meter_strip.cc

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/*
    Copyright (C) 2013 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.
*/

#include <list>

#include <sigc++/bind.h>

#include "ardour/session.h"
#include "ardour/route.h"
#include "ardour/route_group.h"
#include "ardour/meter.h"

#include "ardour/audio_track.h"
#include "ardour/midi_track.h"

#include <gtkmm2ext/gtk_ui.h>
#include <gtkmm2ext/keyboard.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/rgb_macros.h>

#include "ardour_ui.h"
#include "global_signals.h"
#include "logmeter.h"
#include "gui_thread.h"
#include "ardour_window.h"
#include "utils.h"

#include "meterbridge.h"
#include "meter_strip.h"
#include "meter_patterns.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;
using namespace PBD;
using namespace Gtk;
using namespace Gtkmm2ext;
using namespace std;
using namespace ArdourMeter;

PBD::Signal1<void,MeterStrip*> MeterStrip::CatchDeletion;
PBD::Signal0<void> MeterStrip::MetricChanged;
PBD::Signal0<void> MeterStrip::ConfigurationChanged;

#define PX_SCALE(pxmin, dflt) rint(std::max((double)pxmin, (double)dflt * ARDOUR_UI::ui_scale))

MeterStrip::MeterStrip (int metricmode, MeterType mt)
        : AxisView(0)
        , RouteUI(0)
{
        level_meter = 0;
        _strip_type = 0;
        _tick_bar = 0;
        _metricmode = -1;
        metric_type = MeterPeak;

        mtr_vbox.set_spacing (PX_SCALE(2, 2));
        nfo_vbox.set_spacing (PX_SCALE(2, 2));
        peakbx.set_size_request (-1, PX_SCALE(14, 14));
        namebx.set_size_request (PX_SCALE(16, 18), PX_SCALE(32, 52));
        spacer.set_size_request (-1,0);

        set_metric_mode(metricmode, mt);

        meter_metric_area.set_size_request (PX_SCALE(25, 25), 10);
        meter_metric_area.signal_expose_event().connect (
                        sigc::mem_fun(*this, &MeterStrip::meter_metrics_expose));
        RedrawMetrics.connect (sigc::mem_fun(*this, &MeterStrip::redraw_metrics));

        meterbox.pack_start(meter_metric_area, true, false);

        mtr_vbox.pack_start (peakbx, false, false);
        mtr_vbox.pack_start (meterbox, true, true);
        mtr_vbox.pack_start (spacer, false, false);
        mtr_container.add(mtr_vbox);

        mtr_hsep.set_size_request (-1, 1);
        mtr_hsep.set_name("BlackSeparator");

        nfo_vbox.pack_start (mtr_hsep, false, false);
        nfo_vbox.pack_start (btnbox, false, false);
        nfo_vbox.pack_start (namebx, false, false);

        pack_start (mtr_container, true, true);
        pack_start (nfo_vbox, false, false);

        peakbx.show();
        btnbox.show();
        meter_metric_area.show();
        meterbox.show();
        spacer.show();
        mtr_vbox.show();
        mtr_container.show();
        mtr_hsep.show();
        nfo_vbox.show();

        UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &MeterStrip::on_theme_changed));
        ColorsChanged.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
        DPIReset.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
}

MeterStrip::MeterStrip (Session* sess, boost::shared_ptr<ARDOUR::Route> rt)
        : AxisView(sess)
        , RouteUI(0)
        , _route(rt)
        , peak_display()
{
        mtr_vbox.set_spacing (PX_SCALE(2, 2));
        nfo_vbox.set_spacing (PX_SCALE(2, 2));
        SessionHandlePtr::set_session (sess);
        RouteUI::init ();
        RouteUI::set_route (rt);

        _has_midi = false;
        _tick_bar = 0;
        _metricmode = -1;
        metric_type = MeterPeak;

        // note: level_meter->setup_meters() does the scaling
        int meter_width = 6;
        if (_route->shared_peak_meter()->input_streams().n_total() == 1) {
                meter_width = 12;
        }

