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 "gui_thread.h"
  44 #include "public_editor.h"
  45 #include "time_axis_view.h"
  46 #include "region_view.h"
  47 #include "ghostregion.h"
  48 #include "simplerect.h"
  49 #include "simpleline.h"
  50 #include "selection.h"
  51 #include "keyboard.h"
  52 #include "rgb_macros.h"
  53 #include "utils.h"
  54 #include "streamview.h"
  55 #include "editor_drag.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 uint32_t TimeAxisView::extra_height;
  70 uint32_t TimeAxisView::smaller_height;
  71 int const TimeAxisView::_max_order = 512;
  72 PBD::Signal1<void,TimeAxisView*> TimeAxisView::CatchDeletion;
  73
  74 TimeAxisView::TimeAxisView (ARDOUR::Session* sess, PublicEditor& ed, TimeAxisView* rent, Canvas& /*canvas*/)
  75         : AxisView (sess),
  76           controls_table (2, 8),
  77           _y_position (0),
  78           _editor (ed),
  79           _order (0)
  80 {
  81         if (extra_height == 0) {
  82                 compute_heights ();
  83         }
  84
  85         _canvas_background = new Group (*ed.get_background_group (), 0.0, 0.0);
  86         _canvas_display = new Group (*ed.get_trackview_group (), 0.0, 0.0);
  87         _canvas_display->hide(); // reveal as needed
  88
  89         selection_group = new Group (*_canvas_display);
  90         selection_group->hide();
  91
  92         _ghost_group = new Group (*_canvas_display);
  93         _ghost_group->lower_to_bottom();
  94         _ghost_group->show();
  95
  96         control_parent = 0;
  97         display_menu = 0;
  98         _hidden = false;
  99         in_destructor = false;
 100         height = 0;
 101         _effective_height = 0;
 102         parent = rent;
 103         _has_state = false;
 104         last_name_entry_key_press_event = 0;
 105         name_packing = NamePackingBits (0);
 106         _resize_drag_start = -1;
 107
 108         /*
 109           Create the standard LHS Controls
 110           We create the top-level container and name add the name label here,
 111           subclasses can add to the layout as required
 112         */
 113
 114         name_entry.set_name ("EditorTrackNameDisplay");
 115         name_entry.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_release));
 116         name_entry.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_press));
 117         name_entry.signal_key_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_release));
 118         name_entry.signal_activate().connect (sigc::mem_fun(*this, &TimeAxisView::name_entry_activated));
 119         name_entry.signal_focus_in_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_in));
 120         name_entry.signal_focus_out_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_out));
 121         Gtkmm2ext::set_size_request_to_display_given_text (name_entry, N_("gTortnam"), 10, 10); // just represents a short name
 122
 123         name_label.set_name ("TrackLabel");
 124         name_label.set_alignment (0.0, 0.5);
 125
 126         /* typically, either name_label OR name_entry are visible,
 127            but not both. its up to derived classes to show/hide them as they
 128            wish.
 129         */
 130
 131         name_hbox.show ();
 132
 133         controls_table.set_size_request (200);
 134         controls_table.set_border_width (2);
 135         controls_table.set_row_spacings (0);
 136         controls_table.set_col_spacings (0);
 137         controls_table.set_homogeneous (true);
 138
 139         controls_table.attach (name_hbox, 0, 5, 0, 1,  Gtk::FILL|Gtk::EXPAND,  Gtk::FILL|Gtk::EXPAND, 3, 0);
 140         controls_table.show_all ();
 141         controls_table.set_no_show_all ();
 142
 143         resizer.set_size_request (10, 6);
 144         resizer.set_name ("ResizeHandle");
 145         resizer.signal_expose_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_expose));
 146         resizer.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_press));
 147         resizer.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_release));
 148         resizer.signal_motion_notify_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_motion));
 149
 150         resizer.set_events (Gdk::BUTTON_PRESS_MASK|
 151                         Gdk::BUTTON_RELEASE_MASK|
 152                         Gdk::POINTER_MOTION_MASK|
 153                         Gdk::SCROLL_MASK);
 154
 155         resizer_box.pack_start (resizer, false, false);
 156         resizer.show ();
 157         resizer_box.show();
 158
 159         HSeparator* separator = manage (new HSeparator());
 160
 161         controls_vbox.pack_start (controls_table, false, false);
 162         controls_vbox.pack_end (resizer_box, false, false);
 163         controls_vbox.show ();
 164
 165         //controls_ebox.set_name ("TimeAxisViewControlsBaseUnselected");
 166         controls_ebox.add (controls_vbox);
 167         controls_ebox.add_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK|SCROLL_MASK);
 168         controls_ebox.set_flags (CAN_FOCUS);
 169
 170         controls_ebox.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_button_release));
 171         controls_ebox.signal_scroll_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_scroll), true);
 172
 173         controls_hbox.pack_start (controls_ebox, false, false);
 174         controls_hbox.show ();
 175
 176         time_axis_vbox.pack_start (controls_hbox, true, true);
 177         time_axis_vbox.pack_end (*separator, false, false);
 178         time_axis_vbox.show();
 179
 180         ColorsChanged.connect (sigc::mem_fun (*this, &TimeAxisView::color_handler));
 181
 182         GhostRegion::CatchDeletion.connect (*this, invalidator (*this), ui_bind (&TimeAxisView::erase_ghost, this, _1), gui_context());
 183 }
 184
 185 TimeAxisView::~TimeAxisView()
 186 {
 187         in_destructor = true;
 188
 189         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 190                 delete *i;
 191         }
 192
 193         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 194                 delete (*i)->rect;
 195                 delete (*i)->start_trim;
 196                 delete (*i)->end_trim;
 197
 198         }
 199
 200         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 201                 delete (*i)->rect;
 202                 delete (*i)->start_trim;
 203                 delete (*i)->end_trim;
 204         }
 205
 206         delete selection_group;
 207         selection_group = 0;
 208
 209         delete _canvas_background;
 210         _canvas_background = 0;
 211
 212         delete _canvas_display;
 213         _canvas_display = 0;
 214
 215         delete display_menu;
 216         display_menu = 0;
 217 }
 218
 219 /** Display this TimeAxisView as the nth component of the parent box, at y.
