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emptymapadapter.cpp
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124 lines (107 loc) · 2.95 KB
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/*
*
* 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/
*
*/
#include "emptymapadapter.h"
namespace qmapcontrol
{
EmptyMapAdapter::EmptyMapAdapter(int tileSize, int minZoom, int maxZoom)
: MapAdapter("", "", 256, minZoom, maxZoom)
{
Q_UNUSED(tileSize)
PI = acos(-1.0);
mNumberOfTiles = tilesonzoomlevel(minZoom);
}
EmptyMapAdapter::~EmptyMapAdapter() { }
void EmptyMapAdapter::zoom_in()
{
if (mCurrent_zoom < mMax_zoom)
{
mCurrent_zoom = mCurrent_zoom + 1;
}
mNumberOfTiles = tilesonzoomlevel(mCurrent_zoom);
}
void EmptyMapAdapter::zoom_out()
{
if (mCurrent_zoom > mMin_zoom)
{
mCurrent_zoom = mCurrent_zoom - 1;
}
mNumberOfTiles = tilesonzoomlevel(mCurrent_zoom);
}
qreal EmptyMapAdapter::deg_rad(qreal x) const
{
return x * (PI / 180.0);
}
qreal EmptyMapAdapter::rad_deg(qreal x) const
{
return x * (180 / PI);
}
QString EmptyMapAdapter::query(int x, int y, int z) const
{
Q_UNUSED(x)
Q_UNUSED(y)
Q_UNUSED(z)
return QString();
}
QPoint EmptyMapAdapter::coordinateToDisplay(const QPointF &coordinate) const
{
qreal x
= (coordinate.x() + 180) * (mNumberOfTiles * mTileSize) / 360.; // coord to pixel!
qreal y = (1 - (log(tan(PI / 4 + deg_rad(coordinate.y()) / 2)) / PI)) / 2
* (mNumberOfTiles * mTileSize);
return QPoint(int(x), int(y));
}
QPointF EmptyMapAdapter::displayToCoordinate(const QPoint &point) const
{
qreal longitude = (point.x() * (360 / (mNumberOfTiles * mTileSize))) - 180;
qreal latitude
= rad_deg(atan(sinh((1 - point.y() * (2 / (mNumberOfTiles * mTileSize))) * PI)));
return QPointF(longitude, latitude);
}
bool EmptyMapAdapter::isTileValid(int x, int y, int z) const
{
if (mMax_zoom < mMin_zoom)
{
z = mMin_zoom - z;
}
bool result = true;
if (x < 0 || x > pow(2.0, z) - 1 || y < 0 || y > pow(2.0, z) - 1)
{
result = false;
}
return result;
}
int EmptyMapAdapter::tilesonzoomlevel(int zoomlevel) const
{
return int(pow(2.0, zoomlevel));
}
int EmptyMapAdapter::xoffset(int x) const
{
return x;
}
int EmptyMapAdapter::yoffset(int y) const
{
return y;
}
}