LayoutSelection.hpp

#pragma once
#include <functional>
#include <vector>
 
namespace score
{
struct LayoutSelection
{
  int current{0};
  std::vector<std::function<void(int)>> listeners;
 
  void listen(std::function<void(int)> f)
  {
    f(current);
    listeners.push_back(std::move(f));
  }
 
  void select(int index)
  {
    if(index == current)
      return;
    current = index;
    for(auto& f : listeners)
      f(index);
  }
};
}