bool QgsCurvePolygon::insertVertex( QgsVertexId vId, const QgsPoint &vertex )
{
if ( !mExteriorRing || vId.ring < 0 || vId.ring >= 1 + mInteriorRings.size() )
{
return false;
}
QgsCurve *ring = vId.ring == 0 ? mExteriorRing.get() : mInteriorRings.at( vId.ring - 1 );
int n = ring->numPoints();
bool success = ring->insertVertex( QgsVertexId( 0, 0, vId.vertex ), vertex );
if ( !success )
{
return false;
}
// If first or last vertex is inserted, re-sync the last/first vertex
if ( vId.vertex == 0 )
ring->moveVertex( QgsVertexId( 0, 0, n ), vertex );
else if ( vId.vertex == n )
ring->moveVertex( QgsVertexId( 0, 0, 0 ), vertex );
clearCache();
return true;
}
bool QgsTriangle::moveVertex( QgsVertexId vId, const QgsPointV2 &newPos )
{
if ( !mExteriorRing || vId.part != 0 || vId.ring != 0 || vId.vertex < 0 || vId.vertex > 4 )
{
return false;
}
if ( vId.vertex == 4 )
{
vId.vertex = 0;
}
QgsPointV2 p1( vId.vertex == 0 ? newPos : vertexAt( 0 ) );
QgsPointV2 p2( vId.vertex == 1 ? newPos : vertexAt( 1 ) );
QgsPointV2 p3( vId.vertex == 2 ? newPos : vertexAt( 2 ) );
if ( !validateGeom( p1, p2, p3 ) )
{
return false;
}
QgsCurve *ring = mExteriorRing;
int n = ring->numPoints();
bool success = ring->moveVertex( vId, newPos );
if ( success )
{
// If first or last vertex is moved, also move the last/first vertex
if ( vId.vertex == 0 )
ring->moveVertex( QgsVertexId( vId.part, vId.ring, n - 1 ), newPos );
clearCache();
}
return success;
}
bool QgsCurvePolygon::deleteVertex( QgsVertexId vId )
{
if ( !mExteriorRing || vId.ring < 0 || vId.ring >= 1 + mInteriorRings.size() )
{
return false;
}
QgsCurve *ring = vId.ring == 0 ? mExteriorRing.get() : mInteriorRings.at( vId.ring - 1 );
int n = ring->numPoints();
if ( n <= 4 )
{
//no points will be left in ring, so remove whole ring
if ( vId.ring == 0 )
{
mExteriorRing.reset();
if ( !mInteriorRings.isEmpty() )
{
mExteriorRing.reset( mInteriorRings.takeFirst() );
}
}
else
{
removeInteriorRing( vId.ring - 1 );
}
clearCache();
return true;
}
bool success = ring->deleteVertex( vId );
if ( success )
{
// If first or last vertex is removed, re-sync the last/first vertex
// Do not use "n - 2", but "ring->numPoints() - 1" as more than one vertex
// may have been deleted (e.g. with CircularString)
if ( vId.vertex == 0 )
ring->moveVertex( QgsVertexId( 0, 0, ring->numPoints() - 1 ), ring->vertexAt( QgsVertexId( 0, 0, 0 ) ) );
else if ( vId.vertex == n - 1 )
ring->moveVertex( QgsVertexId( 0, 0, 0 ), ring->vertexAt( QgsVertexId( 0, 0, ring->numPoints() - 1 ) ) );
clearCache();
}
return success;
}
bool QgsCurvePolygon::moveVertex( QgsVertexId vId, const QgsPoint &newPos )
{
if ( !mExteriorRing || vId.ring < 0 || vId.ring >= 1 + mInteriorRings.size() )
{
return false;
}
QgsCurve *ring = vId.ring == 0 ? mExteriorRing.get() : mInteriorRings.at( vId.ring - 1 );
int n = ring->numPoints();
bool success = ring->moveVertex( vId, newPos );
if ( success )
{
// If first or last vertex is moved, also move the last/first vertex
if ( vId.vertex == 0 )
ring->moveVertex( QgsVertexId( vId.part, vId.ring, n - 1 ), newPos );
else if ( vId.vertex == n - 1 )
ring->moveVertex( QgsVertexId( vId.part, vId.ring, 0 ), newPos );
clearCache();
}
return success;
}
