abstract base class for graphics driver plugins. More...

#include <QScreenDriverPlugin>

Inherits QObject.

• List of all members, including inherited members

Public Functions

• QScreenDriverPlugin ( QObject * parent = 0 )
• ~QScreenDriverPlugin ()
• virtual QScreen * create ( const QString & key, int displayId ) = 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 QScreenDriverPlugin class is an abstract base class for graphics driver plugins.

Note that this class is only available in Qtopia Core.

QScreenDriverPlugin is a simple plugin interface that makes it easy to create custom graphics drivers that can be loaded dynamically into applications using the QScreenDriverFactory class.

Writing a custom graphics driver plugin is achieved by subclassing QScreenDriverPlugin, reimplementing the pure virtual keys() and create() functions, and exporting the class using the Q_EXPORT_PLUGIN2() macro. See How to Create Qt Plugins for details.

See also QScreen, QScreenDriverFactory, and Running Applications.

Member Function Documentation

QScreenDriverPlugin::QScreenDriverPlugin ( QObject * parent = 0 )

Constructs a graphics driver plugin with the given parent.

Note that this constructor is invoked automatically by the Q_EXPORT_PLUGIN2() macro, so there is no need for calling it explicitly.

QScreenDriverPlugin::~QScreenDriverPlugin ()

Destroys this graphics driver plugin.

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

QScreen * QScreenDriverPlugin::create ( const QString & key, int displayId )   [pure virtual]

Creates a plugin matching the driver specified by the given key, using the display specified by displayId. Keys are case-insensitive.

See also keys().

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

Returns the list of valid keys, i.e. the screen drivers supported by this plugin.

Qtopia Core currently supports the following drivers by default: QVfb (Qtopia Core's virtual framebuffer), LinuxFb (The Linux framebuffer), Transformed (for rotated displays) and VNC (a VNC server).

See also create().