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#pragma once
#include <string>
#include "inode.h"
#include "ieclass.h"
#include "ObservedUndoable.h"
#include <sigc++/connection.h>
/**
* @brief A ModelKey watches the "model" spawnarg of an entity.
*
* As soon as the keyvalue changes, the according modelnode is loaded and
* inserted into the entity's Traversable.
*/
class ModelKey :
public sigc::trackable
{
private:
// The parent node, where the model node can be added to (as child)
scene::INode& _parentNode;
struct ModelNodeAndPath
{
scene::INodePtr node;
std::string path;
std::string explicitSkin;
bool modelDefMonitored;
};
ModelNodeAndPath _model;
// To deactivate model handling during node destruction
bool _active;
// Saves modelnode and modelpath to undo stack
undo::ObservedUndoable<ModelNodeAndPath> _undo;
sigc::connection _modelDefChanged;
public:
ModelKey(scene::INode& parentNode);
// Remove any model node from the parent entity
// used during Entity destruction to remove any child nodes
// before the parent entity node is going out of business.
// Disables any further behaviour of this instance, it will no longer be functional
void destroy();
// Refreshes the attached model
void refreshModel();
// Update the model to the provided keyvalue, this removes the old scene::Node
// and inserts the new one after acquiring the model from the cache.
void modelChanged(const std::string& value);
// Gets called by the attached Entity when the "skin" spawnarg changes
void skinChanged(const std::string& value);
// Returns the reference to the "singleton" model node
const scene::INodePtr& getNode() const;
void connectUndoSystem(IUndoSystem& undoSystem);
void disconnectUndoSystem(IUndoSystem& undoSystem);
private:
void onModelDefChanged();
// Loads the model node and attaches it to the parent node
void attachModelNode();
void detachModelNode();
// Attaches a model node, making sure that the skin setting is kept
void attachModelNodeKeepingSkin();
void importState(const ModelNodeAndPath& data);
void subscribeToModelDef(const IModelDef::Ptr& modelDef);
void unsubscribeFromModelDef();
};
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