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Diffstat (limited to 'tdecore/kmultipledrag.h')
-rw-r--r-- | tdecore/kmultipledrag.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/tdecore/kmultipledrag.h b/tdecore/kmultipledrag.h new file mode 100644 index 000000000..2490ec694 --- /dev/null +++ b/tdecore/kmultipledrag.h @@ -0,0 +1,105 @@ +/* This file is part of the KDE project + Copyright (C) 2001 David Faure <faure@kde.org> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this program; see the file COPYING. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +#ifndef KMULTIPLEDRAG_H +#define KMULTIPLEDRAG_H + +#ifndef QT_NO_DRAGANDDROP + +#include <tqdragobject.h> +#include <tqvaluelist.h> +#include "kdelibs_export.h" + +class KMultipleDragPrivate; +/** + * This class makes it easy for applications to provide a drag object + * (for drag-n-drop or for clipboard) that has several representations + * of the same data, under different formats. + * + * Instead of creating a specific class for each case (as would otherwise + * be necessary), you can simply create independent drag objects (e.g. + * a TQImageDrag object and a KURLDrag object), and bundle them together + * using KMultipleDrag. + * + * Sample code for this: + * + * \code + * KMultipleDrag *drag = new KMultipleDrag( parentWidget ); + * drag->addDragObject( new TQImageDrag( someQImage, 0 ) ); + * drag->addDragObject( new KURLDrag( someKURL, 0 ) ); + * drag->drag(); + * \endcode + * + * Note that the drag objects added to the multiple drag become owned by it. + * For that reason their parent should be 0. + * + * @author David Faure <faure@kde.org> + */ +class KDECORE_EXPORT KMultipleDrag : public TQDragObject +{ + Q_OBJECT + +public: + /** + * Create a new KMultipleDrag object. + * @param dragSource the parent object which is the source of the data, + * 0 for a parent-less object + * @param name the name of the object, can be 0 + */ + KMultipleDrag( TQWidget *dragSource = 0, const char *name = 0 ); + + /** + * Call this to add each underlying drag object to the multiple drag object. + * The drag object should not have a parent because the multiple drag object + * will own it. + * + * @param dragObject the drag object to add. Should have no parent object. + */ + void addDragObject( TQDragObject *dragObject ); + + /** + * Returns the data of a drag object with that supports the given + * mime type. + * @param mime the mime type to search + * @return the data, or a null byte array if not found + * @reimp + */ + virtual TQByteArray tqencodedData( const char *mime ) const; + + /** + * Returns the @p i'th supported format, or 0. + * @param i the number of the format to check + * @return the format with the number @p i, or 0 otherwise + * @reimp + */ + virtual const char* format( int i ) const; + +protected: +// KDE4: make private + TQPtrList<TQDragObject> m_dragObjects; + TQValueList<int> m_numberFormats; +protected: + virtual void virtual_hook( int id, void* data ); +private: + KMultipleDragPrivate* d; +}; + +#endif // QT_NO_DRAGANDDROP + +#endif // KMULTIPLEDRAG_H |