        // level meter + ticks
        level_meter = new LevelMeterHBox(sess);
        level_meter->set_meter (_route->shared_peak_meter().get());
        level_meter->clear_meters();
        level_meter->set_type (_route->meter_type());
        level_meter->setup_meters (220, meter_width, 6);
        level_meter->ButtonPress.connect_same_thread (level_meter_connection, boost::bind (&MeterStrip::level_meter_button_press, this, _1));
        level_meter->MeterTypeChanged.connect_same_thread (level_meter_connection, boost::bind (&MeterStrip::meter_type_changed, this, _1));

        meter_align.set(0.5, 0.5, 0.0, 1.0);
        meter_align.add(*level_meter);

        meterbox.pack_start(meter_ticks1_area, true, false);
        meterbox.pack_start(meter_align, true, true);
        meterbox.pack_start(meter_ticks2_area, true, false);

        // peak display
        peak_display.set_name ("meterbridge peakindicator");
        peak_display.set_elements((ArdourButton::Element) (ArdourButton::Edge|ArdourButton::Body));
        ARDOUR_UI::instance()->set_tip (peak_display, _("Reset Peak"));
        max_peak = minus_infinity();
        peak_display.unset_flags (Gtk::CAN_FOCUS);
        peak_display.set_size_request(PX_SCALE(12, 12), PX_SCALE(8, 8));
        peak_display.set_corner_radius(2); // ardour-button scales this

        peak_align.set(0.5, 1.0, 1.0, 0.8);
        peak_align.add(peak_display);
        peakbx.pack_start(peak_align, true, true, 2);
        peakbx.set_size_request(-1, PX_SCALE(14, 14));

        // add track-name & -number label
        number_label.set_text("-");
        number_label.set_size_request(PX_SCALE(18, 18), PX_SCALE(18, 18));

        name_changed();

        name_label.set_corner_radius(2); // ardour button scales radius
        name_label.set_elements((ArdourButton::Element)(ArdourButton::Edge|ArdourButton::Body|ArdourButton::Text|ArdourButton::Inactive));
        name_label.set_name("meterbridge label");
        name_label.set_angle(-90.0);
        name_label.set_text_ellipsize (Pango::ELLIPSIZE_END);
        name_label.set_layout_ellipsize_width(48 * PANGO_SCALE);
        name_label.set_size_request(PX_SCALE(18, 18), PX_SCALE(50, 50));
        name_label.set_alignment(-1.0, .5);
        ARDOUR_UI::instance()->set_tip (name_label, _route->name());
        ARDOUR_UI::instance()->set_tip (*level_meter, _route->name());

        number_label.set_corner_radius(2);
        number_label.set_elements((ArdourButton::Element)(ArdourButton::Edge|ArdourButton::Body|ArdourButton::Text|ArdourButton::Inactive));
        number_label.set_name("tracknumber label");
        number_label.set_angle(-90.0);
        number_label.set_layout_ellipsize_width(18 * PANGO_SCALE);
        number_label.set_alignment(.5, .5);

        namebx.set_size_request(PX_SCALE(18, 18), PX_SCALE(52, 52));
        namebx.pack_start(namenumberbx, true, false, 0);
        namenumberbx.pack_start(name_label, true, false, 0);
        namenumberbx.pack_start(number_label, false, false, 0);

        mon_in_box.pack_start(*monitor_input_button, true, false);
        btnbox.pack_start(mon_in_box, false, false, 1);
        mon_disk_box.pack_start(*monitor_disk_button, true, false);
        btnbox.pack_start(mon_disk_box, false, false, 1);

        recbox.pack_start(*rec_enable_button, true, false);
        btnbox.pack_start(recbox, false, false, 1);
        mutebox.pack_start(*mute_button, true, false);
        btnbox.pack_start(mutebox, false, false, 1);
        solobox.pack_start(*solo_button, true, false);
        btnbox.pack_start(solobox, false, false, 1);

