void QgsMapToolNodeTool::createMovingRubberBands()
{
int topologicalEditing = QgsProject::instance()->readNumEntry( "Digitizing", "/TopologicalEditing", 0 );
Q_ASSERT( mSelectedFeature );
QgsVectorLayer *vlayer = mSelectedFeature->vlayer();
Q_ASSERT( vlayer );
QList<QgsVertexEntry*> &vertexMap = mSelectedFeature->vertexMap();
QgsGeometry* geometry = mSelectedFeature->geometry();
int beforeVertex, afterVertex;
int lastRubberBand = 0;
int vertex;
for ( int i = 0; i < vertexMap.size(); i++ )
{
// create rubberband
if ( vertexMap[i]->isSelected() && !vertexMap[i]->isInRubberBand() )
{
geometry->adjacentVertices( i, beforeVertex, afterVertex );
vertex = i;
while ( beforeVertex != -1 )
{
// move forward NOTE: end if whole cycle is selected
if ( vertexMap[beforeVertex]->isSelected() && beforeVertex != i ) // and take care of cycles
{
vertex = beforeVertex;
geometry->adjacentVertices( vertex, beforeVertex, afterVertex );
}
else
{
// break if cycle is found
break;
}
}
// we have first vertex of moving part
// create rubberband and set default paramaters
QgsRubberBand* rb = new QgsRubberBand( mCanvas, QGis::Line );
rb->setWidth( 2 );
rb->setColor( Qt::blue );
int index = 0;
if ( beforeVertex != -1 ) // adding first point which is not moving
{
rb->addPoint( toMapCoordinates( vlayer, vertexMap[beforeVertex]->point() ), false );
vertexMap[beforeVertex]->setRubberBandValues( true, lastRubberBand, index );
index++;
}
while ( vertex != -1 && vertexMap[vertex]->isSelected() && !vertexMap[vertex]->isInRubberBand() )
{
// topology rubberband creation if needed
if ( topologicalEditing )
{
createTopologyRubberBands( vlayer, vertexMap, vertex );
}
// adding point which will be moved
rb->addPoint( toMapCoordinates( vlayer, vertexMap[vertex]->point() ), false );
// setting values about added vertex
vertexMap[vertex]->setRubberBandValues( true, lastRubberBand, index );
index++;
geometry->adjacentVertices( vertex, beforeVertex, vertex );
}
if ( vertex != -1 && !vertexMap[vertex]->isSelected() ) // add last point not moving if exists
{
rb->addPoint( toMapCoordinates( vlayer, vertexMap[vertex]->point() ), true );
vertexMap[vertex]->setRubberBandValues( true, lastRubberBand, index );
index++;
}
mRubberBands.append( rb );
lastRubberBand++;
}
}
}
void QgsMapToolNodeTool::createTopologyRubberBands( QgsVectorLayer* vlayer, const QList<QgsVertexEntry*> &vertexMap, int vertex )
{
QMultiMap<double, QgsSnappingResult> currentResultList;
QgsGeometry *geometry = mSelectedFeature->geometry();
// snap from current vertex
currentResultList.clear();
vlayer->snapWithContext( vertexMap[vertex]->point(), ZERO_TOLERANCE, currentResultList, QgsSnapper::SnapToVertex );
QMultiMap<double, QgsSnappingResult>::iterator resultIt = currentResultList.begin();
for ( ; resultIt != currentResultList.end(); ++resultIt )
{
// move all other
if ( mSelectedFeature->featureId() != resultIt.value().snappedAtGeometry )
{
if ( mTopologyMovingVertexes.contains( resultIt.value().snappedAtGeometry ) )
{
if ( mTopologyMovingVertexes[resultIt.value().snappedAtGeometry]->contains( resultIt.value().snappedVertexNr ) )
{
// skip vertex already exists in some rubberband
continue;
}
}
QgsRubberBand* trb = new QgsRubberBand( mCanvas, QGis::Line );
mTopologyRubberBand.append( trb );
int rbId = mTopologyRubberBand.size() - 1;
trb->setWidth( 1 );
trb->setColor( Qt::red );
int tVertex = resultIt.value().snappedVertexNr;
int tVertexBackup = -1, tVertexAfter = -1;
int tVertexFirst = tVertex; // vertex number to check for cycling
QgsFeature topolFeature;
vlayer->getFeatures( QgsFeatureRequest().setFilterFid( resultIt.value().snappedAtGeometry ).setSubsetOfAttributes( QgsAttributeList() ) ).nextFeature( topolFeature );
QgsGeometry* topolGeometry = topolFeature.geometry();
while ( tVertex != -1 ) // looking for first vertex to rubberband
{
tVertexBackup = tVertex;
topolGeometry->adjacentVertices( tVertex, tVertex, tVertexAfter );
if ( tVertex == -1 || tVertex == tVertexFirst )
break; // check if this is not first vertex of the feature or cycling error
// if closest vertex is not from selected feature or is not selected end
double dist;
QgsPoint point = topolGeometry->vertexAt( tVertex );
int at, before, after;
geometry->closestVertex( point, at, before, after, dist );
if ( dist > ZERO_TOLERANCE || !vertexMap[at]->isSelected() ) // problem with double precision
{
break; // found first vertex
}
}
int movingPointIndex = 0;
Vertexes* movingPoints = new Vertexes();
Vertexes* addedPoints = new Vertexes();
if ( mTopologyMovingVertexes.contains( resultIt.value().snappedAtGeometry ) )
{
addedPoints = mTopologyMovingVertexes[ resultIt.value().snappedAtGeometry ];
}
if ( tVertex == -1 ) // adding first point if needed
{
tVertex = tVertexBackup;
}
else
{
trb->addPoint( toMapCoordinates( vlayer, topolGeometry->vertexAt( tVertex ) ) );
if ( tVertex == tVertexFirst ) // cycle first vertex need to be added also
{
movingPoints->insert( movingPointIndex );
}
movingPointIndex = 1;
topolGeometry->adjacentVertices( tVertex, tVertexAfter, tVertex );
}
while ( tVertex != -1 )
{
// if closest vertex is not from selected feature or is not selected end
double dist;
QgsPoint point = topolGeometry->vertexAt( tVertex );
int at, before, after;
geometry->closestVertex( point, at, before, after, dist );
// find first no matching vertex
if ( dist > ZERO_TOLERANCE || !vertexMap[at]->isSelected() ) // problem with double precision
{
trb->addPoint( toMapCoordinates( vlayer, topolGeometry->vertexAt( tVertex ) ) );
break; // found first vertex
}
else // add moving point to rubberband
{
if ( addedPoints->contains( tVertex ) )
break; // just preventing to circle
trb->addPoint( toMapCoordinates( vlayer, topolGeometry->vertexAt( tVertex ) ) );
movingPoints->insert( movingPointIndex );
movingPointIndex++;
addedPoints->insert( tVertex );
}
topolGeometry->adjacentVertices( tVertex, tVertexAfter, tVertex );
}
mTopologyMovingVertexes.insert( resultIt.value().snappedAtGeometry, addedPoints );
mTopologyRubberBandVertexes.insert( rbId, movingPoints );
}
}
}
