/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#ifndef HSWIDGETPOSITIONINGONWIDGETADD_H

#define HSWIDGETPOSITIONINGONWIDGETADD_H

#include <QList>

#include <QRectF>

#include <QPointF>

#include "hsutils_global.h"

class HsWidgetHost;

class HSUTILS_EXPORT HsWidgetPositioningOnWidgetAdd

{

public:

    virtual ~HsWidgetPositioningOnWidgetAdd() {}

    virtual QList<QRectF> convert(const QRectF &contentArea,

                                  const QList<QRectF> &existingRects,

                                  const QList<QRectF> &newRects,

                                  const QPointF &startPoint) = 0;

    static void setInstance(HsWidgetPositioningOnWidgetAdd *instance);

    static HsWidgetPositioningOnWidgetAdd *instance();

private:

    static HsWidgetPositioningOnWidgetAdd *mInstance;

};

class HSUTILS_EXPORT HsAnchorPointInBottomRight : public HsWidgetPositioningOnWidgetAdd

{

public:

    QList<QRectF> convert(const QRectF &contentArea,

                          const QList<QRectF> &existingRects,

                          const QList<QRectF> &newRects,

                          const QPointF &startPoint);

};

class HSUTILS_EXPORT HsAnchorPointInCenter : public HsWidgetPositioningOnWidgetAdd

{

public:

    QList<QRectF> convert(const QRectF &contentArea,

                          const QList<QRectF> &existingRects,

                          const QList<QRectF> &newRects,

                          const QPointF &startPoint);

 };

class HSUTILS_EXPORT HsWidgetOrganizer : public HsWidgetPositioningOnWidgetAdd

{

public:

    QList<QRectF> convert(const QRectF &contentArea,

                          const QList<QRectF> &existingRects,

                          const QList<QRectF> &newRects,

                          const QPointF &startPoint);

private:

    bool initAnchors(const QSizeF &areaSize);

    bool getAnchorPoint(const QSizeF &contentSize);

    bool searchWidthSpace(const QSizeF &contentSize);

    bool searchHeightSpace(int contentHeight);

    bool markReservedAnchors();

    QPointF getAnchorCoordinates(int index);

    int getIndexForCoordinate(QPointF position);

    int lenghtInAnchorPoints(QVariant length);

private:

    int mAnchorColumns;

    int mAnchorRows;

    int mAnchorDistance;

    QPointF mStartWidthAnchorPoint;

    QPointF mEndWidthAnchorPoint;

    QPointF mEndHeightAnchorPoint;

    // TODO: is there better way to store anchor points, perhaps with pointers?

    QList<bool> mAnchors;

};

#endif // HSWIDGETPOSITIONINGONWIDGETADD_H