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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** 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.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QGEOMAPOBJECTENGINE_P_H
#define QGEOMAPOBJECTENGINE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qmobilityglobal.h"
#include "qgeomapdata_p.h"
#include "qgeomapdata.h"
#include "qgeomapobject_p.h"
#include "qgeomapobject.h"
#include <QHash>
#include <QList>
class QTransform;
class QGraphicsItem;
class QGraphicsScene;
QTM_BEGIN_NAMESPACE
class QGeoMapObjectEngine : public QObject
{
Q_OBJECT
public:
QGeoMapObjectEngine(QGeoMapData *mapData, QGeoMapDataPrivate *mapDataP);
virtual ~QGeoMapObjectEngine();
QGeoMapData *md;
QGeoMapDataPrivate *mdp;
double exactMappingTolerance;
/*** Lookup hashes and scenes ***/
QHash<const QGeoMapObject*, QGraphicsItem*> latLonExact;
QHash<const QGeoMapObject*, QGraphicsItem*> pixelExact;
QHash<const QGeoMapObject*, QTransform> latLonTrans;
QGraphicsScene *latLonScene;
QHash<QGraphicsItem*, QGeoMapObject*> latLonItems;
QHash<QGeoMapObject*, QGraphicsItem*> latLonItemsRev;
QHash<const QGeoMapObject*, QTransform> pixelTrans;
QGraphicsScene *pixelScene;
QHash<QGraphicsItem*, QGeoMapObject*> pixelItems;
QHash<QGeoMapObject*, QGraphicsItem*> pixelItemsRev;
/*** Object management ***/
virtual void addObject(QGeoMapObject *object);
virtual void removeObject(QGeoMapObject *object);
/*** Updating and validity ***/
virtual void updateTransforms();
QList<QGeoMapObject*> objectsForPixelUpdate;
QList<QGeoMapObject*> objectsForLatLonUpdate;
virtual void updatePixelsForGroup(QGeoMapGroupObject *group);
virtual void updateLatLonsForGroup(QGeoMapGroupObject *group);
virtual void updateLatLonTransform(QGeoMapObject *object);
virtual void updatePixelTransform(QGeoMapObject *object);
virtual void rebuildScenes();
virtual void invalidateObject(QGeoMapObject *obj);
virtual void invalidateZoomDependents();
virtual void invalidatePixelsForViewport(bool updateNow=true);
virtual void trimPixelTransforms();
public:
/*** Exact transform functions ***/
// these are virtual so subclasses can add new types
// of exact transform
virtual bool exactMetersToSeconds(const QGeoCoordinate &origin,
QGeoMapObject *object,
QGraphicsItem *item,
QList<QPolygonF> &polys);
virtual bool exactSecondsToSeconds(const QGeoCoordinate &origin,
QGeoMapObject *object,
QGraphicsItem *item,
QList<QPolygonF> &polys);
virtual void exactPixelMap(const QGeoCoordinate &origin,
QGeoMapObject *object,
QList<QPolygonF> &polys);
/*** Bilinear transforms ***/
void bilinearMetersToSeconds(const QGeoCoordinate &origin,
QGraphicsItem *item,
QPolygonF &local,
QTransform &latLon);
void bilinearPixelsToSeconds(const QGeoCoordinate &origin,
QGraphicsItem *item,
QPolygonF &local,
QTransform &latLon);
void bilinearSecondsToScreen(const QGeoCoordinate &origin,
QGeoMapObject *object,
QList<QPolygonF> &polys);
/*** Pixel shift transforms ***/
void pixelShiftToScreen(const QGeoCoordinate &origin,
QGeoMapObject *object,
QList<QPolygonF> &polys);
/*** Misc ***/
virtual QGraphicsItem* graphicsItemFromMapObject(QGeoMapObject *object);
private:
/*** Internal helpers ***/
QPolygonF latLonViewport();
QPolygonF polyToScreen(const QPolygonF &poly);
Q_DISABLE_COPY(QGeoMapObjectEngine)
};
QTM_END_NAMESPACE
#endif // QGEOMAPOBJECTENGINE_P_H
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