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
  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 "global_signals.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 #include "editor_drag.h"
  57
  58 #include "i18n.h"
  59
  60 using namespace std;
  61 using namespace Gtk;
  62 using namespace Gdk;
  63 using namespace ARDOUR;
  64 using namespace PBD;
  65 using namespace Editing;
  66 using namespace ArdourCanvas;
  67 using Gtkmm2ext::Keyboard;
  68
  69 const double trim_handle_size = 6.0; /* pixels */
  70 uint32_t TimeAxisView::extra_height;
  71 uint32_t TimeAxisView::smaller_height;
  72 int const TimeAxisView::_max_order = 512;
  73 PBD::Signal1<void,TimeAxisView*> TimeAxisView::CatchDeletion;
  74
  75 TimeAxisView::TimeAxisView (ARDOUR::Session* sess, PublicEditor& ed, TimeAxisView* rent, Canvas& /*canvas*/)
  76         : AxisView (sess),
  77           controls_table (2, 8),
  78           _y_position (0),
  79           _editor (ed),
  80           _order (0)
  81 {
  82         if (extra_height == 0) {
  83                 compute_heights ();
  84         }
  85
  86         _canvas_background = new Group (*ed.get_background_group (), 0.0, 0.0);
  87         _canvas_display = new Group (*ed.get_trackview_group (), 0.0, 0.0);
  88         _canvas_display->hide(); // reveal as needed
  89
  90         selection_group = new Group (*_canvas_display);
  91         selection_group->set_data (X_("timeselection"), (void *) 1);
  92         selection_group->hide();
  93
  94         _ghost_group = new Group (*_canvas_display);
  95         _ghost_group->lower_to_bottom();
  96         _ghost_group->show();
  97
  98         control_parent = 0;
  99         display_menu = 0;
 100         _hidden = false;
 101         in_destructor = false;
 102         height = 0;
 103         _effective_height = 0;
 104         parent = rent;
 105         _has_state = false;
 106         last_name_entry_key_press_event = 0;
 107         name_packing = NamePackingBits (0);
 108         _resize_drag_start = -1;
 109
 110         /*
 111           Create the standard LHS Controls
 112           We create the top-level container and name add the name label here,
 113           subclasses can add to the layout as required
 114         */
 115
 116         name_entry.set_name ("EditorTrackNameDisplay");
 117         name_entry.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_release));
 118         name_entry.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_press));
 119         name_entry.signal_key_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_release));
 120         name_entry.signal_activate().connect (sigc::mem_fun(*this, &TimeAxisView::name_entry_activated));
 121         name_entry.signal_focus_in_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_in));
 122         name_entry.signal_focus_out_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_out));
 123         Gtkmm2ext::set_size_request_to_display_given_text (name_entry, N_("gTortnam"), 10, 10); // just represents a short name
 124
 125         name_label.set_name ("TrackLabel");
 126         name_label.set_alignment (0.0, 0.5);
 127
 128         /* typically, either name_label OR name_entry are visible,
 129            but not both. its up to derived classes to show/hide them as they
 130            wish.
 131         */
 132
 133         name_hbox.show ();
 134
 135         controls_table.set_size_request (200);
 136         controls_table.set_border_width (2);
 137         controls_table.set_row_spacings (0);
 138         controls_table.set_col_spacings (0);
 139         controls_table.set_homogeneous (true);
 140
 141         controls_table.attach (name_hbox, 0, 5, 0, 1,  Gtk::FILL|Gtk::EXPAND,  Gtk::FILL|Gtk::EXPAND, 3, 0);
 142         controls_table.show_all ();
 143         controls_table.set_no_show_all ();
 144
 145         resizer.set_size_request (10, 6);
 146         resizer.set_name ("ResizeHandle");
 147         resizer.signal_expose_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_expose));
 148         resizer.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_press));
 149         resizer.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_release));
 150         resizer.signal_motion_notify_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_motion));
 151
 152         resizer.set_events (Gdk::BUTTON_PRESS_MASK|
 153                         Gdk::BUTTON_RELEASE_MASK|
 154                         Gdk::POINTER_MOTION_MASK|
 155                         Gdk::SCROLL_MASK);
 156
 157         resizer_box.pack_start (resizer, false, false);
 158         resizer.show ();
 159         resizer_box.show();
 160
 161         HSeparator* separator = manage (new HSeparator());
 162
 163         controls_vbox.pack_start (controls_table, false, false);
 164         controls_vbox.pack_end (resizer_box, false, false);
 165         controls_vbox.show ();
 166
 167         //controls_ebox.set_name ("TimeAxisViewControlsBaseUnselected");
 168         controls_ebox.add (controls_vbox);
 169         controls_ebox.add_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK|SCROLL_MASK);
 170         controls_ebox.set_flags (CAN_FOCUS);
 171
 172         controls_ebox.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_button_release));
 173         controls_ebox.signal_scroll_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_scroll), true);
 174
 175         controls_hbox.pack_start (controls_ebox, false, false);
 176         controls_hbox.show ();
 177
 178         time_axis_vbox.pack_start (controls_hbox, true, true);
 179         time_axis_vbox.pack_end (*separator, false, false);
 180         time_axis_vbox.show();
 181
 182         ColorsChanged.connect (sigc::mem_fun (*this, &TimeAxisView::color_handler));
 183
 184         GhostRegion::CatchDeletion.connect (*this, invalidator (*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         delete selection_group;
 209         selection_group = 0;
 210
 211         delete _canvas_background;
 212         _canvas_background = 0;
 213
 214         delete _canvas_display;
 215         _canvas_display = 0;
 216
 217         delete display_menu;
 218         display_menu = 0;
 219 }
 220
 221 /** Display this TimeAxisView as the nth component of the parent box, at y.
