gtk2_ardour/time_axis_view.cc

   1 /*
   2     Copyright (C) 2000 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 <cstdlib>
  21 #include <cmath>
  22 #include <algorithm>
  23 #include <string>
  24 #include <list>
  25
  26 #include <libgnomecanvasmm.h>
  27 #include <libgnomecanvasmm/canvas.h>
  28 #include <libgnomecanvasmm/item.h>
  29
  30 #include "pbd/error.h"
  31
  32 #include <gtkmm2ext/utils.h>
  33 #include <gtkmm2ext/selector.h>
  34 #include <gtkmm2ext/stop_signal.h>
  35
  36 #include "ardour/session.h"
  37 #include "ardour/utils.h"
  38 #include "ardour/ladspa_plugin.h"
  39 #include "ardour/processor.h"
  40 #include "ardour/location.h"
  41
  42 #include "ardour_ui.h"
  43 #include "gui_thread.h"
  44 #include "public_editor.h"
  45 #include "time_axis_view.h"
  46 #include "region_view.h"
  47 #include "ghostregion.h"
  48 #include "simplerect.h"
  49 #include "simpleline.h"
  50 #include "selection.h"
  51 #include "keyboard.h"
  52 #include "rgb_macros.h"
  53 #include "utils.h"
  54 #include "streamview.h"
  55
  56 #include "i18n.h"
  57
  58 using namespace std;
  59 using namespace Gtk;
  60 using namespace Gdk;
  61 using namespace ARDOUR;
  62 using namespace PBD;
  63 using namespace Editing;
  64 using namespace ArdourCanvas;
  65 using Gtkmm2ext::Keyboard;
  66
  67 const double trim_handle_size = 6.0; /* pixels */
  68
  69 uint32_t TimeAxisView::hLargest = 0;
  70 uint32_t TimeAxisView::hLarge = 0;
  71 uint32_t TimeAxisView::hLarger = 0;
  72 uint32_t TimeAxisView::hNormal = 0;
  73 uint32_t TimeAxisView::hSmaller = 0;
  74 uint32_t TimeAxisView::hSmall = 0;
  75 bool TimeAxisView::need_size_info = true;
  76 int const TimeAxisView::_max_order = 512;
  77 PBD::Signal1<void,TimeAxisView*> TimeAxisView::CatchDeletion;
  78
  79 TimeAxisView::TimeAxisView (ARDOUR::Session* sess, PublicEditor& ed, TimeAxisView* rent, Canvas& /*canvas*/)
  80         : AxisView (sess),
  81           controls_table (2, 8),
  82           _y_position (0),
  83           _editor (ed),
  84           _order (0)
  85 {
  86         if (need_size_info) {
  87                 compute_controls_size_info ();
  88                 need_size_info = false;
  89         }
  90         _canvas_background = new Group (*ed.get_background_group (), 0.0, 0.0);
  91         _canvas_display = new Group (*ed.get_trackview_group (), 0.0, 0.0);
  92         _canvas_display->hide(); // reveal as needed
  93
  94         selection_group = new Group (*_canvas_display);
  95         selection_group->hide();
  96
  97         _ghost_group = new Group (*_canvas_display);
  98         _ghost_group->lower_to_bottom();
  99         _ghost_group->show();
 100
 101         control_parent = 0;
 102         display_menu = 0;
 103         size_menu = 0;
 104         _hidden = false;
 105         in_destructor = false;
 106         height = 0;
 107         _effective_height = 0;
 108         parent = rent;
 109         _has_state = false;
 110         last_name_entry_key_press_event = 0;
 111         name_packing = NamePackingBits (0);
 112         _resize_drag_start = -1;
 113
 114         /*
 115           Create the standard LHS Controls
 116           We create the top-level container and name add the name label here,
 117           subclasses can add to the layout as required
 118         */
 119
 120         name_entry.set_name ("EditorTrackNameDisplay");
 121         name_entry.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_release));
 122         name_entry.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_press));
 123         name_entry.signal_key_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_release));
 124         name_entry.signal_activate().connect (sigc::mem_fun(*this, &TimeAxisView::name_entry_activated));
 125         name_entry.signal_focus_in_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_in));
 126         name_entry.signal_focus_out_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_out));
 127         Gtkmm2ext::set_size_request_to_display_given_text (name_entry, N_("gTortnam"), 10, 10); // just represents a short name
 128
 129         name_label.set_name ("TrackLabel");
 130         name_label.set_alignment (0.0, 0.5);
 131
 132         /* typically, either name_label OR name_entry are visible,
 133            but not both. its up to derived classes to show/hide them as they
 134            wish.
