QScreenDriverPlugin Class

The QScreenDriverPlugin class is an abstract base class for screen driver plugins in Qt for Embedded Linux. 更多...

头：	#include <QScreenDriverPlugin>
继承：	QObject

所有成员列表，包括继承成员

公共函数

	QScreenDriverPlugin (QObject * parent = 0)
	~QScreenDriverPlugin ()

重实现公共函数

virtual QScreen *	create (const QString & key , int displayId ) = 0
virtual QStringList	keys () const = 0

29 公共函数继承自 QObject

额外继承成员

1 特性继承自 QObject
1 公共槽继承自 QObject
1 信号继承自 QObject
7 静态公共成员继承自 QObject
8 保护函数继承自 QObject

详细描述

The QScreenDriverPlugin class is an abstract base class for screen driver plugins in Qt for Embedded Linux.

注意，此类只可用于 Qt for Embedded Linux .

Qt for Embedded Linux provides ready-made drivers for several screen protocols, see the display management documentation for details. Custom screen drivers can be implemented by subclassing the QScreen class and creating a screen driver plugin.

A screen driver plugin can be created by subclassing QScreenDriverPlugin and reimplementing the pure virtual keys () 和 create () functions. By exporting the derived class using the Q_EXPORT_PLUGIN2 () macro, The default implementation of the QScreenDriverFactory class will automatically detect the plugin and load the driver into the server application at run-time. See 如何创建 Qt 插件了解细节。

另请参阅 QScreen and QScreenDriverFactory .

成员函数文档编制

QScreenDriverPlugin:: QScreenDriverPlugin ( QObject * parent = 0)

Constructs a screen 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 screen 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.

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

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

另请参阅 keys ().

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

Implement this function to return the list of valid keys, i.e. the screen drivers supported by this plugin.

Qt for Embedded Linux provides ready-made drivers for several screen protocols, see the display management 文档编制了解细节。

另请参阅 create ().

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