meterbridge.h

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/*
 * Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2016 Paul Davis <paul@linuxaudiosystems.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 () const;
        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 (PBD::PropertyChange what_changed = ARDOUR::Properties::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) {
                        std::shared_ptr<ARDOUR::Route> a = ma.s->route();
                        std::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 ARDOUR::Stripable::Sorter (true) (a, b);
                }
        };
 
        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.
        mutable int m_root_x, m_root_y, m_width, m_height;
 
        void set_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;
 
        bool on_configure_event (GdkEventConfigure* conf);
};
 
#endif