/**
* Selection routine called by the mouse release event
* @param thePoint = QgsPoint representing the x, y coordinates of the mouse release event
*/
void eVisEventIdTool::select( QgsPoint thePoint )
{
if ( 0 == mCanvas )
return;
QgsVectorLayer* myLayer = ( QgsVectorLayer* )mCanvas->currentLayer( );
// create the search rectangle. this was modeled after the QgsMapIdentifyTool in core QGIS application
double searchWidth = mCanvas->extent( ).width( ) * (( double )QGis::DEFAULT_IDENTIFY_RADIUS / 100.0 );
QgsRectangle myRectangle;
myRectangle.setXMinimum( thePoint.x( ) - searchWidth );
myRectangle.setXMaximum( thePoint.x( ) + searchWidth );
myRectangle.setYMinimum( thePoint.y( ) - searchWidth );
myRectangle.setYMaximum( thePoint.y( ) + searchWidth );
//Transform rectange to map coordinates
myRectangle = toLayerCoordinates( myLayer, myRectangle );
//Rather than add to the current selection, clear all selected features
myLayer->removeSelection( false );
//select features
QgsFeatureIterator fit = myLayer->getFeatures( QgsFeatureRequest().setFilterRect( myRectangle ).setFlags( QgsFeatureRequest::ExactIntersect ).setSubsetOfAttributes( QgsAttributeList() ) );
QgsFeature f;
QgsFeatureIds newSelectedFeatures;
while ( fit.nextFeature( f ) )
{
newSelectedFeatures.insert( f.id() );
}
myLayer->setSelectedFeatures( newSelectedFeatures );
//Launch a new event browser to view selected features
mBrowser = new eVisGenericEventBrowserGui( mCanvas, mCanvas, NULL );
mBrowser->setAttribute( Qt::WA_DeleteOnClose );
}
void QgsMapToolSelectUtils::setSelectFeatures( QgsMapCanvas* canvas,
QgsGeometry* selectGeometry,
bool doContains,
bool doDifference,
bool singleSelect )
{
if ( selectGeometry->type() != QGis::Polygon )
{
return;
}
QgsVectorLayer* vlayer = QgsMapToolSelectUtils::getCurrentVectorLayer( canvas );
if ( vlayer == NULL )
{
return;
}
// toLayerCoordinates will throw an exception for any 'invalid' points in
// the rubber band.
// For example, if you project a world map onto a globe using EPSG 2163
// and then click somewhere off the globe, an exception will be thrown.
QgsGeometry selectGeomTrans( *selectGeometry );
if ( canvas->mapSettings().hasCrsTransformEnabled() )
{
try
{
QgsCoordinateTransform ct( canvas->mapSettings().destinationCrs(), vlayer->crs() );
selectGeomTrans.transform( ct );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
// catch exception for 'invalid' point and leave existing selection unchanged
QgsLogger::warning( "Caught CRS exception " + QString( __FILE__ ) + ": " + QString::number( __LINE__ ) );
QgisApp::instance()->messageBar()->pushMessage(
QObject::tr( "CRS Exception" ),
QObject::tr( "Selection extends beyond layer's coordinate system" ),
QgsMessageBar::WARNING,
QgisApp::instance()->messageTimeout() );
return;
}
}
QApplication::setOverrideCursor( Qt::WaitCursor );
QgsDebugMsg( "Selection layer: " + vlayer->name() );
QgsDebugMsg( "Selection polygon: " + selectGeomTrans.exportToWkt() );
QgsDebugMsg( "doContains: " + QString( doContains ? "T" : "F" ) );
QgsDebugMsg( "doDifference: " + QString( doDifference ? "T" : "F" ) );
QgsFeatureIterator fit = vlayer->getFeatures( QgsFeatureRequest().setFilterRect( selectGeomTrans.boundingBox() ).setFlags( QgsFeatureRequest::ExactIntersect ).setSubsetOfAttributes( QgsAttributeList() ) );
QgsFeatureIds newSelectedFeatures;
QgsFeature f;
QgsFeatureId closestFeatureId = 0;
bool foundSingleFeature = false;
double closestFeatureDist = std::numeric_limits<double>::max();