        rec_enable_button->set_corner_radius(2);
        rec_enable_button->set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));

        mute_button->set_corner_radius(2);
        mute_button->set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));

        solo_button->set_corner_radius(2);
        solo_button->set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));

        monitor_input_button->set_corner_radius(2);
        monitor_input_button->set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));

        monitor_disk_button->set_corner_radius(2);
        monitor_disk_button->set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));

        mutebox.set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));
        solobox.set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));
        recbox.set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));
        mon_in_box.set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));
        mon_disk_box.set_size_request (PX_SCALE(18, 18), PX_SCALE(18, 18));
        spacer.set_size_request(-1,0);

        update_button_box();
        update_name_box();
        update_background (_route->meter_type());

        mtr_vbox.pack_start (peakbx, false, false);
        mtr_vbox.pack_start (meterbox, true, true);
        mtr_vbox.pack_start (spacer, false, false);
        mtr_container.add(mtr_vbox);

        mtr_hsep.set_size_request(-1,1);
        mtr_hsep.set_name("BlackSeparator");

        nfo_vbox.pack_start (mtr_hsep, false, false);
        nfo_vbox.pack_start (btnbox, false, false);
        nfo_vbox.pack_start (namebx, false, false);

        pack_start (mtr_container, true, true);
        pack_start (nfo_vbox, false, false);

        name_label.show();
        peak_display.show();
        peakbx.show();
        meter_ticks1_area.show();
        meter_ticks2_area.show();
        meterbox.show();
        spacer.show();
        level_meter->show();
        meter_align.show();
        peak_align.show();
        btnbox.show();
        mtr_vbox.show();
        mtr_container.show();
        mtr_hsep.show();
        nfo_vbox.show();
        namenumberbx.show();

        if (boost::dynamic_pointer_cast<Track>(_route)) {
                monitor_input_button->show();
                monitor_disk_button->show();
        } else {
                monitor_input_button->hide();
                monitor_disk_button->hide();
        }

        _route->shared_peak_meter()->ConfigurationChanged.connect (
                        meter_route_connections, invalidator (*this), boost::bind (&MeterStrip::meter_configuration_changed, this, _1), gui_context()
                        );

        ResetAllPeakDisplays.connect (sigc::mem_fun(*this, &MeterStrip::reset_peak_display));
        ResetRoutePeakDisplays.connect (sigc::mem_fun(*this, &MeterStrip::reset_route_peak_display));
        ResetGroupPeakDisplays.connect (sigc::mem_fun(*this, &MeterStrip::reset_group_peak_display));
        RedrawMetrics.connect (sigc::mem_fun(*this, &MeterStrip::redraw_metrics));
        SetMeterTypeMulti.connect (sigc::mem_fun(*this, &MeterStrip::set_meter_type_multi));

        meter_configuration_changed (_route->shared_peak_meter()->input_streams ());

        meter_ticks1_area.set_size_request(PX_SCALE(3, 3), -1);
        meter_ticks2_area.set_size_request(PX_SCALE(3, 3), -1);
        meter_ticks1_area.signal_expose_event().connect (sigc::mem_fun(*this, &MeterStrip::meter_ticks1_expose));
        meter_ticks2_area.signal_expose_event().connect (sigc::mem_fun(*this, &MeterStrip::meter_ticks2_expose));

        _route->DropReferences.connect (meter_route_connections, invalidator (*this), boost::bind (&MeterStrip::self_delete, this), gui_context());
        _route->PropertyChanged.connect (meter_route_connections, invalidator (*this), boost::bind (&MeterStrip::strip_property_changed, this, _1), gui_context());

        peak_display.signal_button_release_event().connect (sigc::mem_fun(*this, &MeterStrip::peak_button_release), false);
        name_label.signal_button_release_event().connect (sigc::mem_fun(*this, &MeterStrip::name_label_button_release), false);

        UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &MeterStrip::on_theme_changed));
        ColorsChanged.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
        DPIReset.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
        Config->ParameterChanged.connect (*this, invalidator (*this), ui_bind (&MeterStrip::parameter_changed, this, _1), gui_context());
        sess->config.ParameterChanged.connect (*this, invalidator (*this), ui_bind (&MeterStrip::parameter_changed, this, _1), gui_context());

        if (_route->is_master()) {
                _strip_type = 4;
        }
        else if (boost::dynamic_pointer_cast<AudioTrack>(_route) == 0
                        && boost::dynamic_pointer_cast<MidiTrack>(_route) == 0) {
                /* non-master bus */
                _strip_type = 3;
        }
        else if (boost::dynamic_pointer_cast<MidiTrack>(_route)) {
                _strip_type = 2;
        }
        else {
                _strip_type = 1;
        }
}

MeterStrip::~MeterStrip ()
{
        if (level_meter) {
                delete level_meter;
                CatchDeletion (this);
        }
}

void
MeterStrip::self_delete ()
{
        delete this;
}

void
MeterStrip::set_session (Session* s)
{
        SessionHandlePtr::set_session (s);
        if (!s) return;
        s->config.ParameterChanged.connect (*this, invalidator (*this), ui_bind (&MeterStrip::parameter_changed, this, _1), gui_context());
        update_button_box();
        update_name_box();
}

void
MeterStrip::blink_rec_display (bool onoff)
{
        RouteUI::blink_rec_display (onoff);
}

std::string
MeterStrip::state_id() const
{
        if (_route) {
                return string_compose ("mtrs %1", _route->id().to_s());
        } else {
                return string ();
        }
}

void
MeterStrip::set_button_names()
{
        mute_button->set_text (S_("Mute|M"));

        if (_route && _route->solo_safe()) {
                solo_button->set_visual_state (Gtkmm2ext::VisualState (solo_button->visual_state() | Gtkmm2ext::Insensitive));
        } else {
                solo_button->set_visual_state (Gtkmm2ext::VisualState (solo_button->visual_state() & ~Gtkmm2ext::Insensitive));
        }
        if (!Config->get_solo_control_is_listen_control()) {
                solo_button->set_text (S_("Solo|S"));
        } else {
                switch (Config->get_listen_position()) {
                case AfterFaderListen:
                        solo_button->set_text (S_("AfterFader|A"));
                        break;
                case PreFaderListen:
                        solo_button->set_text (S_("PreFader|P"));
                        break;
                }
        }

        monitor_input_button->set_text (S_("MonitorInput|I"));
        monitor_disk_button->set_text (S_("MonitorDisk|D"));
}

void
MeterStrip::strip_property_changed (const PropertyChange& what_changed)
{
        if (!what_changed.contains (ARDOUR::Properties::name)) {
                return;
        }
        ENSURE_GUI_THREAD (*this, &MeterStrip::strip_name_changed, what_changed);
        name_changed();
        ARDOUR_UI::instance()->set_tip (name_label, _route->name());
        if (level_meter) {
                ARDOUR_UI::instance()->set_tip (*level_meter, _route->name());
        }
}

void
MeterStrip::route_color_changed ()
{
        number_label.set_fixed_colors (gdk_color_to_rgba (color()), gdk_color_to_rgba (color()));
}


void
MeterStrip::fast_update ()
{
        float mpeak = level_meter->update_meters();
        if (mpeak > max_peak) {
                max_peak = mpeak;
                if (mpeak >= ARDOUR_UI::config()->get_meter_peak()) {
                        peak_display.set_active_state ( Gtkmm2ext::ExplicitActive );
                }
        }
}

void
MeterStrip::on_theme_changed()
{
        if (level_meter && _route) {
                int meter_width = 6;
                if (_route->shared_peak_meter()->input_streams().n_total() == 1) {
                        meter_width = 12;
                }
                level_meter->setup_meters (220, meter_width, 6);
        }
}

void
MeterStrip::meter_configuration_changed (ChanCount c)
{
        int type = 0;
        _types.clear ();
        bool old_has_midi = _has_midi;

