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meter_bridge.cc

/*
    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.

    $Id: meter_bridge.cc,v 1.13 2005/02/09 19:19:02 pauld Exp $
*/

#include <ardour/session.h>
#include <ardour/session_route.h>
#include <ardour/diskstream.h>
#include <ardour/audio_track.h>

#include "ardour_ui.h"
#include "meter_bridge.h"
#include "meter_bridge_strip.h"
#include "utils.h"
#include "gui_thread.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace Gtk;
using namespace SigC;

#define FRAME_SHADOW_STYLE GTK_SHADOW_IN
#define FRAME_NAME "BaseFrame"

MeterBridge::MeterBridge ()
      : ArdourDialog ("meter bridge")
{
      meter_base.set_name ("MeterBase");
      meter_frame.set_shadow_type (FRAME_SHADOW_STYLE);
      meter_frame.set_name (FRAME_NAME);
      meter_frame.add (meter_base);

      upper_metering_box.set_name ("AboveMeterZone");
      lower_metering_box.set_name ("BelowMeterZone");

      metering_vbox.set_spacing (5);
      metering_vbox.set_border_width (10);
      metering_vbox.pack_start (upper_metering_box, false, false);
      metering_vbox.pack_start (meter_frame, false, false);
      metering_vbox.pack_start (lower_metering_box, false, false);

      metering_hbox.pack_start (metering_vbox, false, false);

      meter_scroll_base.set_name ("MeterScrollBase");
      meter_scroll_base.add (metering_hbox);

      meter_viewport.add (meter_scroll_base);
      meter_viewport.set_shadow_type (GTK_SHADOW_NONE);

      meter_scroller.add (meter_viewport);
      meter_scroller.set_name ("MeterBridgeWindow");
      meter_scroller.set_policy (GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
      meter_scroller.set_border_width (5);

      add (meter_scroller);
      add_events (GDK_KEY_PRESS_MASK|GDK_KEY_RELEASE_MASK);
      set_name ("MeterBridgeWindow");
      set_title (_("ardour: meter bridge"));
      set_wmclass (_("ardour_meter_bridge"), "Ardour");
      // set_policy (false, false, false); // no user resizing of any kind

      delete_event.connect (bind (slot (just_hide_it), static_cast<Gtk::Window*>(this)));

      metering = false;

      /* don't show: this window doesn't come up by default */
}

MeterBridge::~MeterBridge ()
{
      stop_metering ();
}

void
MeterBridge::set_session (Session *s)
{
      ArdourDialog::set_session (s);

      if (session) {
            // XXX this stuff has to be fixed if we ever use this code again
            // (refs vs. ptrs)
            // session->foreach_route (this, &MeterBridge::add_route);
            session->RouteAdded.connect (slot (*this, &MeterBridge::add_route));
            session->going_away.connect (slot (*this, &MeterBridge::session_gone));
            start_metering ();
      }
}

void
MeterBridge::session_gone ()
{
      ENSURE_GUI_THREAD(slot (*this, &MeterBridge::session_gone));
      
      stop_metering ();
      hide_all ();

      list<MeterBridgeStrip *>::iterator i;

      for (i = meters.begin(); i != meters.end(); ++i) {

            upper_metering_box.remove ((*i)->above_box());
            meter_base.remove ((*i)->meter_widget());
            lower_metering_box.remove ((*i)->below_box());

//          delete (*i);
      }

      meters.clear ();

      ArdourDialog::session_gone();
}     

void
MeterBridge::add_route (ARDOUR::Route* route)
{
      ENSURE_GUI_THREAD(bind (slot (*this, &MeterBridge::add_route), route));
      
      uint32_t n;
      char buf[32];

      if (!session || route->hidden() || dynamic_cast<AudioTrack*>(route) == 0) {
            return;
      }

      n = meters.size();
      snprintf (buf, sizeof (buf), "%u", n+1);

      MeterBridgeStrip *meter = new MeterBridgeStrip (session->engine(), 
                                          *session,
                                          *route,
                                          buf,
                                          session->over_length_long,
                                          session->over_length_short,
                                          200);
      
#define packing_factor 30

      upper_metering_box.put (meter->above_box(), n * packing_factor, 0);

      meter_base.put (meter->meter_widget(), (n * packing_factor) + (meter->meter_width()/2), 0);
      lower_metering_box.put (meter->below_box(), n * packing_factor, 0);

      meter->above_box().show_all ();
      meter->meter_widget().show ();
      meter->below_box().show_all ();

      route->GoingAway.connect (bind (slot (*this, &MeterBridge::remove_route), route));
      meters.insert (meters.begin(), meter);

      set_default_size (30 + ((n+1) * packing_factor), 315);
    
      meter->set_meter_on(true);
      
      session->going_away.connect (slot (*this, &MeterBridge::session_gone));
}

void
MeterBridge::remove_route (Route* route)
{
      ENSURE_GUI_THREAD(bind (slot (*this, &MeterBridge::remove_route), route));
      list<MeterBridgeStrip *>::iterator i;

      for (i = meters.begin(); i != meters.end(); ++i) {
            if (&((*i)->route()) == route) {
                  delete *i;
                  meters.erase (i);
                  return;
            }
      }
}

void
MeterBridge::clear_all_meters ()
{
      list<MeterBridgeStrip *>::iterator i;

      for (i = meters.begin(); i != meters.end(); ++i) {
            (*i)->clear_meter ();
      }
}

void
MeterBridge::update ()
{
      list<MeterBridgeStrip *>::iterator i;

      for (i = meters.begin(); i != meters.end(); ++i) {
            (*i)->update ();
      }
}

void
MeterBridge::start_metering ()
{
      list<MeterBridgeStrip *>::iterator i;
      
      for (i = meters.begin(); i != meters.end(); ++i) {
            (*i)->set_meter_on (true);
      }
      metering_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect 
            (slot (*this, &MeterBridge::update));
      metering = true;
}

void
MeterBridge::stop_metering ()
{
      list<MeterBridgeStrip *>::iterator i;
      
      for (i = meters.begin(); i != meters.end(); ++i) {
            (*i)->set_meter_on (false);
      }
      metering_connection.disconnect();
      metering = false;
}

void
MeterBridge::toggle_metering ()
{
      if (!metering) {
            start_metering ();
      } else {
            stop_metering ();
      }
}

gint
MeterBridge::map_event_impl (GdkEventAny *ev)
{
      start_metering ();
      return Window::map_event_impl (ev);
}

gint
MeterBridge::unmap_event_impl (GdkEventAny *ev)
{
      stop_metering ();
      return Window::unmap_event_impl (ev);
}


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