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
 400                 if (height <= preset_height (HeightSmaller) && height > preset_height (HeightSmall)) {
 401                         set_height (preset_height(HeightSmall));
 402                 }
 403                 else if ( height <= preset_height (HeightNormal) && height > preset_height (HeightSmaller)){
 404                         set_height (preset_height(HeightSmaller));
 405                 }
 406                 else {
 407                         set_height (height - step);
 408                 }
 409         }
 410 }
 411
 412 void
 413 TimeAxisView::set_heights (uint32_t h)
 414 {
 415         TrackSelection& ts (_editor.get_selection().tracks);
 416
 417         for (TrackSelection::iterator i = ts.begin(); i != ts.end(); ++i) {
 418                 (*i)->set_height (h);
 419         }
 420 }
 421
 422 void
 423 TimeAxisView::set_height (Height h)
 424 {
 425         set_height (preset_height (h));
 426 }
 427
 428 void
 429 TimeAxisView::set_height(uint32_t h)
 430 {
 431         time_axis_vbox.property_height_request () = h;
 432         height = h;
 433
 434         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 435                 (*i)->set_height ();
 436         }
 437
 438         if (canvas_item_visible (selection_group)) {
 439                 /* resize the selection rect */
 440                 show_selection (_editor.get_selection().time);
 441         }
 442 }
 443
 444 bool
 445 TimeAxisView::name_entry_key_release (GdkEventKey* ev)
 446 {
 447         TrackViewList::iterator i;
 448
 449         switch (ev->keyval) {
 450         case GDK_Escape:
 451                 name_entry.select_region (0,0);
 452                 controls_ebox.grab_focus ();
 453                 name_entry_changed ();
 454                 return true;
 455
 456         /* Shift+Tab Keys Pressed. Note that for Shift+Tab, GDK actually
 457          * generates a different ev->keyval, rather than setting
 458          * ev->state.
 459          */
 460         case GDK_ISO_Left_Tab:
 461         case GDK_Tab:
 462         {
 463                 name_entry_changed ();
 464                 TrackViewList const & allviews = _editor.get_track_views ();
 465                 TrackViewList::const_iterator i = find (allviews.begin(), allviews.end(), this);
 466                 if (ev->keyval == GDK_Tab) {
 467                         if (i != allviews.end()) {
 468                                 do {
 469                                         if (++i == allviews.end()) {
 470                                                 return true;
 471                                         }
 472                                 } while((*i)->hidden());
 473                         }
 474                 } else {
 475                         if (i != allviews.begin()) {
 476                                 do {
 477                                         if (i == allviews.begin()) {
 478                                                 return true;
 479                                         }
 480                                         --i;
 481                                 } while ((*i)->hidden());
 482                         }
 483                 }
 484
 485
 486                 /* resize to show editable name display */
 487
 488                 if ((*i)->current_height() <= preset_height (HeightSmaller)) {
 489                         (*i)->set_height (HeightSmaller);
 490                 }
 491
 492                 (*i)->name_entry.grab_focus();
 493         }
 494         return true;
 495
 496         case GDK_Up:
 497         case GDK_Down:
 498                 name_entry_changed ();
 499                 return true;
 500
 501         default:
 502                 break;
 503         }
 504
 505 #ifdef TIMEOUT_NAME_EDIT