 222 *
 223 * @param y y position.
 224 * @param nth index for this TimeAxisView, increased if this view has children.
 225 * @param parent parent component.
 226 * @return height of this TimeAxisView.
 227 */
 228 guint32
 229 TimeAxisView::show_at (double y, int& nth, VBox *parent)
 230 {
 231         if (control_parent) {
 232                 control_parent->reorder_child (time_axis_vbox, nth);
 233         } else {
 234                 control_parent = parent;
 235                 parent->pack_start (time_axis_vbox, false, false);
 236                 parent->reorder_child (time_axis_vbox, nth);
 237         }
 238
 239         _order = nth;
 240
 241         if (_y_position != y) {
 242                 _canvas_display->property_y () = y;
 243                 _canvas_background->property_y () = y;
 244                 /* silly canvas */
 245                 _canvas_display->move (0.0, 0.0);
 246                 _canvas_background->move (0.0, 0.0);
 247                 _y_position = y;
 248
 249         }
 250
 251         _canvas_background->raise_to_top ();
 252         _canvas_display->raise_to_top ();
 253
 254         if (_marked_for_display) {
 255                 time_axis_vbox.show ();
 256                 controls_ebox.show ();
 257                 _canvas_background->show ();
 258         }
 259
 260         _hidden = false;
 261
 262         _effective_height = current_height ();
 263
 264         /* now show children */
 265
 266         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 267                 if (canvas_item_visible ((*i)->_canvas_display)) {
 268                         ++nth;
 269                         _effective_height += (*i)->show_at (y + _effective_height, nth, parent);
 270                 }
 271         }
 272
 273         return _effective_height;
 274 }
 275
 276 void
 277 TimeAxisView::clip_to_viewport ()
 278 {
 279         if (_marked_for_display) {
 280                 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()) {
 281                         _canvas_background->hide ();
 282                         _canvas_display->hide ();
 283                         return;
 284                 }
 285                 _canvas_background->show ();
 286                 _canvas_display->show ();
 287         }
 288         return;
 289 }
 290
 291 bool
 292 TimeAxisView::controls_ebox_scroll (GdkEventScroll* ev)
 293 {
 294         if (Keyboard::some_magic_widget_has_focus()) {
 295                 return false;
 296         }
 297
 298         switch (ev->direction) {
 299         case GDK_SCROLL_UP:
 300                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 301                         step_height (true);
 302                         return true;
 303                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 304                         _editor.scroll_tracks_up_line();
 305                         return true;
 306                 }
 307                 break;
 308
 309         case GDK_SCROLL_DOWN:
 310                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 311                         step_height (false);
 312                         return true;
 313                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 314                         _editor.scroll_tracks_down_line();
 315                         return true;
 316                 }
 317                 break;
 318
 319         default:
 320                 /* no handling for left/right, yet */
 321                 break;
 322         }
 323
 324         return false;
 325 }
 326
 327 bool
 328 TimeAxisView::controls_ebox_button_release (GdkEventButton* ev)
 329 {
 330         switch (ev->button) {
 331         case 1:
 332                 selection_click (ev);
 333                 break;
 334
 335         case 3:
 336                 popup_display_menu (ev->time);
 337                 break;
 338         }
 339
 340         return true;
 341 }
 342
 343 void
 344 TimeAxisView::selection_click (GdkEventButton* ev)
 345 {
 346         Selection::Operation op = ArdourKeyboard::selection_type (ev->state);
 347         _editor.set_selected_track (*this, op, false);
 348 }
 349
 350 void
 351 TimeAxisView::hide ()
 352 {
 353         if (_hidden) {
 354                 return;
 355         }
 356
 357         _canvas_display->hide ();
 358         _canvas_background->hide ();
 359
 360         if (control_parent) {
 361                 control_parent->remove (time_axis_vbox);
 362                 control_parent = 0;
 363         }
 364
 365         _y_position = -1;
 366         _hidden = true;
 367
 368         /* now hide children */
 369
 370         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 371                 (*i)->hide ();
 372         }
 373
 374         /* if its hidden, it cannot be selected */
 375
 376         _editor.get_selection().remove (this);
 377
 378         Hiding ();
 379 }
 380
 381 void
 382 TimeAxisView::step_height (bool bigger)
 383 {
 384         static const uint32_t step = 25;
 385
 386         if (bigger) {
 387                 if (height == preset_height(HeightSmall)) {
 388                         set_height (preset_height(HeightSmaller));
 389                 }
 390                 else if (height == preset_height(HeightSmaller)) {
 391                         set_height (preset_height(HeightNormal));
 392                 }
 393                 else {
 394                         set_height (height + step);
 395                 }
 396
 397         } else {
 398                 if ( height == preset_height(HeightSmall)){
 399                         return;
 400                 }
 401
 402                 if (height <= preset_height (HeightSmaller) && height > preset_height (HeightSmall)) {