 135         */
 136
 137         name_hbox.show ();
 138
 139         controls_table.set_size_request (200);
 140         controls_table.set_border_width (2);
 141         controls_table.set_row_spacings (0);
 142         controls_table.set_col_spacings (0);
 143         controls_table.set_homogeneous (true);
 144
 145         controls_table.attach (name_hbox, 0, 5, 0, 1,  Gtk::FILL|Gtk::EXPAND,  Gtk::FILL|Gtk::EXPAND, 3, 0);
 146         controls_table.show_all ();
 147         controls_table.set_no_show_all ();
 148
 149         resizer.set_size_request (10, 10);
 150         resizer.set_name ("ResizeHandle");
 151         resizer.signal_expose_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_expose));
 152         resizer.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_press));
 153         resizer.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_release));
 154         resizer.signal_motion_notify_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_motion));
 155         resizer.set_events (Gdk::BUTTON_PRESS_MASK|
 156                         Gdk::BUTTON_RELEASE_MASK|
 157                         Gdk::POINTER_MOTION_MASK|
 158                         Gdk::SCROLL_MASK);
 159
 160         resizer_box.pack_start (resizer, false, false);
 161         resizer.show ();
 162         resizer_box.show();
 163
 164         HSeparator* separator = manage (new HSeparator());
 165
 166         controls_vbox.pack_start (controls_table, false, false);
 167         controls_vbox.pack_end (*separator, false, false);
 168         controls_vbox.pack_end (resizer_box, false, true);
 169         controls_vbox.show ();
 170
 171         //controls_ebox.set_name ("TimeAxisViewControlsBaseUnselected");
 172         controls_ebox.add (controls_vbox);
 173         controls_ebox.add_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK|SCROLL_MASK);
 174         controls_ebox.set_flags (CAN_FOCUS);
 175
 176         controls_ebox.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_button_release));
 177         controls_ebox.signal_scroll_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_scroll), true);
 178
 179         controls_hbox.pack_start (controls_ebox,true,true);
 180         controls_hbox.show ();
 181
 182         ColorsChanged.connect (sigc::mem_fun (*this, &TimeAxisView::color_handler));
 183
 184         GhostRegion::CatchDeletion.connect (*this, ui_bind (&TimeAxisView::erase_ghost, this, _1), gui_context());
 185 }
 186
 187 TimeAxisView::~TimeAxisView()
 188 {
 189         in_destructor = true;
 190
 191         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 192                 delete *i;
 193         }
 194
 195         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 196                 delete (*i)->rect;
 197                 delete (*i)->start_trim;
 198                 delete (*i)->end_trim;
 199
 200         }
 201
 202         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 203                 delete (*i)->rect;
 204                 delete (*i)->start_trim;
 205                 delete (*i)->end_trim;
 206         }
 207
 208         for (list<SimpleLine*>::iterator i = feature_lines.begin(); i != feature_lines.end(); ++i) {
 209                 delete (*i);
 210         }
 211
 212         delete selection_group;
 213         selection_group = 0;
 214
 215         delete _canvas_background;
 216         _canvas_background = 0;
 217
 218         delete _canvas_display;
 219         _canvas_display = 0;
 220
 221         delete display_menu;
 222         display_menu = 0;
 223 }
 224
 225 /** Display this TimeAxisView as the nth component of the parent box, at y.
 226 *
 227 * @param y y position.
 228 * @param nth index for this TimeAxisView, increased if this view has children.
 229 * @param parent parent component.
 230 * @return height of this TimeAxisView.
 231 */
 232 guint32
 233 TimeAxisView::show_at (double y, int& nth, VBox *parent)
 234 {
 235         if (control_parent) {
 236                 control_parent->reorder_child (controls_hbox, nth);
 237         } else {
 238                 control_parent = parent;
 239                 parent->pack_start (controls_hbox, false, false);
 240                 parent->reorder_child (controls_hbox, nth);
 241         }
 242
 243         _order = nth;
 244
 245         if (_y_position != y) {
 246                 _canvas_display->property_y () = y;
 247                 _canvas_background->property_y () = y;
 248                 /* silly canvas */
 249                 _canvas_display->move (0.0, 0.0);
 250                 _canvas_background->move (0.0, 0.0);
 251                 _y_position = y;
 252
 253         }
 254
 255         _canvas_background->raise_to_top ();
 256         _canvas_display->raise_to_top ();
 257
 258         if (_marked_for_display) {
 259                 controls_hbox.show ();
 260                 controls_ebox.show ();
 261                 _canvas_background->show ();
 262         }
 263
 264         _hidden = false;
 265
 266         _effective_height = current_height ();
 267
 268         /* now show children */
 269
 270         cerr << name() << " has " << children.size() << " to show\n";
 271
 272         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 273                 if (canvas_item_visible ((*i)->_canvas_display)) {
 274                         ++nth;
 275                         _effective_height += (*i)->show_at (y + _effective_height, nth, parent);
 276                         cerr << "\tshowed " << (*i)->name() << " as " << nth << endl;
 277                 } else {
 278                         cerr << "\t" << (*i)->name() << " has an invisible canvas display\n";
 279                 }
 280         }
 281
 282         return _effective_height;
 283 }
 284
 285 void
 286 TimeAxisView::clip_to_viewport ()
 287 {
 288         if (_marked_for_display) {
 289                 if (_y_position + _effective_height < _editor.get_trackview_group_vertical_offset () || _y_position > _editor.get_trackview_group_vertical_offset () + _canvas_display->get_canvas()->get_height()) {