 220 *
 221 * @param y y position.
 222 * @param nth index for this TimeAxisView, increased if this view has children.
 223 * @param parent parent component.
 224 * @return height of this TimeAxisView.
 225 */
 226 guint32
 227 TimeAxisView::show_at (double y, int& nth, VBox *parent)
 228 {
 229         if (control_parent) {
 230                 control_parent->reorder_child (time_axis_vbox, nth);
 231         } else {
 232                 control_parent = parent;
 233                 parent->pack_start (time_axis_vbox, false, false);
 234                 parent->reorder_child (time_axis_vbox, nth);
 235         }
 236
 237         _order = nth;
 238
 239         if (_y_position != y) {
 240                 _canvas_display->property_y () = y;
 241                 _canvas_background->property_y () = y;
 242                 /* silly canvas */
 243                 _canvas_display->move (0.0, 0.0);
 244                 _canvas_background->move (0.0, 0.0);
 245                 _y_position = y;
 246
 247         }
 248
 249         _canvas_background->raise_to_top ();
 250         _canvas_display->raise_to_top ();
 251
 252         if (_marked_for_display) {
 253                 time_axis_vbox.show ();
 254                 controls_ebox.show ();
 255                 _canvas_background->show ();
 256         }
 257
 258         _hidden = false;
 259
 260         _effective_height = current_height ();
 261
 262         /* now show children */
 263
 264         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 265                 if (canvas_item_visible ((*i)->_canvas_display)) {
 266                         ++nth;
 267                         _effective_height += (*i)->show_at (y + _effective_height, nth, parent);
 268                 }
 269         }
 270
 271         return _effective_height;
 272 }
 273
 274 void
 275 TimeAxisView::clip_to_viewport ()
 276 {
 277         if (_marked_for_display) {
 278                 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()) {
 279                         _canvas_background->hide ();
 280                         _canvas_display->hide ();
 281                         return;
 282                 }
 283                 _canvas_background->show ();
 284                 _canvas_display->show ();
 285         }
 286         return;
 287 }
 288
 289 bool
 290 TimeAxisView::controls_ebox_scroll (GdkEventScroll* ev)
 291 {
 292         if (Keyboard::some_magic_widget_has_focus()) {
 293                 return false;
 294         }
 295
 296         switch (ev->direction) {
 297         case GDK_SCROLL_UP:
 298                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 299                         step_height (true);
 300                         return true;
 301                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 302                         _editor.scroll_tracks_up_line();
 303                         return true;
 304                 }
 305                 break;
 306
 307         case GDK_SCROLL_DOWN:
 308                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 309                         step_height (false);
 310                         return true;
 311                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 312                         _editor.scroll_tracks_down_line();
 313                         return true;
 314                 }
 315                 break;
 316
 317         default:
 318                 /* no handling for left/right, yet */
 319                 break;
 320         }
 321
 322         return false;
 323 }
 324
 325 bool
 326 TimeAxisView::controls_ebox_button_release (GdkEventButton* ev)
 327 {
 328         switch (ev->button) {
 329         case 1:
 330                 selection_click (ev);
 331                 break;
 332
 333         case 3:
 334                 popup_display_menu (ev->time);
 335                 break;
 336         }
 337
 338         return true;
 339 }
 340
 341 void
 342 TimeAxisView::selection_click (GdkEventButton* ev)
 343 {
 344         Selection::Operation op = ArdourKeyboard::selection_type (ev->state);
 345         _editor.set_selected_track (*this, op, false);
 346 }
 347
 348 void
 349 TimeAxisView::hide ()
 350 {
 351         if (_hidden) {
 352                 return;
 353         }
 354
 355         _canvas_display->hide ();
 356         _canvas_background->hide ();
 357
 358         if (control_parent) {
 359                 control_parent->remove (time_axis_vbox);
 360                 control_parent = 0;
 361         }
 362
 363         _y_position = -1;
 364         _hidden = true;
 365
 366         /* now hide children */
 367
 368         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 369                 (*i)->hide ();
 370         }
 371
 372         /* if its hidden, it cannot be selected */
 373
 374         _editor.get_selection().remove (this);
 375
 376         Hiding ();
 377 }
 378
 379 void
 380 TimeAxisView::step_height (bool bigger)
 381 {
 382         static const uint32_t step = 25;
 383
 384         if (bigger) {
 385                 if (height == preset_height(HeightSmall)) {
 386                         set_height (preset_height(HeightSmaller));
 387                 }
 388                 else if (height == preset_height(HeightSmaller)) {
 389                         set_height (preset_height(HeightNormal));
 390                 }
