Polygon*
GeometryEditor::editPolygon(const Polygon *polygon,GeometryEditorOperation *operation)
{
Polygon* newPolygon=(Polygon*) operation->edit(polygon, factory);
if (newPolygon->isEmpty()) {
//RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
return newPolygon;
}
LinearRing* shell = (LinearRing*) edit(newPolygon->getExteriorRing(),operation);
if (shell->isEmpty()) {
//RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
delete shell;
delete newPolygon;
return factory->createPolygon(NULL,NULL);
}
vector<Geometry*> *holes=new vector<Geometry*>;
for (int i=0;i<newPolygon->getNumInteriorRing(); i++) {
LinearRing *hole =(LinearRing*) edit(newPolygon->getInteriorRingN(i),operation);
if (hole->isEmpty()) {
continue;
}
holes->push_back(hole);
}
delete newPolygon;
return factory->createPolygon(shell,holes);
}
Polygon*
GeometryEditor::editPolygon(const Polygon *polygon,GeometryEditorOperation *operation)
{
Polygon* newPolygon= dynamic_cast<Polygon*>(
operation->edit(polygon, factory)
);
if (newPolygon->isEmpty()) {
//RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
return newPolygon;
}
Geometry* editResult = edit(newPolygon->getExteriorRing(),operation);
LinearRing* shell = dynamic_cast<LinearRing*>(editResult);
if (shell->isEmpty()) {
//RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
delete shell;
delete newPolygon;
return factory->createPolygon(NULL,NULL);
}
vector<Geometry*> *holes=new vector<Geometry*>;
for (size_t i=0, n=newPolygon->getNumInteriorRing(); i<n; ++i)
{
Geometry *hole_geom = edit(newPolygon->getInteriorRingN(i),
operation);
LinearRing *hole = dynamic_cast<LinearRing*>(hole_geom);
assert(hole);
if (hole->isEmpty())
{
continue;
}
holes->push_back(hole);
}
delete newPolygon;
return factory->createPolygon(shell,holes);
}
void Polygon::AddGeometry(Geometry *pGeometry)
{
LinearRing *pring = dynamic_cast<LinearRing*>(pGeometry);
if(pring ==NULL)
{
return;
}
//如果环是不闭合的,并且不是一个空环，则不能加入到多边形中
if(!pring->isClosed() && !pring->isEmpty())
{
return;
}
//当外环为空时，将这个环替换外环
if(shell->isEmpty())
{
delete shell;
shell =pring;
return;
}
holes->push_back(pring);
}