QgsGrassFeatureIterator::QgsGrassFeatureIterator( QgsGrassFeatureSource* source, bool ownSource, const QgsFeatureRequest& request )
: QgsAbstractFeatureIteratorFromSource<QgsGrassFeatureSource>( source, ownSource, request )
{
sMutex.lock();
// Init structures
mPoints = Vect_new_line_struct();
mCats = Vect_new_cats_struct();
mList = Vect_new_list();
// Create selection array
allocateSelection( mSource->mMap );
resetSelection( 1 );
if ( request.filterType() == QgsFeatureRequest::FilterRect )
{
setSelectionRect( request.filterRect(), request.flags() & QgsFeatureRequest::ExactIntersect );
}
else
{
// TODO: implement fast lookup by feature id
//no filter - use all features
resetSelection( 1 );
}
}
QgsGrassFeatureIterator::QgsGrassFeatureIterator( QgsGrassProvider* p, const QgsFeatureRequest& request )
: QgsAbstractFeatureIterator( request ), P( p )
{
// make sure that only one iterator is active
if ( P->mActiveIterator )
{
QgsMessageLog::logMessage( QObject::tr( "Already active iterator on this provider was closed." ), QObject::tr( "GRASS" ) );
P->mActiveIterator->close();
}
P->mActiveIterator = this;
// check if outdated and update if necessary
P->ensureUpdated();
// Init structures
mPoints = Vect_new_line_struct();
mCats = Vect_new_cats_struct();
mList = Vect_new_list();
// Create selection array
allocateSelection( P->mMap );
resetSelection( 1 );
if ( request.filterType() == QgsFeatureRequest::FilterRect )
{
setSelectionRect( request.filterRect(), request.flags() & QgsFeatureRequest::ExactIntersect );
}
else
{
// TODO: implement fast lookup by feature id
//no filter - use all features
resetSelection( 1 );
}
}
/**
* Process the mouse move event.
*/
void InputControllerMoveUnwrapped::mouseMoveEvent(QMouseEvent *event)
{
if ( m_isButtonPressed )
{
m_rect.setBottomRight(QPoint(event->x(),event->y()));
emit setSelectionRect(m_rect);
}
}
QgsGrassFeatureIterator::QgsGrassFeatureIterator( QgsGrassFeatureSource* source, bool ownSource, const QgsFeatureRequest& request )
: QgsAbstractFeatureIteratorFromSource<QgsGrassFeatureSource>( source, ownSource, request )
, mCanceled( false )
, mNextCidx( 0 )
, mNextLid( 1 )
{
QgsDebugMsg( "entered" );
// WARNING: the iterater cannot use mutex lock for its whole life, because QgsVectorLayerFeatureIterator is opening
// multiple iterators if features are edited -> lock only critical sections
// Create selection
int size = 1 + qMax( Vect_get_num_lines( mSource->map() ), Vect_get_num_areas( mSource->map() ) );
QgsDebugMsg( QString( "mSelection.resize(%1)" ).arg( size ) );
mSelection.resize( size );
if ( !request.filterRect().isNull() )
{
setSelectionRect( request.filterRect(), request.flags() & QgsFeatureRequest::ExactIntersect );
}
else
{
//no filter - use all features
mSelection.fill( true );
}
connect( mSource->mLayer->map(), SIGNAL( cancelIterators() ), this, SLOT( cancel() ), Qt::DirectConnection );
Qt::ConnectionType connectionType = Qt::DirectConnection;
if ( mSource->mLayer->map()->thread() != thread() )
{
// Using BlockingQueuedConnection may be dangerous, if the iterator was later moved to maps thread, it would cause dead lock on emit closeIterators()
QgsDebugMsg( "map and iterator are on different threads -> connect closeIterators() with BlockingQueuedConnection" );
connectionType = Qt::BlockingQueuedConnection;
}
connect( mSource->mLayer->map(), SIGNAL( closeIterators() ), this, SLOT( doClose() ), connectionType );
}