 391                 else {
 392                         set_height (height + step);
 393                 }
 394
 395         } else {
 396                 if ( height == preset_height(HeightSmall)){
 397                         return;
 398                 }
 399                 if (height == preset_height (HeightSmaller)) {
 400                         set_height (preset_height(HeightSmall));
 401                 }
 402                 else if (height > step) {
 403
 404                         if ( height <= preset_height (HeightNormal) && height > preset_height (HeightSmaller)){
 405                                 set_height (preset_height(HeightSmaller));
 406                         }
 407                         else {
 408                                 set_height (height - step);
 409                         }
 410                 }
 411         }
 412 }
 413 /*
 414         switch (h) {
 415         case HeightLargest:
 416                 return extra_height + 48 + 250;
 417         case HeightLarger:
 418                 return extra_height + 48 + 150;
 419         case HeightLarge:
 420                 return extra_height + 48 + 50;
 421         case HeightNormal:
 422                 return extra_height + 48;
 423         case HeightSmall:
 424                 return 27;
 425         case HeightSmaller:
 426                 return smaller_height;
 427         }
 428 */
 429 void
 430 TimeAxisView::set_heights (uint32_t h)
 431 {
 432         TrackSelection& ts (_editor.get_selection().tracks);
 433
 434         for (TrackSelection::iterator i = ts.begin(); i != ts.end(); ++i) {
 435                 (*i)->set_height (h);
 436         }
 437 }
 438
 439 void
 440 TimeAxisView::set_height (Height h)
 441 {
 442         set_height (preset_height (h));
 443 }
 444
 445 void
 446 TimeAxisView::set_height(uint32_t h)
 447 {
 448         time_axis_vbox.property_height_request () = h;
 449         height = h;
 450
 451         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 452                 (*i)->set_height ();
 453         }
 454
 455         if (canvas_item_visible (selection_group)) {
 456                 /* resize the selection rect */
 457                 show_selection (_editor.get_selection().time);
 458         }
 459 }
 460
 461 bool
 462 TimeAxisView::name_entry_key_release (GdkEventKey* ev)
 463 {
 464         TrackViewList::iterator i;
 465
 466         switch (ev->keyval) {
 467         case GDK_Escape:
 468                 name_entry.select_region (0,0);
 469                 controls_ebox.grab_focus ();
 470                 name_entry_changed ();
 471                 return true;
 472
 473         /* Shift+Tab Keys Pressed. Note that for Shift+Tab, GDK actually
 474          * generates a different ev->keyval, rather than setting
 475          * ev->state.
 476          */
 477         case GDK_ISO_Left_Tab:
 478         case GDK_Tab:
 479         {
 480                 name_entry_changed ();
 481                 TrackViewList const & allviews = _editor.get_track_views ();
 482                 TrackViewList::const_iterator i = find (allviews.begin(), allviews.end(), this);
 483                 if (ev->keyval == GDK_Tab) {
 484                         if (i != allviews.end()) {
 485                                 do {
 486                                         if (++i == allviews.end()) {
 487                                                 return true;
 488                                         }
 489                                 } while((*i)->hidden());
 490                         }
 491                 } else {
 492                         if (i != allviews.begin()) {
 493                                 do {
 494                                         if (i == allviews.begin()) {
 495                                                 return true;
 496                                         }
 497                                         --i;
 498                                 } while ((*i)->hidden());
 499                         }
 500                 }
 501
 502
 503                 /* resize to show editable name display */
 504
 505                 if ((*i)->current_height() <= preset_height (HeightSmaller)) {
 506                         (*i)->set_height (HeightSmaller);
 507                 }
 508
 509                 (*i)->name_entry.grab_focus();
 510         }
 511         return true;
 512
 513         case GDK_Up:
 514         case GDK_Down:
 515                 name_entry_changed ();
 516                 return true;
 517
 518         default:
 519                 break;
 520         }
 521
 522 #ifdef TIMEOUT_NAME_EDIT
 523         /* adapt the timeout to reflect the user's typing speed */
 524
 525         guint32 name_entry_timeout;
 526
 527         if (last_name_entry_key_press_event) {
 528                 /* timeout is 1/2 second or 5 times their current inter-char typing speed */
 529                 name_entry_timeout = std::max (500U, (5 * (ev->time - last_name_entry_key_press_event)));
 530         } else {
 531                 /* start with a 1 second timeout */
 532                 name_entry_timeout = 1000;
 533         }
 534
 535         last_name_entry_key_press_event = ev->time;
 536
 537         /* wait 1 seconds and if no more keys are pressed, act as if they pressed enter */
 538
 539         name_entry_key_timeout.disconnect();