 403                         set_height (preset_height(HeightSmall));
 404                 }
 405                 else if ( height <= preset_height (HeightNormal) && height > preset_height (HeightSmaller)){
 406                         set_height (preset_height(HeightSmaller));
 407                 }
 408                 else {
 409                         set_height (height - step);
 410                 }
 411         }
 412 }
 413
 414 void
 415 TimeAxisView::set_heights (uint32_t h)
 416 {
 417         TrackSelection& ts (_editor.get_selection().tracks);
 418
 419         for (TrackSelection::iterator i = ts.begin(); i != ts.end(); ++i) {
 420                 (*i)->set_height (h);
 421         }
 422 }
 423
 424 void
 425 TimeAxisView::set_height (Height h)
 426 {
 427         set_height (preset_height (h));
 428 }
 429
 430 void
 431 TimeAxisView::set_height (uint32_t h)
 432 {
 433         if (h < preset_height (HeightSmall)) {
 434                 h = preset_height (HeightSmall);
 435         }
 436
 437         time_axis_vbox.property_height_request () = h;
 438         height = h;
 439
 440         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 441                 (*i)->set_height ();
 442         }
 443
 444         if (canvas_item_visible (selection_group)) {
 445                 /* resize the selection rect */
 446                 show_selection (_editor.get_selection().time);
 447         }
 448 }
 449
 450 bool
 451 TimeAxisView::name_entry_key_release (GdkEventKey* ev)
 452 {
 453         TrackViewList::iterator i;
 454
 455         switch (ev->keyval) {
 456         case GDK_Escape:
 457                 name_entry.select_region (0,0);
 458                 controls_ebox.grab_focus ();
 459                 name_entry_changed ();
 460                 return true;
 461
 462         /* Shift+Tab Keys Pressed. Note that for Shift+Tab, GDK actually
 463          * generates a different ev->keyval, rather than setting
 464          * ev->state.
 465          */
 466         case GDK_ISO_Left_Tab:
 467         case GDK_Tab:
 468         {
 469                 name_entry_changed ();
 470                 TrackViewList const & allviews = _editor.get_track_views ();
 471                 TrackViewList::const_iterator i = find (allviews.begin(), allviews.end(), this);
 472                 if (ev->keyval == GDK_Tab) {
 473                         if (i != allviews.end()) {
 474                                 do {
 475                                         if (++i == allviews.end()) {
 476                                                 return true;
 477                                         }
 478                                 } while((*i)->hidden());
 479                         }
 480                 } else {
 481                         if (i != allviews.begin()) {
 482                                 do {
 483                                         if (i == allviews.begin()) {
 484                                                 return true;
 485                                         }
 486                                         --i;
 487                                 } while ((*i)->hidden());
 488                         }
 489                 }
 490
 491
 492                 /* resize to show editable name display */
 493
 494                 if ((*i)->current_height() <= preset_height (HeightSmaller)) {
 495                         (*i)->set_height (HeightSmaller);
 496                 }
 497
 498                 (*i)->name_entry.grab_focus();
 499         }
 500         return true;
 501
 502         case GDK_Up:
 503         case GDK_Down:
 504                 name_entry_changed ();
 505                 return true;
 506
 507         default:
 508                 break;
 509         }
 510
 511 #ifdef TIMEOUT_NAME_EDIT
 512         /* adapt the timeout to reflect the user's typing speed */
 513
 514         guint32 name_entry_timeout;
 515
 516         if (last_name_entry_key_press_event) {
 517                 /* timeout is 1/2 second or 5 times their current inter-char typing speed */
 518                 name_entry_timeout = std::max (500U, (5 * (ev->time - last_name_entry_key_press_event)));
 519         } else {
 520                 /* start with a 1 second timeout */
 521                 name_entry_timeout = 1000;
 522         }
 523
 524         last_name_entry_key_press_event = ev->time;
 525
 526         /* wait 1 seconds and if no more keys are pressed, act as if they pressed enter */
 527
 528         name_entry_key_timeout.disconnect();
 529         name_entry_key_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_timed_out), name_entry_timeout);
 530 #endif
 531
 532         return false;
 533 }
 534
 535 bool
 536 TimeAxisView::name_entry_focus_in (GdkEventFocus*)
 537 {
 538         name_entry.select_region (0, -1);
 539         name_entry.set_name ("EditorActiveTrackNameDisplay");
 540         return false;
 541 }
 542
 543 bool
 544 TimeAxisView::name_entry_focus_out (GdkEventFocus*)
 545 {
 546         /* clean up */
 547
 548         last_name_entry_key_press_event = 0;
 549         name_entry_key_timeout.disconnect ();
 550         name_entry.set_name ("EditorTrackNameDisplay");
 551         name_entry.select_region (0,0);
 552
 553         /* do the real stuff */
 554
 555         name_entry_changed ();
 556
 557         return false;
 558 }
 559
 560 bool
 561 TimeAxisView::name_entry_key_timed_out ()
 562 {
 563         name_entry_activated();
 564         return false;
 565 }
 566
 567 void
 568 TimeAxisView::name_entry_activated ()
 569 {
 570         controls_ebox.grab_focus();
 571 }
 572
 573 void
 574 TimeAxisView::name_entry_changed ()
 575 {
 576 }
 577
