/* === S Y N F I G ========================================================= */

/*!	\file state_rotate.cpp

**	\brief Template File

**

**	$Id$

**

**	\legal

**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley

**  Copyright (c) 2008 Chris Moore

**  Copyright (c) 2010 Carlos Lรณpez

**

**	This package 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 package 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.

**	\endlegal

*/

/* ========================================================================= */

/* === H E A D E R S ======================================================= */

#ifdef USING_PCH

#	include "pch.h"

#else

#ifdef HAVE_CONFIG_H

#	include <config.h></config.h>

#endif

#include <gtkmm dialog.h=""></gtkmm>

#include <gtkmm entry.h=""></gtkmm>

#include <synfig valuenode_dynamiclist.h=""></synfig>

#include <synfigapp action_system.h=""></synfigapp>

#include "state_rotate.h"

#include "state_normal.h"

#include "canvasview.h"

#include "workarea.h"

#include "app.h"

#include <synfigapp action.h=""></synfigapp>

#include "event_mouse.h"

#include "event_layerclick.h"

#include "docks/dock_toolbox.h"

#include "docks/dialog_tooloptions.h"

#include <gtkmm optionmenu.h=""></gtkmm>

#include "duck.h"

#include <synfig angle.h=""></synfig>

#include <synfigapp main.h=""></synfigapp>

#include "general.h"

#endif

/* === U S I N G =========================================================== */

using namespace std;

using namespace etl;

using namespace synfig;

using namespace studio;

/* === M A C R O S ========================================================= */

#ifndef EPSILON

#define EPSILON	0.0000001

#endif

/* === G L O B A L S ======================================================= */

StateRotate studio::state_rotate;

/* === C L A S S E S & S T R U C T S ======================================= */

class DuckDrag_Rotate : public DuckDrag_Base

{

	synfig::Vector last_rotate;

	synfig::Vector drag_offset;

	synfig::Vector center;

	synfig::Vector snap;

	Angle original_angle;

	Real original_mag;

	std::vector<synfig::vector> positions;</synfig::vector>

	bool bad_drag;

	bool move_only;

public:

	etl::handle<canvasview> canvas_view_;</canvasview>

	bool use_magnitude;

	DuckDrag_Rotate();

	void begin_duck_drag(Duckmatic* duckmatic, const synfig::Vector& begin);

	bool end_duck_drag(Duckmatic* duckmatic);

	void duck_drag(Duckmatic* duckmatic, const synfig::Vector& vector);

	etl::handle<synfigapp::canvasinterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}</synfigapp::canvasinterface>

};

class studio::StateRotate_Context : public sigc::trackable

{

	etl::handle<canvasview> canvas_view_;</canvasview>

	CanvasView::IsWorking is_working;

	synfigapp::Settings& settings;

	etl::handle<duckdrag_rotate> duck_dragger_;</duckdrag_rotate>

	Gtk::Table options_table;

	Gtk::CheckButton checkbutton_scale;

public:

	bool get_scale_flag()const { return checkbutton_scale.get_active(); }

	void set_scale_flag(bool x) { return checkbutton_scale.set_active(x); refresh_scale_flag(); }

	Smach::event_result event_stop_handler(const Smach::event& x);

	Smach::event_result event_refresh_tool_options(const Smach::event& x);

	void refresh_tool_options();

	void refresh_scale_flag() { if(duck_dragger_)duck_dragger_->use_magnitude=get_scale_flag(); }

	StateRotate_Context(CanvasView* canvas_view);

	~StateRotate_Context();

	const etl::handle<canvasview>& get_canvas_view()const{return canvas_view_;}</canvasview>

	etl::handle<synfigapp::canvasinterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}</synfigapp::canvasinterface>

	synfig::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}

	WorkArea * get_work_area()const{return canvas_view_->get_work_area();}

	void load_settings();

	void save_settings();

};	// END of class StateRotate_Context

/* === M E T H O D S ======================================================= */

StateRotate::StateRotate():

	Smach::state<staterotate_context>("rotate")</staterotate_context>

{

	insert(event_def(EVENT_REFRESH_TOOL_OPTIONS,&StateRotate_Context::event_refresh_tool_options));

	insert(event_def(EVENT_STOP,&StateRotate_Context::event_stop_handler));

}

StateRotate::~StateRotate()

{

}

void

StateRotate_Context::load_settings()

{

	try

	{

		synfig::ChangeLocale change_locale(LC_NUMERIC, "C");

		String value;

		if(settings.get_value("rotate.scale",value) && value=="0")

			set_scale_flag(false);

		else

			set_scale_flag(true);

	}

	catch(...)

	{

		synfig::warning("State Rotate: Caught exception when attempting to load settings.");

	}

}

void

StateRotate_Context::save_settings()

{

	try

	{

		synfig::ChangeLocale change_locale(LC_NUMERIC, "C");

		settings.set_value("rotate.scale",get_scale_flag()?"1":"0");

	}

	catch(...)