 506         /* adapt the timeout to reflect the user's typing speed */
 507
 508         guint32 name_entry_timeout;
 509
 510         if (last_name_entry_key_press_event) {
 511                 /* timeout is 1/2 second or 5 times their current inter-char typing speed */
 512                 name_entry_timeout = std::max (500U, (5 * (ev->time - last_name_entry_key_press_event)));
 513         } else {
 514                 /* start with a 1 second timeout */
 515                 name_entry_timeout = 1000;
 516         }
 517
 518         last_name_entry_key_press_event = ev->time;
 519
 520         /* wait 1 seconds and if no more keys are pressed, act as if they pressed enter */
 521
 522         name_entry_key_timeout.disconnect();
 523         name_entry_key_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_timed_out), name_entry_timeout);
 524 #endif
 525
 526         return false;
 527 }
 528
 529 bool
 530 TimeAxisView::name_entry_focus_in (GdkEventFocus*)
 531 {
 532         name_entry.select_region (0, -1);
 533         name_entry.set_name ("EditorActiveTrackNameDisplay");
 534         return false;
 535 }
 536
 537 bool
 538 TimeAxisView::name_entry_focus_out (GdkEventFocus*)
 539 {
 540         /* clean up */
 541
 542         last_name_entry_key_press_event = 0;
 543         name_entry_key_timeout.disconnect ();
 544         name_entry.set_name ("EditorTrackNameDisplay");
 545         name_entry.select_region (0,0);
 546
 547         /* do the real stuff */
 548
 549         name_entry_changed ();
 550
 551         return false;
 552 }
 553
 554 bool
 555 TimeAxisView::name_entry_key_timed_out ()
 556 {
 557         name_entry_activated();
 558         return false;
 559 }
 560
 561 void
 562 TimeAxisView::name_entry_activated ()
 563 {
 564         controls_ebox.grab_focus();
 565 }
 566
 567 void
 568 TimeAxisView::name_entry_changed ()
 569 {
 570 }
 571
 572 bool
 573 TimeAxisView::name_entry_button_press (GdkEventButton *ev)
 574 {
 575         if (ev->button == 3) {
 576                 return true;
 577         }
 578         return false;
 579 }
 580
 581 bool
 582 TimeAxisView::name_entry_button_release (GdkEventButton *ev)
 583 {
 584         if (ev->button == 3) {
 585                 popup_display_menu (ev->time);
 586                 return true;
 587         }
 588         return false;
 589 }
 590
 591 void
 592 TimeAxisView::conditionally_add_to_selection ()
 593 {
 594         Selection& s (_editor.get_selection ());
 595
 596         if (!s.selected (this)) {
 597                 _editor.set_selected_track (*this, Selection::Set);
 598         }
 599 }
 600
 601 void
 602 TimeAxisView::popup_display_menu (guint32 when)
 603 {
 604         if (display_menu == 0) {
 605                 build_display_menu ();
 606         }
 607
 608         conditionally_add_to_selection ();
 609         display_menu->popup (1, when);
 610 }
 611
 612 void
 613 TimeAxisView::set_selected (bool yn)
 614 {
 615         if (yn == _selected) {
 616                 return;
 617         }
 618
 619         Selectable::set_selected (yn);
 620
 621         if (_selected) {
 622                 controls_ebox.set_name (controls_base_selected_name);
 623                 time_axis_vbox.set_name (controls_base_selected_name);
 624                 controls_vbox.set_name (controls_base_selected_name);
 625         } else {
 626                 controls_ebox.set_name (controls_base_unselected_name);
 627                 time_axis_vbox.set_name (controls_base_unselected_name);
 628                 controls_vbox.set_name (controls_base_unselected_name);
 629                 hide_selection ();
 630
 631                 /* children will be set for the yn=true case. but when deselecting
 632                    the editor only has a list of top-level trackviews, so we
 633                    have to do this here.
