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qgsconfigparser.cpp
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qgsconfigparser.cpp
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/***************************************************************************
qgsconfigparser.cpp
-------------------
begin : May 26, 2010
copyright : (C) 2010 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 "qgsconfigparser.h"
#include "qgsapplication.h"
#include "qgscomposermap.h"
#include "qgscomposition.h"
#include "qgsrasterlayer.h"
#include "qgsvectorlayer.h"
#include <sqlite3.h>
QgsConfigParser::QgsConfigParser()
: mFallbackParser( 0 )
, mScaleDenominator( 0 )
, mOutputUnits( QgsMapRenderer::Millimeters )
{
setDefaultLegendSettings();
}
QgsConfigParser::~QgsConfigParser()
{
//remove the external GML datasets
for ( QMap<QString, QDomDocument*>::iterator it = mExternalGMLDatasets.begin(); it != mExternalGMLDatasets.end(); ++it )
{
delete it.value();
}
}
void QgsConfigParser::setDefaultLegendSettings()
{
mLegendBoxSpace = 2;
mLegendLayerSpace = 3;
mLegendSymbolSpace = 2;
mLegendIconLabelSpace = 2;
mLegendSymbolWidth = 7;
mLegendSymbolHeight = 4;
}
void QgsConfigParser::setFallbackParser( QgsConfigParser* p )
{
if ( !p )
{
return;
}
delete mFallbackParser;
mFallbackParser = p;
}
void QgsConfigParser::addExternalGMLData( const QString& layerName, QDomDocument* gmlDoc )
{
mExternalGMLDatasets.insert( layerName, gmlDoc );
}
void QgsConfigParser::appendExGeographicBoundingBox( QDomElement& layerElem,
QDomDocument& doc,
const QgsRectangle& layerExtent,
const QgsCoordinateReferenceSystem& layerCRS ) const
{
if ( layerElem.isNull() )
{
return;
}
QgsCoordinateReferenceSystem wgs84;
wgs84.createFromEpsg( 4326 );
//Ex_GeographicBoundingBox
//transform the layers native CRS into WGS84
QgsCoordinateTransform exGeoTransform( layerCRS, wgs84 );
QgsRectangle wgs84BoundingRect = exGeoTransform.transformBoundingBox( layerExtent );
QDomElement ExGeoBBoxElement = doc.createElement( "EX_GeographicBoundingBox" );
QDomElement wBoundLongitudeElement = doc.createElement( "westBoundLongitude" );
QDomText wBoundLongitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.xMinimum() ) );
wBoundLongitudeElement.appendChild( wBoundLongitudeText );
ExGeoBBoxElement.appendChild( wBoundLongitudeElement );
QDomElement eBoundLongitudeElement = doc.createElement( "eastBoundLongitude" );
QDomText eBoundLongitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.xMaximum() ) );
eBoundLongitudeElement.appendChild( eBoundLongitudeText );
ExGeoBBoxElement.appendChild( eBoundLongitudeElement );
QDomElement sBoundLatitudeElement = doc.createElement( "southBoundLatitude" );
QDomText sBoundLatitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.yMinimum() ) );
sBoundLatitudeElement.appendChild( sBoundLatitudeText );
ExGeoBBoxElement.appendChild( sBoundLatitudeElement );
QDomElement nBoundLatitudeElement = doc.createElement( "northBoundLatitude" );
QDomText nBoundLatitudeText = doc.createTextNode( QString::number( wgs84BoundingRect.yMaximum() ) );
nBoundLatitudeElement.appendChild( nBoundLatitudeText );
ExGeoBBoxElement.appendChild( nBoundLatitudeElement );
layerElem.appendChild( ExGeoBBoxElement );
//BoundingBox element
QDomElement bBoxElement = doc.createElement( "BoundingBox" );
if ( layerCRS.isValid() )
{
bBoxElement.setAttribute( "CRS", "EPSG:" + QString::number( layerCRS.epsg() ) );
}
