void QgsMapSettings::writeXML( QDomNode& theNode, QDomDocument& theDoc )
{
// units
theNode.appendChild( QgsXmlUtils::writeMapUnits( mapUnits(), theDoc ) );
// Write current view extents
theNode.appendChild( QgsXmlUtils::writeRectangle( extent(), theDoc ) );
// Write current view rotation
QDomElement rotNode = theDoc.createElement( "rotation" );
rotNode.appendChild(
theDoc.createTextNode( qgsDoubleToString( rotation() ) )
);
theNode.appendChild( rotNode );
// projections enabled
QDomElement projNode = theDoc.createElement( "projections" );
projNode.appendChild( theDoc.createTextNode( QString::number( hasCrsTransformEnabled() ) ) );
theNode.appendChild( projNode );
// destination CRS
QDomElement srsNode = theDoc.createElement( "destinationsrs" );
theNode.appendChild( srsNode );
destinationCrs().writeXML( srsNode, theDoc );
//render map tile
QDomElement renderMapTileElem = theDoc.createElement( "rendermaptile" );
QDomText renderMapTileText = theDoc.createTextNode( testFlag( QgsMapSettings::RenderMapTile ) ? "1" : "0" );
renderMapTileElem.appendChild( renderMapTileText );
theNode.appendChild( renderMapTileElem );
mDatumTransformStore.writeXML( theNode, theDoc );
}
QgsRectangle QgsMapSettings::computeExtentForScale( const QgsPointXY &point, double scale, const QgsCoordinateReferenceSystem &sourceCrs ) const
{
QgsPointXY center = QgsCoordinateTransform( sourceCrs, destinationCrs(), mTransformContext ).transform( point );
// Output width in inches
double outWIn = outputSize().width() / double( outputDpi() );
// Desired visible width (honouring scale)
double scaledWIn = outWIn * scale;
if ( mapUnits() == QgsUnitTypes::DistanceDegrees )
{
// Start with an 1x1 extent around the center
QgsRectangle ext( center.x() - 0.5, center.y() - 0.5, center.x() + 0.5, center.y() + 0.5 );
// Get scale at extent, and then scale extent to the desired scale
double testScale = mScaleCalculator.calculate( ext, outputSize().width() );
ext.scale( scale / testScale );
return ext;
}
// Conversion from inches to mapUnits
double conversionFactor = 12 * QgsUnitTypes::fromUnitToUnitFactor( QgsUnitTypes::DistanceFeet, mapUnits() );
double delta = 0.5 * scaledWIn * conversionFactor;
return QgsRectangle( center.x() - delta, center.y() - delta, center.x() + delta, center.y() + delta );
}
void QgsMapSettings::writeXml( QDomNode &node, QDomDocument &doc )
{
// units
node.appendChild( QgsXmlUtils::writeMapUnits( mapUnits(), doc ) );
// Write current view extents
node.appendChild( QgsXmlUtils::writeRectangle( extent(), doc ) );
// Write current view rotation
QDomElement rotNode = doc.createElement( QStringLiteral( "rotation" ) );
rotNode.appendChild(
doc.createTextNode( qgsDoubleToString( rotation() ) )
);
node.appendChild( rotNode );
// destination CRS
if ( mDestCRS.isValid() )
{
QDomElement srsNode = doc.createElement( QStringLiteral( "destinationsrs" ) );
node.appendChild( srsNode );
mDestCRS.writeXml( srsNode, doc );
}
//render map tile
QDomElement renderMapTileElem = doc.createElement( QStringLiteral( "rendermaptile" ) );
QDomText renderMapTileText = doc.createTextNode( testFlag( QgsMapSettings::RenderMapTile ) ? "1" : "0" );
renderMapTileElem.appendChild( renderMapTileText );
node.appendChild( renderMapTileElem );
}
void QgsCoordinateReferenceSystem::debugPrint()
{
QgsDebugMsg( "***SpatialRefSystem***" );
QgsDebugMsg( "* Valid : " + ( mIsValidFlag ? QString( "true" ) : QString( "false" ) ) );
QgsDebugMsg( "* SrsId : " + QString::number( mSrsId ) );
QgsDebugMsg( "* Proj4 : " + toProj4() );
QgsDebugMsg( "* WKT : " + toWkt() );
QgsDebugMsg( "* Desc. : " + mDescription );
if ( mapUnits() == QGis::Meters )
{
QgsDebugMsg( "* Units : meters" );
}
else if ( mapUnits() == QGis::Feet )
{
QgsDebugMsg( "* Units : feet" );
}
else if ( mapUnits() == QGis::Degrees )
{
QgsDebugMsg( "* Units : degrees" );
}
}
