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#ifndef _CONVERTTRACK_H_ #define _CONVERTTRACK_H_ #include "operation.h" class Song; class Track; /** This class converts a track of a type to a track of another type. Therefore a new (empty) track is created. * The content is kept and passed to the new track. The presentation is hidden and a new one is created. * On undo/redo, the presentations hide and show (I experienced segfaults, deleting widgets by myself!) * The old track is kept in memory. * When this object is removed, either _old or _new should be removed (depending on the actual state (undone, redone,...) * Therefore the pointer _delete is introduced, pointing to either _new or _old */ class ConvertTrack : public Operation { private: Song * _song; Track * _old; Track * _new; Track * _delete; public: ConvertTrack(int,Track*,Song*); ConvertTrack(const ConvertTrack&); ~ConvertTrack(); void undo(); void redo(); virtual ostream & print(int,ostream&) const; virtual void flush(const char*) const; virtual Element * copy() const; }; #endif
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