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#pragma once
#include "ientity.h"
#include <sigc++/connection.h>
#include "Target.h"
namespace entity
{
class TargetKeyCollection;
/**
* greebo: A TargetKey represents a "targetN" key of a given entity.
* It acts as Observer for this key and maintains a reference to
* the named Target.
*
* Note: An Entity can have multiple "targetN" keys, hence it can hold
* multiple instances of this TargetKey class. They are stored in and
* maintainted by the TargetKeyCollection container.
*
* Note: Each TargetKey instance can only refer to one Target.
*/
class TargetKey :
public KeyObserver
{
private:
TargetKeyCollection& _owner;
std::string _curValue;
// The target this key is pointing to (can be empty)
TargetPtr _target;
sigc::connection _positionChangedSignal;
public:
TargetKey(TargetKeyCollection& owner);
// Accessor method for the contained TargetPtr
const TargetPtr& getTarget() const;
// Called when the owning TargetableNode is inserted into or removed from the scene
void onTargetManagerChanged();
// Observes the given keyvalue
void attachToKeyValue(EntityKeyValue& value);
// Stops observing the given keyvalue
void detachFromKeyValue(EntityKeyValue& value);
// This gets called as soon as the "target" key in the spawnargs changes
void onKeyValueChanged(const std::string& newValue) override;
private:
void onTargetPositionChanged();
};
} // namespace entity
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