 578 bool
 579 TimeAxisView::name_entry_button_press (GdkEventButton *ev)
 580 {
 581         if (ev->button == 3) {
 582                 return true;
 583         }
 584         return false;
 585 }
 586
 587 bool
 588 TimeAxisView::name_entry_button_release (GdkEventButton *ev)
 589 {
 590         if (ev->button == 3) {
 591                 popup_display_menu (ev->time);
 592                 return true;
 593         }
 594         return false;
 595 }
 596
 597 void
 598 TimeAxisView::conditionally_add_to_selection ()
 599 {
 600         Selection& s (_editor.get_selection ());
 601
 602         if (!s.selected (this)) {
 603                 _editor.set_selected_track (*this, Selection::Set);
 604         }
 605 }
 606
 607 void
 608 TimeAxisView::popup_display_menu (guint32 when)
 609 {
 610         if (display_menu == 0) {
 611                 build_display_menu ();
 612         }
 613
 614         conditionally_add_to_selection ();
 615         display_menu->popup (1, when);
 616 }
 617
 618 void
 619 TimeAxisView::set_selected (bool yn)
 620 {
 621         if (yn == _selected) {
 622                 return;
 623         }
 624
 625         Selectable::set_selected (yn);
 626
 627         if (_selected) {
 628                 controls_ebox.set_name (controls_base_selected_name);
 629                 time_axis_vbox.set_name (controls_base_selected_name);
 630                 controls_vbox.set_name (controls_base_selected_name);
 631         } else {
 632                 controls_ebox.set_name (controls_base_unselected_name);
 633                 time_axis_vbox.set_name (controls_base_unselected_name);
 634                 controls_vbox.set_name (controls_base_unselected_name);
 635                 hide_selection ();
 636
 637                 /* children will be set for the yn=true case. but when deselecting
 638                    the editor only has a list of top-level trackviews, so we
 639                    have to do this here.
 640                 */
 641
 642                 for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 643                         (*i)->set_selected (false);
 644                 }
 645         }
 646
 647         resizer.queue_draw ();
 648 }
 649
 650 void
 651 TimeAxisView::build_display_menu ()
 652 {
 653         using namespace Menu_Helpers;
 654
 655         delete display_menu;
 656
 657         display_menu = new Menu;
 658         display_menu->set_name ("ArdourContextMenu");
 659
 660         // Just let implementing classes define what goes into the manu
 661 }
 662
 663 void
 664 TimeAxisView::set_samples_per_unit (double spu)
 665 {
 666         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 667                 (*i)->set_samples_per_unit (spu);
 668         }
 669
 670         AnalysisFeatureList::const_iterator i;
 671         list<ArdourCanvas::SimpleLine*>::iterator l;
 672 }
 673
 674 void
 675 TimeAxisView::show_timestretch (framepos_t start, framepos_t end)
 676 {
 677         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 678                 (*i)->show_timestretch (start, end);
 679         }
 680 }
 681
 682 void
 683 TimeAxisView::hide_timestretch ()
 684 {
 685         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 686                 (*i)->hide_timestretch ();
 687         }
 688 }
 689
 690 void
 691 TimeAxisView::show_selection (TimeSelection& ts)
 692 {
 693         double x1;
 694         double x2;
 695         double y2;
 696         SelectionRect *rect;
 697
 698         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 699                 (*i)->show_selection (ts);
 700         }
 701
 702         if (canvas_item_visible (selection_group)) {
 703                 while (!used_selection_rects.empty()) {
 704                         free_selection_rects.push_front (used_selection_rects.front());
 705                         used_selection_rects.pop_front();
 706                         free_selection_rects.front()->rect->hide();
 707                         free_selection_rects.front()->start_trim->hide();
 708                         free_selection_rects.front()->end_trim->hide();
 709                 }
 710                 selection_group->hide();
 711         }
 712
 713         selection_group->show();
 714         selection_group->raise_to_top();
 715
 716         for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
 717                 framepos_t start, end;
 718                 framecnt_t cnt;
 719
 720                 start = (*i).start;
 721                 end = (*i).end;
 722                 cnt = end - start + 1;
 723
 724                 rect = get_selection_rect ((*i).id);
 725
 726                 x1 = _editor.frame_to_unit (start);
 727                 x2 = _editor.frame_to_unit (start + cnt - 1);
 728                 y2 = current_height();
 729
 730                 rect->rect->property_x1() = x1;
 731                 rect->rect->property_y1() = 1.0;
 732                 rect->rect->property_x2() = x2;
 733                 rect->rect->property_y2() = y2;
 734
 735                 // trim boxes are at the top for selections
 736
 737                 if (x2 > x1) {
 738                         rect->start_trim->property_x1() = x1;
 739                         rect->start_trim->property_y1() = 1.0;
 740                         rect->start_trim->property_x2() = x1 + trim_handle_size;
 741                         rect->start_trim->property_y2() = y2;
 742
 743                         rect->end_trim->property_x1() = x2 - trim_handle_size;
 744                         rect->end_trim->property_y1() = 1.0;
 745                         rect->end_trim->property_x2() = x2;
 746                         rect->end_trim->property_y2() = y2;
 747