while ( fit.nextFeature( f ) )
{
QgsGeometry* g = f.geometry();
if ( doContains )
{
if ( !selectGeomTrans.contains( g ) )
continue;
}
else
{
if ( !selectGeomTrans.intersects( g ) )
continue;
}
if ( singleSelect )
{
foundSingleFeature = true;
double distance = g->distance( selectGeomTrans );
if ( distance <= closestFeatureDist )
{
closestFeatureDist = distance;
closestFeatureId = f.id();
}
}
else
{
newSelectedFeatures.insert( f.id() );
}
}
if ( singleSelect && foundSingleFeature )
{
newSelectedFeatures.insert( closestFeatureId );
}
QgsDebugMsg( "Number of new selected features: " + QString::number( newSelectedFeatures.size() ) );
if ( doDifference )
{
QgsFeatureIds layerSelectedFeatures = vlayer->selectedFeaturesIds();
QgsFeatureIds selectedFeatures;
QgsFeatureIds deselectedFeatures;
QgsFeatureIds::const_iterator i = newSelectedFeatures.constEnd();
while ( i != newSelectedFeatures.constBegin() )
{
--i;
if ( layerSelectedFeatures.contains( *i ) )
{
deselectedFeatures.insert( *i );
}
else
{
selectedFeatures.insert( *i );
}
}
vlayer->modifySelection( selectedFeatures, deselectedFeatures );
}
else
{
vlayer->setSelectedFeatures( newSelectedFeatures );
}
QApplication::restoreOverrideCursor();
}
void QgsGeometrySnapperDialog::run()
{
/** Get layers **/
QgsVectorLayer* layer = getInputLayer();
QgsVectorLayer* referenceLayer = getReferenceLayer();
if ( layer == 0 || referenceLayer == 0 )
{
return;
}
if ( ui.radioButtonOutputNew->isChecked() &&
( layer->dataProvider()->dataSourceUri().startsWith( ui.lineEditOutput->text() ) ||
referenceLayer->dataProvider()->dataSourceUri().startsWith( ui.lineEditOutput->text() ) ) )
{
QMessageBox::critical( this, tr( "Invalid Output Layer" ), tr( "The chosen output layer is the same as an input layer." ) );
return;
}
bool selectedOnly = ui.checkBoxInputSelectedOnly->isChecked();
/** Duplicate if necessary **/
if ( ui.radioButtonOutputNew->isChecked() )
{
QString filename = ui.lineEditOutput->text();
// Remove existing layer with same uri
QStringList toRemove;
foreach ( QgsMapLayer* maplayer, QgsMapLayerRegistry::instance()->mapLayers() )
{
if ( dynamic_cast<QgsVectorLayer*>( maplayer ) &&
static_cast<QgsVectorLayer*>( maplayer )->dataProvider()->dataSourceUri().startsWith( filename ) )
{
toRemove.append( maplayer->id() );
}
}
if ( !toRemove.isEmpty() )
{
QgsMapLayerRegistry::instance()->removeMapLayers( toRemove );
}
QString errMsg;
QgsVectorFileWriter::WriterError err = QgsVectorFileWriter::writeAsVectorFormat( layer, filename, layer->dataProvider()->encoding(), &layer->crs(), mOutputDriverName, selectedOnly, &errMsg );
if ( err != QgsVectorFileWriter::NoError )
{
QMessageBox::critical( this, tr( "Layer Creation Failed" ), tr( "Failed to create the output layer: %1" ).arg( errMsg ) );
return;
}
QgsVectorLayer* newlayer = new QgsVectorLayer( filename, QFileInfo( filename ).completeBaseName(), "ogr" );
if ( selectedOnly )
{
QgsFeature feature;
// Get features to select (only selected features were written up to this point)
QgsFeatureIds selectedFeatures = newlayer->allFeatureIds();
// Write non-selected feature ids
QgsFeatureList features;
QgsFeatureIterator it = layer->getFeatures();
while ( it.nextFeature( feature ) )
{
if ( !layer->selectedFeaturesIds().contains( feature.id() ) )
{
features.append( feature );
}
}
newlayer->dataProvider()->addFeatures( features );
// Set selected features
newlayer->setSelectedFeatures( selectedFeatures );
}
layer = newlayer;
}
