/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** 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
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** 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
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/

#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