 290                         _canvas_background->hide ();
 291                         cerr << "Clip hides canvas display for " << name() << endl;
 292                         _canvas_display->hide ();
 293                         return;
 294                 }
 295                 cerr << "Clip shows canvas display for " << name() << endl;
 296                 _canvas_background->show ();
 297                 _canvas_display->show ();
 298         }
 299         return;
 300 }
 301
 302 bool
 303 TimeAxisView::controls_ebox_scroll (GdkEventScroll* ev)
 304 {
 305         if (Keyboard::some_magic_widget_has_focus()) {
 306                 return false;
 307         }
 308
 309         switch (ev->direction) {
 310         case GDK_SCROLL_UP:
 311                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 312                         step_height (true);
 313                         return true;
 314                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 315                         _editor.scroll_tracks_up_line();
 316                         return true;
 317                 }
 318                 break;
 319
 320         case GDK_SCROLL_DOWN:
 321                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 322                         step_height (false);
 323                         return true;
 324                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 325                         _editor.scroll_tracks_down_line();
 326                         return true;
 327                 }
 328                 break;
 329
 330         default:
 331                 /* no handling for left/right, yet */
 332                 break;
 333         }
 334
 335         return false;
 336 }
 337
 338 bool
 339 TimeAxisView::controls_ebox_button_release (GdkEventButton* ev)
 340 {
 341         switch (ev->button) {
 342         case 1:
 343                 selection_click (ev);
 344                 break;
 345
 346         case 3:
 347                 popup_display_menu (ev->time);
 348                 break;
 349         }
 350
 351         return true;
 352 }
 353
 354 void
 355 TimeAxisView::selection_click (GdkEventButton* ev)
 356 {
 357         Selection::Operation op = ArdourKeyboard::selection_type (ev->state);
 358         _editor.set_selected_track (*this, op, false);
 359 }
 360
 361 void
 362 TimeAxisView::hide ()
 363 {
 364         if (_hidden) {
 365                 return;
 366         }
 367
 368         _canvas_display->hide ();
 369         _canvas_background->hide ();
 370
 371         if (control_parent) {
 372                 control_parent->remove (controls_hbox);
 373                 control_parent = 0;
 374         }
 375
 376         _y_position = -1;
 377         _hidden = true;
 378
 379         /* now hide children */
 380
 381         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 382                 (*i)->hide ();
 383         }
 384
 385         /* if its hidden, it cannot be selected */
 386
 387         _editor.get_selection().remove (this);
 388
 389         Hiding ();
 390 }
 391
 392 void
 393 TimeAxisView::step_height (bool bigger)
 394 {
 395         static const uint32_t step = 20;
 396
 397         if (bigger) {
 398                 set_height (height + step);
 399         } else {
 400                 if (height > step) {
 401                         set_height (std::max (height - step, hSmall));
 402                 } else if (height != hSmall) {
 403                         set_height (hSmall);
 404                 }
 405         }
 406 }
 407
 408 void
 409 TimeAxisView::set_heights (uint32_t h)
 410 {
 411         TrackSelection& ts (_editor.get_selection().tracks);
 412
 413         for (TrackSelection::iterator i = ts.begin(); i != ts.end(); ++i) {
 414                 (*i)->set_height (h);
 415         }
 416 }
 417
 418 void
 419 TimeAxisView::set_height(uint32_t h)
 420 {
 421         controls_ebox.property_height_request () = h;
 422         height = h;
 423
 424         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 425                 (*i)->set_height ();
 426         }
 427
 428         if (canvas_item_visible (selection_group)) {
 429                 /* resize the selection rect */
 430                 show_selection (_editor.get_selection().time);
 431         }
 432
 433         reshow_feature_lines ();
 434 }
 435
 436 bool
 437 TimeAxisView::name_entry_key_release (GdkEventKey* ev)
 438 {
 439         TrackViewList::iterator i;
 440
 441         switch (ev->keyval) {
 442         case GDK_Escape:
 443                 name_entry.select_region (0,0);
 444                 controls_ebox.grab_focus ();
 445                 name_entry_changed ();
 446                 return true;
 447
 448         /* Shift+Tab Keys Pressed. Note that for Shift+Tab, GDK actually
 449          * generates a different ev->keyval, rather than setting
 450          * ev->state.
 451          */
 452         case GDK_ISO_Left_Tab:
 453         case GDK_Tab:
 454         {
 455                 name_entry_changed ();
 456                 TrackViewList const & allviews = _editor.get_track_views ();
 457                 TrackViewList::const_iterator i = find (allviews.begin(), allviews.end(), this);
 458                 if (ev->keyval == GDK_Tab) {
 459                         if (i != allviews.end()) {
 460                                 do {
 461                                         if (++i == allviews.end()) {
 462                                                 return true;
 463                                         }
 464                                 } while((*i)->hidden());
 465                         }
 466                 } else {
 467                         if (i != allviews.begin()) {
 468                                 do {
 469                                         if (i == allviews.begin()) {
 470                                                 return true;
 471                                         }