        for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
                if (c.get (*i) > 0) {
                        _types.push_back (*i);
                        type |= 1 << (*i);
                }
        }

        if (boost::dynamic_pointer_cast<AudioTrack>(_route) == 0
                        && boost::dynamic_pointer_cast<MidiTrack>(_route) == 0
                        ) {
                meter_ticks1_area.set_name ("MyAudioBusMetricsLeft");
                meter_ticks2_area.set_name ("MyAudioBusMetricsRight");
                _has_midi = false;
        }
        else if (type == (1 << DataType::AUDIO)) {
                meter_ticks1_area.set_name ("MyAudioTrackMetricsLeft");
                meter_ticks2_area.set_name ("MyAudioTrackMetricsRight");
                _has_midi = false;
        }
        else if (type == (1 << DataType::MIDI)) {
                meter_ticks1_area.set_name ("MidiTrackMetricsLeft");
                meter_ticks2_area.set_name ("MidiTrackMetricsRight");
                _has_midi = true;
        } else {
                meter_ticks1_area.set_name ("AudioMidiTrackMetricsLeft");
                meter_ticks2_area.set_name ("AudioMidiTrackMetricsRight");
                _has_midi = true;
        }
        set_tick_bar(_tick_bar);

        on_theme_changed();
        if (old_has_midi != _has_midi) MetricChanged();
        else ConfigurationChanged();
}

void
MeterStrip::set_tick_bar (int m)
{
        std::string n;
        _tick_bar = m;
        if (_tick_bar & 1) {
                n = meter_ticks1_area.get_name();
                if (n.substr(0,3) != "Bar") {
                        meter_ticks1_area.set_name("Bar" + n);
                }
        } else {
                n = meter_ticks1_area.get_name();
                if (n.substr(0,3) == "Bar") {
                        meter_ticks1_area.set_name(n.substr(3,-1));
                }
        }
        if (_tick_bar & 2) {
                n = meter_ticks2_area.get_name();
                if (n.substr(0,3) != "Bar") {
                        meter_ticks2_area.set_name("Bar" + n);
                }
        } else {
                n = meter_ticks2_area.get_name();
                if (n.substr(0,3) == "Bar") {
                        meter_ticks2_area.set_name(n.substr(3,-1));
                }
        }
}

void
MeterStrip::on_size_request (Gtk::Requisition* r)
{
        VBox::on_size_request(r);
}

void
MeterStrip::on_size_allocate (Gtk::Allocation& a)
{
        const int wh = a.get_height();
        int nh;
        int mh = 0;
        if (_session) {
                mh = _session->config.get_meterbridge_label_height();
        }
        switch (mh) {
                default:
                case 0:
                        nh = ceilf(wh * .12f);
                        if (nh < 52) nh = 52;
                        if (nh > 148) nh = 148;
                        break;
                case 1:
                        nh = 52;
                        break;
                case 2:
                        nh = 88;
                        break;
                case 3:
                        nh = 106;
                        break;
                case 4:
                        nh = 148;
                        break;
        }
        int tnh = 0;
        if (_session && _session->config.get_track_name_number()) {
                // NB numbers are rotated 90deg. on the meterbridge
                tnh = 4 + std::max(2u, _session->track_number_decimals()) * 8; // TODO 8 = max_with_of_digit_0_to_9()
        }

        nh *= ARDOUR_UI::ui_scale;
        tnh *= ARDOUR_UI::ui_scale;

        int prev_height, ignored;
        bool need_relayout = false;

        namebx.get_size_request (ignored, prev_height);
        namebx.set_size_request (PX_SCALE(18, 18), nh + tnh);

        if (prev_height != nh + tnh) {
                need_relayout = true;
        }

        namenumberbx.get_size_request (ignored, prev_height);
        namenumberbx.set_size_request (PX_SCALE(18, 18), nh + tnh);

        if (prev_height != nh + tnh) {
                need_relayout = true;
        }

        if (_route) {
                int nlh = nh + (_route->is_master() ? tnh : -1);
                name_label.get_size_request(ignored, prev_height);
                name_label.set_size_request (PX_SCALE(18, 18), nlh);
                name_label.set_layout_ellipsize_width ((nh - 4 + (_route->is_master() ? tnh : 0)) * PANGO_SCALE); // XXX
                if (prev_height != nlh) {
                        need_relayout = true;
                }
        }