bBoxElement.setAttribute( "minx", QString::number( layerExtent.xMinimum() ) );
bBoxElement.setAttribute( "miny", QString::number( layerExtent.yMinimum() ) );
bBoxElement.setAttribute( "maxx", QString::number( layerExtent.xMaximum() ) );
bBoxElement.setAttribute( "maxy", QString::number( layerExtent.yMaximum() ) );
layerElem.appendChild( bBoxElement );
}
QList<int> QgsConfigParser::createCRSListForLayer( QgsMapLayer* theMapLayer ) const
{
QList<int> epsgNumbers;
QgsVectorLayer* theVectorLayer = dynamic_cast<QgsVectorLayer*>( theMapLayer );
if ( theVectorLayer ) //append the source SRS. In future, all systems supported by proj4 should be appended
{
QString myDatabaseFileName = QgsApplication::srsDbFilePath();
sqlite3 *myDatabase;
const char *myTail;
sqlite3_stmt *myPreparedStatement;
int myResult;
//check the db is available
myResult = sqlite3_open( myDatabaseFileName.toLocal8Bit().data(), &myDatabase );
if ( myResult )
{
//if the database cannot be opened, add at least the epsg number of the source coordinate system
epsgNumbers.push_back( theMapLayer->srs().epsg() );
return epsgNumbers;
};
QString mySql = "select auth_id from tbl_srs where auth_name='EPSG' ";
myResult = sqlite3_prepare( myDatabase, mySql.toUtf8(), mySql.length(), &myPreparedStatement, &myTail );
if ( myResult == SQLITE_OK )
{
while ( sqlite3_step( myPreparedStatement ) == SQLITE_ROW )
{
epsgNumbers.push_back( QString::fromUtf8(( char * )sqlite3_column_text( myPreparedStatement, 0 ) ).toLong() );
}
}
sqlite3_finalize( myPreparedStatement );
sqlite3_close( myDatabase );
}
else //rasters cannot be reprojected. Use the epsg number of the layers native CRS
{
int rasterEpsg = theMapLayer->srs().epsg();
epsgNumbers.push_back( rasterEpsg );
}
return epsgNumbers;
}
bool QgsConfigParser::exGeographicBoundingBox( const QDomElement& layerElement, QgsRectangle& rect ) const
{
if ( layerElement.isNull() )
{
return false;
}
QDomElement exGeogElem = layerElement.firstChildElement( "EX_GeographicBoundingBox" );
if ( exGeogElem.isNull() )
{
return false;
}
bool ok = true;
//minx
QDomElement westBoundElem = exGeogElem.firstChildElement( "westBoundLongitude" );
if ( westBoundElem.isNull() )
{
return false;
}
double minx = westBoundElem.text().toDouble( &ok );
if ( !ok )
{
return false;
}
//maxx
QDomElement eastBoundElem = exGeogElem.firstChildElement( "eastBoundLongitude" );
if ( eastBoundElem.isNull() )
{
return false;
}
double maxx = eastBoundElem.text().toDouble( &ok );
if ( !ok )
{
return false;
}
//miny
QDomElement southBoundElem = exGeogElem.firstChildElement( "southBoundLatitude" );
if ( southBoundElem.isNull() )
{
return false;
}
double miny = southBoundElem.text().toDouble( &ok );
if ( !ok )
{
return false;
}
//maxy
QDomElement northBoundElem = exGeogElem.firstChildElement( "northBoundLatitude" );
if ( northBoundElem.isNull() )
{
return false;
}
double maxy = northBoundElem.text().toDouble( &ok );
if ( !ok )
{
return false;
}
rect.setXMinimum( minx );
rect.setXMaximum( maxx );
rect.setYMinimum( miny );
rect.setYMaximum( maxy );
return true;
}
bool QgsConfigParser::crsSetForLayer( const QDomElement& layerElement, QSet<int>& crsSet ) const
{
if ( layerElement.isNull() )
{
return false;
}
crsSet.clear();
bool intConversionOk;
QDomNodeList crsNodeList = layerElement.elementsByTagName( "CRS" );
for ( int i = 0; i < crsNodeList.size(); ++i )
{
int epsg = crsNodeList.at( i ).toElement().text().remove( 0, 5 ).toInt( &intConversionOk );
