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add a widget that downloads the tiles of higher zoom levels of the

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currently visible area
This commit is contained in:
Niels 2010-06-10 23:52:34 +02:00
parent f236bb8248
commit 38c7c10bcf
9 changed files with 318 additions and 21 deletions
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196
downloadwidget.cpp Normal file
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@ -0,0 +1,196 @@
/*
* Copyright 2010 Niels Kummerfeldt <niels.kummerfeldt@tu-harburg.de>
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "downloadwidget.h"
#include <cmath>
#include <QtCore/QDebug>
#include <QtCore/QDir>
#include <QtCore/QFile>
#include <QtGui/QLayout>
#include <QtGui/QPushButton>
#include <QtNetwork/QNetworkReply>
#include <QtNetwork/QNetworkRequest>
DownloadWidget::DownloadWidget(QWidget *parent)
: QWidget(parent),
m_manager(new QNetworkAccessManager(this)),
m_startLevel(0),
m_dlRect(),
m_dlList(),
m_up(new QLabel("N 0", this)),
m_left(new QLabel("E 0", this)),
m_right(new QLabel("E 0", this)),
m_bottom(new QLabel("N 0", this)),
m_levelSpinBox(new QSpinBox(this)),
m_dlProgress(new QProgressBar(this))
{
QGridLayout *layout = new QGridLayout(this);
layout->setContentsMargins(0, 0, 0, 0);
layout->setRowStretch(1, 1);
m_up->setAlignment(Qt::AlignHCenter);
m_left->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
m_right->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
m_bottom->setAlignment(Qt::AlignHCenter);
layout->addWidget(m_up, 0, 0, 1, 4);
layout->addWidget(m_left, 1, 0);
layout->addWidget(m_right, 1, 3);
layout->addWidget(m_bottom, 2, 0, 1, 4);
QLabel *label = new QLabel(this);
label->setFrameShape(QLabel::Box);
layout->addWidget(label, 1, 1, 1, 2);
label = new QLabel("Download up to level", this);
layout->addWidget(label, 3, 0, 1, 2);
m_levelSpinBox->setRange(0, 18);
layout->addWidget(m_levelSpinBox, 3, 2, 1, 2);
m_dlProgress->setFormat("%v / %m");
layout->addWidget(m_dlProgress, 4, 0, 1, 4);
QPushButton *start = new QPushButton("&Start", this);
connect(start, SIGNAL(clicked()), this, SLOT(startDownload()));
layout->addWidget(start, 5, 0, 1, 2);
QPushButton *back = new QPushButton("&Back", this);
connect(back, SIGNAL(clicked()), this, SIGNAL(back()));
layout->addWidget(back, 5, 2, 1, 2);
connect(m_manager, SIGNAL(finished(QNetworkReply*)),
this, SLOT(replyFinished(QNetworkReply*)));
resize(320, 240);
}
DownloadWidget::~DownloadWidget()
{
}
void DownloadWidget::setStartLevel(int level)
{
if (level >= 17) {
level = 17;
}
m_startLevel = level + 1;
m_levelSpinBox->setMinimum(level + 1);
m_levelSpinBox->setValue(level + 1);
}
void DownloadWidget::setDownloadRect(const QRectF &rect)
{
m_dlRect = rect;
m_up->setText(lat2string(rect.bottom()));
m_left->setText(lon2string(rect.left()));
m_right->setText(lon2string(rect.right()));
m_bottom->setText(lat2string(rect.top()));
}
void DownloadWidget::startDownload()
{
m_dlProgress->setValue(0);
for (int level = m_startLevel; level <= m_levelSpinBox->value(); ++level) {
int max = pow(2, level) - 1;
int minX = qBound(0, lon2tilex(m_dlRect.left(), level), max);
int minY = qBound(0, lat2tiley(m_dlRect.bottom(), level), max);
int maxX = qBound(0, lon2tilex(m_dlRect.right(), level), max);
int maxY = qBound(0, lat2tiley(m_dlRect.top(), level), max);
for (int x = minX; x <= maxX; ++x) {
for (int y = minY; y <= maxY; ++y) {
m_dlList << QString("http://tile.openstreetmap.org/%1/%2/%3.png").arg(level).arg(x).arg(y);
}
}
}
if (!m_dlList.isEmpty()) {
m_dlProgress->setRange(0, m_dlList.count());
QUrl url(m_dlList.takeFirst());
m_manager->get(QNetworkRequest(url));
}
}
void DownloadWidget::replyFinished(QNetworkReply *reply)
{
if (reply->error() == QNetworkReply::NoError) {
QString path = reply->url().path();
int level = path.section('/', 1, 1).toInt();
int x = path.section('/', 2, 2).toInt();
QDir base(QDir::homePath()+"/Maps/OSM");
base.mkpath(QString("%1/%2").arg(level).arg(x));
QByteArray data = reply->readAll();
if (!data.isEmpty()) {
QFile file(QDir::homePath()+"/Maps/OSM"+path);
if (file.open(QFile::WriteOnly)) {
file.write(data);
}
}
if (!m_dlList.isEmpty()) {
QUrl url(m_dlList.takeFirst());
m_manager->get(QNetworkRequest(url));
}
int n = m_dlProgress->value();
m_dlProgress->setValue(n+1);
}
reply->deleteLater();
}
QString DownloadWidget::lon2string(qreal lon)
{
QString result;
if (lon < 0) {
result = "W ";
lon *= -1;
} else {
result = "E ";
}
result.append(QString::number(lon));
return result;
}
QString DownloadWidget::lat2string(qreal lat)
{
QString result;
if (lat < 0) {
result = "S ";
lat *= -1;
} else {
result = "N ";
}
result.append(QString::number(lat));
return result;
}
int DownloadWidget::lon2tilex(qreal lon, int z)
{
return (int)(floor((lon + 180.0) / 360.0 * pow(2.0, z)));
}
int DownloadWidget::lat2tiley(qreal lat, int z)
{
return (int)(floor((1.0 - log(tan(lat * M_PI/180.0) + 1.0 / cos(lat * M_PI/180.0)) / M_PI) / 2.0 * pow(2.0, z)));
}

