void QgsGeometryValidator::checkRingIntersections(
int p0, int i0, const QgsPolylineXY &ring0,
int p1, int i1, const QgsPolylineXY &ring1 )
{
for ( int i = 0; !mStop && i < ring0.size() - 1; i++ )
{
QgsVector v = ring0[i + 1] - ring0[i];
for ( int j = 0; !mStop && j < ring1.size() - 1; j++ )
{
QgsVector w = ring1[j + 1] - ring1[j];
QgsPointXY s;
if ( intersectLines( ring0[i], v, ring1[j], w, s ) )
{
double d = -distLine2Point( ring0[i], v.perpVector(), s );
if ( d >= 0 && d <= v.length() )
{
d = -distLine2Point( ring1[j], w.perpVector(), s );
if ( d > 0 && d < w.length() &&
ring0[i + 1] != ring1[j + 1] && ring0[i + 1] != ring1[j] &&
ring0[i + 0] != ring1[j + 1] && ring0[i + 0] != ring1[j] )
{
QString msg = QObject::tr( "segment %1 of ring %2 of polygon %3 intersects segment %4 of ring %5 of polygon %6 at %7" )
.arg( i0 ).arg( i ).arg( p0 )
.arg( i1 ).arg( j ).arg( p1 )
.arg( s.toString() );
QgsDebugMsg( msg );
emit errorFound( QgsGeometry::Error( msg, s ) );
mErrorCount++;
}
}
}
}
}
}
QString ProjectorData::cpToString()
{
QString myString;
for ( int i = 0; i < mCPRows; i++ )
{
if ( i > 0 )
myString += '\n';
for ( int j = 0; j < mCPCols; j++ )
{
if ( j > 0 )
myString += QLatin1String( " " );
QgsPointXY myPoint = mCPMatrix[i][j];
if ( mCPLegalMatrix[i][j] )
{
myString += myPoint.toString();
}
else
{
myString += QLatin1String( "(-,-)" );
}
}
}
return myString;
}
void QgsMapToolDigitizeFeature::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
{
QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mLayer );
if ( !vlayer )
//if no given layer take the current from canvas
vlayer = currentVectorLayer();
if ( !vlayer )
{
notifyNotVectorLayer();
return;
}
QgsWkbTypes::Type layerWKBType = vlayer->wkbType();
QgsVectorDataProvider *provider = vlayer->dataProvider();
if ( !( provider->capabilities() & QgsVectorDataProvider::AddFeatures ) )
{
emit messageEmitted( tr( "The data provider for this layer does not support the addition of features." ), Qgis::Warning );
return;
}
if ( !vlayer->isEditable() )
{
notifyNotEditableLayer();
return;
}
// POINT CAPTURING
if ( mode() == CapturePoint )
{
if ( e->button() != Qt::LeftButton )
return;
//check we only use this tool for point/multipoint layers
if ( vlayer->geometryType() != QgsWkbTypes::PointGeometry && mCheckGeometryType )
{
emit messageEmitted( tr( "Wrong editing tool, cannot apply the 'capture point' tool on this vector layer" ), Qgis::Warning );
return;
}
QgsPointXY savePoint; //point in layer coordinates
try
{
QgsPoint fetchPoint;
int res;
res = fetchLayerPoint( e->mapPointMatch(), fetchPoint );
if ( res == 0 )
{
savePoint = QgsPointXY( fetchPoint.x(), fetchPoint.y() );
}
else
{
savePoint = toLayerCoordinates( vlayer, e->mapPoint() );
}
QgsDebugMsg( "savePoint = " + savePoint.toString() );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
emit messageEmitted( tr( "Cannot transform the point to the layers coordinate system" ), Qgis::Warning );
return;
}
//only do the rest for provider with feature addition support
//note that for the grass provider, this will return false since
//grass provider has its own mechanism of feature addition
if ( provider->capabilities() & QgsVectorDataProvider::AddFeatures )
{
QgsFeature f( vlayer->fields(), 0 );
QgsGeometry g;
if ( layerWKBType == QgsWkbTypes::Point )
{
g = QgsGeometry::fromPointXY( savePoint );
}
else if ( !QgsWkbTypes::isMultiType( layerWKBType ) && QgsWkbTypes::hasZ( layerWKBType ) )
{
g = QgsGeometry( new QgsPoint( QgsWkbTypes::PointZ, savePoint.x(), savePoint.y(), defaultZValue() ) );
}
else if ( QgsWkbTypes::isMultiType( layerWKBType ) && !QgsWkbTypes::hasZ( layerWKBType ) )
{
g = QgsGeometry::fromMultiPointXY( QgsMultiPointXY() << savePoint );
}
else if ( QgsWkbTypes::isMultiType( layerWKBType ) && QgsWkbTypes::hasZ( layerWKBType ) )
{
QgsMultiPoint *mp = new QgsMultiPoint();
mp->addGeometry( new QgsPoint( QgsWkbTypes::PointZ, savePoint.x(), savePoint.y(), defaultZValue() ) );
g = QgsGeometry( mp );
}
else
{
// if layer supports more types (mCheckGeometryType is false)
