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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/film_viewer.h
* @brief A wx widget to view `thumbnails' of a Film.
*/
#include <wx/wx.h>
#include "lib/film.h"
class wxToggleButton;
class FFmpegPlayer;
class Image;
class RGBPlusAlphaImage;
/** @class FilmViewer
* @brief A wx widget to view a preview of a Film.
*
* The film takes the following path through the viewer:
*
* 1. fetch_next_frame() asks our _player to decode some data. If it does, process_video()
* will be called.
*
* 2. process_video() takes the image from the player (_frame).
*
* 3. fetch_next_frame() calls _panel->Refresh() and _panel->Update() which results in
* paint_panel() being called; this creates frame_bitmap from _frame and blits it to the display.
*
* fetch_current_frame_again() asks the player to re-emit its current frame on the next pass(), and then
* starts from step #1.
*/
class FilmViewer : public wxPanel
{
public:
FilmViewer (boost::shared_ptr<Film>, wxWindow *);
void set_film (boost::shared_ptr<Film>);
private:
void paint_panel ();
void panel_sized (wxSizeEvent &);
void slider_moved ();
void play_clicked ();
void timer ();
void process_video (boost::shared_ptr<const Image>, Eyes, Time);
void calculate_sizes ();
void check_play_state ();
void fetch_current_frame_again ();
void fetch_next_frame ();
void active_jobs_changed (bool);
void back_clicked ();
void forward_clicked ();
void player_changed (bool);
void set_position_text (Time);
boost::shared_ptr<Film> _film;
boost::shared_ptr<Player> _player;
wxSizer* _v_sizer;
wxPanel* _panel;
wxSlider* _slider;
wxButton* _back_button;
wxButton* _forward_button;
wxStaticText* _frame_number;
wxStaticText* _timecode;
wxToggleButton* _play_button;
wxTimer _timer;
boost::shared_ptr<const Image> _frame;
bool _got_frame;
/** Size of our output (including padding if we have any) */
libdcp::Size _out_size;
/** Size of the panel that we have available */
libdcp::Size _panel_size;
std::list<std::pair<boost::shared_ptr<const Image>, Time> > _queue;
};
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