Qt Reference Documentation

Q3ImageDrag Class Reference

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

 #include <Q3ImageDrag>

This class is part of the Qt 3 support library. It is provided to keep old source code working. We strongly advise against using it in new code. See Porting to Qt 4 for more information.

Inherits Q3DragObject.

Public Functions

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

Reimplemented Public Functions

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

Static Public Members

bool canDecode ( const QMimeSource * source )
bool decode ( const QMimeSource * source, QImage & image )
bool decode ( const QMimeSource * source, QPixmap & pixmap )
  • 1 static public member inherited from Q3DragObject
  • 5 static public members inherited from QObject

Additional Inherited Members

Detailed Description

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.

Member Function Documentation

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. The 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. The dragSource is the widget that the drag operation started from.

Q3ImageDrag::~Q3ImageDrag ()

Destroys the image drag object.

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

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

See also decode().

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

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

See also canDecode().

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

This is an overloaded function.

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

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

See also canDecode().

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

Reimplemented from QMimeSource::encodedData().

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

Reimplemented from QMimeSource::format().

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

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

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