NodeLayout.h

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/*
 *   Copyright (C) 2007, 2008, 2009, 2010 Ivan Cukic <ivan.cukic(at)kde.org>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser/Library General Public License version 2,
 *   or (at your option) any later version, as published by the Free
 *   Software Foundation
 *
 *   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 Lesser/Library General Public License for more details
 *
 *   You should have received a copy of the GNU Lesser/Library General Public
 *   License along with this program; if not, write to the
 *   Free Software Foundation, Inc.,
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef LANCELOT_NODE_LAYOUT_H
#define LANCELOT_NODE_LAYOUT_H

#include <QtCore/QMap>
#include <QGraphicsLayout>

#include <cmath>

#include <lancelot/lancelot_export.h>

namespace Lancelot {

class LANCELOT_EXPORT NodeLayout : public QGraphicsLayout {
public:
    class LANCELOT_EXPORT NodeCoordinate {
    public:
        explicit NodeCoordinate(qreal xRelative = 0, qreal yRelative = 0, qreal xAbsolute = 0, qreal yAbsolute = 0);

        enum CoordinateType {
            Relative = 0,
            Absolute = 1,
            InnerRelative = 2 };

        static NodeCoordinate simple(qreal x, qreal y, CoordinateType xType = Relative, CoordinateType yType = Relative);

        qreal xr, xa;
        qreal yr, ya;
    };

    explicit NodeLayout(QGraphicsLayoutItem * parent = 0);

    virtual ~NodeLayout();

    void addItem(QGraphicsLayoutItem * item);

    void addItem(QGraphicsLayoutItem * item,
            NodeCoordinate topLeft, NodeCoordinate bottomRight);

    void addItem(QGraphicsLayoutItem * item,
            NodeCoordinate node, qreal xr = 0, qreal yr = 0);

    L_Override void setGeometry(const QRectF & rect);
    L_Override int count() const;
    L_Override QGraphicsLayoutItem * itemAt(int i) const;
    L_Override void removeAt(int index);
    L_Override QSizeF sizeHint(Qt::SizeHint which,
            const QSizeF & constraint = QSizeF()) const;

private:
    class Private;
    Private * const d;
};

} // namespace Lancelot

#endif /* LANCELOT_NODE_LAYOUT_H */