 540         name_entry_key_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_timed_out), name_entry_timeout);
 541 #endif
 542
 543         return false;
 544 }
 545
 546 bool
 547 TimeAxisView::name_entry_focus_in (GdkEventFocus*)
 548 {
 549         name_entry.select_region (0, -1);
 550         name_entry.set_name ("EditorActiveTrackNameDisplay");
 551         return false;
 552 }
 553
 554 bool
 555 TimeAxisView::name_entry_focus_out (GdkEventFocus*)
 556 {
 557         /* clean up */
 558
 559         last_name_entry_key_press_event = 0;
 560         name_entry_key_timeout.disconnect ();
 561         name_entry.set_name ("EditorTrackNameDisplay");
 562         name_entry.select_region (0,0);
 563
 564         /* do the real stuff */
 565
 566         name_entry_changed ();
 567
 568         return false;
 569 }
 570
 571 bool
 572 TimeAxisView::name_entry_key_timed_out ()
 573 {
 574         name_entry_activated();
 575         return false;
 576 }
 577
 578 void
 579 TimeAxisView::name_entry_activated ()
 580 {
 581         controls_ebox.grab_focus();
 582 }
 583
 584 void
 585 TimeAxisView::name_entry_changed ()
 586 {
 587 }
 588
 589 bool
 590 TimeAxisView::name_entry_button_press (GdkEventButton *ev)
 591 {
 592         if (ev->button == 3) {
 593                 return true;
 594         }
 595         return false;
 596 }
 597
 598 bool
 599 TimeAxisView::name_entry_button_release (GdkEventButton *ev)
 600 {
 601         if (ev->button == 3) {
 602                 popup_display_menu (ev->time);
 603                 return true;
 604         }
 605         return false;
 606 }
 607
 608 void
 609 TimeAxisView::conditionally_add_to_selection ()
 610 {
 611         Selection& s (_editor.get_selection ());
 612
 613         if (!s.selected (this)) {
 614                 _editor.set_selected_track (*this, Selection::Set);
 615         }
 616 }
 617
 618 void
 619 TimeAxisView::popup_display_menu (guint32 when)
 620 {
 621         if (display_menu == 0) {
 622                 build_display_menu ();
 623         }
 624
 625         conditionally_add_to_selection ();
 626         display_menu->popup (1, when);
 627 }
 628
 629 void
 630 TimeAxisView::set_selected (bool yn)
 631 {
 632         if (yn == _selected) {
 633                 return;
 634         }
 635
 636         Selectable::set_selected (yn);
 637
 638         if (_selected) {
 639                 controls_ebox.set_name (controls_base_selected_name);
 640                 time_axis_vbox.set_name (controls_base_selected_name);
 641                 controls_vbox.set_name (controls_base_selected_name);
 642         } else {
 643                 controls_ebox.set_name (controls_base_unselected_name);
 644                 time_axis_vbox.set_name (controls_base_unselected_name);
 645                 controls_vbox.set_name (controls_base_unselected_name);
 646                 hide_selection ();
 647
 648                 /* children will be set for the yn=true case. but when deselecting
 649                    the editor only has a list of top-level trackviews, so we
 650                    have to do this here.
 651                 */
 652
 653                 for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 654                         (*i)->set_selected (false);
 655                 }
 656         }
 657
 658         resizer.queue_draw ();
 659 }
 660
 661 void
 662 TimeAxisView::build_display_menu ()
 663 {
 664         using namespace Menu_Helpers;
 665
 666         delete display_menu;
 667
 668         display_menu = new Menu;
 669         display_menu->set_name ("ArdourContextMenu");
 670
 671         // Just let implementing classes define what goes into the manu
 672 }
 673
 674 void
 675 TimeAxisView::set_samples_per_unit (double spu)
 676 {
 677         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 678                 (*i)->set_samples_per_unit (spu);
 679         }
 680
 681         AnalysisFeatureList::const_iterator i;
 682         list<ArdourCanvas::SimpleLine*>::iterator l;
 683 }
 684
 685 void
 686 TimeAxisView::show_timestretch (nframes_t start, nframes_t end)
 687 {
 688         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 689                 (*i)->show_timestretch (start, end);
 690         }
 691 }
 692
 693 void
 694 TimeAxisView::hide_timestretch ()
 695 {
 696         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 697                 (*i)->hide_timestretch ();
 698         }
 699 }
 700
 701 void
 702 TimeAxisView::show_selection (TimeSelection& ts)
 703 {
 704         double x1;
 705         double x2;
 706         double y2;
 707         SelectionRect *rect;
 708
 709         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 710                 (*i)->show_selection (ts);
 711         }
 712
 713         if (canvas_item_visible (selection_group)) {
 714                 while (!used_selection_rects.empty()) {
 715                         free_selection_rects.push_front (used_selection_rects.front());
 716                         used_selection_rects.pop_front();
 717                         free_selection_rects.front()->rect->hide();
 718                         free_selection_rects.front()->start_trim->hide();
 719                         free_selection_rects.front()->end_trim->hide();
 720                 }
 721                 selection_group->hide();
 722         }
 723