 472                                         --i;
 473                                 } while ((*i)->hidden());
 474                         }
 475                 }
 476
 477
 478                 /* resize to show editable name display */
 479
 480                 if ((*i)->current_height() <= hSmaller) {
 481                         (*i)->set_height (hSmaller);
 482                 }
 483
 484                 (*i)->name_entry.grab_focus();
 485         }
 486         return true;
 487
 488         case GDK_Up:
 489         case GDK_Down:
 490                 name_entry_changed ();
 491                 return true;
 492
 493         default:
 494                 break;
 495         }
 496
 497 #ifdef TIMEOUT_NAME_EDIT
 498         /* adapt the timeout to reflect the user's typing speed */
 499
 500         guint32 name_entry_timeout;
 501
 502         if (last_name_entry_key_press_event) {
 503                 /* timeout is 1/2 second or 5 times their current inter-char typing speed */
 504                 name_entry_timeout = std::max (500U, (5 * (ev->time - last_name_entry_key_press_event)));
 505         } else {
 506                 /* start with a 1 second timeout */
 507                 name_entry_timeout = 1000;
 508         }
 509
 510         last_name_entry_key_press_event = ev->time;
 511
 512         /* wait 1 seconds and if no more keys are pressed, act as if they pressed enter */
 513
 514         name_entry_key_timeout.disconnect();
 515         name_entry_key_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_timed_out), name_entry_timeout);
 516 #endif
 517
 518         return false;
 519 }
 520
 521 bool
 522 TimeAxisView::name_entry_focus_in (GdkEventFocus*)
 523 {
 524         name_entry.select_region (0, -1);
 525         name_entry.set_name ("EditorActiveTrackNameDisplay");
 526         return false;
 527 }
 528
 529 bool
 530 TimeAxisView::name_entry_focus_out (GdkEventFocus*)
 531 {
 532         /* clean up */
 533
 534         last_name_entry_key_press_event = 0;
 535         name_entry_key_timeout.disconnect ();
 536         name_entry.set_name ("EditorTrackNameDisplay");
 537         name_entry.select_region (0,0);
 538
 539         /* do the real stuff */
 540
 541         name_entry_changed ();
 542
 543         return false;
 544 }
 545
 546 bool
 547 TimeAxisView::name_entry_key_timed_out ()
 548 {
 549         name_entry_activated();
 550         return false;
 551 }
 552
 553 void
 554 TimeAxisView::name_entry_activated ()
 555 {
 556         controls_ebox.grab_focus();
 557 }
 558
 559 void
 560 TimeAxisView::name_entry_changed ()
 561 {
 562 }
 563
 564 bool
 565 TimeAxisView::name_entry_button_press (GdkEventButton *ev)
 566 {
 567         if (ev->button == 3) {
 568                 return true;
 569         }
 570         return false;
 571 }
 572
 573 bool
 574 TimeAxisView::name_entry_button_release (GdkEventButton *ev)
 575 {
 576         if (ev->button == 3) {
 577                 popup_display_menu (ev->time);
 578                 return true;
 579         }
 580         return false;
 581 }
 582
 583 void
 584 TimeAxisView::conditionally_add_to_selection ()
 585 {
 586         Selection& s (_editor.get_selection ());
 587
 588         if (!s.selected (this)) {
 589                 _editor.set_selected_track (*this, Selection::Set);
 590         }
 591 }
 592
 593 void
 594 TimeAxisView::popup_display_menu (guint32 when)
 595 {
 596         if (display_menu == 0) {
 597                 build_display_menu ();
 598         }
 599
 600         conditionally_add_to_selection ();
 601         display_menu->popup (1, when);
 602 }
 603
 604 gint
 605 TimeAxisView::size_click (GdkEventButton *ev)
 606 {
 607         conditionally_add_to_selection ();
 608         popup_size_menu (ev->time);
 609         return TRUE;
 610 }
 611
 612 void
 613 TimeAxisView::popup_size_menu (guint32 when)
 614 {
 615         if (size_menu == 0) {
 616                 build_size_menu ();
 617         }
 618         size_menu->popup (1, when);
 619 }
 620
 621 void
 622 TimeAxisView::set_selected (bool yn)
 623 {
 624         if (yn == _selected) {
 625                 return;
 626         }
 627
 628         Selectable::set_selected (yn);
 629
 630         if (_selected) {
 631                 controls_ebox.set_name (controls_base_selected_name);
 632                 controls_hbox.set_name (controls_base_selected_name);
 633                 controls_vbox.set_name (controls_base_selected_name);
 634         } else {
 635                 controls_ebox.set_name (controls_base_unselected_name);
 636                 controls_hbox.set_name (controls_base_unselected_name);
 637                 controls_vbox.set_name (controls_base_unselected_name);
 638                 hide_selection ();
 639
 640                 /* children will be set for the yn=true case. but when deselecting
 641                    the editor only has a list of top-level trackviews, so we
 642                    have to do this here.
 643                 */
 644
 645                 for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 646                         (*i)->set_selected (false);
 647                 }
 648         }
 649
 650         resizer.queue_draw ();
 651 }
 652
 653 void
 654 TimeAxisView::build_size_menu ()
 655 {
 656         using namespace Menu_Helpers;
 657
 658         size_menu = new Menu;
 659         size_menu->set_name ("ArdourContextMenu");
 660         MenuList& items = size_menu->items();
 661
 662         items.push_back (MenuElem (_("Largest"), sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_heights), hLargest)));
 663         items.push_back (MenuElem (_("Large"), sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_heights), hLarge)));
 664         items.push_back (MenuElem (_("Larger"), sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_heights), hLarger)));
 665         items.push_back (MenuElem (_("Normal"), sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_heights), hNormal)));
