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, const std::string &> signal_name_changed;
  38         sigc::signal<void, Track &> signal_track_added;
  39         sigc::signal<void, Track &> signal_track_removed;
  40
  41 protected:
  42         Layout &layout;
  43         std::string name;
  44         TrackSet tracks;
  45         TrackIter ends[2];
  46
  47         TrackChain(Layout &);
  48 public:
  49         virtual ~TrackChain() { }
  50
  51         virtual void set_name(const std::string &);
  52         const std::string &get_name() const { return name; }
  53
  54         void add_track(Track &);
  55         void add_tracks(const TrackSet &);
  56 protected:
  57         virtual void on_track_added(Track &) { }
  58         virtual Validity check_validity(Track &) const;
  59         static void throw_bad_chain(Validity);
  60 private:
  61         void update_ends(Track &);
  62 public:
  63         const TrackSet &get_tracks() const { return tracks; }
  64         bool has_track(Track &) const;
  65
  66 private:
  67         void object_removed(Object &);
  68 };
  69
  70 } // namespace R2C2
  71
  72 #endif