 634                 */
 635
 636                 for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 637                         (*i)->set_selected (false);
 638                 }
 639         }
 640
 641         resizer.queue_draw ();
 642 }
 643
 644 void
 645 TimeAxisView::build_display_menu ()
 646 {
 647         using namespace Menu_Helpers;
 648
 649         delete display_menu;
 650
 651         display_menu = new Menu;
 652         display_menu->set_name ("ArdourContextMenu");
 653
 654         // Just let implementing classes define what goes into the manu
 655 }
 656
 657 void
 658 TimeAxisView::set_samples_per_unit (double spu)
 659 {
 660         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 661                 (*i)->set_samples_per_unit (spu);
 662         }
 663
 664         AnalysisFeatureList::const_iterator i;
 665         list<ArdourCanvas::SimpleLine*>::iterator l;
 666 }
 667
 668 void
 669 TimeAxisView::show_timestretch (nframes_t start, nframes_t end)
 670 {
 671         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 672                 (*i)->show_timestretch (start, end);
 673         }
 674 }
 675
 676 void
 677 TimeAxisView::hide_timestretch ()
 678 {
 679         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 680                 (*i)->hide_timestretch ();
 681         }
 682 }
 683
 684 void
 685 TimeAxisView::show_selection (TimeSelection& ts)
 686 {
 687         double x1;
 688         double x2;
 689         double y2;
 690         SelectionRect *rect;
 691
 692         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 693                 (*i)->show_selection (ts);
 694         }
 695
 696         if (canvas_item_visible (selection_group)) {
 697                 while (!used_selection_rects.empty()) {
 698                         free_selection_rects.push_front (used_selection_rects.front());
 699                         used_selection_rects.pop_front();
 700                         free_selection_rects.front()->rect->hide();
 701                         free_selection_rects.front()->start_trim->hide();
 702                         free_selection_rects.front()->end_trim->hide();
 703                 }
 704                 selection_group->hide();
 705         }
 706
 707         selection_group->show();
 708         selection_group->raise_to_top();
 709
 710         for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
 711                 nframes_t start, end, cnt;
 712
 713                 start = (*i).start;
 714                 end = (*i).end;
 715                 cnt = end - start + 1;
 716
 717                 rect = get_selection_rect ((*i).id);
 718
 719                 x1 = _editor.frame_to_unit (start);
 720                 x2 = _editor.frame_to_unit (start + cnt - 1);
 721                 y2 = current_height();
 722
 723                 rect->rect->property_x1() = x1;
 724                 rect->rect->property_y1() = 1.0;
 725                 rect->rect->property_x2() = x2;
 726                 rect->rect->property_y2() = y2;
 727
 728                 // trim boxes are at the top for selections
 729
 730                 if (x2 > x1) {
 731                         rect->start_trim->property_x1() = x1;
 732                         rect->start_trim->property_y1() = 1.0;
 733                         rect->start_trim->property_x2() = x1 + trim_handle_size;
 734                         rect->start_trim->property_y2() = y2;
 735
 736                         rect->end_trim->property_x1() = x2 - trim_handle_size;
 737                         rect->end_trim->property_y1() = 1.0;
 738                         rect->end_trim->property_x2() = x2;
 739                         rect->end_trim->property_y2() = y2;
 740
 741                         rect->start_trim->show();
 742                         rect->end_trim->show();
 743                 } else {
 744                         rect->start_trim->hide();
 745                         rect->end_trim->hide();
 746                 }
 747
 748                 rect->rect->show ();
 749                 used_selection_rects.push_back (rect);
 750         }
 751 }
 752
 753 void
 754 TimeAxisView::reshow_selection (TimeSelection& ts)
 755 {
 756         show_selection (ts);
 757
 758         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 759                 (*i)->show_selection (ts);
 760         }
 761 }
 762
 763 void
 764 TimeAxisView::hide_selection ()
 765 {
 766         if (canvas_item_visible (selection_group)) {
 767                 while (!used_selection_rects.empty()) {
 768                         free_selection_rects.push_front (used_selection_rects.front());
 769                         used_selection_rects.pop_front();
 770                         free_selection_rects.front()->rect->hide();
 771                         free_selection_rects.front()->start_trim->hide();
 772                         free_selection_rects.front()->end_trim->hide();
 773                 }
 774                 selection_group->hide();
 775         }
 776
 777         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 778                 (*i)->hide_selection ();
 779         }
 780 }
 781
 782 void
 783 TimeAxisView::order_selection_trims (ArdourCanvas::Item *item, bool put_start_on_top)
 784 {
 785         /* find the selection rect this is for. we have the item corresponding to one
 786            of the trim handles.
 787          */
 788
 789         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 790                 if ((*i)->start_trim == item || (*i)->end_trim == item) {
 791
 792                         /* make one trim handle be "above" the other so that if they overlap,
 793                            the top one is the one last used.
