meterbridge.h

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/*
    Copyright (C) 2012 Paul Davis
    Author: Robin Gareus

    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_meterbridge_h__
#define __ardour_meterbridge_h__

#include <glibmm/thread.h>

#include <gtkmm/box.h>
#include <gtkmm/scrolledwindow.h>
#include <gtkmm/label.h>
#include <gtkmm/window.h>

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

#include "pbd/stateful.h"
#include "pbd/signals.h"

#include "gtkmm2ext/visibility_tracker.h"

#include "meter_strip.h"

class Meterbridge :
        public Gtk::Window,
        public PBD::ScopedConnectionList,
        public ARDOUR::SessionHandlePtr,
        public Gtkmm2ext::VisibilityTracker
{
  public:
        static Meterbridge* instance();
        ~Meterbridge();

        void set_session (ARDOUR::Session *);

        XMLNode& get_state (void);
        int set_state (const XMLNode& );

        void show_window ();
        bool hide_window (GdkEventAny *ev);

  private:
        Meterbridge ();
        static Meterbridge* _instance;

        bool _visible;
        bool _show_busses;
        bool _show_master;
        bool _show_midi;

        Gtk::ScrolledWindow scroller;
        Gtk::HBox meterarea;
        Gtk::HBox global_hpacker;
        Gtk::VBox global_vpacker;

        gint start_updating ();
        gint stop_updating ();

        sigc::connection fast_screen_update_connection;
        void fast_update_strips ();

        void add_strips (ARDOUR::RouteList&);
        void remove_strip (MeterStrip *);

        void session_going_away ();
        void sync_order_keys ();
        void resync_order ();
        mutable Glib::Threads::Mutex _resync_mutex;

        struct MeterBridgeStrip {
                MeterStrip *s;
                bool visible;

                MeterBridgeStrip(MeterStrip *ss) {
                        s = ss;
                        visible = true;
                }
        };

        struct MeterOrderRouteSorter {
                bool operator() (struct MeterBridgeStrip ma, struct MeterBridgeStrip mb) {
                        boost::shared_ptr<ARDOUR::Route> a = ma.s->route();
                        boost::shared_ptr<ARDOUR::Route> b = mb.s->route();
                        if (a->is_master() || a->is_monitor()) {
                                /* "a" is a special route (master, monitor, etc), and comes
                                 * last in the mixer ordering
                                 */
                                return false;
                        } else if (b->is_master() || b->is_monitor()) {
                                /* everything comes before b */
                                return true;
                        }
                        return a->order_key () < b->order_key ();
                }
        };

        std::list<MeterBridgeStrip> strips;

        MeterStrip metrics_left;
        MeterStrip metrics_right;
        std::vector<MeterStrip *> _metrics;

        Gtk::VBox metrics_vpacker_left;
        Gtk::VBox metrics_vpacker_right;
        Gtk::HBox metrics_spacer_left;
        Gtk::HBox metrics_spacer_right;

        static const int32_t default_width = 600;
        static const int32_t default_height = 400;
        static const int max_height = 1200; // == 1024 + 148 + 16 + 12 see meter_strip.cc
        int cur_max_width;

        void update_title ();

        // for restoring window geometry.
        int m_root_x, m_root_y, m_width, m_height;

        void set_window_pos_and_size ();
        void get_window_pos_and_size ();

        bool on_key_press_event (GdkEventKey*);
        bool on_key_release_event (GdkEventKey*);
        bool on_scroll_event (GdkEventScroll*);

        void scroll_left ();
        void scroll_right ();

        void on_size_allocate (Gtk::Allocation&);
        void on_size_request (Gtk::Requisition*);

        void parameter_changed (std::string const & p);
        void on_theme_changed ();

        void on_scroll ();
        sigc::connection scroll_connection;

        int _mm_left, _mm_right;
        ARDOUR::MeterType _mt_left, _mt_right;
};

#endif