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streamview.cc

/*
    Copyright (C) 2001, 2006 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.
*/

#include <cmath>

#include <gtkmm.h>

#include <gtkmm2ext/gtk_ui.h>

#include <ardour/playlist.h>
#include <ardour/region.h>
#include <ardour/source.h>
#include <ardour/diskstream.h>
#include <ardour/track.h>

#include "streamview.h"
#include "region_view.h"
#include "route_time_axis.h"
#include "canvas-waveview.h"
#include "canvas-simplerect.h"
#include "region_selection.h"
#include "selection.h"
#include "public_editor.h"
#include "ardour_ui.h"
#include "rgb_macros.h"
#include "gui_thread.h"
#include "utils.h"

using namespace ARDOUR;
using namespace PBD;
using namespace Editing;

StreamView::StreamView (RouteTimeAxisView& tv)
      : _trackview (tv)
      , _background_group(new ArdourCanvas::Group(*_trackview.canvas_background))
      , canvas_group(new ArdourCanvas::Group(*_trackview.canvas_display))
      , _samples_per_unit(_trackview.editor.get_current_zoom())
      , rec_updating(false)
      , rec_active(false)
      , use_rec_regions(tv.editor.show_waveforms_recording())
      , region_color(_trackview.color())
      , stream_base_color(0xFFFFFFFF)
{
      /* set_position() will position the group */

      canvas_rect = new ArdourCanvas::SimpleRect (*_background_group);
      canvas_rect->property_x1() = 0.0;
      canvas_rect->property_y1() = 0.0;
      canvas_rect->property_x2() = _trackview.editor.get_physical_screen_width();
      canvas_rect->property_y2() = (double) tv.current_height();

      canvas_rect->property_outline_what() = (guint32) (0x1|0x2|0x8);  // outline ends and bottom 
      // (Fill/Outline colours set in derived classes)

      canvas_rect->signal_event().connect (bind (mem_fun (_trackview.editor, &PublicEditor::canvas_stream_view_event), canvas_rect, &_trackview));

      if (_trackview.is_track()) {
            _trackview.track()->DiskstreamChanged.connect (mem_fun (*this, &StreamView::diskstream_changed));
            _trackview.session().TransportStateChange.connect (mem_fun (*this, &StreamView::transport_changed));
            _trackview.session().TransportLooped.connect (mem_fun (*this, &StreamView::transport_looped));
            _trackview.get_diskstream()->RecordEnableChanged.connect (mem_fun (*this, &StreamView::rec_enable_changed));
            _trackview.session().RecordStateChanged.connect (mem_fun (*this, &StreamView::sess_rec_enable_changed));
      } 

      ColorsChanged.connect (mem_fun (*this, &StreamView::color_handler));
}

StreamView::~StreamView ()
{
      undisplay_diskstream ();
      delete canvas_group;
}

void
StreamView::attach ()
{
      if (_trackview.is_track()) {
            display_diskstream (_trackview.get_diskstream());
      }
}

int
StreamView::set_position (gdouble x, gdouble y)

{
      canvas_group->property_x() = x;
      canvas_group->property_y() = y;
      return 0;
}

int
StreamView::set_height (gdouble h)
{
      /* limit the values to something sane-ish */

      if (h < 10.0 || h > 1000.0) {
            return -1;
      }

      if (canvas_rect->property_y2() == h) {
            return 0;
      }

      canvas_rect->property_y2() = h;

      for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
            (*i)->set_height (h);
      }

      for (vector<RecBoxInfo>::iterator i = rec_rects.begin(); i != rec_rects.end(); ++i) {
            RecBoxInfo &recbox = (*i);
            recbox.rectangle->property_y2() = h - 1.0;
      }

      return 0;
}

int 
StreamView::set_samples_per_unit (gdouble spp)
{
      RegionViewList::iterator i;

      if (spp < 1.0) {
            return -1;
      }

      _samples_per_unit = spp;

      for (i = region_views.begin(); i != region_views.end(); ++i) {
            (*i)->set_samples_per_unit (spp);
      }

      for (vector<RecBoxInfo>::iterator xi = rec_rects.begin(); xi != rec_rects.end(); ++xi) {
            RecBoxInfo &recbox = (*xi);
            
            gdouble xstart = _trackview.editor.frame_to_pixel ( recbox.start );
            gdouble xend = _trackview.editor.frame_to_pixel ( recbox.start + recbox.length );

            recbox.rectangle->property_x1() = xstart;
            recbox.rectangle->property_x2() = xend;
      }

      return 0;
}

void
StreamView::add_region_view (boost::shared_ptr<Region> r)
{
      add_region_view_internal (r, true);
}

void
StreamView::remove_region_view (boost::weak_ptr<Region> weak_r)
{
      ENSURE_GUI_THREAD (bind (mem_fun (*this, &StreamView::remove_region_view), weak_r));

      boost::shared_ptr<Region> r (weak_r.lock());

      if (!r) {
            return;
      }

      for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
            if (((*i)->region()) == r) {
                  delete *i;
                  region_views.erase (i);
                  break;
            }
      }
}

void
StreamView::undisplay_diskstream ()
{
      for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
            delete *i;
      }

      region_views.clear();
}

void
StreamView::display_diskstream (boost::weak_ptr<Diskstream> wds)
{
      boost::shared_ptr<Diskstream> ds = wds.lock();

