kexidragobjects.cpp

/* This file is part of the KDE project
   Copyright (C) 2002, 2003 Joseph Wenninger <jowenn@kde.org>
   Copyright (C) 2005 Jaroslaw Staniek <js@iidea.pl>
 
   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 "kexidragobjects.h"
 
#include <tqcstring.h>
#include <tqdatastream.h>
#include <kdebug.h>
 
 
KexiFieldDrag::KexiFieldDrag(const TQString& sourceMimeType, const TQString& sourceName, 
    const TQString& field, TQWidget *parent, const char *name)
 : TQStoredDrag("kexi/field", parent, name)
{
    TQByteArray data;
    TQDataStream stream1(data,IO_WriteOnly);
    stream1 << sourceMimeType << sourceName << field;
    setEncodedData(data);
}
 
KexiFieldDrag::KexiFieldDrag(const TQString& sourceMimeType, const TQString& sourceName, 
    const TQStringList& fields, TQWidget *parent, const char *name)
 : TQStoredDrag((fields.count() > 1) ? "kexi/fields" : "kexi/field", parent, name)
{
    TQByteArray data;
    TQDataStream stream1(data,IO_WriteOnly);
    if (fields.count() > 1)
        stream1 << sourceMimeType << sourceName << fields;
    else {
        TQString field;
        if (fields.count() == 1)
            field = fields.first();
        else
            kexidbg << "KexiFieldDrag::KexiFieldDrag(): fields list is empty!" << endl;
        stream1 << sourceMimeType << sourceName << field;
    }
    setEncodedData(data);
}
 
KexiFieldDrag::~KexiFieldDrag()
{
}
 
bool
KexiFieldDrag::canDecodeSingle(TQMimeSource *e)
{
    return e->provides("kexi/field");
}
 
bool
KexiFieldDrag::canDecodeMultiple(TQMimeSource *e)
{
    return e->provides("kexi/field") || e->provides("kexi/fields");
}
 
bool
KexiFieldDrag::decodeSingle( TQDropEvent* e, TQString& sourceMimeType, 
    TQString& sourceName, TQString& field )
{
    TQByteArray payload( e->data("kexi/field") );
    if (payload.isEmpty())
        return false;
    e->accept();
    TQDataStream stream1(payload, IO_ReadOnly);
    stream1 >> sourceMimeType;
    stream1 >> sourceName;
    stream1 >> field;
//  kdDebug() << "KexiFieldDrag::decode() decoded: " << sourceMimeType<<"/"<<sourceName<<"/"<<field << endl;
    return true;
}
 
bool
KexiFieldDrag::decodeMultiple( TQDropEvent* e, TQString& sourceMimeType, 
    TQString& sourceName, TQStringList& fields )
{
    TQByteArray payload( e->data("kexi/fields") );
    if (payload.isEmpty()) {//try single
        TQString field;
        bool res = KexiFieldDrag::decodeSingle( e, sourceMimeType, sourceName, field );
        if (!res)
            return false;
        fields.append(field);
        return true;
    }
    e->accept();
    TQDataStream stream1(payload, IO_ReadOnly);
    stream1 >> sourceMimeType;
    stream1 >> sourceName;
    stream1 >> fields;
//  kdDebug() << "KexiFieldDrag::decode() decoded: " << sourceMimeType<<"/"<<sourceName<<"/"<<fields << endl;
    return true;
}
 
 
KexiDataProviderDrag::KexiDataProviderDrag(const TQString& sourceMimeType, const TQString& sourceName,
    TQWidget *parent, const char *name)
 : TQStoredDrag("kexi/dataprovider", parent, name)
{
    TQByteArray data;
    TQDataStream stream1(data,IO_WriteOnly);
    stream1 << sourceMimeType << sourceName;
    setEncodedData(data);
}
 
 
bool
KexiDataProviderDrag::canDecode(TQDragMoveEvent *e)
{
    return e->provides("kexi/dataprovider");
}
 
bool
KexiDataProviderDrag::decode( TQDropEvent* e, TQString& sourceMimeType, TQString& sourceName)
{
    TQCString tmp;
    TQByteArray payload = e->data("kexidataprovider");
    if(payload.size())
    {
        e->accept();
        TQDataStream stream1(payload, IO_ReadOnly);
        stream1 >> sourceMimeType;
        stream1 >> sourceName;
//      kdDebug() << "KexiDataProviderDrag::decode() decoded: " << sourceMimeType <<"/"<<sourceName<< endl;
        return true;
    }
    return false;
}