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/*
Copyright 2010 Christian Vetter veaac.fdirct@gmail.com
This file is part of MoNav.
MoNav 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 3 of the License, or
(at your option) any later version.
MoNav 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 MoNav. If not, see <http://www.gnu.org/licenses/>.
*/
#include "utils/qthelpers.h"
#include <QNetworkReply>
#include <QtDebug>
#include <QDesktopServices>
#include <QFile>
#include "osmrendererclient.h"
#include "osmrsettingsdialog.h"
OSMRendererClient::OSMRendererClient()
{
network = NULL;
diskCache = NULL;
}
OSMRendererClient::~OSMRendererClient()
{
unload();
}
void OSMRendererClient::unload()
{
if ( network != NULL )
delete network;
network = NULL;
}
QString OSMRendererClient::GetName()
{
return "OSM Renderer";
}
bool OSMRendererClient::IsCompatible( int fileFormatVersion )
{
if ( fileFormatVersion == 1 )
return true;
return false;
}
void OSMRendererClient::advancedSettingsChanged()
{
assert( m_advancedSettings != NULL );
OSMRSettingsDialog* dialog = qobject_cast< OSMRSettingsDialog* >( m_advancedSettings );
if ( dialog == NULL )
return;
OSMRSettingsDialog::Settings settings;
dialog->getSettings( &settings );
if ( m_server != settings.tileURL ) {
m_cache.clear();
emit changed();
}
m_server = settings.tileURL;
}
bool OSMRendererClient::load()
{
if ( m_advancedSettings == NULL )
m_advancedSettings = new OSMRSettingsDialog();
advancedSettingsChanged();
network = new QNetworkAccessManager( this );
diskCache = new QNetworkDiskCache( this );
QString cacheDir = QDesktopServices::storageLocation( QDesktopServices::CacheLocation );
if ( cacheDir == "" ) {
cacheDir = QDesktopServices::storageLocation( QDesktopServices::TempLocation );
QDir dir( cacheDir );
dir.mkdir( "osmrenderer" );
dir.cd( "osmrenderer" );
cacheDir = dir.path();
}
qDebug() << "set disk cache to: " << cacheDir;
diskCache->setCacheDirectory( cacheDir );
network->setCache( diskCache );
connect( network, SIGNAL(finished(QNetworkReply*)), this, SLOT(finished(QNetworkReply*)) );
tileSize = 256;
QFile settingsFile( fileInDirectory( m_directory, "OSM Renderer" ) + "_settings" );
if ( !openQFile( &settingsFile, QIODevice::ReadOnly ) )
return false;
while ( true ) {
int zoomLevel;
if ( settingsFile.read( ( char* ) &zoomLevel, sizeof( zoomLevel ) ) != sizeof( zoomLevel ) )
break;
m_zoomLevels.push_back( zoomLevel );
}
return true;
}
void OSMRendererClient::finished( QNetworkReply* reply ) {
long long id = reply->request().attribute( QNetworkRequest::User ).toLongLong();
if ( reply->error() ) {
m_cache.remove( id );
qDebug() << "failed to get: " << reply->url();
return;
}
QImage image;
if ( !image.load( reply, "PNG" ) ) {
m_cache.remove( id );
qDebug() << "failed to load image: " << id;
return;
}
QPixmap* tile = new QPixmap( QPixmap::fromImage( image ) );
m_cache.insert( id, tile , tileSize * tileSize * tile->depth() / 8 );
reply->deleteLater();
emit changed();
}
bool OSMRendererClient::loadTile( int x, int y, int zoom, int /*magnification*/, QPixmap** tile )
{
long long id = tileID( x, y, zoom );
//QString path = "http://tile.openstreetmap.org/%1/%2/%3.png";
QUrl url = QUrl( m_server.arg( zoom ).arg( x ).arg( y ) );
QIODevice* cacheItem = diskCache->data( url );
if ( cacheItem != NULL ) {
QImage image;
if ( !image.load( cacheItem, 0 ) ) {
m_cache.remove( id );
qDebug() << "failed to load image from cache: " << id;
return false;
}
*tile = new QPixmap( QPixmap::fromImage( image ) );
delete cacheItem;
return true;
}
QNetworkRequest request;
request.setUrl( url );
request.setRawHeader( "User-Agent", "MoNav OSM Renderer 1.0" );
request.setAttribute( QNetworkRequest::User, QVariant( id ) );
request.setAttribute( QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache );
request.setAttribute( QNetworkRequest::HttpPipeliningAllowedAttribute, true );
network->get( request );
return false;
}
Q_EXPORT_PLUGIN2( osmrendererclient, OSMRendererClient )
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