      if (!ds) {
            return;
      }
            
      playlist_change_connection.disconnect();
      playlist_changed (wds);
      playlist_change_connection = ds->PlaylistChanged.connect (bind (mem_fun (*this, &StreamView::playlist_changed), wds));
}

void
StreamView::playlist_modified ()
{
      ENSURE_GUI_THREAD (mem_fun (*this, &StreamView::playlist_modified));

      redisplay_diskstream ();
}

void
StreamView::playlist_changed (boost::weak_ptr<Diskstream> wptr)
{
      ENSURE_GUI_THREAD (bind (mem_fun (*this, &StreamView::playlist_changed), wptr));

      boost::shared_ptr<Diskstream> ds = wptr.lock();
      
      if (!ds) {
            return;
      }

      /* disconnect from old playlist */

      for (vector<sigc::connection>::iterator i = playlist_connections.begin(); i != playlist_connections.end(); ++i) {
            (*i).disconnect();
      }
      
      playlist_connections.clear();
      undisplay_diskstream ();

      /* draw it */

      redisplay_diskstream ();

      /* catch changes */

      playlist_connections.push_back (ds->playlist()->Modified.connect (mem_fun (*this, &StreamView::playlist_modified)));
}

void
StreamView::diskstream_changed ()
{
      boost::shared_ptr<Track> t = _trackview.track();

      if (t) {
            Gtkmm2ext::UI::instance()->call_slot (bind (mem_fun (*this, &StreamView::display_diskstream), boost::weak_ptr<Diskstream> (t->diskstream())));
      } else {
            Gtkmm2ext::UI::instance()->call_slot (mem_fun (*this, &StreamView::undisplay_diskstream));
      }
}

void
StreamView::apply_color (Gdk::Color& color, ColorTarget target)

{
      list<RegionView *>::iterator i;

      switch (target) {
      case RegionColor:
            region_color = color;
            for (i = region_views.begin(); i != region_views.end(); ++i) {
                  (*i)->set_color (region_color);
            }
            break;
            
      case StreamBaseColor:
            stream_base_color = RGBA_TO_UINT (
                  color.get_red_p(), color.get_green_p(), color.get_blue_p(), 255);
            canvas_rect->property_fill_color_rgba() = stream_base_color;
            break;
      }
}

void
StreamView::region_layered (RegionView* rv)
{
      rv->get_canvas_group()->lower_to_bottom();

      /* don't ever leave it at the bottom, since then it doesn't
         get events - the  parent group does instead ...
      */
      rv->get_canvas_group()->raise (rv->region()->layer());
}

void
StreamView::rec_enable_changed ()
{
      Gtkmm2ext::UI::instance()->call_slot (mem_fun (*this, &StreamView::setup_rec_box));
}

void
StreamView::sess_rec_enable_changed ()
{
      Gtkmm2ext::UI::instance()->call_slot (mem_fun (*this, &StreamView::setup_rec_box));
}

void
StreamView::transport_changed()
{
      Gtkmm2ext::UI::instance()->call_slot (mem_fun (*this, &StreamView::setup_rec_box));
}

void
StreamView::transport_looped()
{
      // to force a new rec region
      rec_active = false;
      Gtkmm2ext::UI::instance()->call_slot (mem_fun (*this, &StreamView::setup_rec_box));
}

void
StreamView::update_rec_box ()
{
      if (rec_active && rec_rects.size() > 0) {
            /* only update the last box */
            RecBoxInfo & rect = rec_rects.back();
            nframes_t at = _trackview.get_diskstream()->current_capture_end();
            double xstart;
            double xend;
            
            switch (_trackview.track()->mode()) {
            case Normal:
                  rect.length = at - rect.start;
                  xstart = _trackview.editor.frame_to_pixel (rect.start);
                  xend = _trackview.editor.frame_to_pixel (at);
                  break;
                  
            case Destructive:
                  rect.length = 2;
                  xstart = _trackview.editor.frame_to_pixel (_trackview.get_diskstream()->current_capture_start());
                  xend = _trackview.editor.frame_to_pixel (at);
                  break;
            }
            
            rect.rectangle->property_x1() = xstart;
            rect.rectangle->property_x2() = xend;
      }
}
      
RegionView*
StreamView::find_view (boost::shared_ptr<const Region> region)
{
      for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {

            if ((*i)->region() == region) {
                  return *i;
            }
      }
      return 0;
}
      
void
StreamView::foreach_regionview (sigc::slot<void,RegionView*> slot)
{
      for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
            slot (*i);
      }
}

void
StreamView::set_selected_regionviews (RegionSelection& regions)
{
      bool selected;

      for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
            
            selected = false;
            
            for (RegionSelection::iterator ii = regions.begin(); ii != regions.end(); ++ii) {
                  if (*i == *ii) {
                        selected = true;
                  }
            }

            (*i)->set_selected (selected);
      }
}

void
StreamView::get_selectables (nframes_t start, nframes_t end, list<Selectable*>& results)
{
      for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
            if ((*i)->region()->coverage(start, end) != OverlapNone) {
                  results.push_back (*i);
            }
      }
}

void
StreamView::get_inverted_selectables (Selection& sel, list<Selectable*>& results)
{
      for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
            if (!sel.regions.contains (*i)) {
                  results.push_back (*i);
            }
      }
}


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