g = QgsGeometry::fromPointXY( savePoint );
}
if ( QgsWkbTypes::hasM( layerWKBType ) )
{
g.get()->addMValue();
}
f.setGeometry( g );
f.setValid( true );
digitized( f );
// we are done with digitizing for now so instruct advanced digitizing dock to reset its CAD points
cadDockWidget()->clearPoints();
}
}
// LINE AND POLYGON CAPTURING
else if ( mode() == CaptureLine || mode() == CapturePolygon )
{
//check we only use the line tool for line/multiline layers
if ( mode() == CaptureLine && vlayer->geometryType() != QgsWkbTypes::LineGeometry && mCheckGeometryType )
{
emit messageEmitted( tr( "Wrong editing tool, cannot apply the 'capture line' tool on this vector layer" ), Qgis::Warning );
return;
}
//check we only use the polygon tool for polygon/multipolygon layers
if ( mode() == CapturePolygon && vlayer->geometryType() != QgsWkbTypes::PolygonGeometry && mCheckGeometryType )
{
emit messageEmitted( tr( "Wrong editing tool, cannot apply the 'capture polygon' tool on this vector layer" ), Qgis::Warning );
return;
}
//add point to list and to rubber band
if ( e->button() == Qt::LeftButton )
{
int error = addVertex( e->mapPoint(), e->mapPointMatch() );
if ( error == 1 )
{
//current layer is not a vector layer
return;
}
else if ( error == 2 )
{
//problem with coordinate transformation
emit messageEmitted( tr( "Cannot transform the point to the layers coordinate system" ), Qgis::Warning );
return;
}
startCapturing();
}
else if ( e->button() == Qt::RightButton )
{
// End of string
deleteTempRubberBand();
//lines: bail out if there are not at least two vertices
if ( mode() == CaptureLine && size() < 2 )
{
stopCapturing();
return;
}
//polygons: bail out if there are not at least two vertices
if ( mode() == CapturePolygon && size() < 3 )
{
stopCapturing();
return;
}
if ( mode() == CapturePolygon )
{
closePolygon();
}
//create QgsFeature with wkb representation
std::unique_ptr< QgsFeature > f( new QgsFeature( vlayer->fields(), 0 ) );
//does compoundcurve contain circular strings?
//does provider support circular strings?
bool hasCurvedSegments = captureCurve()->hasCurvedSegments();
bool providerSupportsCurvedSegments = vlayer->dataProvider()->capabilities() & QgsVectorDataProvider::CircularGeometries;
QList<QgsPointLocator::Match> snappingMatchesList;
QgsCurve *curveToAdd = nullptr;
if ( hasCurvedSegments && providerSupportsCurvedSegments )
{
curveToAdd = captureCurve()->clone();
}
else
{
curveToAdd = captureCurve()->curveToLine();
snappingMatchesList = snappingMatches();
}
if ( mode() == CaptureLine )
{
QgsGeometry g( curveToAdd );
f->setGeometry( g );
}
else
{
QgsCurvePolygon *poly = nullptr;
if ( hasCurvedSegments && providerSupportsCurvedSegments )
{
poly = new QgsCurvePolygon();
}
else
{
poly = new QgsPolygon();
}
poly->setExteriorRing( curveToAdd );
QgsGeometry g( poly );
f->setGeometry( g );
QgsGeometry featGeom = f->geometry();
int avoidIntersectionsReturn = featGeom.avoidIntersections( QgsProject::instance()->avoidIntersectionsLayers() );
f->setGeometry( featGeom );
if ( avoidIntersectionsReturn == 1 )
{
//not a polygon type. Impossible to get there
}
if ( f->geometry().isEmpty() ) //avoid intersection might have removed the whole geometry
{
emit messageEmitted( tr( "The feature cannot be added because it's geometry collapsed due to intersection avoidance" ), Qgis::Critical );
stopCapturing();
return;
}
}
f->setValid( true );
digitized( *f );
stopCapturing();
}
}
}
QVariantMap QgsShortestPathPointToPointAlgorithm::processAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
loadCommonParams( parameters, context, feedback );
QgsFields fields;
fields.append( QgsField( QStringLiteral( "start" ), QVariant::String ) );
fields.append( QgsField( QStringLiteral( "end" ), QVariant::String ) );
fields.append( QgsField( QStringLiteral( "cost" ), QVariant::Double ) );
QString dest;
std::unique_ptr< QgsFeatureSink > sink( parameterAsSink( parameters, QStringLiteral( "OUTPUT" ), context, dest, fields, QgsWkbTypes::LineString, mNetwork->sourceCrs() ) );