 666         items.push_back (MenuElem (_("Smaller"), sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_heights),hSmaller)));
 667         items.push_back (MenuElem (_("Small"), sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_heights), hSmall)));
 668 }
 669
 670 void
 671 TimeAxisView::build_display_menu ()
 672 {
 673         using namespace Menu_Helpers;
 674
 675         delete display_menu;
 676
 677         display_menu = new Menu;
 678         display_menu->set_name ("ArdourContextMenu");
 679
 680         // Just let implementing classes define what goes into the manu
 681 }
 682
 683 void
 684 TimeAxisView::set_samples_per_unit (double spu)
 685 {
 686         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 687                 (*i)->set_samples_per_unit (spu);
 688         }
 689
 690         AnalysisFeatureList::const_iterator i;
 691         list<ArdourCanvas::SimpleLine*>::iterator l;
 692
 693         for (i = analysis_features.begin(), l = feature_lines.begin(); i != analysis_features.end() && l != feature_lines.end(); ++i, ++l) {
 694                 (*l)->property_x1() = _editor.frame_to_pixel (*i);
 695                 (*l)->property_x2() = _editor.frame_to_pixel (*i);
 696         }
 697 }
 698
 699 void
 700 TimeAxisView::show_timestretch (nframes_t start, nframes_t end)
 701 {
 702         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 703                 (*i)->show_timestretch (start, end);
 704         }
 705 }
 706
 707 void
 708 TimeAxisView::hide_timestretch ()
 709 {
 710         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 711                 (*i)->hide_timestretch ();
 712         }
 713 }
 714
 715 void
 716 TimeAxisView::show_selection (TimeSelection& ts)
 717 {
 718         double x1;
 719         double x2;
 720         double y2;
 721         SelectionRect *rect;
 722
 723         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 724                 (*i)->show_selection (ts);
 725         }
 726
 727         if (canvas_item_visible (selection_group)) {
 728                 while (!used_selection_rects.empty()) {
 729                         free_selection_rects.push_front (used_selection_rects.front());
 730                         used_selection_rects.pop_front();
 731                         free_selection_rects.front()->rect->hide();
 732                         free_selection_rects.front()->start_trim->hide();
 733                         free_selection_rects.front()->end_trim->hide();
 734                 }
 735                 selection_group->hide();
 736         }
 737
 738         selection_group->show();
 739         selection_group->raise_to_top();
 740
 741         for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
 742                 nframes_t start, end, cnt;
 743
 744                 start = (*i).start;
 745                 end = (*i).end;
 746                 cnt = end - start + 1;
 747
 748                 rect = get_selection_rect ((*i).id);
 749
 750                 x1 = _editor.frame_to_unit (start);
 751                 x2 = _editor.frame_to_unit (start + cnt - 1);
 752                 y2 = current_height();
 753
 754                 rect->rect->property_x1() = x1;
 755                 rect->rect->property_y1() = 1.0;
 756                 rect->rect->property_x2() = x2;
 757                 rect->rect->property_y2() = y2;
 758
 759                 // trim boxes are at the top for selections
 760
 761                 if (x2 > x1) {
 762                         rect->start_trim->property_x1() = x1;
 763                         rect->start_trim->property_y1() = 1.0;
 764                         rect->start_trim->property_x2() = x1 + trim_handle_size;
 765                         rect->start_trim->property_y2() = 1.0 + trim_handle_size;
 766
 767                         rect->end_trim->property_x1() = x2 - trim_handle_size;
 768                         rect->end_trim->property_y1() = 1.0;
 769                         rect->end_trim->property_x2() = x2;
 770                         rect->end_trim->property_y2() = 1.0 + trim_handle_size;
 771
 772                         rect->start_trim->show();
 773                         rect->end_trim->show();
 774                 } else {
 775                         rect->start_trim->hide();
 776                         rect->end_trim->hide();
 777                 }
 778
 779                 rect->rect->show ();
 780                 used_selection_rects.push_back (rect);
 781         }
 782 }
 783
 784 void
 785 TimeAxisView::reshow_selection (TimeSelection& ts)
 786 {
 787         show_selection (ts);
 788
 789         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 790                 (*i)->show_selection (ts);
 791         }
 792 }
 793
 794 void
 795 TimeAxisView::hide_selection ()
 796 {
 797         if (canvas_item_visible (selection_group)) {
 798                 while (!used_selection_rects.empty()) {
 799                         free_selection_rects.push_front (used_selection_rects.front());
 800                         used_selection_rects.pop_front();
 801                         free_selection_rects.front()->rect->hide();
 802                         free_selection_rects.front()->start_trim->hide();
 803                         free_selection_rects.front()->end_trim->hide();
 804                 }
 805                 selection_group->hide();
 806         }
 807
 808         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 809                 (*i)->hide_selection ();
 810         }
 811 }
 812
 813 void
 814 TimeAxisView::order_selection_trims (ArdourCanvas::Item *item, bool put_start_on_top)
 815 {
 816         /* find the selection rect this is for. we have the item corresponding to one
 817            of the trim handles.
 818          */
 819
 820         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 821                 if ((*i)->start_trim == item || (*i)->end_trim == item) {
 822
 823                         /* make one trim handle be "above" the other so that if they overlap,
 824                            the top one is the one last used.