 794                         */
 795
 796                         (*i)->rect->raise_to_top ();
 797                         (put_start_on_top ? (*i)->start_trim : (*i)->end_trim)->raise_to_top ();
 798                         (put_start_on_top ? (*i)->end_trim : (*i)->start_trim)->raise_to_top ();
 799
 800                         break;
 801                 }
 802         }
 803 }
 804
 805 SelectionRect *
 806 TimeAxisView::get_selection_rect (uint32_t id)
 807 {
 808         SelectionRect *rect;
 809
 810         /* check to see if we already have a visible rect for this particular selection ID */
 811
 812         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 813                 if ((*i)->id == id) {
 814                         return (*i);
 815                 }
 816         }
 817
 818         /* ditto for the free rect list */
 819
 820         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 821                 if ((*i)->id == id) {
 822                         SelectionRect* ret = (*i);
 823                         free_selection_rects.erase (i);
 824                         return ret;
 825                 }
 826         }
 827
 828         /* no existing matching rect, so go get a new one from the free list, or create one if there are none */
 829
 830         if (free_selection_rects.empty()) {
 831
 832                 rect = new SelectionRect;
 833
 834                 rect->rect = new SimpleRect (*selection_group);
 835                 rect->rect->property_outline_what() = 0x0;
 836                 rect->rect->property_x1() = 0.0;
 837                 rect->rect->property_y1() = 0.0;
 838                 rect->rect->property_x2() = 0.0;
 839                 rect->rect->property_y2() = 0.0;
 840                 rect->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
 841
 842                 rect->start_trim = new SimpleRect (*selection_group);
 843                 rect->start_trim->property_outline_what() = 0x0;
 844                 rect->start_trim->property_x1() = 0.0;
 845                 rect->start_trim->property_x2() = 0.0;
 846
 847                 rect->end_trim = new SimpleRect (*selection_group);
 848                 rect->end_trim->property_outline_what() = 0x0;
 849                 rect->end_trim->property_x1() = 0.0;
 850                 rect->end_trim->property_x2() = 0.0;
 851
 852                 free_selection_rects.push_front (rect);
 853
 854                 rect->rect->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_rect_event), rect->rect, rect));
 855                 rect->start_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_start_trim_event), rect->rect, rect));
 856                 rect->end_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_end_trim_event), rect->rect, rect));
 857         }
 858
 859         rect = free_selection_rects.front();
 860         rect->id = id;
 861         free_selection_rects.pop_front();
 862         return rect;
 863 }
 864
 865 struct null_deleter { void operator()(void const *) const {} };
 866
 867 bool
 868 TimeAxisView::is_child (TimeAxisView* tav)
 869 {
 870         return find (children.begin(), children.end(), boost::shared_ptr<TimeAxisView>(tav, null_deleter())) != children.end();
 871 }
 872
 873 void
 874 TimeAxisView::add_child (boost::shared_ptr<TimeAxisView> child)
 875 {
 876         children.push_back (child);
 877 }
 878
 879 void
 880 TimeAxisView::remove_child (boost::shared_ptr<TimeAxisView> child)
 881 {
 882         Children::iterator i;
 883
 884         if ((i = find (children.begin(), children.end(), child)) != children.end()) {
 885                 children.erase (i);
 886         }
 887 }
 888
 889 void
 890 TimeAxisView::get_selectables (nframes_t /*start*/, nframes_t /*end*/, double /*top*/, double /*bot*/, list<Selectable*>& /*result*/)
 891 {
 892         return;
 893 }
 894
 895 void
 896 TimeAxisView::get_inverted_selectables (Selection& /*sel*/, list<Selectable*>& /*result*/)
 897 {
 898         return;
 899 }
 900
 901 void
 902 TimeAxisView::add_ghost (RegionView* rv)
 903 {
 904         GhostRegion* gr = rv->add_ghost (*this);
 905
 906         if(gr) {
 907                 ghosts.push_back(gr);
 908         }
 909 }
 910
 911 void
 912 TimeAxisView::remove_ghost (RegionView* rv)
 913 {
 914         rv->remove_ghost_in (*this);
 915 }
 916
 917 void
 918 TimeAxisView::erase_ghost (GhostRegion* gr)
 919 {
 920         if (in_destructor) {
 921                 return;
 922         }
 923
 924         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 925                 if ((*i) == gr) {
 926                         ghosts.erase (i);
 927                         break;
 928                 }
 929         }
 930 }
 931
 932 bool
 933 TimeAxisView::touched (double top, double bot)
 934 {
 935         /* remember: this is X Window - coordinate space starts in upper left and moves down.
