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tdetoys/kworldwatch/cities.cpp

209 lines
4.3 KiB

/*
**
** Copyright (C) 1998-2001 by Matthias Hölzer-Klüpfel <hoelzer@kde.org>
** Maintainence has ceased - send questions to kde-devel@kde.org.
**
*/
/*
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program in a file called COPYING; if not, write to
** the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
** MA 02110-1301, USA.
*/
/*
** Bug reports and questions can be sent to kde-devel@kde.org
*/
#include <qfile.h>
#include <qtextstream.h>
#include <qregexp.h>
#include <qpainter.h>
#include <kglobal.h>
#include <kstandarddirs.h>
#include "cities.h"
CityList::CityList()
{
readCityLists();
}
CityList::~CityList()
{
_cities.setAutoDelete(true);
_cities.clear();
}
void CityList::readCityLists()
{
QStringList lists = KGlobal::dirs()->findAllResources("data", "kworldclock/*.tab");
for (QStringList::Iterator it = lists.begin(); it != lists.end(); ++it)
readCityList(*it);
}
double coordinate(QString c)
{
int neg;
int d=0, m=0, s=0;
neg = c.left(1) == "-";
c.remove(0,1);
switch (c.length())
{
case 4:
d = c.left(2).toInt();
m = c.mid(2).toInt();
break;
case 5:
d = c.left(3).toInt();
m = c.mid(3).toInt();
break;
case 6:
d = c.left(2).toInt();
m = c.mid(2,2).toInt();
s = c.right(2).toInt();
break;
case 7:
d = c.left(3).toInt();
m = c.mid(3,2).toInt();
s = c.right(2).toInt();
break;
default:
break;
}
if (neg)
return - (d + m/60.0 + s/3600.0);
else
return d + m/60.0 + s/3600.0;
}
void CityList::readCityList(const QString &fname)
{
QFile f(fname);
if (f.open(IO_ReadOnly))
{
QTextStream is(&f);
QString line;
QStringList tags;
QRegExp coord("[+-]\\d+[+-]\\d+");
QRegExp name("[^\\s]+/[^\\s]+");
int pos;
while (!is.eof())
{
line = is.readLine().stripWhiteSpace();
if (line.isEmpty() || line.left(1) == "#")
continue;
QString c, n;
pos = coord.search(line, 0);
if (pos >= 0)
c = line.mid(pos, coord.matchedLength());
pos = name.search(line, pos);
if (pos > 0)
n = line.mid(pos, name.matchedLength()).stripWhiteSpace();
if (!c.isEmpty() && !n.isEmpty())
{
double la, lo;
pos = c.find("+", 1);
if (pos < 0)
pos = c.find("-", 1);
if (pos > 0)
{
la = coordinate(c.left(pos));
lo = coordinate(c.mid(pos));
_cities.append(new City(n.latin1(), la, lo));
}
}
}
f.close();
}
}
QPoint CityList::getPosition(double la, double lo, int w, int h, int offset)
{
int x = (int)((double)w * (180.0 + lo) / 360.0);
int y = (int)((double)h * (90.0 - la) / 180.0);
x = (x + offset + w/2) % w;
return QPoint(x,y);
}
void CityList::paint(QPainter *p, int width, int height, int offset)
{
p->setPen(Qt::black);
QPtrListIterator<City> it(_cities);
for ( ; it.current(); ++it)
{
QPoint pos = getPosition(it.current()->latitude(), it.current()->longitude(), width, height, offset);
if (width > 100)
p->drawEllipse(pos.x(), pos.y(), 3,3);
else
p->drawPoint(pos);
}
}
City *CityList::getNearestCity(int w, int h, int offset, int x, int y, QPoint &where)
{
City *result = 0;
double dist = 1.0e10;
QPtrListIterator<City> it(_cities);
for ( ; it.current(); ++it)
{
QPoint pos = getPosition(it.current()->latitude(), it.current()->longitude(), w, h, offset);
double d = (pos.x()-x)*(pos.x()-x) + (pos.y()-y)*(pos.y()-y);
if (d < dist)
{
dist = d;
where = pos;
result = it.current();
}
}
return result;
}
QStringList CityList::timezones()
{
QStringList r;
QPtrListIterator<City> it(_cities);
for ( ; it.current(); ++it)
r << it.current()->name();
r.sort();
return r;
}