Qt 4.8: Q3ImageDrag Class Reference

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# 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.

- List of all members, including inherited members

## 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

- 9 public functions inherited from Q3DragObject
- 29 public functions inherited from QObject
- 3 public functions inherited from QMimeSource

## 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
- 7 static public members inherited from QObject

### Additional Inherited Members

- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 1 signal inherited from QObject
- 1 protected function inherited from Q3DragObject
- 8 protected functions inherited from QObject

## 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.