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panner_ui.cc

/*
  Copyright (C) 2004 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: panner_ui.cc,v 1.8 2006/02/14 20:12:03 sampo Exp $
*/

#include <limits.h>

#include <ardour/io.h>
#include <ardour/dB.h>
#include <gtkmmext/utils.h>
#include <gtkmmext/stop_signal.h>
#include <gtkmmext/barcontroller.h>
#include <midi++/manager.h>
#include <pbd/fastlog.h>

#include "ardour_ui.h"
#include "panner_ui.h"
#include "panner2d.h"
#include "utils.h"
#include "gui_thread.h"

#include <ardour/session.h>
#include <ardour/route.h>
#include <ardour/panner.h>

#include "i18n.h"

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

/* XPM */
static const gchar * forwdblarrow_xpm[] = {
"20 11 3 1",
"     c None",
".    c #000000",
"+    c #FFFFFF",
"              ..    ",
"              .+.   ",
"              .++.  ",
" ..............+++. ",
" .+++++++++++++++++.",
" ...................",
" .+++++++++++++++++.",
" ..............+++. ",
"              .++.  ",
"              .+.   ",
"              ..    "};

/* XPM */
static const gchar * revdblarrow_xpm[] = {
"20 11 3 1",
"     c None",
".    c #000000",
"+    c #FFFFFF",
"              ..    ",
"              .+.   ",
"              .++.  ",
" ..............+++. ",
" .+++++++++++++++++.",
" ...................",
" .+++++++++++++++++.",
"  .+++..............",
"   .++.             ",
"    .+.             ",
"     ..             "};


PannerUI::PannerUI (IO& io, Session& s)
      : _io (io),
        _session (s),
        panning_up_arrow (GTK_ARROW_UP, GTK_SHADOW_OUT),
        panning_down_arrow (GTK_ARROW_DOWN, GTK_SHADOW_OUT),
        panning_link_button (_("link"))
      
{
      ignore_toggle = false;
      pan_menu = 0;
      in_pan_update = false;

      pan_bar_packer.set_usize (-1, 61);
      panning_viewport.set_usize (61, 61);

      panning_viewport.set_name (X_("BaseFrame"));

      ARDOUR_UI::instance()->tooltips().set_tip (panning_link_button,
                                       _("panning link control"));
      ARDOUR_UI::instance()->tooltips().set_tip (panning_link_direction_button,
                                       _("panning link direction"));

      panning_link_box.pack_start (panning_link_button, true, true);
      panning_link_box.pack_start (panning_link_direction_button, true, true);

      panning_link_button.set_name (X_("PanningLinkButton"));
      panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));

      /* the pixmap will be reset at some point, but the key thing is that
         we need a pixmap in the button just to get started.
      */

      panning_link_direction_button.add (*(manage (new Pixmap (forwdblarrow_xpm))));

      panning_link_direction_button.clicked.connect
            (slot (*this, &PannerUI::panning_link_direction_clicked));

      panning_link_button.button_press_event.connect
            (slot (*this, &PannerUI::panning_link_button_press));
      panning_link_button.button_release_event.connect
            (slot (*this, &PannerUI::panning_link_button_release));

      panning_up.set_border_width (3);
      panning_down.set_border_width (3);
      panning_up.add (panning_up_arrow);
      panning_down.add (panning_down_arrow);
      panning_up.set_name (X_("PanScrollerBase"));
      panning_down.set_name (X_("PanScrollerBase"));
      panning_up_arrow.set_name (X_("PanScrollerArrow"));
      panning_down_arrow.set_name (X_("PanScrollerArrow"));

      pan_vbox.set_spacing (4);
      pan_vbox.pack_start (panning_viewport, false, false);
      pan_vbox.pack_start (panning_link_box, false, false);

      pack_start (pan_vbox, true, false);
      pan_vbox.show_all ();
      show ();

      panner = 0;