 936           y_position is the "origin" or "top" of the track.
 937         */
 938
 939         double mybot = _y_position + current_height();
 940
 941         return ((_y_position <= bot && _y_position >= top) ||
 942                 ((mybot <= bot) && (top < mybot)) ||
 943                 (mybot >= bot && _y_position < top));
 944 }
 945
 946 void
 947 TimeAxisView::set_parent (TimeAxisView& p)
 948 {
 949         parent = &p;
 950 }
 951
 952 bool
 953 TimeAxisView::has_state () const
 954 {
 955         return _has_state;
 956 }
 957
 958 TimeAxisView*
 959 TimeAxisView::get_parent_with_state ()
 960 {
 961         if (parent == 0) {
 962                 return 0;
 963         }
 964
 965         if (parent->has_state()) {
 966                 return parent;
 967         }
 968
 969         return parent->get_parent_with_state ();
 970 }
 971
 972
 973 XMLNode&
 974 TimeAxisView::get_state ()
 975 {
 976         /* XXX: is this method used? */
 977
 978         XMLNode* node = new XMLNode ("TAV-" + name());
 979         char buf[32];
 980
 981         snprintf (buf, sizeof(buf), "%u", height);
 982         node->add_property ("height", buf);
 983         node->add_property ("marked-for-display", (_marked_for_display ? "1" : "0"));
 984         return *node;
 985 }
 986
 987 int
 988 TimeAxisView::set_state (const XMLNode& node, int /*version*/)
 989 {
 990         const XMLProperty *prop;
 991
 992         /* XXX: I think this might be vestigial */
 993         if ((prop = node.property ("marked-for-display")) != 0) {
 994                 _marked_for_display = (prop->value() == "1");
 995         }
 996
 997         if ((prop = node.property ("shown-editor")) != 0) {
 998                 _marked_for_display = string_is_affirmative (prop->value ());
 999         }
1000
1001         if ((prop = node.property ("track-height")) != 0) {
1002
1003                 if (prop->value() == "largest") {
1004                         set_height (HeightLargest);
1005                 } else if (prop->value() == "large") {
1006                         set_height (HeightLarge);
1007                 } else if (prop->value() == "larger") {
1008                         set_height (HeightLarger);
1009                 } else if (prop->value() == "normal") {
1010                         set_height (HeightNormal);
1011                 } else if (prop->value() == "smaller") {
1012                         set_height (HeightSmaller);
1013                 } else if (prop->value() == "small") {
1014                         set_height (HeightSmall);
1015                 } else {
1016                         error << string_compose(_("unknown track height name \"%1\" in XML GUI information"), prop->value()) << endmsg;
1017                         set_height (HeightNormal);
1018                 }
1019
1020         } else if ((prop = node.property ("height")) != 0) {
1021
1022                 set_height (atoi (prop->value()));
1023
1024         } else {
1025
1026                 set_height (HeightNormal);
1027         }
1028
1029         return 0;
1030 }
1031
1032 void
1033 TimeAxisView::reset_height()
1034 {
1035         set_height (height);
1036
1037         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
1038                 (*i)->set_height ((*i)->height);
1039         }
1040 }
1041
1042 void
1043 TimeAxisView::compute_heights ()
1044 {
1045         Gtk::Window window (Gtk::WINDOW_TOPLEVEL);
1046         Gtk::Table two_row_table (2, 8);
1047         Gtk::Table one_row_table (1, 8);
1048         Button* buttons[5];
1049         const int border_width = 2;
1050         extra_height = (2 * border_width)
1051                 //+ 2   // 2 pixels for the hseparator between TimeAxisView control areas
1052                 + 6; // resizer button (3 x 2 pixel elements + 2 x 2 pixel gaps)
1053
1054         window.add (one_row_table);
1055
1056         one_row_table.set_border_width (border_width);
1057         one_row_table.set_row_spacings (0);
1058         one_row_table.set_col_spacings (0);
1059         one_row_table.set_homogeneous (true);
1060
1061         two_row_table.set_border_width (border_width);
1062         two_row_table.set_row_spacings (0);
1063         two_row_table.set_col_spacings (0);
1064         two_row_table.set_homogeneous (true);
1065
1066         for (int i = 0; i < 5; ++i) {
1067                 buttons[i] = manage (new Button (X_("f")));
1068                 buttons[i]->set_name ("TrackMuteButton");
1069         }
1070
1071         one_row_table.attach (*buttons[0], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1072
1073         one_row_table.show_all ();