 724         selection_group->show();
 725         selection_group->raise_to_top();
 726
 727         for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
 728                 nframes_t start, end, cnt;
 729
 730                 start = (*i).start;
 731                 end = (*i).end;
 732                 cnt = end - start + 1;
 733
 734                 rect = get_selection_rect ((*i).id);
 735
 736                 x1 = _editor.frame_to_unit (start);
 737                 x2 = _editor.frame_to_unit (start + cnt - 1);
 738                 y2 = current_height();
 739
 740                 rect->rect->property_x1() = x1;
 741                 rect->rect->property_y1() = 1.0;
 742                 rect->rect->property_x2() = x2;
 743                 rect->rect->property_y2() = y2;
 744
 745                 // trim boxes are at the top for selections
 746
 747                 if (x2 > x1) {
 748                         rect->start_trim->property_x1() = x1;
 749                         rect->start_trim->property_y1() = 1.0;
 750                         rect->start_trim->property_x2() = x1 + trim_handle_size;
 751                         rect->start_trim->property_y2() = y2;
 752
 753                         rect->end_trim->property_x1() = x2 - trim_handle_size;
 754                         rect->end_trim->property_y1() = 1.0;
 755                         rect->end_trim->property_x2() = x2;
 756                         rect->end_trim->property_y2() = y2;
 757
 758                         rect->start_trim->show();
 759                         rect->end_trim->show();
 760                 } else {
 761                         rect->start_trim->hide();
 762                         rect->end_trim->hide();
 763                 }
 764
 765                 rect->rect->show ();
 766                 used_selection_rects.push_back (rect);
 767         }
 768 }
 769
 770 void
 771 TimeAxisView::reshow_selection (TimeSelection& ts)
 772 {
 773         show_selection (ts);
 774
 775         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 776                 (*i)->show_selection (ts);
 777         }
 778 }
 779
 780 void
 781 TimeAxisView::hide_selection ()
 782 {
 783         if (canvas_item_visible (selection_group)) {
 784                 while (!used_selection_rects.empty()) {
 785                         free_selection_rects.push_front (used_selection_rects.front());
 786                         used_selection_rects.pop_front();
 787                         free_selection_rects.front()->rect->hide();
 788                         free_selection_rects.front()->start_trim->hide();
 789                         free_selection_rects.front()->end_trim->hide();
 790                 }
 791                 selection_group->hide();
 792         }
 793
 794         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 795                 (*i)->hide_selection ();
 796         }
 797 }
 798
 799 void
 800 TimeAxisView::order_selection_trims (ArdourCanvas::Item *item, bool put_start_on_top)
 801 {
 802         /* find the selection rect this is for. we have the item corresponding to one
 803            of the trim handles.
 804          */
 805
 806         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 807                 if ((*i)->start_trim == item || (*i)->end_trim == item) {
 808
 809                         /* make one trim handle be "above" the other so that if they overlap,
 810                            the top one is the one last used.
 811                         */
 812
 813                         (*i)->rect->raise_to_top ();
 814                         (put_start_on_top ? (*i)->start_trim : (*i)->end_trim)->raise_to_top ();
 815                         (put_start_on_top ? (*i)->end_trim : (*i)->start_trim)->raise_to_top ();
 816
 817                         break;
 818                 }
 819         }
 820 }
 821
 822 SelectionRect *
 823 TimeAxisView::get_selection_rect (uint32_t id)
 824 {
 825         SelectionRect *rect;
 826
 827         /* check to see if we already have a visible rect for this particular selection ID */
 828
 829         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 830                 if ((*i)->id == id) {
 831                         return (*i);
 832                 }
 833         }
 834
 835         /* ditto for the free rect list */
 836
 837         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 838                 if ((*i)->id == id) {
 839                         SelectionRect* ret = (*i);
 840                         free_selection_rects.erase (i);
 841                         return ret;
 842                 }
 843         }
 844
 845         /* no existing matching rect, so go get a new one from the free list, or create one if there are none */
 846
 847         if (free_selection_rects.empty()) {
 848
 849                 rect = new SelectionRect;
 850
 851                 rect->rect = new SimpleRect (*selection_group);
 852                 rect->rect->property_outline_what() = 0x0;
 853                 rect->rect->property_x1() = 0.0;
 854                 rect->rect->property_y1() = 0.0;
 855                 rect->rect->property_x2() = 0.0;
 856                 rect->rect->property_y2() = 0.0;
 857                 rect->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
 858
 859                 rect->start_trim = new SimpleRect (*selection_group);