if ( !sink )
throw QgsProcessingException( invalidSinkError( parameters, QStringLiteral( "OUTPUT" ) ) );
QgsPointXY startPoint = parameterAsPoint( parameters, QStringLiteral( "START_POINT" ), context, mNetwork->sourceCrs() );
QgsPointXY endPoint = parameterAsPoint( parameters, QStringLiteral( "END_POINT" ), context, mNetwork->sourceCrs() );
feedback->pushInfo( QObject::tr( "Building graph…" ) );
QVector< QgsPointXY > points;
points << startPoint << endPoint;
QVector< QgsPointXY > snappedPoints;
mDirector->makeGraph( mBuilder.get(), points, snappedPoints, feedback );
feedback->pushInfo( QObject::tr( "Calculating shortest path…" ) );
QgsGraph *graph = mBuilder->graph();
int idxStart = graph->findVertex( snappedPoints[0] );
int idxEnd = graph->findVertex( snappedPoints[1] );
QVector< int > tree;
QVector< double > costs;
QgsGraphAnalyzer::dijkstra( graph, idxStart, 0, &tree, &costs );
if ( tree.at( idxEnd ) == -1 )
{
throw QgsProcessingException( QObject::tr( "There is no route from start point to end point." ) );
}
QVector<QgsPointXY> route;
route.push_front( graph->vertex( idxEnd ).point() );
double cost = costs.at( idxEnd );
while ( idxEnd != idxStart )
{
idxEnd = graph->edge( tree.at( idxEnd ) ).fromVertex();
route.push_front( graph->vertex( idxEnd ).point() );
}
feedback->pushInfo( QObject::tr( "Writing results…" ) );
QgsGeometry geom = QgsGeometry::fromPolylineXY( route );
QgsFeature feat;
feat.setFields( fields );
QgsAttributes attributes;
attributes << startPoint.toString() << endPoint.toString() << cost / mMultiplier;
feat.setGeometry( geom );
feat.setAttributes( attributes );
sink->addFeature( feat, QgsFeatureSink::FastInsert );
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT" ), dest );
outputs.insert( QStringLiteral( "TRAVEL_COST" ), cost / mMultiplier );
return outputs;
}
QVariantMap QgsShortestPathPointToLayerAlgorithm::processAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
loadCommonParams( parameters, context, feedback );
QgsPointXY startPoint = parameterAsPoint( parameters, QStringLiteral( "START_POINT" ), context, mNetwork->sourceCrs() );
std::unique_ptr< QgsFeatureSource > endPoints( parameterAsSource( parameters, QStringLiteral( "END_POINTS" ), context ) );
if ( !endPoints )
throw QgsProcessingException( invalidSourceError( parameters, QStringLiteral( "END_POINTS" ) ) );
QgsFields fields = endPoints->fields();
fields.append( QgsField( QStringLiteral( "start" ), QVariant::String ) );
fields.append( QgsField( QStringLiteral( "end" ), QVariant::String ) );
fields.append( QgsField( QStringLiteral( "cost" ), QVariant::Double ) );
QString dest;
std::unique_ptr< QgsFeatureSink > sink( parameterAsSink( parameters, QStringLiteral( "OUTPUT" ), context, dest, fields, QgsWkbTypes::LineString, mNetwork->sourceCrs() ) );
if ( !sink )
throw QgsProcessingException( invalidSinkError( parameters, QStringLiteral( "OUTPUT" ) ) );
QVector< QgsPointXY > points;
points.push_front( startPoint );
QHash< int, QgsAttributes > sourceAttributes;
loadPoints( endPoints.get(), points, sourceAttributes, context, feedback );
feedback->pushInfo( QObject::tr( "Building graph…" ) );
QVector< QgsPointXY > snappedPoints;
mDirector->makeGraph( mBuilder.get(), points, snappedPoints, feedback );
feedback->pushInfo( QObject::tr( "Calculating shortest paths…" ) );
QgsGraph *graph = mBuilder->graph();
int idxStart = graph->findVertex( snappedPoints[0] );
int idxEnd;
QVector< int > tree;
QVector< double > costs;
QgsGraphAnalyzer::dijkstra( graph, idxStart, 0, &tree, &costs );
QVector<QgsPointXY> route;
double cost;
QgsFeature feat;
feat.setFields( fields );
QgsAttributes attributes;
int step = points.size() > 0 ? 100.0 / points.size() : 1;
for ( int i = 1; i < points.size(); i++ )
{
if ( feedback->isCanceled() )
{
break;
}
idxEnd = graph->findVertex( snappedPoints[i] );
if ( tree.at( idxEnd ) == -1 )
{
feedback->reportError( QObject::tr( "There is no route from start point (%1) to end point (%2)." )
.arg( startPoint.toString(),
points[i].toString() ) );
