1 files changed, 224 insertions, 0 deletions
diff --git a/src/gtk/film_viewer.cc b/src/gtk/film_viewer.cc
new file mode 100644
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+++ b/src/gtk/film_viewer.cc
@@ -0,0 +1,224 @@
+/*
+    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.cc
+ *  @brief A GTK widget to view `thumbnails' of a Film.
+ */
+
+#include <iostream>
+#include <iomanip>
+#include "lib/film.h"
+#include "lib/format.h"
+#include "lib/util.h"
+#include "lib/thumbs_job.h"
+#include "lib/job_manager.h"
+#include "lib/film_state.h"
+#include "lib/options.h"
+#include "film_viewer.h"
+
+using namespace std;
+using namespace boost;
+
+FilmViewer::FilmViewer (Film* f)
+	: _film (f)
+	, _update_button ("Update")
+{
+	_scroller.add (_image);
+
+	Gtk::HBox* controls = manage (new Gtk::HBox);
+	controls->set_spacing (6);
+	controls->pack_start (_update_button, false, false);
+	controls->pack_start (_position_slider);
+	
+	_vbox.pack_start (_scroller, true, true);
+	_vbox.pack_start (*controls, false, false);
+	_vbox.set_border_width (12);
+
+	_update_button.signal_clicked().connect (sigc::mem_fun (*this, &FilmViewer::update_thumbs));
+
+	_position_slider.set_digits (0);
+	_position_slider.signal_format_value().connect (sigc::mem_fun (*this, &FilmViewer::format_position_slider_value));
+	_position_slider.signal_value_changed().connect (sigc::mem_fun (*this, &FilmViewer::position_slider_changed));
+
+	_scroller.signal_size_allocate().connect (sigc::mem_fun (*this, &FilmViewer::scroller_size_allocate));
+
+	set_film (_film);
+}
+
+void
+FilmViewer::load_thumbnail (int n)
+{
+	if (_film == 0 || _film->num_thumbs() <= n) {
+		return;
+	}
+
+	int const left = _film->left_crop ();
+	int const right = _film->right_crop ();
+	int const top = _film->top_crop ();
+	int const bottom = _film->bottom_crop ();
+
+	_pixbuf = Gdk::Pixbuf::create_from_file (_film->thumb_file (n));
+
+	int const cw = _film->size().width - left - right;
+	int const ch = _film->size().height - top - bottom;
+	_cropped_pixbuf = Gdk::Pixbuf::create_subpixbuf (_pixbuf, left, top, cw, ch);
+	update_scaled_pixbuf ();
+	_image.set (_scaled_pixbuf);
+}
+
+void
+FilmViewer::reload_current_thumbnail ()
+{
+	load_thumbnail (_position_slider.get_value ());
+}
+
+void
+FilmViewer::position_slider_changed ()
+{
+	reload_current_thumbnail ();
+}
+
+string
+FilmViewer::format_position_slider_value (double v) const
+{
+	stringstream s;
+
+	if (_film && int (v) < _film->num_thumbs ()) {
+		int const f = _film->thumb_frame (int (v));
+		s << f << " " << seconds_to_hms (f / _film->frames_per_second ());
+	} else {
+		s << "-";
+	}
+	
+	return s.str ();
+}
+
+void
+FilmViewer::film_changed (Film::Property p)
+{
+	if (p == Film::LEFT_CROP || p == Film::RIGHT_CROP || p == Film::TOP_CROP || p == Film::BOTTOM_CROP) {
+		reload_current_thumbnail ();
+	} else if (p == Film::THUMBS) {
+		if (_film && _film->num_thumbs() > 1) {
+			_position_slider.set_range (0, _film->num_thumbs () - 1);
+		} else {
+			_image.clear ();
+			_position_slider.set_range (0, 1);
+		}
+		
+		_position_slider.set_value (0);
+		reload_current_thumbnail ();
+	} else if (p == Film::FORMAT) {
+		reload_current_thumbnail ();
+	} else if (p == Film::CONTENT) {
+		setup_visibility ();
+		update_thumbs ();
+	}
+}
+
+void
+FilmViewer::set_film (Film* f)
+{
+	_film = f;
+
+	_update_button.set_sensitive (_film != 0);
+	
+	if (!_film) {
+		_image.clear ();
+		return;
+	}
+
+	_film->Changed.connect (sigc::mem_fun (*this, &FilmViewer::film_changed));
+
+	film_changed (Film::THUMBS);
+}
+
+pair<int, int>
+FilmViewer::scaled_pixbuf_size () const
+{
+	if (_film == 0) {
+		return make_pair (0, 0);
+	}
+	
+	int const cw = _film->size().width - _film->left_crop() - _film->right_crop(); 
+	int const ch = _film->size().height - _film->top_crop() - _film->bottom_crop();
+
+	float ratio = 1;
+	if (_film->format()) {
+		ratio = _film->format()->ratio_as_float() * ch / cw;
+	}
+
+	Gtk::Allocation const a = _scroller.get_allocation ();
+	float const zoom = min (float (a.get_width()) / (cw * ratio), float (a.get_height()) / cw);
+	return make_pair (cw * zoom * ratio, ch * zoom);
+}
+	
+void
+FilmViewer::update_scaled_pixbuf ()
+{
+	pair<int, int> const s = scaled_pixbuf_size ();
+
+	if (s.first > 0 && s.second > 0 && _cropped_pixbuf) {
+		_scaled_pixbuf = _cropped_pixbuf->scale_simple (s.first, s.second, Gdk::INTERP_HYPER);
+		_image.set (_scaled_pixbuf);
+	}
+}
+
+void
+FilmViewer::update_thumbs ()
+{
+	if (!_film) {
+		return;
+	}
+
+	_film->update_thumbs_pre_gui ();
+
+	shared_ptr<const FilmState> s = _film->state_copy ();
+	shared_ptr<Options> o (new Options (s->dir ("thumbs"), ".tiff", ""));
+	o->out_size = _film->size ();
+	o->apply_crop = false;
+	o->decode_audio = false;
+	o->decode_video_frequency = 128;
+	
+	shared_ptr<Job> j (new ThumbsJob (s, o, _film->log ()));
+	j->Finished.connect (sigc::mem_fun (_film, &Film::update_thumbs_post_gui));
+	JobManager::instance()->add (j);
+}
+
+void
+FilmViewer::scroller_size_allocate (Gtk::Allocation a)
+{
+	if (a.get_width() != _last_scroller_allocation.get_width() || a.get_height() != _last_scroller_allocation.get_height()) {
+		update_scaled_pixbuf ();
+	}
+	
+	_last_scroller_allocation = a;
+}
+
+void
+FilmViewer::setup_visibility ()
+{
+	if (!_film) {
+		return;
+	}
+
+	ContentType const c = _film->content_type ();
+	_update_button.property_visible() = (c == VIDEO);
+	_position_slider.property_visible() = (c == VIDEO);
+}