gtk2_ardour/crossfade_view.h

   1 /*
   2     Copyright (C) 2003 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __gtk_ardour_crossfade_view_h__
  21 #define __gtk_ardour_crossfade_view_h__
  22
  23 #include <vector>
  24 #include <libgnomecanvasmm.h>
  25 #include <sigc++/signal.h>
  26 #include <ardour/crossfade.h>
  27
  28 #include "time_axis_view_item.h"
  29
  30 class RouteTimeAxisView;
  31 class AudioRegionView;
  32
  33 struct CrossfadeView : public TimeAxisViewItem
  34 {
  35     CrossfadeView (ArdourCanvas::Group*,
  36                    RouteTimeAxisView&,
  37                    boost::shared_ptr<ARDOUR::Crossfade>,
  38                    double initial_samples_per_unit,
  39                    Gdk::Color& basic_color,
  40                    AudioRegionView& leftview,
  41                    AudioRegionView& rightview);
  42     ~CrossfadeView ();
  43
  44     boost::shared_ptr<ARDOUR::Crossfade> crossfade;  // ok, let 'em have it
  45
  46     AudioRegionView& left_view;    // and these too
  47     AudioRegionView& right_view;
  48
  49     void set_height (double);
  50
  51     bool valid() const { return _valid; }
  52     bool visible() const { return _visible; }
  53     void set_valid (bool yn);
  54
  55     static sigc::signal<void,CrossfadeView*> GoingAway;
  56
  57     AudioRegionView& upper_regionview () const;
  58
  59     void fake_hide ();
  60     void hide ();
  61     void show ();
  62
  63   protected:
  64     void reset_width_dependent_items (double pixel_width);
  65
  66   private:
  67     bool _valid;
  68     bool _visible;
  69
  70     double spu;
  71
  72     ArdourCanvas::Item *overlap_rect;
  73     ArdourCanvas::Line *fade_in;
  74     ArdourCanvas::Line *fade_out;
  75     ArdourCanvas::Item *active_button;
  76
  77     void crossfade_changed (ARDOUR::Change);
  78     void active_changed ();
  79     void redraw_curves ();
  80         void color_handler ();
  81 };
  82
  83 #endif /* __gtk_ardour_crossfade_view_h__ */