/* This file is part of FlowCanvas.
 * Copyright (C) 2007-2009 David Robillard <http://drobilla.net>
 *
 * FlowCanvas 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.
 *
 * FlowCanvas 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 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.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
 */

#ifndef FLOWCANVAS_PORT_HPP
#define FLOWCANVAS_PORT_HPP

#include <stdint.h>

#include <algorithm>
#include <list>
#include <string>
#include <vector>

#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>

#include <libgnomecanvasmm.h>

#include "Connectable.hpp"

namespace FlowCanvas {

class Connection;
class Module;


static const int PORT_LABEL_SIZE = 8000; // in thousandths of a point


/** A port on a Module.
 *
 * This is a group that contains both the label and rectangle for a port.
 *
 * \ingroup FlowCanvas
 */
class Port : public Gnome::Canvas::Group, public Connectable
{
public:
	Port(boost::shared_ptr<Module> module,
	     const std::string&        name,
	     bool                      is_input,
	     uint32_t                  color);

	virtual ~Port();

	void disconnect_all();

	virtual Gnome::Art::Point src_connection_point();
	virtual Gnome::Art::Point dst_connection_point(const Gnome::Art::Point& src);
	virtual Gnome::Art::Point connection_point_vector(double dx, double dy);

	boost::weak_ptr<Module> module() const { return _module; }

	void set_fill_color(uint32_t c) { _rect->property_fill_color_rgba() = c; }

	void show_label(bool b);
	void set_selected(bool b);
	bool selected() const { return _selected; }

	void set_highlighted(bool highlight,
	                     bool highlight_parent=true,
	                     bool highlight_connections=true,
	                     bool raise_connections=true);

	void zoom(float z);

	void popup_menu(guint button, guint32 activate_time) {
		if ( ! _menu)
			create_menu();
		if (_menu)
			_menu->popup(button, activate_time);
	}

	virtual void create_menu();
	void         set_menu(Gtk::Menu* m);

	Gtk::Menu* menu() const { return _menu; }

	double width() const { return _width; }
	void   set_width(double w);
	void   set_height(double h);

	double border_width() const { return _border_width; }
	void   set_border_width(double w);

	double natural_width() const;

	const std::string& name() const { return _name; }
	virtual void       set_name(const std::string& n);

	bool     is_input()  const { return _is_input; }
	bool     is_output() const { return !_is_input; }
	uint32_t color()     const { return _color; }
	double   height()    const { return _height; }

	virtual bool is_toggled() const { return _toggled; }
	virtual void set_toggled(bool b) { _toggled = b; }
	virtual void toggle(bool signal=true);

	virtual void set_control(float value, bool signal=true);
	virtual void set_control_min(float min);
	virtual void set_control_max(float max);

	float control_value() const { return _control ? _control->value : 0.0f; }
	float control_min()   const { return _control ? _control->min   : 0.0f; }
	float control_max()   const { return _control ? _control->max   : 1.0f; }

	void show_control();
	void hide_control();

	inline bool operator==(const std::string& name) { return (_name == name); }

	sigc::signal<void>       signal_renamed;
	sigc::signal<void,float> signal_control_changed;

protected:
	friend class Canvas;

	void on_menu_hide();

	boost::weak_ptr<Module> _module;
	std::string             _name;
	Gnome::Canvas::Text*    _label;
	Gnome::Canvas::Rect*    _rect;
	Gtk::Menu*              _menu;

	/** Port control value indicator "gauge" */
	struct Control {
		explicit Control(Gnome::Canvas::Rect* r)
			: rect(r)
			, value(0.0f)
			, min(0.0f)
			, max(1.0f)
			{}

		~Control() {
			delete rect;
		}
		
		Gnome::Canvas::Rect* rect;
		float                value;
		float                min;
		float                max;
	};

	Control* _control;
	
	double   _width;
	double   _height;
	double   _border_width;
	uint32_t _color;
	
	bool _is_input :1;
	bool _selected :1;
	bool _toggled  :1;
};

typedef std::vector<boost::shared_ptr<Port> > PortVector;


} // namespace FlowCanvas

#endif // FLOWCANVAS_PORT_HPP