bool QgsPointDisplacementRenderer::renderFeature( QgsFeature& feature, QgsRenderContext& context, int layer, bool selected, bool drawVertexMarker )
{
Q_UNUSED( drawVertexMarker );
Q_UNUSED( context );
Q_UNUSED( layer );
//check, if there is already a point at that position
if ( !feature.constGeometry() )
return false;
QgsSymbolV2* symbol = firstSymbolForFeature( mRenderer, feature, context );
//if the feature has no symbol (eg, no matching rule in a rule-based renderer), skip it
if ( !symbol )
return false;
//point position in screen coords
const QgsGeometry* geom = feature.constGeometry();
QGis::WkbType geomType = geom->wkbType();
if ( geomType != QGis::WKBPoint && geomType != QGis::WKBPoint25D )
{
//can only render point type
return false;
}
if ( selected )
mSelectedFeatures.insert( feature.id() );
double searchDistance = mTolerance * QgsSymbolLayerV2Utils::mapUnitScaleFactor( context, mToleranceUnit, mToleranceMapUnitScale );
QList<QgsFeatureId> intersectList = mSpatialIndex->intersects( searchRect( feature.constGeometry()->asPoint(), searchDistance ) );
if ( intersectList.empty() )
{
mSpatialIndex->insertFeature( feature );
// create new group
DisplacementGroup newGroup;
newGroup.insert( feature.id(), qMakePair( feature, symbol ) );
mDisplacementGroups.push_back( newGroup );
// add to group index
mGroupIndex.insert( feature.id(), mDisplacementGroups.count() - 1 );
return true;
}
//go through all the displacement group maps and search an entry where the id equals the result of the spatial search
QgsFeatureId existingEntry = intersectList.at( 0 );
int groupIdx = mGroupIndex[ existingEntry ];
DisplacementGroup& group = mDisplacementGroups[groupIdx];
// add to a group
group.insert( feature.id(), qMakePair( feature, symbol ) );
// add to group index
mGroupIndex.insert( feature.id(), groupIdx );
return true;
}
bool QgsPointDisplacementRenderer::renderFeature( QgsFeature& feature, QgsRenderContext& context, int layer, bool selected, bool drawVertexMarker )
{
Q_UNUSED( drawVertexMarker );
Q_UNUSED( context );
Q_UNUSED( layer );
//check, if there is already a point at that position
if ( !feature.geometry() )
return false;
//point position in screen coords
QgsGeometry* geom = feature.geometry();
QGis::WkbType geomType = geom->wkbType();
if ( geomType != QGis::WKBPoint && geomType != QGis::WKBPoint25D )
{
//can only render point type
return false;
}
if ( selected )
mSelectedFeatures.insert( feature.id() );
QList<QgsFeatureId> intersectList = mSpatialIndex->intersects( searchRect( feature.geometry()->asPoint() ) );
if ( intersectList.empty() )
{
mSpatialIndex->insertFeature( feature );
// create new group
DisplacementGroup newGroup;
newGroup.insert( feature.id(), feature );
mDisplacementGroups.push_back( newGroup );
// add to group index
mGroupIndex.insert( feature.id(), mDisplacementGroups.count() - 1 );
return true;
}
//go through all the displacement group maps and search an entry where the id equals the result of the spatial search
QgsFeatureId existingEntry = intersectList.at( 0 );
int groupIdx = mGroupIndex[ existingEntry ];
DisplacementGroup& group = mDisplacementGroups[groupIdx];
// add to a group
group.insert( feature.id(), feature );
// add to group index
mGroupIndex.insert( feature.id(), groupIdx );
return true;
}