if ( intConversionOk )
{
crsSet.insert( epsg );
}
}
return true;
}
void QgsConfigParser::appendCRSElementsToLayer( QDomElement& layerElement, QDomDocument& doc, const QList<int>& crsList ) const
{
if ( layerElement.isNull() )
{
return;
}
//In case the number of advertised CRS is constrained
QSet<int> epsgSet = supportedOutputCrsSet();
QList<int>::const_iterator crsIt = crsList.constBegin();
for ( ; crsIt != crsList.constEnd(); ++crsIt )
{
if ( !epsgSet.isEmpty() && !epsgSet.contains( *crsIt ) ) //consider epsg output constraint
{
continue;
}
QDomElement crsElement = doc.createElement( "CRS" );
QDomText epsgText = doc.createTextNode( "EPSG:" + QString::number( *crsIt ) );
crsElement.appendChild( epsgText );
layerElement.appendChild( crsElement );
}
}
QgsComposition* QgsConfigParser::createPrintComposition( const QString& composerTemplate, QgsMapRenderer* mapRenderer, const QMap< QString, QString >& parameterMap ) const
{
QList<QgsComposerMap*> composerMaps;
QList<QgsComposerLabel*> composerLabels;
QgsComposition* c = initComposition( composerTemplate, mapRenderer, composerMaps, composerLabels );
if ( !c )
{
return 0;
}
QMap< QString, QString >::const_iterator dpiIt = parameterMap.find( "DPI" );
if ( dpiIt != parameterMap.constEnd() )
{
c->setPrintResolution( dpiIt.value().toInt() );
}
//replace composer map parameters
QList<QgsComposerMap*>::iterator mapIt = composerMaps.begin();
QgsComposerMap* currentMap = 0;
for ( ; mapIt != composerMaps.end(); ++mapIt )
{
currentMap = *mapIt;
if ( !currentMap )
{
continue;
}
//search composer map title in parameter map-> string
QMap< QString, QString >::const_iterator titleIt = parameterMap.find( "MAP" + QString::number( currentMap->id() ) );
if ( titleIt == parameterMap.constEnd() )
{
continue;
}
QString replaceString = titleIt.value();
QStringList replacementList = replaceString.split( "/" );
//get map extent from string
if ( replacementList.size() > 0 )
{
QStringList coordList = replacementList.at( 0 ).split( "," );
if ( coordList.size() > 3 )
{
bool xMinOk, yMinOk, xMaxOk, yMaxOk;
double xmin = coordList.at( 0 ).toDouble( &xMinOk );
double ymin = coordList.at( 1 ).toDouble( &yMinOk );
double xmax = coordList.at( 2 ).toDouble( &xMaxOk );
double ymax = coordList.at( 3 ).toDouble( &yMaxOk );
if ( xMinOk && yMinOk && xMaxOk && yMaxOk )
{
currentMap->setNewExtent( QgsRectangle( xmin, ymin, xmax, ymax ) );
}
}
}
//get rotation from string
if ( replacementList.size() > 1 )
{
bool rotationOk;
double rotation = replacementList.at( 1 ).toDouble( &rotationOk );
if ( rotationOk )
{
currentMap->setMapRotation( rotation );
}
}
//get layer list from string
if ( replacementList.size() > 2 )
{
QStringList layerSet;
QStringList wmsLayerList = replacementList.at( 2 ).split( "," );
QStringList wmsStyleList;
if ( replacementList.size() > 3 )
{
wmsStyleList = replacementList.at( 3 ).split( "," );
}
for ( int i = 0; i < wmsLayerList.size(); ++i )
{
QString styleName;
if ( wmsStyleList.size() > i )
{
styleName = wmsStyleList.at( i );
}
QList<QgsMapLayer*> layerList = mapLayerFromStyle( wmsLayerList.at( i ), styleName );
QList<QgsMapLayer*>::const_iterator mapIdIt = layerList.constBegin();
for ( ; mapIdIt != layerList.constEnd(); ++mapIdIt )
{
if ( *mapIdIt )
{
layerSet.push_back(( *mapIdIt )->getLayerID() );
}
}
}
currentMap->setLayerSet( layerSet );
currentMap->setKeepLayerSet( true );
}
}
//replace composer label text
return c; //soon...
}