/*
 *	subtitle editor
 *
 *	http://kitone.free.fr/subtitleeditor/
 *
 *	Copyright @ 2005-2006, kitone
 *
 *	Contact: kitone at free dot fr
 *
 *	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., 59 Temple Place, Suite 330, Boston, MA	02111-1307	USA
 *
 *	See gpl.txt for more information regarding the GNU General Public License.
 *
 *
 *	\file
 *	\brief 
 *	\author kitone (kitone at free dot fr)
 */


#include "DialogScale.h"
#include "utility.h"

/*
 *
 */
DialogScale::DialogScale(BaseObjectType* cobject, const Glib::RefPtr<Gnome::Glade::Xml>& refGlade)
:Gtk::Dialog(cobject)
{
	refGlade->get_widget("spinSource1", m_spinSource1);
	refGlade->get_widget("spinSource2", m_spinSource2);
	refGlade->get_widget("entryDest1", m_entryDest1);
	refGlade->get_widget("entryDest2", m_entryDest2);

	// default values
	m_entryDest1->set_text(SubtitleTime::null());
	m_entryDest2->set_text(SubtitleTime::null());
	
	m_spinSource1->signal_value_changed().connect(
			sigc::mem_fun(*this, &DialogScale::on_spin1_changed));
	
	m_spinSource2->signal_value_changed().connect(
			sigc::mem_fun(*this, &DialogScale::on_spin2_changed));

	m_entryDest1->signal_activate().connect(
			sigc::mem_fun(*this, &DialogScale::on_entry1_changed));
	
	m_entryDest2->signal_activate().connect(
			sigc::mem_fun(*this, &DialogScale::on_entry2_changed));
}

/*
 *
 */
void DialogScale::execute()
{
	Document *doc = SE::getInstance()->getDocument();
	g_return_if_fail(doc);

	
	m_subtitleModel = doc->get_subtitle_model();
	
	int min = 1;
	
	int max = m_subtitleModel->getSize();
	
	m_spinSource1->set_range(min, max);
	m_spinSource2->set_range(min, max);
	
	m_spinSource1->set_value(min);
	m_spinSource2->set_value(max);

	show();
	
	if( run() == Gtk::RESPONSE_OK)
	{
		SubtitleColumnRecorder column;
		// on recupere l'emplacement du debut et de la fin
		unsigned int num1 = (unsigned int)m_spinSource1->get_value();
		unsigned int num2 = (unsigned int)m_spinSource2->get_value();

		// on recupere le temps pour le debut et la fin
		SubtitleModifier it1(m_subtitleModel->find(num1));
		SubtitleModifier it2(m_subtitleModel->find(num2));

		SubtitleTime src1 = it1.get_start();
		SubtitleTime src2 = it2.get_start();
		// on recupere la nouvelle position voulu pour le debut et la fin
		SubtitleTime dest1(m_entryDest1->get_text());
		SubtitleTime dest2(m_entryDest2->get_text());
		
		// on deplace src1 a dest1 et src2 a dest2
		scale(src1,dest1, src2,dest2);
	}

	hide();
}

/*
 *
 */
void DialogScale::on_spin1_changed()
{
	unsigned int i = (unsigned int)m_spinSource1->get_value();

	SubtitleModifier subtitle(m_subtitleModel->find(i));
	if(subtitle)
	{
		m_entryDest1->set_text(subtitle.get_start().str());
	}
}

/*
 *
 */
void DialogScale::on_spin2_changed()
{
	unsigned int i = (unsigned int)m_spinSource2->get_value();

	SubtitleModifier subtitle(m_subtitleModel->find(i));
	if(subtitle)
	{
		m_entryDest2->set_text(subtitle.get_start().str());
	}
}

/*
 *
 */
void DialogScale::on_entry1_changed()
{
	Glib::ustring text = m_entryDest1->get_text();
	if(SubtitleTime::validate(text) == false)
		m_entryDest1->set_text(SubtitleTime::null());
}

/*
 *
 */
void DialogScale::on_entry2_changed()
{
	Glib::ustring text = m_entryDest2->get_text();
	if(SubtitleTime::validate(text) == false)
		m_entryDest2->set_text(SubtitleTime::null());
}

/*
 *
 */
double DialogScale::calcul_scale(long source1, long dest1, long source2, long dest2)
{
	return (double)(((dest2 - source2) - (dest1 - source1)) / (double)(source2 - source1));
}

/*
 *
 */
SubtitleTime DialogScale::calcul(const SubtitleTime &source, double scale, 
										const SubtitleTime &sourcedisp, const SubtitleTime &destdisp)
{
	SubtitleTime res;
	
	res = (source + (((source - sourcedisp) * scale) + (destdisp - sourcedisp)));
	res.initTotalMSecs();
	return res;
}

/*
 *	Scale
 */
void DialogScale::scale(const SubtitleTime &source1, const SubtitleTime &dest1,
				const SubtitleTime &source2, const SubtitleTime &dest2)
{
	double scale = calcul_scale(
			getMSecs(source1), getMSecs(dest1),
			getMSecs(source2), getMSecs(dest2));
	
	Gtk::TreeNodeChildren rows = SE::getInstance()->getDocument()->get_subtitle_model()->children();

	for(Gtk::TreeIter it = rows.begin(); it; ++it)
	{
		SubtitleModifier subtitle(it);

		SubtitleTime start = subtitle.get_start();
		SubtitleTime end = subtitle.get_end();
		
		start	= calcul(start, scale, source1, dest1);
		end		= calcul(end, scale, source1, dest1);
		
		subtitle.set_start(start);
		subtitle.set_end(end);
	}
}