 860                 rect->start_trim->property_outline_what() = 0x0;
 861                 rect->start_trim->property_x1() = 0.0;
 862                 rect->start_trim->property_x2() = 0.0;
 863
 864                 rect->end_trim = new SimpleRect (*selection_group);
 865                 rect->end_trim->property_outline_what() = 0x0;
 866                 rect->end_trim->property_x1() = 0.0;
 867                 rect->end_trim->property_x2() = 0.0;
 868
 869                 free_selection_rects.push_front (rect);
 870
 871                 rect->rect->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_rect_event), rect->rect, rect));
 872                 rect->start_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_start_trim_event), rect->rect, rect));
 873                 rect->end_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_end_trim_event), rect->rect, rect));
 874         }
 875
 876         rect = free_selection_rects.front();
 877         rect->id = id;
 878         free_selection_rects.pop_front();
 879         return rect;
 880 }
 881
 882 struct null_deleter { void operator()(void const *) const {} };
 883
 884 bool
 885 TimeAxisView::is_child (TimeAxisView* tav)
 886 {
 887         return find (children.begin(), children.end(), boost::shared_ptr<TimeAxisView>(tav, null_deleter())) != children.end();
 888 }
 889
 890 void
 891 TimeAxisView::add_child (boost::shared_ptr<TimeAxisView> child)
 892 {
 893         children.push_back (child);
 894 }
 895
 896 void
 897 TimeAxisView::remove_child (boost::shared_ptr<TimeAxisView> child)
 898 {
 899         Children::iterator i;
 900
 901         if ((i = find (children.begin(), children.end(), child)) != children.end()) {
 902                 children.erase (i);
 903         }
 904 }
 905
 906 void
 907 TimeAxisView::get_selectables (nframes_t /*start*/, nframes_t /*end*/, double /*top*/, double /*bot*/, list<Selectable*>& /*result*/)
 908 {
 909         return;
 910 }
 911
 912 void
 913 TimeAxisView::get_inverted_selectables (Selection& /*sel*/, list<Selectable*>& /*result*/)
 914 {
 915         return;
 916 }
 917
 918 void
 919 TimeAxisView::add_ghost (RegionView* rv)
 920 {
 921         GhostRegion* gr = rv->add_ghost (*this);
 922
 923         if(gr) {
 924                 ghosts.push_back(gr);
 925         }
 926 }
 927
 928 void
 929 TimeAxisView::remove_ghost (RegionView* rv)
 930 {
 931         rv->remove_ghost_in (*this);
 932 }
 933
 934 void
 935 TimeAxisView::erase_ghost (GhostRegion* gr)
 936 {
 937         if (in_destructor) {
 938                 return;
 939         }
 940
 941         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 942                 if ((*i) == gr) {
 943                         ghosts.erase (i);
 944                         break;
 945                 }
 946         }
 947 }
 948
 949 bool
 950 TimeAxisView::touched (double top, double bot)
 951 {
 952         /* remember: this is X Window - coordinate space starts in upper left and moves down.
 953           y_position is the "origin" or "top" of the track.
 954         */
 955
 956         double mybot = _y_position + current_height();
 957
 958         return ((_y_position <= bot && _y_position >= top) ||
 959                 ((mybot <= bot) && (top < mybot)) ||
 960                 (mybot >= bot && _y_position < top));
 961 }
 962
 963 void
 964 TimeAxisView::set_parent (TimeAxisView& p)
 965 {
 966         parent = &p;
 967 }
 968
 969 bool
 970 TimeAxisView::has_state () const
 971 {
 972         return _has_state;
 973 }
 974
 975 TimeAxisView*
 976 TimeAxisView::get_parent_with_state ()
 977 {
 978         if (parent == 0) {
 979                 return 0;
 980         }
 981
 982         if (parent->has_state()) {
 983                 return parent;
 984         }
 985
 986         return parent->get_parent_with_state ();
 987 }
 988
 989
 990 XMLNode&
 991 TimeAxisView::get_state ()
 992 {
 993         /* XXX: is this method used? */
 994
 995         XMLNode* node = new XMLNode ("TAV-" + name());
 996         char buf[32];
 997
 998         snprintf (buf, sizeof(buf), "%u", height);
 999         node->add_property ("height", buf);
1000         node->add_property ("marked-for-display", (_marked_for_display ? "1" : "0"));
1001         return *node;
1002 }
1003
1004 int
1005 TimeAxisView::set_state (const XMLNode& node, int /*version*/)
1006 {
1007         const XMLProperty *prop;
1008
1009         /* XXX: I think this might be vestigial */
1010         if ((prop = node.property ("marked-for-display")) != 0) {
1011                 _marked_for_display = (prop->value() == "1");
1012         }
1013
1014         if ((prop = node.property ("shown-editor")) != 0) {
1015                 _marked_for_display = string_is_affirmative (prop->value ());
1016         }
1017
1018         if ((prop = node.property ("track-height")) != 0) {
1019
1020                 if (prop->value() == "largest") {
1021                         set_height (HeightLargest);
1022                 } else if (prop->value() == "large") {
1023                         set_height (HeightLarge);
1024                 } else if (prop->value() == "larger") {
1025                         set_height (HeightLarger);
1026                 } else if (prop->value() == "normal") {
1027                         set_height (HeightNormal);
1028                 } else if (prop->value() == "smaller") {
