karbon_drag.cpp

/* This file is part of the KDE project
   Copyright (C) 2001, 2002, 2003 The Karbon Developers
 
   This library 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, or (at your option) any later version.
 
   This library 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 library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#include "karbon_drag.h"
 
#include <tqcstring.h>
#include <tqdom.h>
#include <tqtextstream.h>
 
#include "vdocument.h"
 
TQCString KarbonDrag::m_encodeFormats[NumEncodeFmts];
TQCString KarbonDrag::m_decodeFormats[NumDecodeFmts];
 
KarbonDrag::KarbonDrag( TQWidget *dragSource, const char *name )
 : TQDragObject( dragSource, name )
{
    m_encodeFormats[0] = "application/vnd.kde.karbon";
    m_decodeFormats[0] = "application/vnd.kde.karbon";
}
 
const char *
KarbonDrag::format( int i ) const
{
    if( i < NumEncodeFmts ) {
        return m_encodeFormats[i];
    }
 
    return 0L;
}
 
TQByteArray
KarbonDrag::encodedData( const char* mimetype ) const
{
    TQCString result;
 
    if( m_encodeFormats[0] == mimetype )
    {
        VObjectListIterator itr( m_objects );
        // build a xml fragment containing the selection as karbon xml
        TQDomDocument doc( "clip" );
        TQDomElement elem = doc.createElement( "clip" );
        TQTextStream ts( result, IO_WriteOnly );
 
        for( ; itr.current() ; ++itr )
            itr.current()->save( elem );
 
        ts << elem;
    }
 
    return result;
}
 
bool
KarbonDrag::canDecode( TQMimeSource* e)
{
    for( int i = 0; i < NumDecodeFmts; i++ )
    {
        if( e->provides( m_decodeFormats[i] ) )
            return true;
    }
 
    return false;
}
 
bool
KarbonDrag::decode( TQMimeSource* e, VObjectList& sl, VDocument& vdoc )
{
    if( e->provides( m_decodeFormats[0] ) )
    {
        TQDomDocument doc( "clip" );
        TQByteArray data = e->encodedData( m_decodeFormats[0] );
        doc.setContent( TQCString( data, data.size()+1 ) );
        TQDomElement clip = doc.documentElement();
        // Try to parse the clipboard data
        if( clip.tagName() == "clip" )
        {
            VGroup grp( &vdoc );
            grp.load( clip );
            VObjectListIterator itr( grp.objects() );
            for( ; itr.current() ; ++itr )
            {
                VObject *obj = itr.current()->clone();
                obj->setParent( 0L );
                sl.append( obj );
            }
 
            return true;
        }
    }
 
    return false;
}
 
void
KarbonDrag::setObjectList( VObjectList l )
{
    VObjectListIterator itr( l );
    m_objects.clear();
 
    for( ; itr.current() ; ++itr )
        m_objects.append( itr.current()->clone() );
}
 
#include "karbon_drag.moc"