 748                         rect->start_trim->show();
 749                         rect->end_trim->show();
 750                 } else {
 751                         rect->start_trim->hide();
 752                         rect->end_trim->hide();
 753                 }
 754
 755                 rect->rect->show ();
 756                 used_selection_rects.push_back (rect);
 757         }
 758 }
 759
 760 void
 761 TimeAxisView::reshow_selection (TimeSelection& ts)
 762 {
 763         show_selection (ts);
 764
 765         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 766                 (*i)->show_selection (ts);
 767         }
 768 }
 769
 770 void
 771 TimeAxisView::hide_selection ()
 772 {
 773         if (canvas_item_visible (selection_group)) {
 774                 while (!used_selection_rects.empty()) {
 775                         free_selection_rects.push_front (used_selection_rects.front());
 776                         used_selection_rects.pop_front();
 777                         free_selection_rects.front()->rect->hide();
 778                         free_selection_rects.front()->start_trim->hide();
 779                         free_selection_rects.front()->end_trim->hide();
 780                 }
 781                 selection_group->hide();
 782         }
 783
 784         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 785                 (*i)->hide_selection ();
 786         }
 787 }
 788
 789 void
 790 TimeAxisView::order_selection_trims (ArdourCanvas::Item *item, bool put_start_on_top)
 791 {
 792         /* find the selection rect this is for. we have the item corresponding to one
 793            of the trim handles.
 794          */
 795
 796         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 797                 if ((*i)->start_trim == item || (*i)->end_trim == item) {
 798
 799                         /* make one trim handle be "above" the other so that if they overlap,
 800                            the top one is the one last used.
 801                         */
 802
 803                         (*i)->rect->raise_to_top ();
 804                         (put_start_on_top ? (*i)->start_trim : (*i)->end_trim)->raise_to_top ();
 805                         (put_start_on_top ? (*i)->end_trim : (*i)->start_trim)->raise_to_top ();
 806
 807                         break;
 808                 }
 809         }
 810 }
 811
 812 SelectionRect *
 813 TimeAxisView::get_selection_rect (uint32_t id)
 814 {
 815         SelectionRect *rect;
 816
 817         /* check to see if we already have a visible rect for this particular selection ID */
 818
 819         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 820                 if ((*i)->id == id) {
 821                         return (*i);
 822                 }
 823         }
 824
 825         /* ditto for the free rect list */
 826
 827         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 828                 if ((*i)->id == id) {
 829                         SelectionRect* ret = (*i);
 830                         free_selection_rects.erase (i);
 831                         return ret;
 832                 }
 833         }
 834
 835         /* no existing matching rect, so go get a new one from the free list, or create one if there are none */
 836
 837         if (free_selection_rects.empty()) {
 838
 839                 rect = new SelectionRect;
 840
 841                 rect->rect = new SimpleRect (*selection_group);
 842                 rect->rect->property_outline_what() = 0x0;
 843                 rect->rect->property_x1() = 0.0;
 844                 rect->rect->property_y1() = 0.0;
 845                 rect->rect->property_x2() = 0.0;
 846                 rect->rect->property_y2() = 0.0;
 847                 rect->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
 848
 849                 rect->start_trim = new SimpleRect (*selection_group);
 850                 rect->start_trim->property_outline_what() = 0x0;
 851                 rect->start_trim->property_x1() = 0.0;
 852                 rect->start_trim->property_x2() = 0.0;
 853
 854                 rect->end_trim = new SimpleRect (*selection_group);
 855                 rect->end_trim->property_outline_what() = 0x0;
 856                 rect->end_trim->property_x1() = 0.0;
 857                 rect->end_trim->property_x2() = 0.0;
 858
 859                 free_selection_rects.push_front (rect);
 860
 861                 rect->rect->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_rect_event), rect->rect, rect));
 862                 rect->start_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_start_trim_event), rect->rect, rect));
 863                 rect->end_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_end_trim_event), rect->rect, rect));
 864         }
 865
 866         rect = free_selection_rects.front();
 867         rect->id = id;
 868         free_selection_rects.pop_front();
 869         return rect;
 870 }
 871
 872 struct null_deleter { void operator()(void const *) const {} };
 873
 874 bool
 875 TimeAxisView::is_child (TimeAxisView* tav)
 876 {
 877         return find (children.begin(), children.end(), boost::shared_ptr<TimeAxisView>(tav, null_deleter())) != children.end();
 878 }
 879
 880 void
 881 TimeAxisView::add_child (boost::shared_ptr<TimeAxisView> child)
 882 {
 883         children.push_back (child);
 884 }
 885
 886 void
 887 TimeAxisView::remove_child (boost::shared_ptr<TimeAxisView> child)
 888 {
 889         Children::iterator i;
 890
 891         if ((i = find (children.begin(), children.end(), child)) != children.end()) {
 892                 children.erase (i);
 893         }
 894 }
 895
 896 /** Get selectable things within a given range.
