内容

• 公共函数
• 重实现公共函数
• 静态公共成员
• 详细描述

Q3ImageDrag Class

The Q3ImageDrag class provides a drag and drop object for transferring images. 更多...

头：	#include <Q3ImageDrag>
继承：	Q3DragObject

• 所有成员列表，包括继承成员

公共函数

	Q3ImageDrag (QImage image , QWidget * dragSource = 0, const char * name = 0)
	Q3ImageDrag (QWidget * dragSource = 0, const char * name = 0)
	~Q3ImageDrag ()
virtual void	setImage (QImage image )

重实现公共函数

virtual QByteArray	encodedData (const char * fmt ) const
virtual const char *	format (int i ) const

• 9 公共函数继承自 Q3DragObject
• 29 公共函数继承自 QObject
• 3 公共函数继承自 QMimeSource

静态公共成员

bool	canDecode (const QMimeSource * source )
bool	decode (const QMimeSource * source , QImage & image )
bool	decode (const QMimeSource * source , QPixmap & pixmap )

• 1 静态公共成员继承自 Q3DragObject
• 7 静态公共成员继承自 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
• 1 保护函数继承自 Q3DragObject
• 8 保护函数继承自 QObject

详细描述

The Q3ImageDrag class provides a drag and drop object for transferring images.

Images are offered to the receiving application in multiple formats, determined by Qt's output formats.

成员函数文档编制

Q3ImageDrag:: Q3ImageDrag ( QImage image , QWidget * dragSource = 0, const char * name = 0)

Constructs an image drag object with the given name , and sets its data to image 。 dragSource is the widget that the drag operation started from.

Q3ImageDrag:: Q3ImageDrag ( QWidget * dragSource = 0, const char * name = 0)

Constructs a default image drag object with the given name 。 dragSource is the widget that the drag operation started from.

Q3ImageDrag:: ~Q3ImageDrag ()

Destroys the image drag object.

[static] bool Q3ImageDrag:: canDecode (const QMimeSource * source )

Returns true if the information in the MIME source can be decoded into an image; otherwise returns false.

另请参阅 decode ().

[static] bool Q3ImageDrag:: decode (const QMimeSource * source , QImage & image )

Decode the dropped information in the MIME source 到 image . Returns true if successful; otherwise returns false.

另请参阅 canDecode ().

[static] bool Q3ImageDrag:: decode (const QMimeSource * source , QPixmap & pixmap )

这是重载函数。

Decodes the dropped information in the MIME source 到 pixmap . Returns true if successful; otherwise returns false.

This is a convenience function that converts the information to a QPixmap via a QImage .

另请参阅 canDecode ().

[虚拟] QByteArray Q3ImageDrag:: encodedData (const char * fmt ) const

重实现自 QMimeSource::encodedData ().

[虚拟] const char * Q3ImageDrag:: format ( int i ) const

重实现自 QMimeSource::format ().

[虚拟] void Q3ImageDrag:: setImage ( QImage image )

设置 image to be dragged. You will need to call this if you did not pass the image during construction.