source/libr2c2/trackchain.h

   1 #ifndef LIBR2C2_TRACKCHAIN_H_
   2 #define LIBR2C2_TRACKCHAIN_H_
   3
   4 #include <set>
   5 #include <stdexcept>
   6 #include <sigc++/trackable.h>
   7 #include <msp/datafile/statement.h>
   8 #include "trackiter.h"
   9
  10 namespace R2C2 {
  11
  12 class Layout;
  13 class Object;
  14
  15 class bad_chain: public std::logic_error
  16 {
  17 public:
  18         bad_chain(const std::string &w): std::logic_error(w) { }
  19         virtual ~bad_chain() throw() { }
  20 };
  21
  22
  23 class TrackChain: public sigc::trackable
  24 {
  25 public:
  26         typedef std::set<Track *> TrackSet;
  27
  28 protected:
  29         enum Validity
  30         {
  31                 VALID,
  32                 UNLINKED,
  33                 BAD_PATH,
  34                 INCOMPATIBLE
  35         };
  36
  37 public:
  38         sigc::signal<void, const std::string &> signal_name_changed;
  39         sigc::signal<void, Track &> signal_track_added;
  40         sigc::signal<void, Track &> signal_track_removed;
  41
  42 protected:
  43         Layout &layout;
  44         std::string name;
  45         TrackSet tracks;
  46         TrackIter ends[2];
  47
  48         TrackChain(Layout &);
  49 public:
  50         virtual ~TrackChain() { }
  51
  52         virtual void set_name(const std::string &);
  53         const std::string &get_name() const { return name; }
  54
  55         void add_track(Track &);
  56         void add_tracks(const TrackSet &);
  57 protected:
  58         virtual void on_track_added(Track &) { }
  59         virtual Validity check_validity(Track &) const;
  60         static void throw_bad_chain(Validity);
  61 private:
  62         void update_ends(Track &);
  63 public:
  64         const TrackSet &get_tracks() const { return tracks; }
  65         bool has_track(Track &) const;
  66         bool is_loop() const;
  67
  68 private:
  69         void object_removed(Object &);
  70
  71 public:
  72         virtual Msp::DataFile::Statement save_reference() const = 0;
  73 };
  74
  75 } // namespace R2C2
  76
  77 #endif