      _io.panner().Changed.connect (slot (*this, &PannerUI::panner_changed));
      _io.panner().LinkStateChanged.connect (slot (*this, &PannerUI::update_pan_linkage));
      _io.panner().StateChanged.connect (slot (*this, &PannerUI::update_pan_state));

      pan_changed (0);
      update_pan_sensitive ();
      update_pan_linkage ();
}

gint
PannerUI::panning_link_button_press (GdkEventButton* ev)
{
      return stop_signal (panning_link_button, "button-press-event");
}

gint
PannerUI::panning_link_button_release (GdkEventButton* ev)
{
      if (!ignore_toggle) {
            _io.panner().set_linked (!_io.panner().linked());
      }
      return TRUE;
}

void
PannerUI::panning_link_direction_clicked()
{
      switch (_io.panner().link_direction()) {
      case Panner::SameDirection:
            _io.panner().set_link_direction (Panner::OppositeDirection);
            break;
      default:
            _io.panner().set_link_direction (Panner::SameDirection);
            break;
      }
}

void
PannerUI::update_pan_linkage ()
{
      ENSURE_GUI_THREAD(slot (*this, &PannerUI::update_pan_linkage));
      
      bool x = _io.panner().linked();
      bool bx = panning_link_button.get_active();
      
      if (x != bx) {
            
            ignore_toggle = true;
            panning_link_button.set_active (x);
            ignore_toggle = false;
      }

      panning_link_direction_button.set_sensitive (x);

      switch (_io.panner().link_direction()) {
      case Panner::SameDirection:
            static_cast<Pixmap*> (panning_link_direction_button.get_child())->set (forwdblarrow_xpm);
            break;
      default:
            static_cast<Pixmap*> (panning_link_direction_button.get_child())->set (revdblarrow_xpm);
            break;
      }
}

void
PannerUI::set_width (Width w)
{
      switch (w) {
      case Wide:
            panning_viewport.set_usize (61, 61);
            if (panner) {
                  panner->set_usize (61, 61);
            }
            for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
                        (*i)->set_usize (61, 15);
            }
            static_cast<Gtk::Label*> (panning_link_button.get_child())->set_text (_("link"));
            break;
      case Narrow:
            panning_viewport.set_usize (31, 61);
            if (panner) {
                  panner->set_usize (31, 61);
            }
            for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
                        (*i)->set_usize (31, 15);
            }
            static_cast<Gtk::Label*> (panning_link_button.get_child())->set_text (_("L"));
            break;
      }

      _width = w;
}


PannerUI::~PannerUI ()
{
      for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
            delete (*i);
      }
      
      for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
            delete (*i);
      }

      if (panner) {
            delete panner;
      }

      if (pan_menu) {
            delete pan_menu;
      }

}


gint
PannerUI::entry_focus_event (GdkEventFocus* ev)
{
      if (ev->in) {
            ARDOUR_UI::instance()->allow_focus (true);
      } else {
            ARDOUR_UI::instance()->allow_focus (false);
      }
      return TRUE;
}

void
PannerUI::panner_changed ()
{
      ENSURE_GUI_THREAD (slot (*this, &PannerUI::panner_changed));
      setup_pan ();
}

void
PannerUI::update_pan_state ()
{
      /* currently nothing to do */
      // ENSURE_GUI_THREAD (slot (*this, &PannerUI::update_panner_state));
}

void
PannerUI::setup_pan ()
{
      uint32_t nouts = _io.n_outputs ();

      if (nouts == 0 || nouts == 1) {

            while (!pan_adjustments.empty()) {
                  delete pan_bars.back();
                  pan_bars.pop_back ();
                  delete pan_adjustments.back();
                  pan_adjustments.pop_back ();
            }

      } else if (nouts == 2) {

            vector<Adjustment*>::size_type asz;
            uint32_t npans = _io.panner().size();

            while (!pan_adjustments.empty()) {
                  delete pan_bars.back();
                  pan_bars.pop_back ();
                  delete pan_adjustments.back();
                  pan_adjustments.pop_back ();
            }

            while ((asz = pan_adjustments.size()) < npans) {

                  float x;
                  BarController* bc;

                  /* initialize adjustment with current value of panner */

                  _io.panner()[asz]->get_position (x);

                  pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
                  pan_adjustments.back()->value_changed.connect (bind (slot (*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));

