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