	{

		synfig::warning("State Rotate: Caught exception when attempting to save settings.");

	}

}

StateRotate_Context::StateRotate_Context(CanvasView* canvas_view):

	canvas_view_(canvas_view),

	is_working(*canvas_view),

	settings(synfigapp::Main::get_selected_input_device()->settings()),

	duck_dragger_(new DuckDrag_Rotate()),

	checkbutton_scale(_("Allow Scale"))

{

	duck_dragger_->canvas_view_=get_canvas_view();

	// Set up the tool options dialog

	options_table.attach(*manage(new Gtk::Label(_("Rotate Tool"))),	0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);

	options_table.attach(checkbutton_scale,							0, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);

	checkbutton_scale.signal_toggled().connect(sigc::mem_fun(*this,&StateRotate_Context::refresh_scale_flag));

	options_table.show_all();

	refresh_tool_options();

	//App::dialog_tool_options->set_widget(options_table);

	App::dialog_tool_options->present();

	get_work_area()->set_allow_layer_clicks(true);

	get_work_area()->set_duck_dragger(duck_dragger_);

	get_work_area()->set_cursor(Gdk::EXCHANGE);

//	get_work_area()->reset_cursor();

	App::dock_toolbox->refresh();

	load_settings();

	refresh_scale_flag();

}

void

StateRotate_Context::refresh_tool_options()

{

	App::dialog_tool_options->clear();

	App::dialog_tool_options->set_widget(options_table);

	App::dialog_tool_options->set_local_name(_("Rotate Tool"));

	App::dialog_tool_options->set_name("rotate");

}

Smach::event_result

StateRotate_Context::event_refresh_tool_options(const Smach::event& /*x*/)

{

	refresh_tool_options();

	return Smach::RESULT_ACCEPT;

}

Smach::event_result

StateRotate_Context::event_stop_handler(const Smach::event& /*x*/)

{

	throw &state_normal;

	return Smach::RESULT_OK;

}

StateRotate_Context::~StateRotate_Context()

{

	save_settings();

	get_work_area()->clear_duck_dragger();

	get_work_area()->reset_cursor();

	App::dialog_tool_options->clear();

	App::dock_toolbox->refresh();

}

DuckDrag_Rotate::DuckDrag_Rotate()

{

	use_magnitude=true;

}

void

DuckDrag_Rotate::begin_duck_drag(Duckmatic* duckmatic, const synfig::Vector& offset)

{

	last_rotate=Vector(1,1);

	const DuckList selected_ducks(duckmatic->get_selected_ducks());

	DuckList::const_iterator iter;

/*

	if(duckmatic->get_selected_ducks().size()<2)

	{

		bad_drag=true;

		return;

	}

*/

	bad_drag=false;

		drag_offset=duckmatic->find_duck(offset)->get_trans_point();

		//snap=drag_offset-duckmatic->snap_point_to_grid(drag_offset);

		//snap=offset-drag_offset;

		snap=Vector(0,0);

	// Calculate center

	Point vmin(100000000,100000000);

	Point vmax(-100000000,-100000000);

	//std::set<etl::handle<duck> >::iterator iter;</etl::handle<duck>

	positions.clear();

	int i;

	for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)

	{

		Point p((*iter)->get_trans_point());

		vmin[0]=min(vmin[0],p[0]);

		vmin[1]=min(vmin[1],p[1]);

		vmax[0]=max(vmax[0],p[0]);

		vmax[1]=max(vmax[1],p[1]);

		positions.push_back(p);

	}

	center=(vmin+vmax)*0.5;

	if((vmin-vmax).mag()<=EPSILON)

		move_only=true;

	else

		move_only=false;

	synfig::Vector vect(offset-center);

	original_angle=Angle::tan(vect[1],vect[0]);

	original_mag=vect.mag();

}

void

DuckDrag_Rotate::duck_drag(Duckmatic* duckmatic, const synfig::Vector& vector)

{

	if(bad_drag)

		return;

	//std::set<etl::handle<duck> >::iterator iter;</etl::handle<duck>

	synfig::Vector vect(duckmatic->snap_point_to_grid(vector)-center+snap);

	const DuckList selected_ducks(duckmatic->get_selected_ducks());

	DuckList::const_iterator iter;

	if(move_only)

	{

		int i;

		for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)

		{

			if((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION)continue;

			Vector p(positions[i]);

			p[0]+=vect[0];

			p[1]+=vect[1];

			(*iter)->set_trans_point(p);

		}

		for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)

		{

			if(!((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION))continue;

			Vector p(positions[i]);

			p[0]+=vect[0];

			p[1]+=vect[1];

			(*iter)->set_trans_point(p);

		}

		return;

	}

	Angle::tan angle(vect[1],vect[0]);

	angle=original_angle-angle;

	Real mag(vect.mag()/original_mag);

	Real sine(Angle::sin(angle).get());

	Real cosine(Angle::cos(angle).get());

	int i;

	for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)

	{

		if((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION)continue;

		Vector x(positions[i]-center),p;

		p[0]=cosine*x[0]+sine*x[1];

		p[1]=-sine*x[0]+cosine*x[1];

		if(use_magnitude)p*=mag;

		p+=center;

		(*iter)->set_trans_point(p);

	}

	for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)

	{

		if(!((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION))continue;

		Vector x(positions[i]-center),p;

		p[0]=cosine*x[0]+sine*x[1];

		p[1]=-sine*x[0]+cosine*x[1];

		if(use_magnitude)p*=mag;

		p+=center;

		(*iter)->set_trans_point(p);

	}

	last_rotate=vect;

	//snap=Vector(0,0);

}

bool

DuckDrag_Rotate::end_duck_drag(Duckmatic* duckmatic)

{

	if(bad_drag)return false;

	if(move_only)

	{

		synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Move Handle"));

		duckmatic->signal_edited_selected_ducks();

		return true;

	}

	synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Rotate Handle"));

	if((last_rotate-Vector(1,1)).mag()>0.0001)

	{

		duckmatic->signal_edited_selected_ducks();

		return true;

	}

	else

	{

		duckmatic->signal_user_click_selected_ducks(0);

		return false;

	}

}