gtk2_ardour/crossfade_view.cc

   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 #include <algorithm>
  21
  22 #include "ardour/region.h"
  23 #include <gtkmm2ext/doi.h>
  24
  25 #include "canvas-simplerect.h"
  26 #include "canvas-curve.h"
  27 #include "crossfade_view.h"
  28 #include "rgb_macros.h"
  29 #include "audio_time_axis.h"
  30 #include "public_editor.h"
  31 #include "audio_region_view.h"
  32 #include "utils.h"
  33 #include "canvas_impl.h"
  34 #include "ardour_ui.h"
  35
  36 using namespace sigc;
  37 using namespace ARDOUR;
  38 using namespace PBD;
  39 using namespace Editing;
  40 using namespace Gnome;
  41 using namespace Canvas;
  42
  43 sigc::signal<void,CrossfadeView*> CrossfadeView::GoingAway;
  44
  45 CrossfadeView::CrossfadeView (ArdourCanvas::Group *parent,
  46                               RouteTimeAxisView &tv,
  47                               boost::shared_ptr<Crossfade> xf,
  48                               double spu,
  49                               Gdk::Color& basic_color,
  50                               AudioRegionView& lview,
  51                               AudioRegionView& rview)
  52
  53
  54         : TimeAxisViewItem ("xfade" /*xf.name()*/, *parent, tv, spu, basic_color, xf->position(),
  55                             xf->length(), false, TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowFrame)),
  56           crossfade (xf),
  57           left_view (lview),
  58           right_view (rview)
  59
  60 {
  61         _valid = true;
  62         _visible = true;
  63
  64         fade_in = new Line (*group);
  65         fade_in->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeLine.get();
  66         fade_in->property_width_pixels() = 1;
  67
  68         fade_out = new Line (*group);
  69         fade_out->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeLine.get();
  70         fade_out->property_width_pixels() = 1;
  71
  72         set_height (get_time_axis_view().current_height());
  73
  74         /* no frame around the xfade or overlap rects */
  75
  76         frame->property_outline_what() = 0;
  77
  78         /* never show the vestigial frame */
  79
  80         vestigial_frame->hide();
  81         show_vestigial = false;
  82
  83         group->signal_event().connect (bind (mem_fun (tv.editor(), &PublicEditor::canvas_crossfade_view_event), group, this));
  84
  85         crossfade_changed (Change (~0));
  86
  87         crossfade->StateChanged.connect (mem_fun(*this, &CrossfadeView::crossfade_changed));
  88         ColorsChanged.connect (mem_fun (*this, &CrossfadeView::color_handler));
  89 }
  90
  91 CrossfadeView::~CrossfadeView ()
  92 {
  93          GoingAway (this) ; /* EMIT_SIGNAL */
  94 }
  95
  96 void
  97 CrossfadeView::reset_width_dependent_items (double pixel_width)
  98 {
  99         TimeAxisViewItem::reset_width_dependent_items (pixel_width);
 100
 101         active_changed ();
 102
 103         if (pixel_width < 5) {
 104                 fade_in->hide();
 105                 fade_out->hide();
 106         }
 107 }
 108
 109 void
 110 CrossfadeView::set_height (double height)
 111 {
 112         double h = 0;
 113         if (height <= TimeAxisView::hSmaller) {
 114                 h = height - 3;
 115         } else {
 116                 h = height - NAME_HIGHLIGHT_SIZE - 3;
 117         }
 118
 119         TimeAxisViewItem::set_height (h);
 120
 121         _height = h;
 122         redraw_curves ();
 123 }
 124
 125 void
 126 CrossfadeView::crossfade_changed (Change what_changed)
 127 {
 128         bool need_redraw_curves = false;
 129
 130         if (what_changed & BoundsChanged) {
 131                 set_position (crossfade->position(), this);
 132                 set_duration (crossfade->length(), this);
 133
 134                 /* set_duration will call reset_width_dependent_items which in turn will call redraw_curves via active_changed,
 135                    so no need for us to call it */
 136                 need_redraw_curves = false;
 137         }
 138
 139         if (what_changed & Crossfade::FollowOverlapChanged) {
 140                 need_redraw_curves = true;
 141         }
 142
 143         if (what_changed & Crossfade::ActiveChanged) {
 144                 /* calls redraw_curves */
 145                 active_changed ();
 146         } else if (need_redraw_curves) {
 147                 redraw_curves ();
 148         }
 149 }
 150
 151 void
 152 CrossfadeView::redraw_curves ()
 153 {
 154         Points* points;
 155         int32_t npoints;
 156         float* vec;
 157
 158         if (!crossfade->following_overlap()) {
 159                 /* curves should not be visible */
 160                 fade_in->hide ();
 161                 fade_out->hide ();
 162                 return;
 163         }
 164
 165         if (_height < 0) {
 166                 /* no space allocated yet */
 167                 return;
 168         }
 169
 170         npoints = get_time_axis_view().editor().frame_to_pixel (crossfade->length());
 171         // npoints = std::min (gdk_screen_width(), npoints);
 172
 173         if (!_visible || !crossfade->active() || npoints < 3) {
 174                 fade_in->hide();
 175                 fade_out->hide();
 176                 return;
 177         } else {
 178                 fade_in->show();
 179                 fade_out->show();
 180         }
 181
 182         points = get_canvas_points ("xfade edit redraw", npoints);
 183         vec = new float[npoints];
 184
 185         crossfade->fade_in().curve().get_vector (0, crossfade->length(), vec, npoints);
 186
 187         for (int i = 0, pci = 0; i < npoints; ++i) {
 188                 Art::Point &p = (*points)[pci++];
 189                 p.set_x(i);
 190                 p.set_y(2.0 + _height - (_height * vec[i]));
 191         }
 192         fade_in->property_points() = *points;
 193
 194         crossfade->fade_out().curve().get_vector (0, crossfade->length(), vec, npoints);
 195         for (int i = 0, pci = 0; i < npoints; ++i) {
 196                 Art::Point &p = (*points)[pci++];
 197                 p.set_x(i);
 198                 p.set_y(2.0 + _height - (_height * vec[i]));
 199         }
 200         fade_out->property_points() = *points;
 201
 202         delete [] vec;
 203
 204         delete points;
 205
 206         /* XXX this is ugly, but it will have to wait till Crossfades are reimplented
 207            as regions. This puts crossfade views on top of a track, above all regions.
 208         */
 209
 210         group->raise_to_top();
 211 }
 212
 213 void
 214 CrossfadeView::active_changed ()
 215 {
 216         if (crossfade->active()) {
 217                 frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_ActiveCrossfade.get();
 218         } else {
 219                 frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_InactiveCrossfade.get();
 220         }
 221
 222         redraw_curves ();
 223 }
 224
 225 void
 226 CrossfadeView::color_handler ()
 227 {
 228         active_changed ();
 229 }
 230
 231 void
 232 CrossfadeView::set_valid (bool yn)
 233 {
 234         _valid = yn;
 235 }
 236
 237 AudioRegionView&
 238 CrossfadeView::upper_regionview () const
 239 {
 240         if (left_view.region()->layer() > right_view.region()->layer()) {
 241                 return left_view;
 242         } else {
 243                 return right_view;
 244         }
 245 }
 246
 247 void
 248 CrossfadeView::show ()
 249 {
 250         group->show();
 251         _visible = true;
 252 }
 253
 254 void
 255 CrossfadeView::hide ()
 256 {
 257         group->hide();
 258         _visible = false;
 259 }
 260
 261 void
 262 CrossfadeView::fake_hide ()
 263 {
 264         group->hide();
 265 }
 266