        VBox::on_size_allocate(a);

        if (need_relayout) {
                queue_resize();
                MetricChanged(); // force re-layout, parent on_scroll(), queue_resize()
        }
}

gint
MeterStrip::meter_metrics_expose (GdkEventExpose *ev)
{
        if (_route) {
                return meter_expose_metrics(ev, _route->meter_type(), _types, &meter_metric_area);
        } else {
                return meter_expose_metrics(ev, metric_type, _types, &meter_metric_area);
        }
}

void
MeterStrip::set_metric_mode (int metricmode, ARDOUR::MeterType mt)
{
        if (metric_type == mt && _metricmode == metricmode) {
                return;
        }
        metric_type = mt;
        _metricmode = metricmode;

        _types.clear ();
        switch(metricmode) {
                case 0:
                        meter_metric_area.set_name ("MidiTrackMetricsLeft");
                        _types.push_back (DataType::MIDI);
                        break;
                case 1:
                        meter_metric_area.set_name ("AudioTrackMetricsLeft");
                        _types.push_back (DataType::AUDIO);
                        break;
                case 2:
                        meter_metric_area.set_name ("MidiTrackMetricsRight");
                        _types.push_back (DataType::MIDI);
                        break;
                case 3:
                default:
                        meter_metric_area.set_name ("AudioTrackMetricsRight");
                        _types.push_back (DataType::AUDIO);
                        break;
        }
        update_background (mt);
        meter_metric_area.queue_draw ();
}

void
MeterStrip::update_background(MeterType type)
{
        switch(type) {
                case MeterIEC1DIN:
                case MeterIEC1NOR:
                case MeterIEC2BBC:
                case MeterIEC2EBU:
                case MeterK12:
                case MeterK14:
                case MeterK20:
                        mtr_container.set_name ("meterstripPPM");
                        break;
                case MeterVU:
                        mtr_container.set_name ("meterstripVU");
                        break;
                default:
                        mtr_container.set_name ("meterstripDPM");
        }
}

MeterType
MeterStrip::meter_type()
{
        assert((!_route && _strip_type == 0) || (_route && _strip_type != 0));
        if (!_route) return metric_type;
        return _route->meter_type();
}

gint
MeterStrip::meter_ticks1_expose (GdkEventExpose *ev)
{
        assert(_route);
        return meter_expose_ticks(ev, _route->meter_type(), _types, &meter_ticks1_area);
}

gint
MeterStrip::meter_ticks2_expose (GdkEventExpose *ev)
{
        assert(_route);
        return meter_expose_ticks(ev, _route->meter_type(), _types, &meter_ticks2_area);
}

void
MeterStrip::reset_route_peak_display (Route* route)
{
        if (_route && _route.get() == route) {
                reset_peak_display ();
        }
}

void
MeterStrip::reset_group_peak_display (RouteGroup* group)
{
        if (_route && group == _route->route_group()) {
                reset_peak_display ();
        }
}

void
MeterStrip::reset_peak_display ()
{
        _route->shared_peak_meter()->reset_max();
        level_meter->clear_meters();
        max_peak = -INFINITY;
        peak_display.set_active_state ( Gtkmm2ext::Off );
}

bool
MeterStrip::peak_button_release (GdkEventButton* ev)
{
        if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier|Keyboard::TertiaryModifier)) {
                ResetAllPeakDisplays ();
        } else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
                if (_route) {
                        ResetGroupPeakDisplays (_route->route_group());
                }
        } else {
                ResetRoutePeakDisplays (_route.get());
        }
        return false;
}