 825                         */
 826
 827                         (*i)->rect->raise_to_top ();
 828                         (put_start_on_top ? (*i)->start_trim : (*i)->end_trim)->raise_to_top ();
 829                         (put_start_on_top ? (*i)->end_trim : (*i)->start_trim)->raise_to_top ();
 830
 831                         break;
 832                 }
 833         }
 834 }
 835
 836 SelectionRect *
 837 TimeAxisView::get_selection_rect (uint32_t id)
 838 {
 839         SelectionRect *rect;
 840
 841         /* check to see if we already have a visible rect for this particular selection ID */
 842
 843         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 844                 if ((*i)->id == id) {
 845                         return (*i);
 846                 }
 847         }
 848
 849         /* ditto for the free rect list */
 850
 851         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 852                 if ((*i)->id == id) {
 853                         SelectionRect* ret = (*i);
 854                         free_selection_rects.erase (i);
 855                         return ret;
 856                 }
 857         }
 858
 859         /* no existing matching rect, so go get a new one from the free list, or create one if there are none */
 860
 861         if (free_selection_rects.empty()) {
 862
 863                 rect = new SelectionRect;
 864
 865                 rect->rect = new SimpleRect (*selection_group);
 866                 rect->rect->property_x1() = 0.0;
 867                 rect->rect->property_y1() = 0.0;
 868                 rect->rect->property_x2() = 0.0;
 869                 rect->rect->property_y2() = 0.0;
 870                 rect->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
 871                 rect->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
 872
 873                 rect->start_trim = new SimpleRect (*selection_group);
 874                 rect->start_trim->property_x1() = 0.0;
 875                 rect->start_trim->property_x2() = 0.0;
 876                 rect->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
 877                 rect->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
 878
 879                 rect->end_trim = new SimpleRect (*selection_group);
 880                 rect->end_trim->property_x1() = 0.0;
 881                 rect->end_trim->property_x2() = 0.0;
 882                 rect->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
 883                 rect->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
 884
 885                 free_selection_rects.push_front (rect);
 886
 887                 rect->rect->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_rect_event), rect->rect, rect));
 888                 rect->start_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_start_trim_event), rect->rect, rect));
 889                 rect->end_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_end_trim_event), rect->rect, rect));
 890         }
 891
 892         rect = free_selection_rects.front();
 893         rect->id = id;
 894         free_selection_rects.pop_front();
 895         return rect;
 896 }
 897
 898 struct null_deleter { void operator()(void const *) const {} };
 899
 900 bool
 901 TimeAxisView::is_child (TimeAxisView* tav)
 902 {
 903         return find (children.begin(), children.end(), boost::shared_ptr<TimeAxisView>(tav, null_deleter())) != children.end();
 904 }
 905
 906 void
 907 TimeAxisView::add_child (boost::shared_ptr<TimeAxisView> child)
 908 {
 909         children.push_back (child);
 910 }
 911
 912 void
 913 TimeAxisView::remove_child (boost::shared_ptr<TimeAxisView> child)
 914 {
 915         Children::iterator i;
 916
 917         if ((i = find (children.begin(), children.end(), child)) != children.end()) {
 918                 children.erase (i);
 919         }
 920 }
 921
 922 void
 923 TimeAxisView::get_selectables (nframes_t /*start*/, nframes_t /*end*/, double /*top*/, double /*bot*/, list<Selectable*>& /*result*/)
 924 {
 925         return;
 926 }
 927
 928 void
 929 TimeAxisView::get_inverted_selectables (Selection& /*sel*/, list<Selectable*>& /*result*/)
 930 {
 931         return;
 932 }
 933
 934 void
 935 TimeAxisView::add_ghost (RegionView* rv)
 936 {
 937         GhostRegion* gr = rv->add_ghost (*this);
 938
 939         if(gr) {
 940                 ghosts.push_back(gr);
 941         }
 942 }
 943
 944 void
 945 TimeAxisView::remove_ghost (RegionView* rv)
 946 {
 947         rv->remove_ghost_in (*this);
 948 }
 949
 950 void
 951 TimeAxisView::erase_ghost (GhostRegion* gr)
 952 {
 953         if (in_destructor) {
 954                 return;
 955         }
 956
 957         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 958                 if ((*i) == gr) {
 959                         ghosts.erase (i);
 960                         break;
 961                 }
 962         }
 963 }
 964
 965 bool
 966 TimeAxisView::touched (double top, double bot)
 967 {
 968         /* remember: this is X Window - coordinate space starts in upper left and moves down.
 969           y_position is the "origin" or "top" of the track.
 970         */
 971
 972         double mybot = _y_position + current_height();
 973
 974         return ((_y_position <= bot && _y_position >= top) ||
 975                 ((mybot <= bot) && (top < mybot)) ||
 976                 (mybot >= bot && _y_position < top));
 977 }
 978
 979 void
 980 TimeAxisView::set_parent (TimeAxisView& p)
 981 {
 982         parent = &p;
 983 }
 984
 985 bool
 986 TimeAxisView::has_state () const
 987 {
 988         return _has_state;
 989 }
 990
 991 TimeAxisView*
 992 TimeAxisView::get_parent_with_state ()
 993 {
 994         if (parent == 0) {
 995                 return 0;
 996         }
 997
 998         if (parent->has_state()) {
 999                 return parent;
1000         }
1001
1002         return parent->get_parent_with_state ();
1003 }
1004
1005
1006 XMLNode&
1007 TimeAxisView::get_state ()
1008 {
1009         XMLNode* node = new XMLNode ("TAV-" + name());
1010         char buf[32];
1011
1012         snprintf (buf, sizeof(buf), "%u", height);
1013         node->add_property ("height", buf);
1014         node->add_property ("marked-for-display", (_marked_for_display ? "1" : "0"));
1015         return *node;
1016 }
1017
1018 int
1019 TimeAxisView::set_state (const XMLNode& node, int /*version*/)
1020 {
1021         const XMLProperty *prop;
1022
1023         if ((prop = node.property ("marked-for-display")) != 0) {
1024                 _marked_for_display = (prop->value() == "1");
1025         }
1026
1027         if ((prop = node.property ("track-height")) != 0) {
1028
1029                 if (prop->value() == "largest") {
1030                         set_height (hLargest);