1029                         set_height (HeightSmaller);
1030                 } else if (prop->value() == "small") {
1031                         set_height (HeightSmall);
1032                 } else {
1033                         error << string_compose(_("unknown track height name \"%1\" in XML GUI information"), prop->value()) << endmsg;
1034                         set_height (HeightNormal);
1035                 }
1036
1037         } else if ((prop = node.property ("height")) != 0) {
1038
1039                 set_height (atoi (prop->value()));
1040
1041         } else {
1042
1043                 set_height (HeightNormal);
1044         }
1045
1046         return 0;
1047 }
1048
1049 void
1050 TimeAxisView::reset_height()
1051 {
1052         set_height (height);
1053
1054         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
1055                 (*i)->set_height ((*i)->height);
1056         }
1057 }
1058
1059 void
1060 TimeAxisView::compute_heights ()
1061 {
1062         Gtk::Window window (Gtk::WINDOW_TOPLEVEL);
1063         Gtk::Table two_row_table (2, 8);
1064         Gtk::Table one_row_table (1, 8);
1065         Button* buttons[5];
1066         const int border_width = 2;
1067         extra_height = (2 * border_width)
1068                 //+ 2   // 2 pixels for the hseparator between TimeAxisView control areas
1069                 + 6; // resizer button (3 x 2 pixel elements + 2 x 2 pixel gaps)
1070
1071         window.add (one_row_table);
1072
1073         one_row_table.set_border_width (border_width);
1074         one_row_table.set_row_spacings (0);
1075         one_row_table.set_col_spacings (0);
1076         one_row_table.set_homogeneous (true);
1077
1078         two_row_table.set_border_width (border_width);
1079         two_row_table.set_row_spacings (0);
1080         two_row_table.set_col_spacings (0);
1081         two_row_table.set_homogeneous (true);
1082
1083         for (int i = 0; i < 5; ++i) {
1084                 buttons[i] = manage (new Button (X_("f")));
1085                 buttons[i]->set_name ("TrackMuteButton");
1086         }
1087
1088         one_row_table.attach (*buttons[0], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1089
1090         one_row_table.show_all ();
1091         Gtk::Requisition req(one_row_table.size_request ());
1092
1093         // height required to show 1 row of buttons
1094
1095         smaller_height = req.height + extra_height;
1096 }
1097
1098 void
1099 TimeAxisView::show_name_label ()
1100 {
1101         if (!(name_packing & NameLabelPacked)) {
1102                 name_hbox.pack_start (name_label, true, true);
1103                 name_packing = NamePackingBits (name_packing | NameLabelPacked);
1104                 name_hbox.show ();
1105                 name_label.show ();
1106         }
1107 }
1108
1109 void
1110 TimeAxisView::show_name_entry ()
1111 {
1112         if (!(name_packing & NameEntryPacked)) {
1113                 name_hbox.pack_start (name_entry, true, true);
1114                 name_packing = NamePackingBits (name_packing | NameEntryPacked);
1115                 name_hbox.show ();
1116                 name_entry.show ();
1117         }
1118 }
1119
1120 void
1121 TimeAxisView::hide_name_label ()
1122 {
1123         if (name_packing & NameLabelPacked) {
1124                 name_hbox.remove (name_label);
1125                 name_packing = NamePackingBits (name_packing & ~NameLabelPacked);
1126         }
1127 }
1128
1129 void
1130 TimeAxisView::hide_name_entry ()
1131 {
1132         if (name_packing & NameEntryPacked) {
1133                 name_hbox.remove (name_entry);
1134                 name_packing = NamePackingBits (name_packing & ~NameEntryPacked);
1135         }
1136 }
1137
1138 void
1139 TimeAxisView::color_handler ()
1140 {
1141         for (list<GhostRegion*>::iterator i=ghosts.begin(); i != ghosts.end(); i++ ) {
1142                 (*i)->set_colors();
1143         }
1144
1145         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
1146
1147                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1148                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1149
1150                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1151                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1152
1153                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1154                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1155         }
1156
1157         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
1158
1159                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1160                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1161
1162                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1163                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1164
1165                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1166                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1167         }
1168 }
1169
1170 /** @return Pair: TimeAxisView, layer index.
1171  * TimeAxisView is non-0 if this object covers y, or one of its children does.
1172  * If the covering object is a child axis, then the child is returned.
1173  * TimeAxisView is 0 otherwise.
1174  * Layer index is the layer number if the TimeAxisView is valid and is in stacked
1175  * region display mode, otherwise 0.