void
MeterStrip::redraw_metrics ()
{
        meter_metric_area.queue_draw();
        meter_ticks1_area.queue_draw();
        meter_ticks2_area.queue_draw();
}

void
MeterStrip::update_button_box ()
{
        if (!_session) return;
        int height = 0;
        if (_session->config.get_show_mute_on_meterbridge()) {
                height += PX_SCALE(18, 18) + PX_SCALE(2, 2);
                mutebox.show();
        } else {
                mutebox.hide();
        }
        if (_session->config.get_show_solo_on_meterbridge()) {
                height += PX_SCALE(18, 18) + PX_SCALE(2, 2);
                solobox.show();
        } else {
                solobox.hide();
        }
        if (_session->config.get_show_rec_on_meterbridge()) {
                height += PX_SCALE(18, 18) + PX_SCALE(2, 2);
                recbox.show();
        } else {
                recbox.hide();
        }
        if (_session->config.get_show_monitor_on_meterbridge()) {
                height += PX_SCALE(18, 18) + PX_SCALE(2, 2);
                height += PX_SCALE(18, 18) + PX_SCALE(2, 2);
                mon_in_box.show();
                mon_disk_box.show();
        } else {
                mon_in_box.hide();
                mon_disk_box.hide();
        }
        btnbox.set_size_request(PX_SCALE(18, 18), height);
        check_resize();
}

void
MeterStrip::update_name_box ()
{
        if (!_session) return;
        if (_session->config.get_show_name_on_meterbridge()) {
                namebx.show();
        } else {
                namebx.hide();
        }
}

void
MeterStrip::parameter_changed (std::string const & p)
{
        if (p == "meter-peak") {
                max_peak = -INFINITY;
        }
        else if (p == "show-rec-on-meterbridge") {
                update_button_box();
        }
        else if (p == "show-mute-on-meterbridge") {
                update_button_box();
        }
        else if (p == "show-solo-on-meterbridge") {
                update_button_box();
        }
        else if (p == "show-name-on-meterbridge") {
                update_name_box();
        }
        else if (p == "show-monitor-on-meterbridge") {
                update_button_box();
        }
        else if (p == "meterbridge-label-height") {
                queue_resize();
        }
        else if (p == "track-name-number") {
                name_changed();
                queue_resize();
        }
}

void
MeterStrip::name_changed () {
        if (!_route) {
                return;
        }
        name_label.set_text(_route->name ());
        if (_session && _session->config.get_track_name_number()) {
                const int64_t track_number = _route->track_number ();
                if (track_number == 0) {
                        number_label.set_text("-");
                        number_label.hide();
                } else {
                        number_label.set_text (PBD::to_string (abs(_route->track_number ()), std::dec));
                        number_label.show();
                }
                const int tnh = 4 + std::max(2u, _session->track_number_decimals()) * 8; // TODO 8 = max_width_of_digit_0_to_9()
                // NB numbers are rotated 90deg. on the meterbridge -> use height
                number_label.set_size_request(PX_SCALE(18, 18), tnh * ARDOUR_UI::ui_scale);
        } else {
                number_label.hide();
        }
}

bool
MeterStrip::level_meter_button_press (GdkEventButton* ev)
{
        if (ev->button == 3) {
                if (_route && _route->shared_peak_meter()->input_streams ().n_audio() > 0) {
                        popup_level_meter_menu (ev);
                }
                return true;
        }

        return false;
}

void
MeterStrip::popup_level_meter_menu (GdkEventButton* ev)
{
        using namespace Gtk::Menu_Helpers;

        Gtk::Menu* m = manage (new Menu);
        MenuList& items = m->items ();

        RadioMenuItem::Group group;

        _suspend_menu_callbacks = true;
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterPeak), MeterPeak);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterPeak0dB), MeterPeak0dB);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterKrms),  MeterKrms);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterIEC1DIN), MeterIEC1DIN);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterIEC1NOR), MeterIEC1NOR);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterIEC2BBC), MeterIEC2BBC);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterIEC2EBU), MeterIEC2EBU);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterK20), MeterK20);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterK14), MeterK14);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterK12), MeterK12);
        add_level_meter_type_item (items, group, ArdourMeter::meter_type_string(MeterVU),  MeterVU);