62
downloadwidget.h Normal file
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@ -0,0 +1,62 @@
/*
* Copyright 2010 Niels Kummerfeldt <niels.kummerfeldt@tu-harburg.de>
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#ifndef DOWNLOADWIDGET_H
#define DOWNLOADWIDGET_H
#include <QtGui/QLabel>
#include <QtGui/QProgressBar>
#include <QtGui/QSpinBox>
#include <QtGui/QWidget>
#include <QtNetwork/QNetworkAccessManager>
class DownloadWidget : public QWidget
{
Q_OBJECT
public:
DownloadWidget(QWidget *parent = 0);
~DownloadWidget();
void setStartLevel(int level);
void setDownloadRect(const QRectF &rect);
signals:
void back();
private slots:
void startDownload();
void replyFinished(QNetworkReply *reply);
private:
QString lon2string(qreal lon);
QString lat2string(qreal lat);
int lon2tilex(qreal lon, int z);
int lat2tiley(qreal lat, int z);
QNetworkAccessManager *m_manager;
int m_startLevel;
QRectF m_dlRect;
QStringList m_dlList;
QLabel *m_up, *m_left, *m_right, *m_bottom;
QSpinBox *m_levelSpinBox;
QProgressBar *m_dlProgress;
};
#endif // DOWNLOADWIDGET_H

3
main.cpp
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@ -17,9 +17,10 @@
* Boston, MA 02110-1301 USA
*/
#include <QtGui/QApplication>
#include "mainwidget.h"
#include <QtGui/QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);

