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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QTGRADIENTSTOPSMODEL_H
#define QTGRADIENTSTOPSMODEL_H

#include <QtCore/QObject>
#include <QtCore/QMap>

QT_BEGIN_NAMESPACE

class QColor;

class QtGradientStopsModel;

class QtGradientStop
{
public:
    qreal position() const;
    QColor color() const;
    QtGradientStopsModel *gradientModel() const;

private:
    void setColor(const QColor &color);
    void setPosition(qreal position);
    friend class QtGradientStopsModel;
    QtGradientStop(QtGradientStopsModel *model = 0);
    ~QtGradientStop();
    QScopedPointer<class QtGradientStopPrivate> d_ptr;
};

class QtGradientStopsModel : public QObject
{
    Q_OBJECT
public:
    typedef QMap<qreal, QtGradientStop *> PositionStopMap;

    QtGradientStopsModel(QObject *parent = 0);
    ~QtGradientStopsModel();

    PositionStopMap stops() const;
    QtGradientStop *at(qreal pos) const;
    QColor color(qreal pos) const; // calculated between points
    QList<QtGradientStop *> selectedStops() const;
    QtGradientStop *currentStop() const;
    bool isSelected(QtGradientStop *stop) const;
    QtGradientStop *firstSelected() const;
    QtGradientStop *lastSelected() const;
    QtGradientStopsModel *clone() const;

    QtGradientStop *addStop(qreal pos, const QColor &color);
    void removeStop(QtGradientStop *stop);
    void moveStop(QtGradientStop *stop, qreal newPos);
    void swapStops(QtGradientStop *stop1, QtGradientStop *stop2);
    void changeStop(QtGradientStop *stop, const QColor &newColor);
    void selectStop(QtGradientStop *stop, bool select);
    void setCurrentStop(QtGradientStop *stop);

    void moveStops(double newPosition); // moves current stop to newPos and all selected stops are moved accordingly
    void clear();
    void clearSelection();
    void flipAll();
    void selectAll();
    void deleteStops();

signals:
    void stopAdded(QtGradientStop *stop);
    void stopRemoved(QtGradientStop *stop);
    void stopMoved(QtGradientStop *stop, qreal newPos);
    void stopsSwapped(QtGradientStop *stop1, QtGradientStop *stop2);
    void stopChanged(QtGradientStop *stop, const QColor &newColor);
    void stopSelected(QtGradientStop *stop, bool selected);
    void currentStopChanged(QtGradientStop *stop);

private:
    QScopedPointer<class QtGradientStopsModelPrivate> d_ptr;
    Q_DECLARE_PRIVATE(QtGradientStopsModel)
    Q_DISABLE_COPY(QtGradientStopsModel)
};

QT_END_NAMESPACE

#endif