        MeterType cmt = _route->meter_type();
        const std::string cmn = ArdourMeter::meter_type_string(cmt);

        items.push_back (SeparatorElem());
        items.push_back (MenuElem (string_compose(_("Change all in Group to %1"), cmn),
                                sigc::bind (SetMeterTypeMulti, -1, _route->route_group(), cmt)));
        items.push_back (MenuElem (string_compose(_("Change all to %1"), cmn),
                                sigc::bind (SetMeterTypeMulti, 0, _route->route_group(), cmt)));
        items.push_back (MenuElem (string_compose(_("Change same track-type to %1"), cmn),
                                sigc::bind (SetMeterTypeMulti, _strip_type, _route->route_group(), cmt)));

        m->popup (ev->button, ev->time);
        _suspend_menu_callbacks = false;
}

bool
MeterStrip::name_label_button_release (GdkEventButton* ev)
{
        if (!_session) return true;
        if (!_session->config.get_show_name_on_meterbridge()) return true;

        if (ev->button == 3) {
                popup_name_label_menu (ev);
                return true;
        }

        return false;
}

void
MeterStrip::popup_name_label_menu (GdkEventButton* ev)
{
        using namespace Gtk::Menu_Helpers;

        Gtk::Menu* m = manage (new Menu);
        MenuList& items = m->items ();

        RadioMenuItem::Group group;

        _suspend_menu_callbacks = true;
        add_label_height_item (items, group, _("Variable height"), 0);
        add_label_height_item (items, group, _("Short"), 1);
        add_label_height_item (items, group, _("Tall"), 2);
        add_label_height_item (items, group, _("Grande"), 3);
        add_label_height_item (items, group, _("Venti"), 4);

        m->popup (ev->button, ev->time);
        _suspend_menu_callbacks = false;
}

void
MeterStrip::add_label_height_item (Menu_Helpers::MenuList& items, RadioMenuItem::Group& group, string const & name, uint32_t h)
{
        using namespace Menu_Helpers;

        items.push_back (RadioMenuElem (group, name, sigc::bind (sigc::mem_fun (*this, &MeterStrip::set_label_height), h)));
        RadioMenuItem* i = dynamic_cast<RadioMenuItem *> (&items.back ());
        i->set_active (_session && _session->config.get_meterbridge_label_height() == h);
}

void
MeterStrip::add_level_meter_type_item (Menu_Helpers::MenuList& items, RadioMenuItem::Group& group, string const & name, MeterType type)
{
        using namespace Menu_Helpers;

        items.push_back (RadioMenuElem (group, name, sigc::bind (sigc::mem_fun (*this, &MeterStrip::set_meter_type), type)));
        RadioMenuItem* i = dynamic_cast<RadioMenuItem *> (&items.back ());
        i->set_active (_route->meter_type() == type);
}

void
MeterStrip::set_meter_type (MeterType type)
{
        if (_suspend_menu_callbacks) return;
        if (_route->meter_type() == type) return;

        level_meter->set_type (type);
}

void
MeterStrip::set_label_height (uint32_t h)
{
        if (_suspend_menu_callbacks) return;
        _session->config.set_meterbridge_label_height(h);
}

void
MeterStrip::meter_type_changed (MeterType type)
{
        if (_route->meter_type() != type) {
                _route->set_meter_type(type);
        }
        update_background (type);
        MetricChanged();
}

void
MeterStrip::set_meter_type_multi (int what, RouteGroup* group, MeterType type)
{
        switch (what) {
                case -1:
                        if (_route && group == _route->route_group()) {
                                level_meter->set_type (type);
                        }
                        break;
                case 0:
                        level_meter->set_type (type);
                default:
                        if (what == _strip_type) {
                                level_meter->set_type (type);
                        }
                        break;
        }
}