QPictureFormatPlugin Class

The QPictureFormatPlugin class provides an abstract base for custom picture format plugins. 更多...

頭：	#include <QPictureFormatPlugin>
繼承：	QObject

該類已過時。 提供它是為使舊源代碼能繼續工作。強烈建議不要在新代碼中使用它。

所有成員列錶，包括繼承成員

公共函數

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

重實現公共函數

virtual bool	installIOHandler (const QString & format ) = 0
virtual QStringList	keys () const = 0
virtual bool	loadPicture (const QString & format , const QString & fileName , QPicture * picture )
virtual bool	savePicture (const QString & format , const QString & fileName , const QPicture & picture )

29 公共函數繼承自 QObject

額外繼承成員

1 特性繼承自 QObject
1 公共槽繼承自 QObject
1 信號繼承自 QObject
7 靜態公共成員繼承自 QObject
8 保護函數繼承自 QObject

詳細描述

The QPictureFormatPlugin class provides an abstract base for custom picture format plugins.

The picture format plugin is a simple plugin interface that makes it easy to create custom picture formats that can be used transparently by applications.

Writing an picture format plugin is achieved by subclassing this base class, reimplementing the pure virtual functions keys (), loadPicture (), savePicture ()，和 installIOHandler ()，和導齣類采用 Q_EXPORT_PLUGIN2 () 宏。

另請參閱 如何創建 Qt 插件 .

成員函數文檔編製

QPictureFormatPlugin:: QPictureFormatPlugin ( QObject * parent = 0)

Constructs an picture format plugin with the given parent . This is invoked automatically by the Q_EXPORT_PLUGIN2 () 宏。

QPictureFormatPlugin:: ~QPictureFormatPlugin ()

銷毀圖片格式插件。

從不需要明確調用這。Qt 自動銷毀插件當不再使用時。

`[pure virtual]` bool QPictureFormatPlugin:: installIOHandler (const QString & format )

Installs a QPictureIO picture I/O handler for the picture format format .

另請參閱 keys ().

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

Returns the list of picture formats this plugin supports.

另請參閱 installIOHandler ().

`[虛擬]` bool QPictureFormatPlugin:: loadPicture (const QString & format , const QString & fileName , QPicture * picture )

Loads the picture stored in the file called fileName ，采用給定 format , into * picture . Returns true on success; otherwise returns false.

另請參閱 savePicture ().

`[虛擬]` bool QPictureFormatPlugin:: savePicture (const QString & format , const QString & fileName , const QPicture & picture )

Saves the given picture into the file called fileName ，使用指定 format . Returns true on success; otherwise returns false.

另請參閱 loadPicture ().

內容