/*
    Copyright (C) 2002 Paul Davis

    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.

*/

#ifndef __ardour_gtk_gain_meter_h__
#define __ardour_gtk_gain_meter_h__

#include <vector>
#include <map>

#include <gtkmm/box.h>
#include <gtkmm/adjustment.h>
#include <gtkmm/frame.h>
#include <gtkmm/eventbox.h>
#include <gtkmm/button.h>
#include <gtkmm/table.h>
#include <gtkmm/drawingarea.h>
#include <gdkmm/colormap.h>

#include "pbd/signals.h"

#include "ardour/chan_count.h"
#include "ardour/types.h"
#include "ardour/session_handle.h"

#include "ardour_button.h"

#include "gtkmm2ext/click_box.h"
#include "gtkmm2ext/focus_entry.h"
#include "gtkmm2ext/slider_controller.h"

#include "enums.h"
#include "level_meter.h"

namespace ARDOUR {
	class IO;
	class GainControl;
	class Session;
	class Route;
	class RouteGroup;
	class PeakMeter;
	class Amp;
	class Automatable;
}
namespace Gtkmm2ext {
	class FastMeter;
}
namespace Gtk {
	class Menu;
}

enum MeterPointChangeTarget {
	MeterPointChangeAll,
	MeterPointChangeGroup,
	MeterPointChangeSingle
};

class GainMeterBase : virtual public sigc::trackable, ARDOUR::SessionHandlePtr
{
  public:
        GainMeterBase (ARDOUR::Session*, bool horizontal, int, int);
	virtual ~GainMeterBase ();

	virtual void set_controls (boost::shared_ptr<ARDOUR::Route> route,
				   boost::shared_ptr<ARDOUR::PeakMeter> meter,
	                           boost::shared_ptr<ARDOUR::Amp> amp,
	                           boost::shared_ptr<ARDOUR::GainControl> control);

	void update_gain_sensitive ();
	void update_meters ();

	const ARDOUR::ChanCount meter_channels () const;

	void effective_gain_display ();
	void set_width (Width, int len=0);
	void set_meter_strip_name (const char * name);
	void set_fader_name (const char * name);

	virtual void setup_meters (int len=0);
	virtual void set_type (ARDOUR::MeterType);

	boost::shared_ptr<PBD::Controllable> get_controllable();

	LevelMeterHBox& get_level_meter() const { return *level_meter; }
	Gtkmm2ext::SliderController& get_gain_slider() const { return *gain_slider; }

	/** Emitted in the GUI thread when a button is pressed over the level meter;
	 *  return true if the event is handled.
	 */
	PBD::Signal1<bool, GdkEventButton *> LevelMeterButtonPress;

	static std::string astate_string (ARDOUR::AutoState);
	static std::string short_astate_string (ARDOUR::AutoState);
	static std::string _astate_string (ARDOUR::AutoState, bool);

	static std::string astyle_string (ARDOUR::AutoStyle);
	static std::string short_astyle_string (ARDOUR::AutoStyle);
	static std::string _astyle_string (ARDOUR::AutoStyle, bool);

  protected:

	friend class MixerStrip;
	friend class MeterStrip;
	friend class RouteTimeAxisView;
	boost::shared_ptr<ARDOUR::Route> _route;
	boost::shared_ptr<ARDOUR::PeakMeter> _meter;
	boost::shared_ptr<ARDOUR::Amp> _amp;
	boost::shared_ptr<ARDOUR::GainControl> _control;
	std::vector<sigc::connection> connections;
	PBD::ScopedConnectionList model_connections;

	bool ignore_toggle;
	bool next_release_selects;

	Gtkmm2ext::SliderController *gain_slider;
	Gtk::Adjustment              gain_adjustment;
	Gtkmm2ext::FocusEntry        gain_display;
	Gtkmm2ext::FocusEntry        peak_display;
//	Gtk::Button                  peak_display;
	Gtk::DrawingArea             meter_metric_area;
	Gtk::DrawingArea             meter_ticks1_area;
	Gtk::DrawingArea             meter_ticks2_area;
	LevelMeterHBox              *level_meter;

	sigc::connection gain_watching;

