0,0 → 1,73 |
/* |
* |
* This file is part of QMapControl, |
* an open-source cross-platform map widget |
* |
* Copyright (C) 2007 - 2008 Kai Winter |
* |
* This program is free software: you can redistribute it and/or modify |
* it under the terms of the GNU Lesser General Public License as published by |
* the Free Software Foundation, either version 3 of the License, or |
* (at your option) any later version. |
* |
* This program is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
* GNU Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public License |
* along with QMapControl. If not, see <http://www.gnu.org/licenses/>. |
* |
* Contact e-mail: kaiwinter@gmx.de |
* Program URL : http://qmapcontrol.sourceforge.net/ |
* |
*/ |
|
#ifndef EMPTYMAPADAPTER_H |
#define EMPTYMAPADAPTER_H |
|
#include "mapadapter.h" |
|
namespace qmapcontrol |
{ |
//! MapAdapter which do not load map tiles. |
/*! |
* The EmptyMapAdapter can be used if QMapControl should not load any map tiles. This is useful if you |
* only want to display an image through a FixedImageOverlay e.g. |
* @author Kai Winter <kaiwinter@gmx.de> |
*/ |
class EmptyMapAdapter : public MapAdapter |
{ |
Q_OBJECT |
public: |
//! Constructor. |
/*! |
* @param tileSize This parameter seems unnecessary for this type of MapAdaper on first sight. But since |
* this parameter defines the size of the offscreen image it could be used for a little performance |
* tuning (larger offscreen-images have to be redrawed less times). |
* @param minZoom the minimum zoom level |
* @param maxZoom the maximum zoom level |
*/ |
EmptyMapAdapter(int tileSize = 256, int minZoom = 0, int maxZoom = 17); |
|
virtual ~EmptyMapAdapter(); |
|
virtual QPoint coordinateToDisplay(const QPointF&) const; |
virtual QPointF displayToCoordinate(const QPoint&) const; |
|
qreal PI; |
|
protected: |
qreal rad_deg(qreal) const; |
qreal deg_rad(qreal) const; |
|
virtual bool isValid(int x, int y, int z) const; |
virtual void zoom_in(); |
virtual void zoom_out(); |
virtual QString query(int x, int y, int z) const; |
virtual int tilesonzoomlevel(int zoomlevel) const; |
virtual int xoffset(int x) const; |
virtual int yoffset(int y) const; |
}; |
} |
#endif |