18
mainwidget.cpp
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@ -19,6 +19,7 @@
#include "mainwidget.h"
#include "downloadwidget.h"
#include "mapwidget.h"
#include "markerlist.h"
@ -28,21 +29,27 @@ MainWidget::MainWidget(QWidget *parent)
: QWidget(parent),
m_stack(new QStackedWidget(this)),
m_map(new MapWidget(this)),
m_markerList(new MarkerList(this))
m_markerList(new MarkerList(this)),
m_dlWidget(new DownloadWidget(this))
{
QHBoxLayout *layout = new QHBoxLayout(this);
layout->setContentsMargins(0, 0, 0, 0);
layout->addWidget(m_stack);
connect(m_map, SIGNAL(switchView()), this, SLOT(showList()));
connect(m_map, SIGNAL(showMarkerList()), this, SLOT(showList()));
connect(m_map, SIGNAL(markerAdded(QString)), this, SLOT(markerAdded(QString)));
connect(m_map, SIGNAL(downloadArea(int, QRectF)), this, SLOT(downloadArea(int, QRectF)));
m_stack->insertWidget(0, m_map);
connect(m_markerList, SIGNAL(back()), this, SLOT(showMap()));
connect(m_markerList, SIGNAL(centerOnMarker(int)), this, SLOT(centerOnMarker(int)));
connect(m_markerList, SIGNAL(removeMarker(int)), this, SLOT(removeMarker(int)));
connect(m_markerList, SIGNAL(markerRenamed(int, QString)), this, SLOT(markerRenamed(int, QString)));
m_stack->insertWidget(1, m_markerList);
connect(m_dlWidget, SIGNAL(back()), this, SLOT(showMap()));
m_stack->insertWidget(2, m_dlWidget);
resize(320, 240);
}
@ -81,3 +88,10 @@ void MainWidget::markerRenamed(int index, const QString &name)
m_map->renameMarker(index, name);
}
void MainWidget::downloadArea(int level, const QRectF &rect)
{
m_dlWidget->setStartLevel(level);
m_dlWidget->setDownloadRect(rect);
m_stack->setCurrentIndex(2);
}

4
mainwidget.h
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@ -24,13 +24,13 @@
#include <QtGui/QStackedWidget>
#include <QtGui/QWidget>
class DownloadWidget;
class MapWidget;
class MarkerList;
class MainWidget : public QWidget
{
Q_OBJECT
public:
MainWidget(QWidget *parent = 0);
~MainWidget();
@ -42,11 +42,13 @@ private slots:
void centerOnMarker(int row);
void removeMarker(int row);
void markerRenamed(int index, const QString &name);
void downloadArea(int level, const QRectF &rect);
private:
QStackedWidget *m_stack;
MapWidget *m_map;
MarkerList *m_markerList;
DownloadWidget *m_dlWidget;
};