 897  *  @param start Start time in session frames.
 898  *  @param end End time in session frames.
 899  *  @param top Top y range, in trackview coordinates (ie 0 is the top of the track view)
 900  *  @param bot Bottom y range, in trackview coordinates (ie 0 is the top of the track view)
 901  *  @param result Filled in with selectable things.
 902  */
 903 void
 904 TimeAxisView::get_selectables (framepos_t /*start*/, framepos_t /*end*/, double /*top*/, double /*bot*/, list<Selectable*>& /*result*/)
 905 {
 906         return;
 907 }
 908
 909 void
 910 TimeAxisView::get_inverted_selectables (Selection& /*sel*/, list<Selectable*>& /*result*/)
 911 {
 912         return;
 913 }
 914
 915 void
 916 TimeAxisView::add_ghost (RegionView* rv)
 917 {
 918         GhostRegion* gr = rv->add_ghost (*this);
 919
 920         if(gr) {
 921                 ghosts.push_back(gr);
 922         }
 923 }
 924
 925 void
 926 TimeAxisView::remove_ghost (RegionView* rv)
 927 {
 928         rv->remove_ghost_in (*this);
 929 }
 930
 931 void
 932 TimeAxisView::erase_ghost (GhostRegion* gr)
 933 {
 934         if (in_destructor) {
 935                 return;
 936         }
 937
 938         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 939                 if ((*i) == gr) {
 940                         ghosts.erase (i);
 941                         break;
 942                 }
 943         }
 944 }
 945
 946 bool
 947 TimeAxisView::touched (double top, double bot)
 948 {
 949         /* remember: this is X Window - coordinate space starts in upper left and moves down.
 950           y_position is the "origin" or "top" of the track.
 951         */
 952
 953         double mybot = _y_position + current_height();
 954
 955         return ((_y_position <= bot && _y_position >= top) ||
 956                 ((mybot <= bot) && (top < mybot)) ||
 957                 (mybot >= bot && _y_position < top));
 958 }
 959
 960 void
 961 TimeAxisView::set_parent (TimeAxisView& p)
 962 {
 963         parent = &p;
 964 }
 965
 966 bool
 967 TimeAxisView::has_state () const
 968 {
 969         return _has_state;
 970 }
 971
 972 TimeAxisView*
 973 TimeAxisView::get_parent_with_state ()
 974 {
 975         if (parent == 0) {
 976                 return 0;
 977         }
 978
 979         if (parent->has_state()) {
 980                 return parent;
 981         }
 982
 983         return parent->get_parent_with_state ();
 984 }
 985
 986
 987 XMLNode&
 988 TimeAxisView::get_state ()
 989 {
 990         /* XXX: is this method used? */
 991
 992         XMLNode* node = new XMLNode ("TAV-" + name());
 993         char buf[32];
 994
 995         snprintf (buf, sizeof(buf), "%u", height);
 996         node->add_property ("height", buf);
 997         node->add_property ("marked-for-display", (_marked_for_display ? "1" : "0"));
 998         return *node;
 999 }
1000
1001 int
1002 TimeAxisView::set_state (const XMLNode& node, int /*version*/)
1003 {
1004         const XMLProperty *prop;
1005
1006         /* XXX: I think this might be vestigial */
1007         if ((prop = node.property ("marked-for-display")) != 0) {
1008                 _marked_for_display = (prop->value() == "1");
1009         }
1010
1011         if ((prop = node.property ("shown-editor")) != 0) {
1012                 _marked_for_display = string_is_affirmative (prop->value ());
1013         }
1014
1015         if ((prop = node.property ("track-height")) != 0) {
1016
1017                 if (prop->value() == "largest") {
1018                         set_height (HeightLargest);
1019                 } else if (prop->value() == "large") {
1020                         set_height (HeightLarge);
1021                 } else if (prop->value() == "larger") {
1022                         set_height (HeightLarger);
1023                 } else if (prop->value() == "normal") {
1024                         set_height (HeightNormal);
1025                 } else if (prop->value() == "smaller") {
1026                         set_height (HeightSmaller);
1027                 } else if (prop->value() == "small") {
1028                         set_height (HeightSmall);
1029                 } else {
1030                         error << string_compose(_("unknown track height name \"%1\" in XML GUI information"), prop->value()) << endmsg;
1031                         set_height (HeightNormal);
1032                 }
1033
1034         } else if ((prop = node.property ("height")) != 0) {
1035
1036                 set_height (atoi (prop->value()));
1037
1038         } else {
1039
1040                 set_height (HeightNormal);
1041         }
1042
1043         return 0;
1044 }
1045
1046 void
