SaveCurrentTDirectory.h

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#ifndef _utl_SaveCurrentTDirectory_h_
#define _utl_SaveCurrentTDirectory_h_

#include <TDirectory.h>


namespace utl {

  /*
    \class SaveCurrentTDirectory

    Use it to save current TDirectory setting which will be
    restored upon destruction, ie when the object goes out
    of scope.

    \code
    if (saveRootFile) {
      SaveCurrentTDirectory save;
      TFile* const f = TFile::Open(...);
      canvas.Write();
    }
    \endcode

    \author Darko Veberic
  */

  class SaveCurrentTDirectory {
  public:
    SaveCurrentTDirectory() : fDirectory(gDirectory) { }

    ~SaveCurrentTDirectory() { fDirectory->cd(); }

  private:
    TDirectory* const fDirectory;
  };

}


#endif