scrollingsurface.h

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/* @@@LICENSE
*
*      Copyright (c) 2010-2012 Hewlett-Packard Development Company, L.P.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
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#ifndef SCROLLINGSURFACE_H_
#define SCROLLINGSURFACE_H_

#include "scrollableobject.h"
#include <QRectF>
#include <QRect>
#include <QPointer>

class PixmapObject;
class QPainter;
class QGraphicsSceneMouseEvent;

class ScrollingSurface : public ScrollableObject
{
        Q_OBJECT
        Q_INTERFACES(QGraphicsItem)

public:

        ScrollingSurface(const QRectF& geometry);
        virtual ~ScrollingSurface();

        void setPixmapObject(PixmapObject * p_pmo);

        bool testAndtranslateScrollSurfacePointToPixmapPoint(const QPointF& point,QPoint& r_translatedPoint);

        virtual qint32 scrollValue() const;
        virtual void setScrollValue(qint32 v);
        virtual qint32 rawScrollValue() const;

public Q_SLOTS:

        //this one ignores content geom changes because it's bound to the pixmap.
        //TODO: revisit this idea; perhaps some tricky cool things can be done by messing
        // with the geom despite a fixed pixmap size
        virtual void slotSourceGeomChanged(const QRectF& newGeom);
        virtual void slotSourceContentSizeChanged(const QSizeF& newContentSize);
        virtual void slotSourceContentSizeChanged(const QSize& newContentSize);

protected:

        virtual void resetTargetRectValid();

        virtual void setSourceContentGeom(const QRectF& newContentGeom);

        virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option=0,QWidget *widget=0);

        QPointer<PixmapObject> m_qp_surfacePmo;
};

#endif /* SCROLLINGSURFACE_H_ */