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106 lines
3.3 KiB
106 lines
3.3 KiB
/* This file is part of the KDE project
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Copyright (C) 2001 David Faure <faure@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef KMULTIPLEDRAG_H
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#define KMULTIPLEDRAG_H
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#ifndef QT_NO_DRAGANDDROP
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#include <tqdragobject.h>
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#include <tqvaluelist.h>
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#include "tdelibs_export.h"
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class KMultipleDragPrivate;
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/**
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* This class makes it easy for applications to provide a drag object
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* (for drag-n-drop or for clipboard) that has several representations
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* of the same data, under different formats.
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*
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* Instead of creating a specific class for each case (as would otherwise
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* be necessary), you can simply create independent drag objects (e.g.
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* a TQImageDrag object and a KURLDrag object), and bundle them together
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* using KMultipleDrag.
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*
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* Sample code for this:
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*
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* \code
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* KMultipleDrag *drag = new KMultipleDrag( parentWidget );
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* drag->addDragObject( new TQImageDrag( someQImage, 0 ) );
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* drag->addDragObject( new KURLDrag( someKURL, 0 ) );
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* drag->drag();
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* \endcode
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*
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* Note that the drag objects added to the multiple drag become owned by it.
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* For that reason their parent should be 0.
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*
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* @author David Faure <faure@kde.org>
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*/
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class TDECORE_EXPORT KMultipleDrag : public TQDragObject
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{
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Q_OBJECT
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public:
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/**
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* Create a new KMultipleDrag object.
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* @param dragSource the parent object which is the source of the data,
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* 0 for a parent-less object
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* @param name the name of the object, can be 0
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*/
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KMultipleDrag( TQWidget *dragSource = 0, const char *name = 0 );
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/**
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* Call this to add each underlying drag object to the multiple drag object.
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* The drag object should not have a parent because the multiple drag object
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* will own it.
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*
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* @param dragObject the drag object to add. Should have no parent object.
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*/
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void addDragObject( TQDragObject *dragObject );
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/**
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* Returns the data of a drag object with that supports the given
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* mime type.
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* @param mime the mime type to search
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* @return the data, or a null byte array if not found
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* @reimp
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*/
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virtual TQByteArray tqencodedData( const char *mime ) const;
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/**
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* Returns the @p i'th supported format, or 0.
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* @param i the number of the format to check
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* @return the format with the number @p i, or 0 otherwise
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* @reimp
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*/
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virtual const char* format( int i ) const;
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protected:
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// KDE4: make private
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TQPtrList<TQDragObject> m_dragObjects;
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TQValueList<int> m_numberFormats;
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protected:
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virtual void virtual_hook( int id, void* data );
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private:
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KMultipleDragPrivate* d;
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};
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#endif // QT_NO_DRAGANDDROP
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#endif // KMULTIPLEDRAG_H
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