                  _io.panner()[asz]->Changed.connect (bind (slot (*this, &PannerUI::pan_value_changed), (uint32_t) asz));

                  bc = new BarController (*pan_adjustments[asz], 
                                    &_io.panner()[asz]->midi_control(),
                                    bind (slot (*this, &PannerUI::pan_printer), pan_adjustments[asz]));
                  
                  if (_session.midi_port()) {
                        _io.panner()[asz]->reset_midi_control (_session.midi_port(), true);
                  }
                  
                  bc->set_name ("PanSlider");
                  bc->set_shadow_type (GTK_SHADOW_NONE);
                  bc->set_style (BarController::Line);
                  bc->get_spin_button().focus_in_event.connect (slot (*this, &PannerUI::entry_focus_event));
                  bc->get_spin_button().focus_out_event.connect (slot (*this, &PannerUI::entry_focus_event));

                  bc->StartGesture.connect (bind (slot (_io, &IO::start_pan_touch), (uint32_t) asz));
                  bc->StopGesture.connect (bind (slot (_io, &IO::end_pan_touch), (uint32_t) asz));

                  char buf[64];
                  snprintf (buf, sizeof (buf), _("panner for channel %u"), asz + 1);
                  ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);

                  bc->event_widget().button_release_event.connect
                        (bind (slot (*this, &PannerUI::pan_button_event), (uint32_t) asz));

                  pan_bars.push_back (bc);
                  switch (_width) {
                  case Wide:
                        pan_bars.back()->set_usize (61, 15);
                        break;
                  case Narrow:
                        pan_bars.back()->set_usize (31, 15);
                        break;
                  }

                  pan_bar_packer.pack_start (*pan_bars.back(), false, false);
            }

            /* now that we actually have the pan bars,
               set their sensitivity based on current
               automation state.
            */

            update_pan_sensitive ();

            panning_viewport.remove ();
            panning_viewport.add (pan_bar_packer);
            panning_viewport.show_all ();

      } else {

            int w = 0;

            switch (_width) {
            case Wide:
                  w = 61;
                  break;
            case Narrow:
                  w = 31;
                  break;
            }

            if (panner == 0) {
                  panner = new Panner2d (_io.panner(), w, 61);
                  panner->set_name ("MixerPanZone");
                  panner->show ();
            }
            
            update_pan_sensitive ();
            panner->reset (_io.n_inputs());
            panner->set_usize (w, 61);

            /* and finally, add it to the panner frame */

            panning_viewport.remove ();
            panning_viewport.add (*panner);
            panning_viewport.show_all ();
      }
}

gint
PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
{
      switch (ev->button) {
      case 3:
            if (pan_menu == 0) {
                  pan_menu = manage (new Menu);
                  pan_menu->set_name ("ArdourContextMenu");
            }
            build_pan_menu (which);
            pan_menu->popup (1, ev->time);
            return TRUE;
            break;
      default:
            return FALSE;
      }

      return FALSE; // what's wrong with gcc?
}

void
PannerUI::build_pan_menu (uint32_t which)
{
      using namespace Menu_Helpers;
      MenuList& items (pan_menu->items());

      items.clear ();

      items.push_back (CheckMenuElem (_("Mute")));
      
      /* set state first, connect second */

      (dynamic_cast<CheckMenuItem*> (items.back()))->set_active (_io.panner()[which]->muted());
      (dynamic_cast<CheckMenuItem*> (items.back()))->toggled.connect
            (bind (slot (*this, &PannerUI::pan_mute), which));

      items.push_back (CheckMenuElem (_("Bypass"), slot (*this, &PannerUI::pan_bypass_toggle)));
      bypass_menu_item = static_cast<CheckMenuItem*> (items.back());