feat.clearGeometry();
attributes = sourceAttributes.value( i );
attributes.append( QVariant() );
attributes.append( points[i].toString() );
feat.setAttributes( attributes );
sink->addFeature( feat, QgsFeatureSink::FastInsert );
continue;
}
route.clear();
route.push_front( graph->vertex( idxEnd ).point() );
cost = costs.at( idxEnd );
while ( idxEnd != idxStart )
{
idxEnd = graph->edge( tree.at( idxEnd ) ).fromVertex();
route.push_front( graph->vertex( idxEnd ).point() );
}
QgsGeometry geom = QgsGeometry::fromPolylineXY( route );
QgsFeature feat;
feat.setFields( fields );
attributes = sourceAttributes.value( i );
attributes.append( startPoint.toString() );
attributes.append( points[i].toString() );
attributes.append( cost / mMultiplier );
feat.setAttributes( attributes );
feat.setGeometry( geom );
sink->addFeature( feat, QgsFeatureSink::FastInsert );
feedback->setProgress( i * step );
}
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT" ), dest );
return outputs;
}
bool QgsMapRendererJob::reprojectToLayerExtent( const QgsMapLayer *ml, const QgsCoordinateTransform &ct, QgsRectangle &extent, QgsRectangle &r2 )
{
bool split = false;
try
{
#ifdef QGISDEBUG
// QgsLogger::debug<QgsRectangle>("Getting extent of canvas in layers CS. Canvas is ", extent, __FILE__, __FUNCTION__, __LINE__);
#endif
// Split the extent into two if the source CRS is
// geographic and the extent crosses the split in
// geographic coordinates (usually +/- 180 degrees,
// and is assumed to be so here), and draw each
// extent separately.
static const double SPLIT_COORD = 180.0;
if ( ml->crs().isGeographic() )
{
if ( ml->type() == QgsMapLayer::VectorLayer && !ct.destinationCrs().isGeographic() )
{
// if we transform from a projected coordinate system check
// check if transforming back roughly returns the input
// extend - otherwise render the world.
QgsRectangle extent1 = ct.transformBoundingBox( extent, QgsCoordinateTransform::ReverseTransform );
QgsRectangle extent2 = ct.transformBoundingBox( extent1, QgsCoordinateTransform::ForwardTransform );
QgsDebugMsgLevel( QString( "\n0:%1 %2x%3\n1:%4\n2:%5 %6x%7 (w:%8 h:%9)" )
.arg( extent.toString() ).arg( extent.width() ).arg( extent.height() )
.arg( extent1.toString(), extent2.toString() ).arg( extent2.width() ).arg( extent2.height() )
.arg( std::fabs( 1.0 - extent2.width() / extent.width() ) )
.arg( std::fabs( 1.0 - extent2.height() / extent.height() ) )
, 3 );
if ( std::fabs( 1.0 - extent2.width() / extent.width() ) < 0.5 &&
std::fabs( 1.0 - extent2.height() / extent.height() ) < 0.5 )
{
extent = extent1;
}
else
{
extent = QgsRectangle( -180.0, -90.0, 180.0, 90.0 );
}
}
else
{
// Note: ll = lower left point
QgsPointXY ll = ct.transform( extent.xMinimum(), extent.yMinimum(),
QgsCoordinateTransform::ReverseTransform );
// and ur = upper right point
QgsPointXY ur = ct.transform( extent.xMaximum(), extent.yMaximum(),
QgsCoordinateTransform::ReverseTransform );
QgsDebugMsgLevel( QString( "in:%1 (ll:%2 ur:%3)" ).arg( extent.toString(), ll.toString(), ur.toString() ), 4 );
extent = ct.transformBoundingBox( extent, QgsCoordinateTransform::ReverseTransform );
QgsDebugMsgLevel( QString( "out:%1 (w:%2 h:%3)" ).arg( extent.toString() ).arg( extent.width() ).arg( extent.height() ), 4 );
if ( ll.x() > ur.x() )
{
// the coordinates projected in reverse order than what one would expect.
// we are probably looking at an area that includes longitude of 180 degrees.
// we need to take into account coordinates from two intervals: (-180,x1) and (x2,180)
// so let's use (-180,180). This hopefully does not add too much overhead. It is
// more straightforward than rendering with two separate extents and more consistent
// for rendering, labeling and caching as everything is rendered just in one go
extent.setXMinimum( -SPLIT_COORD );
extent.setXMaximum( SPLIT_COORD );
}
}
// TODO: the above rule still does not help if using a projection that covers the whole
// world. E.g. with EPSG:3857 the longitude spectrum -180 to +180 is mapped to approx.
