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qgsxmldata.cpp
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qgsxmldata.cpp
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/***************************************************************************
qgsxmldata.cpp - description
------------------------------
begin : June 2013
copyright : (C) 2013 by Marco Hugentobler
email : marco dot hugentobler at sourcepole dot ch
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "qgsxmldata.h"
#include "qgsmessagelog.h"
#include "qgsnetworkaccessmanager.h"
#include <QApplication>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QProgressDialog>
QgsXMLData::QgsXMLData( const QString& url ): mUrl( url ), mFinished( false )
{
}
QgsXMLData::~QgsXMLData()
{
}
int QgsXMLData::getXMLData( QProgressDialog* progress )
{
XML_Parser p = XML_ParserCreateNS( NULL, XML_NS_SEPARATOR );
XML_SetUserData( p, this );
XML_SetElementHandler( p, QgsXMLData::start, QgsXMLData::end );
XML_SetCharacterDataHandler( p, QgsXMLData::chars );
QUrl url = QUrl::fromEncoded( mUrl.toLocal8Bit() ); //( mUrl );
QNetworkRequest request( url );
QNetworkReply* reply = QgsNetworkAccessManager::instance()->get( request );
connect( reply, SIGNAL( finished() ), this, SLOT( setFinished() ) );
connect( reply, SIGNAL( downloadProgress( qint64, qint64 ) ), this, SLOT( handleProgressEvent( qint64, qint64 ) ) );
if ( progress )
{
progress->setWindowModality( Qt::ApplicationModal );
connect( this, SIGNAL( dataReadProgress( int ) ), progress, SLOT( setValue( int ) ) );
connect( this, SIGNAL( totalStepsUpdate( int ) ) , progress, SLOT( setMaximum( int ) ) );
connect( progress, SIGNAL( canceled() ), this, SLOT( setFinished() ) );
progress->show();
}
//show loading progress in qgis main window (if it exists)
QWidget* mainWindow = 0;
QWidgetList topLevelWidgets = qApp->topLevelWidgets();
for ( QWidgetList::iterator it = topLevelWidgets.begin(); it != topLevelWidgets.end(); ++it )
{
if (( *it )->objectName() == "QgisApp" )
{
mainWindow = *it;
break;
}
}
if ( mainWindow )
{
QObject::connect( this, SIGNAL( progressMessage( QString ) ), mainWindow, SLOT( showStatusMessage( QString ) ) );
}
int atEnd = 0;
while ( !atEnd )
{
if ( mFinished )
{
atEnd = 1;
}
QByteArray readData = reply->readAll();
//debug
if ( readData.size() > 0 )
{
qWarning( QString( readData ).toLocal8Bit().data() );
}
if ( readData.size() > 0 )
{
if ( XML_Parse( p, readData.constData(), readData.size(), atEnd ) == 0 )
{
XML_Error errorCode = XML_GetErrorCode( p );
QString errorString = QObject::tr( "Error: %1 on line %2, column %3" )
.arg( XML_ErrorString( errorCode ) )
.arg( XML_GetCurrentLineNumber( p ) )
.arg( XML_GetCurrentColumnNumber( p ) );
QgsMessageLog::logMessage( errorString, QObject::tr( "SOS" ) );
}
}
QCoreApplication::processEvents();
}
if ( mainWindow )
{
QObject::disconnect( this, SIGNAL( progressMessage( QString ) ), mainWindow, SLOT( showStatusMessage( QString ) ) );
}
delete reply;
if ( progress )
{
progress->hide();
}
return 0;
}
void QgsXMLData::setFinished()
{
mFinished = true;
}
void QgsXMLData::handleProgressEvent( qint64 progress, qint64 maximum )
{
emit dataReadProgress( progress );
emit totalStepsUpdate( maximum );
emit progressMessage( QString( "Received %1 bytes from %2" ).arg( progress ).arg( maximum ) );
}