Logo Search packages:      
Sourcecode: ardour version File versions  Download package

crossfade_view.cc

/*
    Copyright (C) 2003 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 <algorithm>

#include <ardour/region.h>
#include <gtkmm2ext/doi.h>

#include "canvas-simplerect.h"
#include "canvas-curve.h"
#include "crossfade_view.h"
#include "rgb_macros.h"
#include "audio_time_axis.h"
#include "public_editor.h"
#include "audio_region_view.h"
#include "utils.h"
#include "canvas_impl.h"
#include "ardour_ui.h"

using namespace sigc;
using namespace ARDOUR;
using namespace PBD;
using namespace Editing;
using namespace Gnome;
using namespace Canvas;

sigc::signal<void,CrossfadeView*> CrossfadeView::GoingAway;

CrossfadeView::CrossfadeView (ArdourCanvas::Group *parent, 
                        RouteTimeAxisView &tv, 
                        boost::shared_ptr<Crossfade> xf, 
                        double spu,
                        Gdk::Color& basic_color,
                        AudioRegionView& lview,
                        AudioRegionView& rview)
                        

      : TimeAxisViewItem ("xfade" /*xf.name()*/, *parent, tv, spu, basic_color, xf->position(), 
                      xf->length(), false, TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowFrame)),
        crossfade (xf),
        left_view (lview),
        right_view (rview)
      
{
      _valid = true;
      _visible = true;

      fade_in = new Line (*group);
      fade_in->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeLine.get();
      fade_in->property_width_pixels() = 1;

      fade_out = new Line (*group);
      fade_out->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeLine.get();
      fade_out->property_width_pixels() = 1;
      
      set_height (get_time_axis_view().current_height());

      /* no frame around the xfade or overlap rects */

      frame->property_outline_what() = 0;

      /* never show the vestigial frame */

      vestigial_frame->hide();
      show_vestigial = false;
      
      group->signal_event().connect (bind (mem_fun (tv.editor, &PublicEditor::canvas_crossfade_view_event), group, this));
      
      crossfade_changed (Change (~0));

      crossfade->StateChanged.connect (mem_fun(*this, &CrossfadeView::crossfade_changed));
      ColorsChanged.connect (mem_fun (*this, &CrossfadeView::color_handler));
}

CrossfadeView::~CrossfadeView ()
{
      GoingAway (this) ; /* EMIT_SIGNAL */
}

void
CrossfadeView::reset_width_dependent_items (double pixel_width)
{
      TimeAxisViewItem::reset_width_dependent_items (pixel_width);

      active_changed ();

      if (pixel_width < 5) {
            fade_in->hide();
            fade_out->hide();
      }
}

void
CrossfadeView::set_height (double height)
{
      if (height <= TimeAxisView::hSmaller) {
            TimeAxisViewItem::set_height (height - 3);
      } else {
            TimeAxisViewItem::set_height (height - NAME_HIGHLIGHT_SIZE - 3 );
      }

      redraw_curves ();
}

void
CrossfadeView::crossfade_changed (Change what_changed)
{
      bool need_redraw_curves = false;

      if (what_changed & BoundsChanged) {
            set_position (crossfade->position(), this);
            set_duration (crossfade->length(), this);
            need_redraw_curves = true;
      }

      if (what_changed & Crossfade::FollowOverlapChanged) {
            need_redraw_curves = true;
      }
      
      if (what_changed & Crossfade::ActiveChanged) {
            /* calls redraw_curves */
            active_changed ();
      } else if (need_redraw_curves) {
            redraw_curves ();
      }
}

void
CrossfadeView::redraw_curves ()
{
      Points* points; 
      int32_t npoints;
      float* vec;
      double h;

      if (!crossfade->following_overlap()) {
            /* curves should not be visible */
            fade_in->hide ();
            fade_out->hide ();
            return;
      }

      /*
       At "height - 3.0" the bottom of the crossfade touches the name highlight or the bottom of the track (if the
       track is either Small or Smaller.
       */
      double tav_height = get_time_axis_view().current_height();
      if (tav_height == TimeAxisView::hSmaller ||
          tav_height == TimeAxisView::hSmall) {
            h = tav_height - 3.0;
      } else {
            h = tav_height - NAME_HIGHLIGHT_SIZE - 3.0;
      }

      if (h < 0) {
            /* no space allocated yet */
            return;
      }

      npoints = get_time_axis_view().editor.frame_to_pixel (crossfade->length());
      npoints = std::min (gdk_screen_width(), npoints);

      if (!_visible || !crossfade->active() || npoints < 3) {
            fade_in->hide();
            fade_out->hide();
            return;
      } else {
            fade_in->show();
            fade_out->show();
      } 

      points = get_canvas_points ("xfade edit redraw", npoints);
      vec = new float[npoints];

      crossfade->fade_in().get_vector (0, crossfade->length(), vec, npoints);
      for (int i = 0, pci = 0; i < npoints; ++i) {
            Art::Point &p = (*points)[pci++];
            p.set_x(i);
            p.set_y(2.0 + h - (h * vec[i]));
      }
      fade_in->property_points() = *points;

      crossfade->fade_out().get_vector (0, crossfade->length(), vec, npoints);
      for (int i = 0, pci = 0; i < npoints; ++i) {
            Art::Point &p = (*points)[pci++];
            p.set_x(i);
            p.set_y(2.0 + h - (h * vec[i]));
      }
      fade_out->property_points() = *points;

      delete [] vec;

      delete points;

      /* XXX this is ugly, but it will have to wait till Crossfades are reimplented
         as regions. This puts crossfade views on top of a track, above all regions.
      */

      group->raise_to_top();
}

void
CrossfadeView::active_changed ()
{
      if (crossfade->active()) {
            frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ActiveCrossfade.get();
      } else {
            frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_InactiveCrossfade.get();
      }

      redraw_curves ();
}

void
CrossfadeView::color_handler ()
{
      active_changed ();
}

void
CrossfadeView::set_valid (bool yn)
{
      _valid = yn;
}

AudioRegionView&
CrossfadeView::upper_regionview () const
{
      if (left_view.region()->layer() > right_view.region()->layer()) {
            return left_view;
      } else {
            return right_view;
      }
}

void
CrossfadeView::show ()
{
      group->show();
      _visible = true;
}

void
CrossfadeView::hide ()
{
      group->hide();
      _visible = false;
}

void
CrossfadeView::fake_hide ()
{
      group->hide();
}

Generated by  Doxygen 1.6.0   Back to index