1176  */
1177 std::pair<TimeAxisView*, layer_t>
1178 TimeAxisView::covers_y_position (double y)
1179 {
1180         if (hidden()) {
1181                 return std::make_pair ( (TimeAxisView *) 0, 0);
1182         }
1183
1184         if (_y_position <= y && y < (_y_position + height)) {
1185
1186                 /* work out the layer index if appropriate */
1187                 layer_t l = 0;
1188                 if (layer_display () == Stacked && view ()) {
1189                         /* compute layer */
1190                         l = layer_t ((_y_position + height - y) / (view()->child_height ()));
1191                         /* clamp to max layers to be on the safe side; sometimes the above calculation
1192                           returns a too-high value */
1193                         if (l >= view()->layers ()) {
1194                                 l = view()->layers() - 1;
1195                         }
1196                 }
1197
1198                 return std::make_pair (this, l);
1199         }
1200
1201         for (Children::const_iterator i = children.begin(); i != children.end(); ++i) {
1202
1203                 std::pair<TimeAxisView*, int> const r = (*i)->covers_y_position (y);
1204                 if (r.first) {
1205                         return r;
1206                 }
1207         }
1208
1209         return std::make_pair ( (TimeAxisView *) 0, 0);
1210 }
1211
1212 bool
1213 TimeAxisView::resizer_button_press (GdkEventButton* event)
1214 {
1215         _resize_drag_start = event->y_root;
1216         return true;
1217 }
1218
1219 bool
1220 TimeAxisView::resizer_button_release (GdkEventButton*)
1221 {
1222         _editor.stop_canvas_autoscroll ();
1223         _resize_drag_start = -1;
1224         return true;
1225 }
1226
1227 void
1228 TimeAxisView::idle_resize (uint32_t h)
1229 {
1230         set_height (h);
1231 }
1232
1233 bool
1234 TimeAxisView::resizer_motion (GdkEventMotion* ev)
1235 {
1236         if (_resize_drag_start >= 0) {
1237                 /* (ab)use the DragManager to do autoscrolling; adjust the event coordinates
1238                    into the trackview space that DragManager::motion_handler is expecting,
1239                    and then fake a DragManager motion event so that when maybe_autoscroll
1240                    asks DragManager for the current pointer position it will get the correct
1241                    answers.
1242                 */
1243                 int tx, ty;
1244                 resizer.translate_coordinates (*control_parent, ev->x, ev->y, tx, ty);
1245                 ev->y = ty + _editor.get_canvas_timebars_vsize ();
1246                 _editor.drags()->motion_handler ((GdkEvent *) ev, false);
1247                 _editor.maybe_autoscroll (false, true);
1248
1249                 /* now do the actual TAV resize */
1250                 int32_t const delta = (int32_t) floor (ev->y_root - _resize_drag_start);
1251                 _editor.add_to_idle_resize (this, delta);
1252                 _resize_drag_start = ev->y_root;
1253         }
1254
1255         return true;
1256 }
1257
1258 bool
1259 TimeAxisView::resizer_expose (GdkEventExpose* event)
1260 {
1261         int w, h, x, y, d;
1262         Glib::RefPtr<Gdk::Window> win (resizer.get_window());
1263         Glib::RefPtr<Gdk::GC> dark (resizer.get_style()->get_fg_gc (STATE_NORMAL));
1264         Glib::RefPtr<Gdk::GC> light (resizer.get_style()->get_bg_gc (STATE_NORMAL));
1265
1266         win->draw_rectangle (controls_ebox.get_style()->get_bg_gc(STATE_NORMAL),
1267                         true,
1268                         event->area.x,
1269                         event->area.y,
1270                         event->area.width,
1271                         event->area.height);
1272
1273         win->get_geometry (x, y, w, h, d);
1274
1275         /* handle/line #1 */
1276
1277         win->draw_line (dark, 0, 0, w - 2, 0);
1278         win->draw_point (dark, 0, 1);
1279         win->draw_line (light, 1, 1, w - 1, 1);
1280         win->draw_point (light, w - 1, 0);
1281
1282         /* handle/line #2 */
1283
1284         win->draw_line (dark, 0, 4, w - 2, 4);
1285         win->draw_point (dark, 0, 5);
1286         win->draw_line (light, 1, 5, w - 1, 5);
1287         win->draw_point (light, w - 1, 4);
1288
1289         /* use vertical resize mouse cursor */
1290         win->set_cursor(Gdk::Cursor(Gdk::SB_V_DOUBLE_ARROW));
1291
1292         return true;
1293 }
1294
1295 bool
1296 TimeAxisView::set_visibility (bool yn)
1297 {
1298         if (yn != marked_for_display()) {
1299                 if (yn) {
1300                         set_marked_for_display (true);
1301                         canvas_display()->show();
1302                 } else {
1303                         set_marked_for_display (false);
1304                         hide ();
1305                 }
1306                 return true; // things changed
1307         }
1308
1309         return false;
1310 }
1311
1312 uint32_t
1313 TimeAxisView::preset_height (Height h)
1314 {
1315         switch (h) {
1316         case HeightLargest:
1317                 return extra_height + 48 + 250;
1318         case HeightLarger:
1319                 return extra_height + 48 + 150;
1320         case HeightLarge:
1321                 return extra_height + 48 + 50;
1322         case HeightNormal:
1323                 return extra_height + 48;
1324         case HeightSmall:
1325                 return 27;
1326         case HeightSmaller:
1327                 return smaller_height;
1328         }
1329
1330         /* NOTREACHED */
1331         return 0;
1332 }