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 "trackiter.h"
   8
   9 namespace R2C2 {
  10
  11 class Layout;
  12 class Object;
  13
  14 class bad_chain: public std::logic_error
  15 {
  16 public:
  17         bad_chain(const std::string &w): std::logic_error(w) { }
  18         virtual ~bad_chain() throw() { }
  19 };
  20
  21
  22 class TrackChain: public sigc::trackable
  23 {
  24 public:
  25         typedef std::set<Track *> TrackSet;
  26
  27 protected:
  28         enum Validity
  29         {
  30                 VALID,
  31                 UNLINKED,
  32                 BAD_PATH,
  33                 INCOMPATIBLE
  34         };
  35
  36 public:
  37         sigc::signal<void, Track &> signal_track_added;
  38         sigc::signal<void, Track &> signal_track_removed;
  39
  40         Layout &layout;
  41         TrackSet tracks;
  42         TrackIter ends[2];
  43
  44         TrackChain(Layout &);
  45 public:
  46         virtual ~TrackChain() { }
  47
  48         void add_track(Track &);
  49         void add_tracks(const TrackSet &);
  50 protected:
  51         virtual void on_track_added(Track &) { }
  52         virtual Validity check_validity(Track &) const;
  53         static void throw_bad_chain(Validity);
  54 private:
  55         void update_ends(Track &);
  56 public:
  57         const TrackSet &get_tracks() const { return tracks; }
  58         bool has_track(Track &) const;
  59
  60 private:
  61         void object_removed(Object &);
  62 };
  63
  64 } // namespace R2C2
  65
  66 #endif