QgsGeometry* QgsMapToolOffsetCurve::linestringFromPolygon( QgsGeometry* featureGeom, int vertex )
{
if ( !featureGeom )
{
return 0;
}
QGis::WkbType geomType = featureGeom->wkbType();
int currentVertex = 0;
QgsMultiPolygon multiPoly;
if ( geomType == QGis::WKBPolygon || geomType == QGis::WKBPolygon25D )
{
QgsPolygon polygon = featureGeom->asPolygon();
multiPoly.append( polygon );
}
else if ( geomType == QGis::WKBMultiPolygon || geomType == QGis::WKBMultiPolygon25D )
{
//iterate all polygons / rings
QgsMultiPolygon multiPoly = featureGeom->asMultiPolygon();
}
else
{
return 0;
}
QgsMultiPolygon::const_iterator multiPolyIt = multiPoly.constBegin();
for ( ; multiPolyIt != multiPoly.constEnd(); ++multiPolyIt )
{
QgsPolygon::const_iterator polyIt = multiPolyIt->constBegin();
for ( ; polyIt != multiPolyIt->constEnd(); ++polyIt )
{
currentVertex += polyIt->size();
if ( vertex < currentVertex )
{
//found, return ring
return QgsGeometry::fromPolyline( *polyIt );
}
}
}
return 0;
}
void QgsDxfExport::addFeature( const QgsSymbolV2RenderContext& ctx, const QString& layer, const QgsSymbolLayerV2* symbolLayer, const QgsSymbolV2* symbol )
{
const QgsFeature* fet = ctx.feature();
if ( !fet )
{
return;
}
QgsGeometry* geom = fet->geometry();
if ( geom )
{
int c = 0;
if ( mSymbologyExport != NoSymbology )
{
c = colorFromSymbolLayer( symbolLayer, ctx );
}
double width = -1;
if ( mSymbologyExport != NoSymbology && symbolLayer )
{
width = symbolLayer->dxfWidth( *this, ctx );
}
QString lineStyleName = "CONTINUOUS";
if ( mSymbologyExport != NoSymbology )
{
lineStyleName = lineStyleFromSymbolLayer( symbolLayer );
}
QGis::WkbType geometryType = geom->wkbType();
//single point
if ( geometryType == QGis::WKBPoint || geometryType == QGis::WKBPoint25D )
{
writePoint( geom->asPoint(), layer, c, fet, symbolLayer, symbol );
}
//multipoint
if ( geometryType == QGis::WKBMultiPoint || geometryType == QGis::WKBMultiPoint25D )
{
QgsMultiPoint multiPoint = geom->asMultiPoint();
QgsMultiPoint::const_iterator it = multiPoint.constBegin();
for ( ; it != multiPoint.constEnd(); ++it )
{
writePoint( *it, layer, c, fet, symbolLayer, symbol );
}
}
//single line
if ( geometryType == QGis::WKBLineString || geometryType == QGis::WKBLineString25D )
{
writePolyline( geom->asPolyline(), layer, lineStyleName, c, width, false );
}
//multiline
if ( geometryType == QGis::WKBMultiLineString || geometryType == QGis::WKBMultiLineString25D )
{
QgsMultiPolyline multiLine = geom->asMultiPolyline();
QgsMultiPolyline::const_iterator lIt = multiLine.constBegin();
for ( ; lIt != multiLine.constEnd(); ++lIt )
{
writePolyline( *lIt, layer, lineStyleName, c, width, false );
}
}
//polygon
if ( geometryType == QGis::WKBPolygon || geometryType == QGis::WKBPolygon25D )
{
QgsPolygon polygon = geom->asPolygon();
QgsPolygon::const_iterator polyIt = polygon.constBegin();
for ( ; polyIt != polygon.constEnd(); ++polyIt ) //iterate over rings
{
writePolyline( *polyIt, layer, lineStyleName, c, width, true );
}
}
//multipolygon or polygon
if ( geometryType == QGis::WKBMultiPolygon || geometryType == QGis::WKBMultiPolygon25D )
{
QgsMultiPolygon mp = geom->asMultiPolygon();
QgsMultiPolygon::const_iterator mpIt = mp.constBegin();
for ( ; mpIt != mp.constEnd(); ++mpIt )
{
QgsPolygon::const_iterator polyIt = mpIt->constBegin();
for ( ; polyIt != mpIt->constEnd(); ++polyIt )
{
writePolyline( *polyIt, layer, lineStyleName, c, width, true );
}
}
}
}
}