1031                 } else if (prop->value() == "large") {
1032                         set_height (hLarge);
1033                 } else if (prop->value() == "larger") {
1034                         set_height (hLarger);
1035                 } else if (prop->value() == "normal") {
1036                         set_height (hNormal);
1037                 } else if (prop->value() == "smaller") {
1038                         set_height (hSmaller);
1039                 } else if (prop->value() == "small") {
1040                         set_height (hSmall);
1041                 } else {
1042                         error << string_compose(_("unknown track height name \"%1\" in XML GUI information"), prop->value()) << endmsg;
1043                         set_height (Normal);
1044                 }
1045
1046         } else if ((prop = node.property ("height")) != 0) {
1047
1048                 set_height (atoi (prop->value()));
1049
1050         } else {
1051
1052                 set_height (hNormal);
1053         }
1054
1055         return 0;
1056 }
1057
1058 void
1059 TimeAxisView::reset_height()
1060 {
1061         set_height (height);
1062
1063         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
1064                 (*i)->set_height ((*i)->height);
1065         }
1066 }
1067
1068 void
1069 TimeAxisView::compute_controls_size_info ()
1070 {
1071         Gtk::Window window (Gtk::WINDOW_TOPLEVEL);
1072         Gtk::Table two_row_table (2, 8);
1073         Gtk::Table one_row_table (1, 8);
1074         Button* buttons[5];
1075         const int border_width = 2;
1076         const int extra_height = (2 * border_width)
1077                 //+ 2   // 2 pixels for the hseparator between TimeAxisView control areas
1078                 + 10; // resizer button (3 x 2 pixel elements + 2 x 2 pixel gaps)
1079
1080         window.add (one_row_table);
1081
1082         one_row_table.set_border_width (border_width);
1083         one_row_table.set_row_spacings (0);
1084         one_row_table.set_col_spacings (0);
1085         one_row_table.set_homogeneous (true);
1086
1087         two_row_table.set_border_width (border_width);
1088         two_row_table.set_row_spacings (0);
1089         two_row_table.set_col_spacings (0);
1090         two_row_table.set_homogeneous (true);
1091
1092         for (int i = 0; i < 5; ++i) {
1093                 buttons[i] = manage (new Button (X_("f")));
1094                 buttons[i]->set_name ("TrackMuteButton");
1095         }
1096
1097         one_row_table.attach (*buttons[0], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1098
1099         one_row_table.show_all ();
1100         Gtk::Requisition req(one_row_table.size_request ());
1101
1102
1103         // height required to show 1 row of buttons
1104
1105         hSmaller = req.height + extra_height;
1106
1107         window.remove ();
1108         window.add (two_row_table);
1109
1110         two_row_table.attach (*buttons[1], 5, 6, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1111         two_row_table.attach (*buttons[2], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1112         two_row_table.attach (*buttons[3], 7, 8, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1113         two_row_table.attach (*buttons[4], 8, 9, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1114
1115         two_row_table.show_all ();
1116         req = two_row_table.size_request ();
1117
1118         // height required to show all normal buttons
1119
1120         hNormal = /*req.height*/ 48 + extra_height;
1121
1122         // these heights are all just larger than normal. no more
1123         // elements are visible (yet).
1124
1125         hLarger = hNormal + 50;
1126         hLarge = hNormal + 150;
1127         hLargest = hNormal + 250;
1128
1129         // height required to show track name
1130
1131         hSmall = 27;
1132 }
1133
1134 void
1135 TimeAxisView::show_name_label ()
1136 {
1137         if (!(name_packing & NameLabelPacked)) {
1138                 name_hbox.pack_start (name_label, true, true);
1139                 name_packing = NamePackingBits (name_packing | NameLabelPacked);
1140                 name_hbox.show ();
1141                 name_label.show ();
1142         }
1143 }
1144
1145 void
1146 TimeAxisView::show_name_entry ()
1147 {
1148         if (!(name_packing & NameEntryPacked)) {
1149                 name_hbox.pack_start (name_entry, true, true);
1150                 name_packing = NamePackingBits (name_packing | NameEntryPacked);
1151                 name_hbox.show ();
1152                 name_entry.show ();
1153         }
1154 }
1155
1156 void
1157 TimeAxisView::hide_name_label ()
1158 {
1159         if (name_packing & NameLabelPacked) {
1160                 name_hbox.remove (name_label);
1161                 name_packing = NamePackingBits (name_packing & ~NameLabelPacked);
1162         }
1163 }
1164
1165 void
1166 TimeAxisView::hide_name_entry ()
1167 {
1168         if (name_packing & NameEntryPacked) {
1169                 name_hbox.remove (name_entry);
1170                 name_packing = NamePackingBits (name_packing & ~NameEntryPacked);
1171         }
1172 }
1173
1174 void
1175 TimeAxisView::color_handler ()
1176 {
1177         for (list<GhostRegion*>::iterator i=ghosts.begin(); i != ghosts.end(); i++ ) {
1178                 (*i)->set_colors();
1179         }
1180
1181         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
1182
1183                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1184                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1185
1186                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1187                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1188
1189                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1190                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1191         }
1192
1193         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
1194
1195                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1196                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1197
1198                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1199                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1200
1201                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1202                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1203         }
1204 }
1205
1206 /** @return Pair: TimeAxisView, layer index.
1207  * TimeAxisView is non-0 if this object covers y, or one of its children does.
1208  * If the covering object is a child axis, then the child is returned.
1209  * TimeAxisView is 0 otherwise.
1210  * Layer index is the layer number if the TimeAxisView is valid and is in stacked
1211  * region display mode, otherwise 0.
