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asyncTaskSequence.h
00001 // Filename: asyncTaskSequence.h
00002 // Created by:  drose (04Oct08)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef ASYNCTASKSEQUENCE_H
00016 #define ASYNCTASKSEQUENCE_H
00017 
00018 #include "pandabase.h"
00019 
00020 #include "asyncTask.h"
00021 #include "asyncTaskCollection.h"
00022 
00023 class AsyncTaskManager;
00024 
00025 ////////////////////////////////////////////////////////////////////
00026 //       Class : AsyncTaskSequence
00027 // Description : A special kind of task that serves as a list of tasks
00028 //               internally.  Each task on the list is executed in
00029 //               sequence, one per epoch.
00030 //
00031 //               This is similar to a Sequence interval, though it has
00032 //               some slightly different abilities.  For instance,
00033 //               although you can't start at any arbitrary point in
00034 //               the sequence, you can construct a task sequence whose
00035 //               duration changes during playback.
00036 ////////////////////////////////////////////////////////////////////
00037 class EXPCL_PANDA_EVENT AsyncTaskSequence : public AsyncTask, public AsyncTaskCollection {
00038 PUBLISHED:
00039   AsyncTaskSequence(const string &name);
00040   virtual ~AsyncTaskSequence();
00041   ALLOC_DELETED_CHAIN(AsyncTaskSequence);
00042 
00043   INLINE void set_repeat_count(int repeat_count);
00044   INLINE int get_repeat_count() const;
00045 
00046   INLINE int get_current_task_index() const;
00047 
00048 protected:
00049   virtual bool is_runnable();
00050   virtual DoneStatus do_task();
00051   virtual void upon_birth(AsyncTaskManager *manager);
00052   virtual void upon_death(AsyncTaskManager *manager, bool clean_exit);
00053 
00054 private:
00055   void set_current_task(AsyncTask *task, bool clean_exit);
00056 
00057   int _repeat_count;
00058   int _task_index;
00059   PT(AsyncTask) _current_task;
00060 
00061 public:
00062   static TypeHandle get_class_type() {
00063     return _type_handle;
00064   }
00065   static void init_type() {
00066     AsyncTask::init_type();
00067     register_type(_type_handle, "AsyncTaskSequence",
00068                   AsyncTask::get_class_type());
00069   }
00070   virtual TypeHandle get_type() const {
00071     return get_class_type();
00072   }
00073   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00074 
00075 private:
00076   static TypeHandle _type_handle;
00077 };
00078 
00079 #include "asyncTaskSequence.I"
00080 
00081 #endif
00082 
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