#include "locateNode.hpp"

#include "NodeGraphicsObject.hpp"

#include <QtCore/QList>

#include <QtWidgets/QGraphicsScene>

namespace QtNodes {

NodeGraphicsObject *locateNodeAt(QPointF scenePoint,

QGraphicsScene &scene,

QTransform const &viewTransform)

{

// items under cursor

QList<QGraphicsItem *> items = scene.items(scenePoint,

Qt::IntersectsItemShape,

Qt::DescendingOrder,

viewTransform);

// items convertable to NodeGraphicsObject

std::vector<QGraphicsItem *> filteredItems;

std::copy_if(items.begin(),

items.end(),

std::back_inserter(filteredItems),

[](QGraphicsItem *item) {

return (qgraphicsitem_cast<NodeGraphicsObject *>(item) != nullptr);

});

NodeGraphicsObject *node = nullptr;

if (!filteredItems.empty()) {

QGraphicsItem *graphicsItem = filteredItems.front();

node = dynamic_cast<NodeGraphicsObject *>(graphicsItem);

}

return node;

}

} // namespace QtNodes