Referencia de la Clase QIconDrag

The QIconDrag class supports drag and drop operations within a QIconView. Más...

#include <qiconview.h>

Diagrama de herencias de QIconDrag

Lista de todos los miembros.

Métodos públicos
	QIconDrag (QWidget *dragSource, const char *name=0)
virtual	~QIconDrag ()
void	append (const QIconDragItem &item, const QRect &pr, const QRect &tr)
virtual const char *	format (int i) const
virtual QByteArray	encodedData (const char *mime) const
	QIconDrag (QWidget *dragSource, const char *name=0)
virtual	~QIconDrag ()
void	append (const QIconDragItem &item, const QRect &pr, const QRect &tr)
virtual const char *	format (int i) const
virtual QByteArray	encodedData (const char *mime) const
Métodos públicos estáticos
static bool	canDecode (QMimeSource *e)
static bool	canDecode (QMimeSource *e)
Amigas
class	QIconView
class	QIconViewPrivate

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Descripción detallada

The QIconDrag class supports drag and drop operations within a QIconView.

iconview

A QIconDrag object is used to maintain information about the positions of dragged items and the data associated with the dragged items. QIconViews are able to use this information to paint the dragged items in the correct positions. Internally QIconDrag stores the data associated with drag items in QIconDragItem objects.

If you want to use the extended drag-and-drop functionality of QIconView, create a QIconDrag object in a reimplementation of QIconView::dragObject(). Then create a QIconDragItem for each item which should be dragged, set the data it represents with QIconDragItem::setData(), and add each QIconDragItem to the drag object using append().

The data in QIconDragItems is stored in a QByteArray and is mime-typed (see QMimeSource and the Drag and Drop overview). If you want to use your own mime-types derive a class from QIconDrag and reimplement format(), encodedData() and canDecode().

The fileiconview example program demonstrates the use of the QIconDrag class including subclassing and reimplementing dragObject(), format(), encodedData() and canDecode(). See the files qt/examples/fileiconview/qfileiconview.h and qt/examples/fileiconview/qfileiconview.cpp.

Ver también:

QMimeSource::format()

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Documentación del constructor y destructor

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

Constructs a drag object called name, which is a child of dragSource.

Note that the drag object will be deleted when dragSource is deleted.

QIconDrag::~QIconDrag

(

)

[virtual]

Destructor.

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

virtual QIconDrag::~QIconDrag

(

)

[virtual]

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Documentación de las funciones miembro

void QIconDrag::append	(	const QIconDragItem &	i,
		const QRect &	pr,
		const QRect &	tr
	)

Append the QIconDragItem, i, to the QIconDrag object's list of items. You must also supply the geometry of the pixmap, pr, and the textual caption, tr.

Ver también:

QIconDragItem

void QIconDrag::append	(	const QIconDragItem &	item,
		const QRect &	pr,
		const QRect &	tr
	)

static bool QIconDrag::canDecode

(

QMimeSource *

e

)

[static]

bool QIconDrag::canDecode

(

QMimeSource *

e

)

[static]

Returns TRUE if e can be decoded by the QIconDrag, otherwise return FALSE.

QByteArray QIconDrag::encodedData

(

const char *

mime

)

const [virtual]

Returns the encoded data of the drag object if mime is application/x-qiconlist.

Implementa QMimeSource.

virtual QByteArray QIconDrag::encodedData

(

const char *

)

const [virtual]

Returns the encoded data of this object in the specified MIME format.

Subclasses must reimplement this function.

Implementa QMimeSource.

virtual const char* QIconDrag::format

(

int

i

)

const [virtual]

Returns the {i}-th supported MIME format, or 0.

Implementa QMimeSource.

const char * QIconDrag::format

(

int

i

)

const [virtual]

Implementa QMimeSource.

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Documentación de las funciones relacionadas y clases amigas

QIconView [friend]

QIconViewPrivate [friend]

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La documentación para esta clase fue generada a partir de los siguientes ficheros:

• src/qt/include/qiconview.h
• src/qt/src/iconview/qiconview.h
• src/qt/src/iconview/qiconview.cpp