// -2e7 to +2e7. Converting extent from -5e7 to +5e7 is transformed as -90 to +90,
// but in fact the extent should cover the whole world.
}
else // can't cross 180
{
if ( ct.destinationCrs().isGeographic() &&
( extent.xMinimum() <= -180 || extent.xMaximum() >= 180 ||
extent.yMinimum() <= -90 || extent.yMaximum() >= 90 ) )
// Use unlimited rectangle because otherwise we may end up transforming wrong coordinates.
// E.g. longitude -200 to +160 would be understood as +40 to +160 due to periodicity.
// We could try to clamp coords to (-180,180) for lon resp. (-90,90) for lat,
// but this seems like a safer choice.
extent = QgsRectangle( -DBL_MAX, -DBL_MAX, DBL_MAX, DBL_MAX );
else
extent = ct.transformBoundingBox( extent, QgsCoordinateTransform::ReverseTransform );
}
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( "Transform error caught" );
extent = QgsRectangle( -DBL_MAX, -DBL_MAX, DBL_MAX, DBL_MAX );
r2 = QgsRectangle( -DBL_MAX, -DBL_MAX, DBL_MAX, DBL_MAX );
}
return split;
}
bool QgsMapToolIdentify::identifyRasterLayer( QList<IdentifyResult> *results, QgsRasterLayer *layer, QgsPointXY point, const QgsRectangle &viewExtent, double mapUnitsPerPixel )
{
QgsDebugMsg( "point = " + point.toString() );
if ( !layer )
return false;
QgsRasterDataProvider *dprovider = layer->dataProvider();
if ( !dprovider )
return false;
int capabilities = dprovider->capabilities();
if ( !( capabilities & QgsRasterDataProvider::Identify ) )
return false;
QgsPointXY pointInCanvasCrs = point;
try
{
point = toLayerCoordinates( layer, point );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( QString( "coordinate not reprojectable: %1" ).arg( cse.what() ) );
return false;
}
QgsDebugMsg( QString( "point = %1 %2" ).arg( point.x() ).arg( point.y() ) );
if ( !layer->extent().contains( point ) )
return false;
QMap< QString, QString > attributes, derivedAttributes;
QgsRaster::IdentifyFormat format = QgsRasterDataProvider::identifyFormatFromName( layer->customProperty( QStringLiteral( "identify/format" ) ).toString() );
// check if the format is really supported otherwise use first supported format
if ( !( QgsRasterDataProvider::identifyFormatToCapability( format ) & capabilities ) )
{
if ( capabilities & QgsRasterInterface::IdentifyFeature ) format = QgsRaster::IdentifyFormatFeature;
else if ( capabilities & QgsRasterInterface::IdentifyValue ) format = QgsRaster::IdentifyFormatValue;
else if ( capabilities & QgsRasterInterface::IdentifyHtml ) format = QgsRaster::IdentifyFormatHtml;
else if ( capabilities & QgsRasterInterface::IdentifyText ) format = QgsRaster::IdentifyFormatText;
else return false;
}
QgsRasterIdentifyResult identifyResult;
// We can only use current map canvas context (extent, width, height) if layer is not reprojected,
if ( dprovider->crs() != mCanvas->mapSettings().destinationCrs() )
{
// To get some reasonable response for point/line WMS vector layers we must
// use a context with approximately a resolution in layer CRS units
// corresponding to current map canvas resolution (for examplei UMN Mapserver
// in msWMSFeatureInfo() -> msQueryByRect() is using requested pixel
// + TOLERANCE (layer param) for feature selection)
//
QgsRectangle r;
r.setXMinimum( pointInCanvasCrs.x() - mapUnitsPerPixel / 2. );
r.setXMaximum( pointInCanvasCrs.x() + mapUnitsPerPixel / 2. );
r.setYMinimum( pointInCanvasCrs.y() - mapUnitsPerPixel / 2. );
r.setYMaximum( pointInCanvasCrs.y() + mapUnitsPerPixel / 2. );
r = toLayerCoordinates( layer, r ); // will be a bit larger
// Mapserver (6.0.3, for example) does not work with 1x1 pixel box
// but that is fixed (the rect is enlarged) in the WMS provider
identifyResult = dprovider->identify( point, format, r, 1, 1 );
}
else
{
// It would be nice to use the same extent and size which was used for drawing,
// so that WCS can use cache from last draw, unfortunately QgsRasterLayer::draw()
// is doing some tricks with extent and size to align raster to output which
// would be difficult to replicate here.