1047 TimeAxisView::reset_height()
1048 {
1049         set_height (height);
1050
1051         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
1052                 (*i)->set_height ((*i)->height);
1053         }
1054 }
1055
1056 void
1057 TimeAxisView::compute_heights ()
1058 {
1059         Gtk::Window window (Gtk::WINDOW_TOPLEVEL);
1060         Gtk::Table two_row_table (2, 8);
1061         Gtk::Table one_row_table (1, 8);
1062         Button* buttons[5];
1063         const int border_width = 2;
1064         extra_height = (2 * border_width)
1065                 //+ 2   // 2 pixels for the hseparator between TimeAxisView control areas
1066                 + 6; // resizer button (3 x 2 pixel elements + 2 x 2 pixel gaps)
1067
1068         window.add (one_row_table);
1069
1070         one_row_table.set_border_width (border_width);
1071         one_row_table.set_row_spacings (0);
1072         one_row_table.set_col_spacings (0);
1073         one_row_table.set_homogeneous (true);
1074
1075         two_row_table.set_border_width (border_width);
1076         two_row_table.set_row_spacings (0);
1077         two_row_table.set_col_spacings (0);
1078         two_row_table.set_homogeneous (true);
1079
1080         for (int i = 0; i < 5; ++i) {
1081                 buttons[i] = manage (new Button (X_("f")));
1082                 buttons[i]->set_name ("TrackMuteButton");
1083         }
1084
1085         one_row_table.attach (*buttons[0], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1086
1087         one_row_table.show_all ();
1088         Gtk::Requisition req(one_row_table.size_request ());
1089
1090         // height required to show 1 row of buttons
1091
1092         smaller_height = req.height + extra_height;
1093 }
1094
1095 void
1096 TimeAxisView::show_name_label ()
1097 {
1098         if (!(name_packing & NameLabelPacked)) {
1099                 name_hbox.pack_start (name_label, true, true);
1100                 name_packing = NamePackingBits (name_packing | NameLabelPacked);
1101                 name_hbox.show ();
1102                 name_label.show ();
1103         }
1104 }
1105
1106 void
1107 TimeAxisView::show_name_entry ()
1108 {
1109         if (!(name_packing & NameEntryPacked)) {
1110                 name_hbox.pack_start (name_entry, true, true);
1111                 name_packing = NamePackingBits (name_packing | NameEntryPacked);
1112                 name_hbox.show ();
1113                 name_entry.show ();
1114         }
1115 }
1116
1117 void
1118 TimeAxisView::hide_name_label ()
1119 {
1120         if (name_packing & NameLabelPacked) {
1121                 name_hbox.remove (name_label);
1122                 name_packing = NamePackingBits (name_packing & ~NameLabelPacked);
1123         }
1124 }
1125
1126 void
1127 TimeAxisView::hide_name_entry ()
1128 {
1129         if (name_packing & NameEntryPacked) {
1130                 name_hbox.remove (name_entry);
1131                 name_packing = NamePackingBits (name_packing & ~NameEntryPacked);
1132         }
1133 }
1134
1135 void
1136 TimeAxisView::color_handler ()
1137 {
1138         for (list<GhostRegion*>::iterator i=ghosts.begin(); i != ghosts.end(); i++ ) {
1139                 (*i)->set_colors();
1140         }
1141
1142         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
1143
1144                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1145                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1146
1147                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1148                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1149
1150                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1151                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1152         }
1153
1154         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
1155
1156                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1157                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1158
1159                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1160                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1161
1162                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1163                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1164         }
1165 }
1166
1167 /** @return Pair: TimeAxisView, layer index.
1168  * TimeAxisView is non-0 if this object covers y, or one of its children does.
1169  * If the covering object is a child axis, then the child is returned.
1170  * TimeAxisView is 0 otherwise.
1171  * Layer index is the layer number if the TimeAxisView is valid and is in stacked
1172  * region display mode, otherwise 0.
