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#pragma once
#include "ientity.h"
#include <functional>
namespace entity
{
/**
* greebo: A KeyObserver wrapping around a function object.
* The function is called as soon as the onKeyValueChanged
* event is fired.
*/
class KeyObserverDelegate :
public KeyObserver
{
private:
// The callback which is invoked on key value change
KeyObserverFunc _callback;
public:
KeyObserverDelegate() :
_callback(std::bind(&KeyObserverDelegate::emptyCallback, this, std::placeholders::_1))
{}
KeyObserverDelegate(const KeyObserverFunc& callback) :
_callback(callback)
{}
void setCallback(const KeyObserverFunc& callback)
{
_callback = callback;
}
void onKeyValueChanged(const std::string& newValue)
{
_callback(newValue);
}
private:
void emptyCallback(const std::string& newValue)
{}
};
} // namespace entity
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