// Note: cutting the extent may result in slightly different x and y resolutions
// and thus shifted point calculated back in QGIS WMS (using average resolution)
//viewExtent = dprovider->extent().intersect( &viewExtent );
// Width and height are calculated from not projected extent and we hope that
// are similar to source width and height used to reproject layer for drawing.
// TODO: may be very dangerous, because it may result in different resolutions
// in source CRS, and WMS server (QGIS server) calcs wrong coor using average resolution.
int width = std::round( viewExtent.width() / mapUnitsPerPixel );
int height = std::round( viewExtent.height() / mapUnitsPerPixel );
QgsDebugMsg( QString( "viewExtent.width = %1 viewExtent.height = %2" ).arg( viewExtent.width() ).arg( viewExtent.height() ) );
QgsDebugMsg( QString( "width = %1 height = %2" ).arg( width ).arg( height ) );
QgsDebugMsg( QString( "xRes = %1 yRes = %2 mapUnitsPerPixel = %3" ).arg( viewExtent.width() / width ).arg( viewExtent.height() / height ).arg( mapUnitsPerPixel ) );
identifyResult = dprovider->identify( point, format, viewExtent, width, height );
}
derivedAttributes.insert( tr( "(clicked coordinate X)" ), formatXCoordinate( pointInCanvasCrs ) );
derivedAttributes.insert( tr( "(clicked coordinate Y)" ), formatYCoordinate( pointInCanvasCrs ) );
if ( identifyResult.isValid() )
{
QMap<int, QVariant> values = identifyResult.results();
QgsGeometry geometry;
if ( format == QgsRaster::IdentifyFormatValue )
{
Q_FOREACH ( int bandNo, values.keys() )
{
QString valueString;
if ( values.value( bandNo ).isNull() )
{
valueString = tr( "no data" );
}
else
{
QVariant value( values.value( bandNo ) );
// The cast is legit. Quoting QT doc :
// "Although this function is declared as returning QVariant::Type,
// the return value should be interpreted as QMetaType::Type"
if ( static_cast<QMetaType::Type>( value.type() ) == QMetaType::Float )
{
valueString = QgsRasterBlock::printValue( value.toFloat() );
}
else
{
valueString = QgsRasterBlock::printValue( value.toDouble() );
}
}
attributes.insert( dprovider->generateBandName( bandNo ), valueString );
}
QString label = layer->name();
results->append( IdentifyResult( qobject_cast<QgsMapLayer *>( layer ), label, attributes, derivedAttributes ) );
}
bool QgsMapToolIdentify::identifyRasterLayer( QList<IdentifyResult> *results, QgsRasterLayer *layer, QgsPointXY point, const QgsRectangle &viewExtent, double mapUnitsPerPixel )
{
QgsDebugMsg( "point = " + point.toString() );
if ( !layer )
return false;
QgsRasterDataProvider *dprovider = layer->dataProvider();
if ( !dprovider )
return false;
int capabilities = dprovider->capabilities();
if ( !( capabilities & QgsRasterDataProvider::Identify ) )
return false;
QgsPointXY pointInCanvasCrs = point;
try
{
point = toLayerCoordinates( layer, point );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( QString( "coordinate not reprojectable: %1" ).arg( cse.what() ) );
return false;
}
QgsDebugMsg( QString( "point = %1 %2" ).arg( point.x() ).arg( point.y() ) );
if ( !layer->extent().contains( point ) )
return false;
QMap< QString, QString > attributes, derivedAttributes;
QgsRaster::IdentifyFormat format = QgsRasterDataProvider::identifyFormatFromName( layer->customProperty( QStringLiteral( "identify/format" ) ).toString() );
// check if the format is really supported otherwise use first supported format
if ( !( QgsRasterDataProvider::identifyFormatToCapability( format ) & capabilities ) )
{
if ( capabilities & QgsRasterInterface::IdentifyFeature ) format = QgsRaster::IdentifyFormatFeature;
else if ( capabilities & QgsRasterInterface::IdentifyValue ) format = QgsRaster::IdentifyFormatValue;
else if ( capabilities & QgsRasterInterface::IdentifyHtml ) format = QgsRaster::IdentifyFormatHtml;
else if ( capabilities & QgsRasterInterface::IdentifyText ) format = QgsRaster::IdentifyFormatText;
else return false;
}
QgsRasterIdentifyResult identifyResult;
// We can only use current map canvas context (extent, width, height) if layer is not reprojected,
if ( dprovider->crs() != mCanvas->mapSettings().destinationCrs() )
{
// To get some reasonable response for point/line WMS vector layers we must
// use a context with approximately a resolution in layer CRS units
// corresponding to current map canvas resolution (for examplei UMN Mapserver
// in msWMSFeatureInfo() -> msQueryByRect() is using requested pixel
// + TOLERANCE (layer param) for feature selection)
//
QgsRectangle r;
r.setXMinimum( pointInCanvasCrs.x() - mapUnitsPerPixel / 2. );
r.setXMaximum( pointInCanvasCrs.x() + mapUnitsPerPixel / 2. );
r.setYMinimum( pointInCanvasCrs.y() - mapUnitsPerPixel / 2. );
r.setYMaximum( pointInCanvasCrs.y() + mapUnitsPerPixel / 2. );
r = toLayerCoordinates( layer, r ); // will be a bit larger
// Mapserver (6.0.3, for example) does not work with 1x1 pixel box
// but that is fixed (the rect is enlarged) in the WMS provider
identifyResult = dprovider->identify( point, format, r, 1, 1 );
}
else
{
// It would be nice to use the same extent and size which was used for drawing,
// so that WCS can use cache from last draw, unfortunately QgsRasterLayer::draw()
// is doing some tricks with extent and size to align raster to output which
// would be difficult to replicate here.