      /* set state first, connect second */

      bypass_menu_item->set_active (_io.panner().bypassed());
      bypass_menu_item->toggled.connect (slot (*this, &PannerUI::pan_bypass_toggle));

      items.push_back (MenuElem (_("Reset"), slot (*this, &PannerUI::pan_reset)));
      items.push_back (SeparatorElem());
      items.push_back (MenuElem (_("Reset all")));
}

void
PannerUI::pan_mute (uint32_t which)
{
      StreamPanner* sp = _io.panner()[which];
      sp->set_muted (!sp->muted());
}

void
PannerUI::pan_bypass_toggle ()
{
      if (bypass_menu_item && (_io.panner().bypassed() != bypass_menu_item->get_active())) {
            _io.panner().set_bypassed (!_io.panner().bypassed());
      }
}

void
PannerUI::pan_reset ()
{
}

void
PannerUI::effective_pan_display ()
{
      if (_io.panner().empty()) {
            return;
      }

      switch (_io.n_outputs()) {
      case 0: 
      case 1:
            /* relax */
            break;

      case 2:
            update_pan_bars (true);
            break;

      default:
                //panner->move_puck (pan_value (v, right), 0.5);
            break;
      }
}

void
PannerUI::pan_changed (void *src)
{
      if (src == this) {
            return;
      }

      switch (_io.panner().size()) {
      case 0:
            panning_link_box.set_sensitive (false);
            return;
      case 1:
            panning_link_box.set_sensitive (false);
            break;
      default:
            panning_link_box.set_sensitive (true);
      }

      uint32_t nouts = _io.n_outputs();

      switch (nouts) {
      case 0:
      case 1:
            /* relax */
            break;

      case 2:
            update_pan_bars (false);
            break;

      default:
            // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
            break;
      }
}

void
PannerUI::pan_adjustment_changed (uint32_t which)
{
      if (!in_pan_update && which < _io.panner().size()) {

            float xpos;
            float val = pan_adjustments[which]->get_value ();
            _io.panner()[which]->get_position (xpos);

            /* add a kinda-sorta detent for the middle */
            
            if (val != 0.5 && Panner::equivalent (val, 0.5)) {
                  /* this is going to be reentrant, so just 
                     return after it.
                  */

                  in_pan_update = true;
                  pan_adjustments[which]->set_value (0.5);
                  in_pan_update = false;
                  return;
            }
            
            if (!Panner::equivalent (val, xpos)) {

                  _io.panner()[which]->set_position (val);
                  /* XXX 
                     the panner objects have no access to the session,
                     so do this here. ick.
                  */
                  _session.set_dirty();
            }
      }
}

void
PannerUI::pan_value_changed (uint32_t which)
{
      ENSURE_GUI_THREAD (bind (slot (*this, &PannerUI::pan_value_changed), which));
      
      // Make sure there really are panners
      if (_io.n_outputs() > 1 && which < _io.panner().size()) {
            float xpos;
            float val = pan_adjustments[which]->get_value ();

            _io.panner()[which]->get_position (xpos);

            if (!Panner::equivalent (val, xpos)) {
                  in_pan_update = true;
                  pan_adjustments[which]->set_value (xpos);
                  in_pan_update = false;
            }
      }
}     

void
PannerUI::update_pan_bars (bool only_if_aplay)
{
      uint32_t n;
      vector<Adjustment*>::iterator i;

      in_pan_update = true;

      /* this runs during automation playback, and moves the bar controllers
         and/or pucks around.
      */

      for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
            float xpos, val;

            if (only_if_aplay) {
                  AutomationList& alist (_io.panner()[n]->automation());
                  
                  if (!alist.automation_playback()) {
                        continue;
                  }
            }

            _io.panner()[n]->get_effective_position (xpos);
            val = (*i)->get_value ();
            
            if (!Panner::equivalent (val, xpos)) {
                  (*i)->set_value (xpos);
            }
      }

      in_pan_update = false;
}

void
PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
{
      float val = adj->get_value();

      if (val == 0.0f) {
            snprintf (buf, len, X_("L"));
      } else if (val == 1.0f) {
            snprintf (buf, len, X_("R"));
      } else if (Panner::equivalent (val, 0.5f)) {
            snprintf (buf, len, X_("C"));
      } else {
            /* don't print anything */
            buf[0] = '\0';
      }
}

void
PannerUI::update_pan_sensitive ()
{
      bool sensitive = !(_io.panner().automation_state() & Play);

      switch (_io.n_outputs()) {
      case 0:
      case 1:
            break;
      case 2:
            for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
                  (*i)->set_sensitive (sensitive);
            }
            break;
      default:
            if (panner) {
                  panner->set_sensitive (sensitive);
            }
            break;
      }
}


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