1212  */
1213 std::pair<TimeAxisView*, layer_t>
1214 TimeAxisView::covers_y_position (double y)
1215 {
1216         if (hidden()) {
1217                 return std::make_pair ( (TimeAxisView *) 0, 0);
1218         }
1219
1220         if (_y_position <= y && y < (_y_position + height)) {
1221
1222                 /* work out the layer index if appropriate */
1223                 layer_t l = 0;
1224                 if (layer_display () == Stacked && view ()) {
1225                         /* compute layer */
1226                         l = layer_t ((_y_position + height - y) / (view()->child_height ()));
1227                         /* clamp to max layers to be on the safe side; sometimes the above calculation
1228                           returns a too-high value */
1229                         if (l >= view()->layers ()) {
1230                                 l = view()->layers() - 1;
1231                         }
1232                 }
1233
1234                 return std::make_pair (this, l);
1235         }
1236
1237         for (Children::const_iterator i = children.begin(); i != children.end(); ++i) {
1238
1239                 std::pair<TimeAxisView*, int> const r = (*i)->covers_y_position (y);
1240                 if (r.first) {
1241                         return r;
1242                 }
1243         }
1244
1245         return std::make_pair ( (TimeAxisView *) 0, 0);
1246 }
1247
1248 void
1249 TimeAxisView::show_feature_lines (const AnalysisFeatureList& pos)
1250 {
1251         analysis_features = pos;
1252         reshow_feature_lines ();
1253 }
1254
1255
1256 void
1257 TimeAxisView::hide_feature_lines ()
1258 {
1259         list<ArdourCanvas::SimpleLine*>::iterator l;
1260
1261         for (l = feature_lines.begin(); l != feature_lines.end(); ++l) {
1262                 (*l)->hide();
1263         }
1264 }
1265
1266 void
1267 TimeAxisView::reshow_feature_lines ()
1268 {
1269         while (feature_lines.size()< analysis_features.size()) {
1270                 ArdourCanvas::SimpleLine* l = new ArdourCanvas::SimpleLine (*_canvas_display);
1271                 l->property_color_rgba() = (guint) ARDOUR_UI::config()->canvasvar_ZeroLine.get();
1272                 feature_lines.push_back (l);
1273         }
1274
1275         while (feature_lines.size() > analysis_features.size()) {
1276                 ArdourCanvas::SimpleLine *line = feature_lines.back();
1277                 feature_lines.pop_back ();
1278                 delete line;
1279         }
1280
1281         AnalysisFeatureList::const_iterator i;
1282         list<ArdourCanvas::SimpleLine*>::iterator l;
1283
1284         for (i = analysis_features.begin(), l = feature_lines.begin(); i != analysis_features.end() && l != feature_lines.end(); ++i, ++l) {
1285                 (*l)->property_x1() = _editor.frame_to_pixel (*i);
1286                 (*l)->property_x2() = _editor.frame_to_pixel (*i);
1287                 (*l)->property_y1() = 0;
1288                 (*l)->property_y2() = current_height();
1289                 (*l)->show ();
1290         }
1291 }
1292
1293 bool
1294 TimeAxisView::resizer_button_press (GdkEventButton* event)
1295 {
1296         _resize_drag_start = event->y_root;
1297         return true;
1298 }
1299
1300 bool
1301 TimeAxisView::resizer_button_release (GdkEventButton*)
1302 {
1303         _resize_drag_start = -1;
1304         return true;
1305 }
1306
1307 void
1308 TimeAxisView::idle_resize (uint32_t h)
1309 {
1310         set_height (h);
1311 }
1312
1313 bool
1314 TimeAxisView::resizer_motion (GdkEventMotion* ev)
1315 {
1316         if (_resize_drag_start < 0) {
1317                 return true;
1318         }
1319
1320         int32_t const delta = (int32_t) floor (ev->y_root - _resize_drag_start);
1321         _editor.add_to_idle_resize (this, delta);
1322         _resize_drag_start = ev->y_root;
1323
1324         return true;
1325 }
1326
1327 bool
1328 TimeAxisView::resizer_expose (GdkEventExpose* event)
1329 {
1330         int w, h, x, y, d;
1331         Glib::RefPtr<Gdk::Window> win (resizer.get_window());
1332         Glib::RefPtr<Gdk::GC> dark (resizer.get_style()->get_fg_gc (STATE_NORMAL));
1333         Glib::RefPtr<Gdk::GC> light (resizer.get_style()->get_bg_gc (STATE_NORMAL));
1334
1335         win->draw_rectangle (controls_ebox.get_style()->get_bg_gc(STATE_NORMAL),
1336                         true,
1337                         event->area.x,
1338                         event->area.y,
1339                         event->area.width,
1340                         event->area.height);
1341
1342         win->get_geometry (x, y, w, h, d);
1343
1344         /* handle/line #1 */
1345
1346         win->draw_line (dark, 0, 0, w - 2, 0);
1347         win->draw_point (dark, 0, 1);
1348         win->draw_line (light, 1, 1, w - 1, 1);
1349         win->draw_point (light, w - 1, 0);
1350
1351         /* handle/line #2 */
1352
1353         win->draw_line (dark, 0, 4, w - 2, 4);
1354         win->draw_point (dark, 0, 5);
1355         win->draw_line (light, 1, 5, w - 1, 5);
1356         win->draw_point (light, w - 1, 4);
1357
1358         /* handle/line #3 */
1359
1360         win->draw_line (dark, 0, 8, w - 2, 8);
1361         win->draw_point (dark, 0, 9);
1362         win->draw_line (light, 1, 9, w - 1, 9);
1363         win->draw_point (light, w - 1, 8);
1364
1365         return true;
1366 }
1367
1368 bool
1369 TimeAxisView::set_visibility (bool yn)
1370 {
1371         if (yn != marked_for_display()) {
1372                 if (yn) {
1373                         set_marked_for_display (true);
1374                         canvas_display()->show();
1375                 } else {
1376                         set_marked_for_display (false);
1377                         canvas_display()->hide ();
1378                 }
1379                 return true; // things changed
1380         }
1381
1382         return false;
1383 }