// Note: cutting the extent may result in slightly different x and y resolutions
// and thus shifted point calculated back in QGIS WMS (using average resolution)
//viewExtent = dprovider->extent().intersect( &viewExtent );
// Width and height are calculated from not projected extent and we hope that
// are similar to source width and height used to reproject layer for drawing.
// TODO: may be very dangerous, because it may result in different resolutions
// in source CRS, and WMS server (QGIS server) calcs wrong coor using average resolution.
int width = std::round( viewExtent.width() / mapUnitsPerPixel );
int height = std::round( viewExtent.height() / mapUnitsPerPixel );
QgsDebugMsg( QString( "viewExtent.width = %1 viewExtent.height = %2" ).arg( viewExtent.width() ).arg( viewExtent.height() ) );
QgsDebugMsg( QString( "width = %1 height = %2" ).arg( width ).arg( height ) );
QgsDebugMsg( QString( "xRes = %1 yRes = %2 mapUnitsPerPixel = %3" ).arg( viewExtent.width() / width ).arg( viewExtent.height() / height ).arg( mapUnitsPerPixel ) );
identifyResult = dprovider->identify( point, format, viewExtent, width, height );
}
derivedAttributes.insert( tr( "(clicked coordinate X)" ), formatXCoordinate( pointInCanvasCrs ) );
derivedAttributes.insert( tr( "(clicked coordinate Y)" ), formatYCoordinate( pointInCanvasCrs ) );
if ( identifyResult.isValid() )
{
QMap<int, QVariant> values = identifyResult.results();
QgsGeometry geometry;
if ( format == QgsRaster::IdentifyFormatValue )
{
for ( auto it = values.constBegin(); it != values.constEnd(); ++it )
{
QString valueString;
if ( it.value().isNull() )
{
valueString = tr( "no data" );
}
else
{
QVariant value( it.value() );
// The cast is legit. Quoting QT doc :
// "Although this function is declared as returning QVariant::Type,
// the return value should be interpreted as QMetaType::Type"
if ( static_cast<QMetaType::Type>( value.type() ) == QMetaType::Float )
{
valueString = QgsRasterBlock::printValue( value.toFloat() );
}
else
{
valueString = QgsRasterBlock::printValue( value.toDouble() );
}
}
attributes.insert( dprovider->generateBandName( it.key() ), valueString );
}
QString label = layer->name();
results->append( IdentifyResult( qobject_cast<QgsMapLayer *>( layer ), label, attributes, derivedAttributes ) );
}
else if ( format == QgsRaster::IdentifyFormatFeature )
{
for ( auto it = values.constBegin(); it != values.constEnd(); ++it )
{
QVariant value = it.value();
if ( value.type() == QVariant::Bool && !value.toBool() )
{
// sublayer not visible or not queryable
continue;
}
if ( value.type() == QVariant::String )
{
// error
// TODO: better error reporting
QString label = layer->subLayers().value( it.key() );
attributes.clear();
attributes.insert( tr( "Error" ), value.toString() );
results->append( IdentifyResult( qobject_cast<QgsMapLayer *>( layer ), label, attributes, derivedAttributes ) );
continue;
}
// list of feature stores for a single sublayer
const QgsFeatureStoreList featureStoreList = it.value().value<QgsFeatureStoreList>();
for ( const QgsFeatureStore &featureStore : featureStoreList )
{
const QgsFeatureList storeFeatures = featureStore.features();
for ( QgsFeature feature : storeFeatures )
{
attributes.clear();
// WMS sublayer and feature type, a sublayer may contain multiple feature types.
// Sublayer name may be the same as layer name and feature type name
// may be the same as sublayer. We try to avoid duplicities in label.
