level_meter.h

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/*
    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_track_meter_h__
#define __ardour_gtk_track_meter_h__

#include <vector>

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

#include <gtkmm2ext/click_box.h>
#include <gtkmm2ext/focus_entry.h>
#include <gtkmm2ext/slider_controller.h>
#include <gtkmm2ext/fastmeter.h>

#include "enums.h"

namespace ARDOUR {
        class Session;
        class PeakMeter;
}
namespace Gtk {
        class Menu;
}

class LevelMeterBase : public ARDOUR::SessionHandlePtr, virtual public sigc::trackable
{
  public:
        LevelMeterBase (ARDOUR::Session*, PBD::EventLoop::InvalidationRecord* ir,
                        Gtkmm2ext::FastMeter::Orientation o = Gtkmm2ext::FastMeter::Vertical);
        virtual ~LevelMeterBase ();

        virtual void set_meter (ARDOUR::PeakMeter* meter);

        void update_gain_sensitive ();

        float update_meters ();
        void update_meters_falloff ();
        void clear_meters (bool reset_highlight = true);
        void hide_meters ();
        void setup_meters (int len=0, int width=3, int thin=2);

        void set_type (ARDOUR::MeterType);
        ARDOUR::MeterType get_type () { return meter_type; }

        PBD::Signal1<bool, GdkEventButton *> ButtonPress;
        PBD::Signal1<bool, GdkEventButton *> ButtonRelease;
        PBD::Signal1<void, ARDOUR::MeterType> MeterTypeChanged;

        protected:
        virtual void mtr_pack(Gtk::Widget &w) = 0;
        virtual void mtr_remove(Gtk::Widget &w) = 0;

  private:
        PBD::EventLoop::InvalidationRecord* parent_invalidator;
        ARDOUR::PeakMeter* _meter;
        Gtkmm2ext::FastMeter::Orientation _meter_orientation;

        Width _width;

        struct MeterInfo {
            Gtkmm2ext::FastMeter *meter;
            gint16                width;
            int                   length;
            bool                  packed;
            float                 max_peak;

            MeterInfo() {
                    meter = 0;
                    width = 0;
                    length = 0;
                    packed = false;
                    max_peak = -INFINITY;
            }
        };

        guint16                regular_meter_width;
        int                    meter_length;
        guint16                thin_meter_width;
        std::vector<MeterInfo> meters;
        float                  max_peak;
        ARDOUR::MeterType      meter_type;
        ARDOUR::MeterType      visible_meter_type;
        uint32_t               visible_meter_count;

        PBD::ScopedConnection _configuration_connection;
        PBD::ScopedConnection _meter_type_connection;
        PBD::ScopedConnection _parameter_connection;

        void hide_all_meters ();
        bool meter_button_press (GdkEventButton *);
        bool meter_button_release (GdkEventButton *);

        void parameter_changed (std::string);
        void configuration_changed (ARDOUR::ChanCount in, ARDOUR::ChanCount out);
        void meter_type_changed (ARDOUR::MeterType);

        bool color_changed;
        void color_handler ();
};

class LevelMeterHBox : public LevelMeterBase, public Gtk::HBox
{
  public:
        LevelMeterHBox (ARDOUR::Session*);
        ~LevelMeterHBox();

        protected:
        void mtr_pack(Gtk::Widget &w);
        void mtr_remove(Gtk::Widget &w);
};

class LevelMeterVBox : public LevelMeterBase, public Gtk::VBox
{
  public:
        LevelMeterVBox (ARDOUR::Session*);
        ~LevelMeterVBox();

        protected:
        void mtr_pack(Gtk::Widget &w);
        void mtr_remove(Gtk::Widget &w);
};

#endif /* __ardour_gtk_track_meter_h__ */