/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** 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.
**
** 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at info@qt.nokia.com.
**
**************************************************************************/

#ifndef RESIZECONTROLLER_H
#define RESIZECONTROLLER_H

#include <QWeakPointer>
#include <QSharedPointer>


namespace QmlDesigner {

class FormEditorItem;
class LayerItem;
class ResizeHandleItem;


class ResizeControllerData
{
public:
    ResizeControllerData(LayerItem *layerItem,
                         FormEditorItem *formEditorItem);
    ResizeControllerData(const ResizeControllerData &other);
    ~ResizeControllerData();


    QWeakPointer<LayerItem> layerItem;
    QWeakPointer<FormEditorItem> formEditorItem;
    ResizeHandleItem *topLeftItem;
    ResizeHandleItem *topRightItem;
    ResizeHandleItem *bottomLeftItem;
    ResizeHandleItem *bottomRightItem;
    ResizeHandleItem *topItem;
    ResizeHandleItem *leftItem;
    ResizeHandleItem *rightItem;
    ResizeHandleItem *bottomItem;
};




class ResizeController
{
public:
    friend class ResizeHandleItem;

    ResizeController();
    ResizeController(LayerItem *layerItem, FormEditorItem *formEditorItem);

    void show();
    void hide();

    void updatePosition();

    bool isValid() const;

    FormEditorItem *formEditorItem() const;

    bool isTopLeftHandle(const ResizeHandleItem *handle) const;
    bool isTopRightHandle(const ResizeHandleItem *handle) const;
    bool isBottomLeftHandle(const ResizeHandleItem *handle) const;
    bool isBottomRightHandle(const ResizeHandleItem *handle) const;

    bool isTopHandle(const ResizeHandleItem *handle) const;
    bool isLeftHandle(const ResizeHandleItem *handle) const;
    bool isRightHandle(const ResizeHandleItem *handle) const;
    bool isBottomHandle(const ResizeHandleItem *handle) const;

private: // functions
    ResizeController(const QSharedPointer<ResizeControllerData> &data);
    QWeakPointer<ResizeControllerData> weakPointer() const;
private: // variables
    QSharedPointer<ResizeControllerData> m_data;
};

}

#endif // RESIZECONTROLLER_H