	ArdourButton gain_automation_style_button;
	ArdourButton gain_automation_state_button;

	Gtk::Menu gain_astate_menu;
	Gtk::Menu gain_astyle_menu;

	ArdourButton meter_point_button;

	Gtk::Menu meter_point_menu;

	void set_gain_astate (ARDOUR::AutoState);
	bool gain_astate_propagate;
	static sigc::signal<void, ARDOUR::AutoState> ChangeGainAutomationState;

	gint gain_automation_style_button_event (GdkEventButton *);
	gint gain_automation_state_button_event (GdkEventButton *);
	gint pan_automation_style_button_event (GdkEventButton *);
	gint pan_automation_state_button_event (GdkEventButton *);

	void gain_automation_state_changed();
	void gain_automation_style_changed();

	void setup_gain_adjustment ();
	Width _width;

	void show_gain ();
	void gain_activated ();
	bool gain_focused (GdkEventFocus*);

	float max_peak;

	void fader_moved ();
	void gain_changed ();

	void meter_point_clicked (ARDOUR::MeterPoint);
	void gain_unit_changed ();

	virtual void hide_all_meters ();

	gint meter_button_press (GdkEventButton*, uint32_t);

	bool peak_button_release (GdkEventButton*);
	bool gain_key_press (GdkEventKey*);

	Gtk::Menu* meter_menu;
	void popup_meter_menu (GdkEventButton*);

	void amp_stop_touch ();
	void amp_start_touch ();

	void set_route_group_meter_point (ARDOUR::Route&, ARDOUR::MeterPoint);
	void set_meter_point (ARDOUR::Route&, ARDOUR::MeterPoint);
	gint meter_press (GdkEventButton*);
	ARDOUR::MeterPoint old_meter_point;

	MeterPointChangeTarget meter_point_change_target;

	void parameter_changed (const char*);

	void reset_peak_display ();
	void reset_route_peak_display (ARDOUR::Route*);
	void reset_group_peak_display (ARDOUR::RouteGroup*);

	void redraw_metrics ();
	void on_theme_changed ();
	void color_handler(bool);
	ARDOUR::DataType _data_type;
	ARDOUR::ChanCount _previous_amp_output_streams;

private:

	bool level_meter_button_press (GdkEventButton *);
	PBD::ScopedConnection _level_meter_connection;
};

class GainMeter : public GainMeterBase, public Gtk::VBox
{
  public:
         GainMeter (ARDOUR::Session*, int);
	virtual ~GainMeter ();

	virtual void set_controls (boost::shared_ptr<ARDOUR::Route> route,
				   boost::shared_ptr<ARDOUR::PeakMeter> meter,
	                           boost::shared_ptr<ARDOUR::Amp> amp,
				   boost::shared_ptr<ARDOUR::GainControl> control);

	int get_gm_width ();
	void setup_meters (int len=0);
	void set_type (ARDOUR::MeterType);
	void route_active_changed ();

  protected:
	void hide_all_meters ();

	gint meter_metrics_expose (GdkEventExpose *);
	gint meter_ticks1_expose (GdkEventExpose *);
	gint meter_ticks2_expose (GdkEventExpose *);
	void on_style_changed (const Glib::RefPtr<Gtk::Style>&);

  private:

	void meter_configuration_changed (ARDOUR::ChanCount);
	void meter_type_changed (ARDOUR::MeterType);

	Gtk::HBox  gain_display_box;
	Gtk::HBox  fader_box;
	Gtk::VBox  fader_vbox;
	Gtk::HBox  hbox;
	Gtk::HBox  meter_hbox;
	Gtk::Alignment fader_alignment;
	Gtk::Alignment meter_alignment;
	std::vector<ARDOUR::DataType> _types;
};

#endif /* __ardour_gtk_gain_meter_h__ */