QString sublayer = featureStore.params().value( QStringLiteral( "sublayer" ) ).toString();
QString featureType = featureStore.params().value( QStringLiteral( "featureType" ) ).toString();
// Strip UMN MapServer '_feature'
featureType.remove( QStringLiteral( "_feature" ) );
QStringList labels;
if ( sublayer.compare( layer->name(), Qt::CaseInsensitive ) != 0 )
{
labels << sublayer;
}
if ( featureType.compare( sublayer, Qt::CaseInsensitive ) != 0 || labels.isEmpty() )
{
labels << featureType;
}
QMap< QString, QString > derAttributes = derivedAttributes;
derAttributes.unite( featureDerivedAttributes( &feature, layer ) );
IdentifyResult identifyResult( qobject_cast<QgsMapLayer *>( layer ), labels.join( QStringLiteral( " / " ) ), featureStore.fields(), feature, derAttributes );
identifyResult.mParams.insert( QStringLiteral( "getFeatureInfoUrl" ), featureStore.params().value( QStringLiteral( "getFeatureInfoUrl" ) ) );
results->append( identifyResult );
}
}
}
}
else // text or html
{
QgsDebugMsg( QString( "%1 HTML or text values" ).arg( values.size() ) );
for ( auto it = values.constBegin(); it != values.constEnd(); ++it )
{
QString value = it.value().toString();
attributes.clear();
attributes.insert( QLatin1String( "" ), value );
QString label = layer->subLayers().value( it.key() );
results->append( IdentifyResult( qobject_cast<QgsMapLayer *>( layer ), label, attributes, derivedAttributes ) );
}
}
}
else
{
attributes.clear();
QString value = identifyResult.error().message( QgsErrorMessage::Text );
attributes.insert( tr( "Error" ), value );
QString label = tr( "Identify error" );
results->append( IdentifyResult( qobject_cast<QgsMapLayer *>( layer ), label, attributes, derivedAttributes ) );
}
return true;
}
void QgsGeometryValidator::validatePolyline( int i, QgsPolylineXY line, bool ring )
{
if ( ring )
{
if ( line.size() < 4 )
{
QString msg = QObject::tr( "ring %1 with less than four points" ).arg( i );
QgsDebugMsg( msg );
emit errorFound( QgsGeometry::Error( msg ) );
mErrorCount++;
return;
}
if ( line[0] != line[ line.size() - 1 ] )
{
QString msg = QObject::tr( "ring %1 not closed" ).arg( i );
QgsDebugMsg( msg );
emit errorFound( QgsGeometry::Error( msg ) );
mErrorCount++;
return;
}
}
else if ( line.size() < 2 )
{
QString msg = QObject::tr( "line %1 with less than two points" ).arg( i );
QgsDebugMsg( msg );
emit errorFound( QgsGeometry::Error( msg ) );
mErrorCount++;
return;
}
int j = 0;
while ( j < line.size() - 1 )
{
int n = 0;
while ( j < line.size() - 1 && line[j] == line[j + 1] )
{
line.remove( j );
n++;
}
if ( n > 0 )
{
QString msg = QObject::tr( "line %1 contains %n duplicate node(s) at %2", "number of duplicate nodes", n ).arg( i ).arg( j );
QgsDebugMsg( msg );
emit errorFound( QgsGeometry::Error( msg, line[j] ) );
mErrorCount++;
}
j++;
}
for ( j = 0; !mStop && j < line.size() - 3; j++ )
{
QgsVector v = line[j + 1] - line[j];
double vl = v.length();
int n = ( j == 0 && ring ) ? line.size() - 2 : line.size() - 1;
for ( int k = j + 2; !mStop && k < n; k++ )
{
QgsVector w = line[k + 1] - line[k];
QgsPointXY s;
if ( !intersectLines( line[j], v, line[k], w, s ) )
continue;
double d = 0.0;
try
{
d = -distLine2Point( line[j], v.perpVector(), s );
}
catch ( QgsException &e )
{
Q_UNUSED( e );
QgsDebugMsg( "Error validating: " + e.what() );
continue;
}
if ( d < 0 || d > vl )
continue;
try
{
d = -distLine2Point( line[k], w.perpVector(), s );
}
catch ( QgsException &e )
{
Q_UNUSED( e );
QgsDebugMsg( "Error validating: " + e.what() );
continue;
}
if ( d <= 0 || d >= w.length() )
continue;
QString msg = QObject::tr( "segments %1 and %2 of line %3 intersect at %4" ).arg( j ).arg( k ).arg( i ).arg( s.toString() );
QgsDebugMsg( msg );
emit errorFound( QgsGeometry::Error( msg, s ) );
mErrorCount++;
}
}
}