1173  */
1174 std::pair<TimeAxisView*, layer_t>
1175 TimeAxisView::covers_y_position (double y)
1176 {
1177         if (hidden()) {
1178                 return std::make_pair ( (TimeAxisView *) 0, 0);
1179         }
1180
1181         if (_y_position <= y && y < (_y_position + height)) {
1182
1183                 /* work out the layer index if appropriate */
1184                 layer_t l = 0;
1185                 if (layer_display () == Stacked && view ()) {
1186                         /* compute layer */
1187                         l = layer_t ((_y_position + height - y) / (view()->child_height ()));
1188                         /* clamp to max layers to be on the safe side; sometimes the above calculation
1189                           returns a too-high value */
1190                         if (l >= view()->layers ()) {
1191                                 l = view()->layers() - 1;
1192                         }
1193                 }
1194
1195                 return std::make_pair (this, l);
1196         }
1197
1198         for (Children::const_iterator i = children.begin(); i != children.end(); ++i) {
1199
1200                 std::pair<TimeAxisView*, int> const r = (*i)->covers_y_position (y);
1201                 if (r.first) {
1202                         return r;
1203                 }
1204         }
1205
1206         return std::make_pair ( (TimeAxisView *) 0, 0);
1207 }
1208
1209 bool
1210 TimeAxisView::resizer_button_press (GdkEventButton* event)
1211 {
1212         _resize_drag_start = event->y_root;
1213         return true;
1214 }
1215
1216 bool
1217 TimeAxisView::resizer_button_release (GdkEventButton*)
1218 {
1219         _editor.stop_canvas_autoscroll ();
1220         _resize_drag_start = -1;
1221         return true;
1222 }
1223
1224 void
1225 TimeAxisView::idle_resize (uint32_t h)
1226 {
1227         set_height (h);
1228 }
1229
1230 bool
1231 TimeAxisView::resizer_motion (GdkEventMotion* ev)
1232 {
1233         if (_resize_drag_start >= 0) {
1234                 /* (ab)use the DragManager to do autoscrolling; adjust the event coordinates
1235                    into the world coordinate space that DragManager::motion_handler is expecting,
1236                    and then fake a DragManager motion event so that when maybe_autoscroll
1237                    asks DragManager for the current pointer position it will get the correct
1238                    answers.
1239                 */
1240                 int tx, ty;
1241                 resizer.translate_coordinates (*control_parent, ev->x, ev->y, tx, ty);
1242                 ev->y = ty - _editor.get_trackview_group_vertical_offset();
1243                 _editor.drags()->motion_handler ((GdkEvent *) ev, false);
1244                 _editor.maybe_autoscroll (false, true);
1245
1246                 /* now do the actual TAV resize */
1247                 int32_t const delta = (int32_t) floor (ev->y_root - _resize_drag_start);
1248                 _editor.add_to_idle_resize (this, delta);
1249                 _resize_drag_start = ev->y_root;
1250         }
1251
1252         return true;
1253 }
1254
1255 bool
1256 TimeAxisView::resizer_expose (GdkEventExpose* event)
1257 {
1258         int w, h, x, y, d;
1259         Glib::RefPtr<Gdk::Window> win (resizer.get_window());
1260         Glib::RefPtr<Gdk::GC> dark (resizer.get_style()->get_fg_gc (STATE_NORMAL));
1261         Glib::RefPtr<Gdk::GC> light (resizer.get_style()->get_bg_gc (STATE_NORMAL));
1262
1263         win->draw_rectangle (controls_ebox.get_style()->get_bg_gc(STATE_NORMAL),
1264                         true,
1265                         event->area.x,
1266                         event->area.y,
1267                         event->area.width,
1268                         event->area.height);
1269
1270         win->get_geometry (x, y, w, h, d);
1271
1272         /* handle/line #1 */
1273
1274         win->draw_line (dark, 0, 0, w - 2, 0);
1275         win->draw_point (dark, 0, 1);
1276         win->draw_line (light, 1, 1, w - 1, 1);
1277         win->draw_point (light, w - 1, 0);
1278
1279         /* handle/line #2 */
1280
1281         win->draw_line (dark, 0, 4, w - 2, 4);
1282         win->draw_point (dark, 0, 5);
1283         win->draw_line (light, 1, 5, w - 1, 5);
1284         win->draw_point (light, w - 1, 4);
1285
1286         /* use vertical resize mouse cursor */
1287         win->set_cursor(Gdk::Cursor(Gdk::SB_V_DOUBLE_ARROW));
1288
1289         return true;
1290 }
1291
1292 bool
1293 TimeAxisView::set_visibility (bool yn)
1294 {
1295         if (yn != marked_for_display()) {
1296                 if (yn) {
1297                         set_marked_for_display (true);
1298                         canvas_display()->show();
1299                 } else {
1300                         set_marked_for_display (false);
1301                         hide ();
1302                 }
1303                 return true; // things changed
1304         }
1305
1306         return false;
1307 }
1308
1309 uint32_t
1310 TimeAxisView::preset_height (Height h)
1311 {
1312         switch (h) {
1313         case HeightLargest:
1314                 return extra_height + 48 + 250;
1315         case HeightLarger:
1316                 return extra_height + 48 + 150;
1317         case HeightLarge:
1318                 return extra_height + 48 + 50;
1319         case HeightNormal:
1320                 return extra_height + 48;
1321         case HeightSmall:
1322                 return 27;
1323         case HeightSmaller:
1324                 return smaller_height;
1325         }
1326
1327         /* NOTREACHED */
1328         return 0;
1329 }
1330
1331 /** @return Child time axis views that are not hidden */
1332 TimeAxisView::Children
1333 TimeAxisView::get_child_list ()
1334 {
1335         Children c;
1336
1337         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
1338                 if (!(*i)->hidden()) {
1339                         c.push_back(*i);
1340                 }
1341         }
1342
1343         return c;
1344 }
1345
1346