/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** use the contact form at http://qt.digia.com/contact-us.
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** Alternatively, 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
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****************************************************************************/

#ifndef RESIZEMANIPULATOR_H
#define RESIZEMANIPULATOR_H

#include <QWeakPointer>
#include "resizehandleitem.h"
#include <snapper.h>
#include "rewritertransaction.h"
#include "formeditorview.h"

namespace QmlDesigner {

class ResizeHandleItem;
class Model;

class ResizeManipulator
{
public:
    enum Snapping {
        UseSnapping,
        UseSnappingAndAnchoring,
        NoSnapping
    };

    ResizeManipulator(LayerItem *layerItem, FormEditorView *view);
    ~ResizeManipulator();

    void setHandle(ResizeHandleItem *resizeHandle);
    void removeHandle();

    void begin(const QPointF& beginPoint);
    void update(const QPointF& updatePoint, Snapping useSnapping);
    void end();

    void moveBy(double deltaX, double deltaY);

    void clear();

    bool isActive() const;

protected:
    bool isInvalidSize(const QSizeF & size);
    void deleteSnapLines();
    ResizeHandleItem *resizeHandle();
    void setSize(QmlItemNode itemNode, const QSizeF &size);
    void setPosition(QmlItemNode itemNode, const QPointF &position);

private:
    Snapper m_snapper;
    QWeakPointer<FormEditorView> m_view;
    QList<QGraphicsItem*> m_graphicsLineList;
    ResizeController m_resizeController; // hold the controller so that the handle cant be deleted
    QTransform m_beginFromSceneTransform;
    QTransform m_beginToSceneTransform;
    QTransform m_beginToParentTransform;
    QRectF m_beginBoundingRect;
    QPointF m_beginBottomRightPoint;
    double m_beginTopMargin;
    double m_beginLeftMargin;
    double m_beginRightMargin;
    double m_beginBottomMargin;
    QWeakPointer<LayerItem> m_layerItem;
    ResizeHandleItem *m_resizeHandle;
    RewriterTransaction m_rewriterTransaction;
    bool m_isActive;
};

}
#endif // RESIZEMANIPULATOR_H
