ConnectionState.hpp

#pragma once

#include <QtCore/QUuid>

#include "Export.hpp"

#include "Definitions.hpp"

class QPointF;

namespace QtNodes {

class ConnectionGraphicsObject;

/// Stores currently draggind end.
/// Remembers last hovered Node.
class NODE_EDITOR_PUBLIC ConnectionState
{
public:
    /// Defines whether we construct a new connection
    /// or it is already binding two nodes.
    enum LooseEnd { Pending = 0, Connected = 1 };

public:
    ConnectionState(ConnectionGraphicsObject &cgo)
        : _cgo(cgo)
        , _hovered(false)
        , _frozen(false)
    {}

    ConnectionState(ConnectionState const &) = delete;
    ConnectionState(ConnectionState &&) = delete;

    ConnectionState &operator=(ConnectionState const &) = delete;
    ConnectionState &operator=(ConnectionState &&) = delete;

    ~ConnectionState();

public:
    PortType requiredPort() const;
    bool requiresPort() const;

    bool hovered() const;
    void setHovered(bool hovered);

    bool frozen() const { return _frozen; }
    void setFrozen(bool frozen) { _frozen = frozen; }

public:
    /// Caches NodeId for further interaction.
    void setLastHoveredNode(NodeId const nodeId);

    NodeId lastHoveredNode() const;

    void resetLastHoveredNode();

private:
    ConnectionGraphicsObject &_cgo;

    bool _hovered;

    NodeId _lastHoveredNode{InvalidNodeId};

    bool _frozen;
};
} // namespace QtNodes