34
mapwidget.cpp
View File

@ -239,7 +239,7 @@ void MapWidget::keyPressEvent(QKeyEvent *event)
switch (event->key()) {
case Qt::Key_Tab:
{
emit switchView();
emit showMarkerList();
break;
}
case Qt::Key_M:
@ -303,6 +303,11 @@ void MapWidget::keyPressEvent(QKeyEvent *event)
reloadPixmaps();
break;
}
case Qt::Key_D:
{
emit downloadArea(m_level, geoRect());
break;
}
case Qt::Key_U:
{
m_infos = !m_infos;
@ -731,7 +736,22 @@ void MapWidget::centerOnGeoPos(qreal lon, qreal lat)
updatePos();
}
QPointF MapWidget::geoPos()
QRectF MapWidget::geoRect() const
{
qreal partX = (-m_pos.x()) / 256.0;
qreal partY = (height() - m_pos.y()) / 256.0;
qreal minLon = tilex2lon(m_indexX + partX, m_level);
qreal minLat = tiley2lat(m_indexY + partY, m_level);
partX = (width() - m_pos.x()) / 256.0;
partY = (-m_pos.y()) / 256.0;
qreal maxLon = tilex2lon(m_indexX + partX, m_level);
qreal maxLat = tiley2lat(m_indexY + partY, m_level);
return QRectF(QPointF(minLon, minLat), QPointF(maxLon, maxLat));
}
QPointF MapWidget::geoPos() const
{
qreal w = width() / 2.0;
qreal h = height() / 2.0;
@ -743,7 +763,7 @@ QPointF MapWidget::geoPos()
return QPointF(lon, lat);
}
QPoint MapWidget::geo2screen(qreal lon, qreal lat)
QPoint MapWidget::geo2screen(qreal lon, qreal lat) const
{
qreal tx = lon2tilex(lon, m_level);
qreal ty = lat2tiley(lat, m_level);
@ -754,22 +774,22 @@ QPoint MapWidget::geo2screen(qreal lon, qreal lat)
return QPoint(x, y);
}
qreal MapWidget::lon2tilex(qreal lon, int z)
qreal MapWidget::lon2tilex(qreal lon, int z) const
{
return (lon + 180.0) / 360.0 * pow(2.0, z);
}
qreal MapWidget::lat2tiley(qreal lat, int z)
qreal MapWidget::lat2tiley(qreal lat, int z) const
{
return (1.0 - log(tan(lat * M_PI/180.0) + 1.0 / cos(lat * M_PI/180.0)) / M_PI) / 2.0 * pow(2.0, z);
}
qreal MapWidget::tilex2lon(qreal x, int z)
qreal MapWidget::tilex2lon(qreal x, int z) const
{
return x / pow(2.0, z) * 360.0 - 180;
}
qreal MapWidget::tiley2lat(qreal y, int z)
qreal MapWidget::tiley2lat(qreal y, int z) const
{
qreal n = M_PI - 2.0 * M_PI * y / pow(2.0, z);
return 180.0 / M_PI * atan(0.5 * (exp(n) - exp(-n)));

17
mapwidget.h
View File

@ -27,7 +27,6 @@
class MapWidget : public QWidget
{
Q_OBJECT
public:
MapWidget(QWidget *parent = 0);
~MapWidget();
@ -40,7 +39,8 @@ public slots:
signals:
void markerAdded(const QString &name);
void switchView();
void showMarkerList();
void downloadArea(int level, const QRectF &rect);
protected:
virtual void resizeEvent(QResizeEvent *event);
@ -65,12 +65,13 @@ private:
void downloadTile(int x, int y, int level);
void changeZoomLevel(int diff);
void centerOnGeoPos(qreal lon, qreal lat);
QPointF geoPos();
QPoint geo2screen(qreal lon, qreal lat);
qreal lon2tilex(qreal lon, int z);
qreal lat2tiley(qreal lat, int z);
qreal tilex2lon(qreal x, int z);
qreal tiley2lat(qreal y, int z);
QRectF geoRect() const;
QPointF geoPos() const;
QPoint geo2screen(qreal lon, qreal lat) const;
qreal lon2tilex(qreal lon, int z) const;
qreal lat2tiley(qreal lat, int z) const;
qreal tilex2lon(qreal x, int z) const;
qreal tiley2lat(qreal y, int z) const;
bool m_usage, m_infos, m_zoomable;
QString m_baseName;

3
markerlist.h
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@ -26,7 +26,6 @@
class MarkerList : public QWidget
{
Q_OBJECT
public:
MarkerList(QWidget *parent = 0);
~MarkerList();
@ -51,4 +50,4 @@ private:
};
#endif // MAINWIDGET_H
#endif // MARKERLIST_H

2
nanomap.pro
View File

@ -7,9 +7,11 @@ SOURCES += main.cpp \
mainwidget.cpp \
mapwidget.cpp \
markerlist.cpp \
downloadwidget.cpp \
gpsclient.cpp
HEADERS += mainwidget.h \
mapwidget.h \
markerlist.h \
downloadwidget.h \
gpsclient.h