UndoRedo.h

#pragma once
#include "Track.h"
typedef struct undoredolist{
    undoredolist *prev, *next;
    Track* element;
}undoredolist;


class UndoRedo{
public:
    UndoRedo();
    ~UndoRedo();
    void add(Track* element);
    Track* undo(Track* element);
    Track* redo();
private:
    short keepbeforeundo;
    undoredolist* l, *c;
    void del_list(undoredolist* t);
};