KColorMimeData.cpp

/* This file is part of the KDE libraries
   Copyright (C) 1999 Steffen Hansen (hansen@kde.org)
   Copyright (C) 2005 Joseph Wenninger (jowenn@kde.org)

   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 "KColorMimeData.h"

#include <QColor>
#include <QDrag>
#include <QMimeData>
#include <QPainter>

void
KColorMimeData::populateMimeData( QMimeData *mimeData, const QColor &color )
{
    mimeData->setColorData( color );
    mimeData->setText( color.name() );
}

bool
KColorMimeData::canDecode( const QMimeData *mimeData )
{
    if ( mimeData->hasColor() )
        return true;
    if ( mimeData->hasText() ) {
        const QString colorName = mimeData->text();
        if ( ( colorName.length() >= 4 ) && ( colorName[0] == '#' ) )
            return true;
    }
    return false;
}

QColor
KColorMimeData::fromMimeData( const QMimeData *mimeData )
{
    if ( mimeData->hasColor() )
        return mimeData->colorData().value<QColor>();
    if ( canDecode( mimeData ) )
        return QColor( mimeData->text() );
    return QColor();
}


QDrag*
KColorMimeData::createDrag( const QColor &color, QWidget *dragsource )
{
    QDrag *drag = new QDrag( dragsource );
    QMimeData *mime = new QMimeData;
    populateMimeData( mime, color );
    drag->setMimeData( mime );
    QPixmap colorpix( 25, 20 );
    colorpix.fill( color );
    QPainter p( &colorpix );
    p.setPen( Qt::black );
    p.drawRect( 0, 0, 24, 19 );
    p.end();
    drag->setPixmap( colorpix );
    drag->setHotSpot( QPoint( -5, -7 ) );
    return drag;
}