void QgsMapCanvasTracer::configure()
{
setCrsTransformEnabled( mCanvas->mapSettings().hasCrsTransformEnabled() );
setDestinationCrs( mCanvas->mapSettings().destinationCrs() );
setExtent( mCanvas->extent() );
QList<QgsVectorLayer*> layers;
QStringList visibleLayerIds = mCanvas->mapSettings().layers();
switch ( mCanvas->snappingUtils()->snapToMapMode() )
{
default:
case QgsSnappingUtils::SnapCurrentLayer:
{
QgsVectorLayer* vl = qobject_cast<QgsVectorLayer*>( mCanvas->currentLayer() );
if ( vl && visibleLayerIds.contains( vl->id() ) )
layers << vl;
}
break;
case QgsSnappingUtils::SnapAllLayers:
Q_FOREACH ( const QString& layerId, visibleLayerIds )
{
QgsVectorLayer* vl = qobject_cast<QgsVectorLayer*>( QgsMapLayerRegistry::instance()->mapLayer( layerId ) );
if ( vl )
layers << vl;
}
break;
case QgsSnappingUtils::SnapAdvanced:
Q_FOREACH ( const QgsSnappingUtils::LayerConfig& cfg, mCanvas->snappingUtils()->layers() )
{
if ( visibleLayerIds.contains( cfg.layer->id() ) )
layers << cfg.layer;
}
break;
}
void QgsMapSettings::readXML( QDomNode& theNode )
{
// set units
QDomNode mapUnitsNode = theNode.namedItem( "units" );
QGis::UnitType units = QgsXmlUtils::readMapUnits( mapUnitsNode.toElement() );
setMapUnits( units );
// set projections flag
QDomNode projNode = theNode.namedItem( "projections" );
setCrsTransformEnabled( projNode.toElement().text().toInt() );
// set destination CRS
QgsCoordinateReferenceSystem srs;
QDomNode srsNode = theNode.namedItem( "destinationsrs" );
srs.readXML( srsNode );
setDestinationCrs( srs );
// set extent
QDomNode extentNode = theNode.namedItem( "extent" );
QgsRectangle aoi = QgsXmlUtils::readRectangle( extentNode.toElement() );
setExtent( aoi );
// set rotation
QDomNode rotationNode = theNode.namedItem( "rotation" );
QString rotationVal = rotationNode.toElement().text();
if ( ! rotationVal.isEmpty() )
{
double rot = rotationVal.toDouble();
setRotation( rot );
}
//render map tile
QDomElement renderMapTileElem = theNode.firstChildElement( "rendermaptile" );
if ( !renderMapTileElem.isNull() )
{
setFlag( QgsMapSettings::RenderMapTile, renderMapTileElem.text() == "1" ? true : false );
}
mDatumTransformStore.readXML( theNode );
}
void QgsMapCanvas::readProject( const QDomDocument & doc )
{
QDomNodeList nodes = doc.elementsByTagName( "mapcanvas" );
if ( nodes.count() )
{
QDomNode node = nodes.item( 0 );
QgsMapSettings tmpSettings;
tmpSettings.readXML( node );
setMapUnits( tmpSettings.mapUnits() );
setCrsTransformEnabled( tmpSettings.hasCrsTransformEnabled() );
setDestinationCrs( tmpSettings.destinationCrs() );
setExtent( tmpSettings.extent() );
setRotation( tmpSettings.rotation() );
mSettings.datumTransformStore() = tmpSettings.datumTransformStore();
clearExtentHistory(); // clear the extent history on project load
}
else
{
QgsDebugMsg( "Couldn't read mapcanvas information from project" );
}
}