1074         Gtk::Requisition req(one_row_table.size_request ());
1075
1076         // height required to show 1 row of buttons
1077
1078         smaller_height = req.height + extra_height;
1079 }
1080
1081 void
1082 TimeAxisView::show_name_label ()
1083 {
1084         if (!(name_packing & NameLabelPacked)) {
1085                 name_hbox.pack_start (name_label, true, true);
1086                 name_packing = NamePackingBits (name_packing | NameLabelPacked);
1087                 name_hbox.show ();
1088                 name_label.show ();
1089         }
1090 }
1091
1092 void
1093 TimeAxisView::show_name_entry ()
1094 {
1095         if (!(name_packing & NameEntryPacked)) {
1096                 name_hbox.pack_start (name_entry, true, true);
1097                 name_packing = NamePackingBits (name_packing | NameEntryPacked);
1098                 name_hbox.show ();
1099                 name_entry.show ();
1100         }
1101 }
1102
1103 void
1104 TimeAxisView::hide_name_label ()
1105 {
1106         if (name_packing & NameLabelPacked) {
1107                 name_hbox.remove (name_label);
1108                 name_packing = NamePackingBits (name_packing & ~NameLabelPacked);
1109         }
1110 }
1111
1112 void
1113 TimeAxisView::hide_name_entry ()
1114 {
1115         if (name_packing & NameEntryPacked) {
1116                 name_hbox.remove (name_entry);
1117                 name_packing = NamePackingBits (name_packing & ~NameEntryPacked);
1118         }
1119 }
1120
1121 void
1122 TimeAxisView::color_handler ()
1123 {
1124         for (list<GhostRegion*>::iterator i=ghosts.begin(); i != ghosts.end(); i++ ) {
1125                 (*i)->set_colors();
1126         }
1127
1128         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
1129
1130                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1131                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1132
1133                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1134                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1135
1136                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1137                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1138         }
1139
1140         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
1141
1142                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1143                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1144
1145                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1146                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1147
1148                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1149                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1150         }
1151 }
1152
1153 /** @return Pair: TimeAxisView, layer index.
1154  * TimeAxisView is non-0 if this object covers y, or one of its children does.
1155  * If the covering object is a child axis, then the child is returned.
1156  * TimeAxisView is 0 otherwise.
1157  * Layer index is the layer number if the TimeAxisView is valid and is in stacked
1158  * region display mode, otherwise 0.
1159  */
1160 std::pair<TimeAxisView*, layer_t>
1161 TimeAxisView::covers_y_position (double y)
1162 {
1163         if (hidden()) {
1164                 return std::make_pair ( (TimeAxisView *) 0, 0);
1165         }
1166
1167         if (_y_position <= y && y < (_y_position + height)) {
1168
1169                 /* work out the layer index if appropriate */
1170                 layer_t l = 0;
1171                 if (layer_display () == Stacked && view ()) {
1172                         /* compute layer */
1173                         l = layer_t ((_y_position + height - y) / (view()->child_height ()));
1174                         /* clamp to max layers to be on the safe side; sometimes the above calculation
1175                           returns a too-high value */
1176                         if (l >= view()->layers ()) {
1177                                 l = view()->layers() - 1;
1178                         }
1179                 }
1180
1181                 return std::make_pair (this, l);
1182         }
1183
1184         for (Children::const_iterator i = children.begin(); i != children.end(); ++i) {
1185
1186                 std::pair<TimeAxisView*, int> const r = (*i)->covers_y_position (y);
1187                 if (r.first) {
1188                         return r;
1189                 }
1190         }
1191
1192         return std::make_pair ( (TimeAxisView *) 0, 0);
1193 }
1194
1195 bool
1196 TimeAxisView::resizer_button_press (GdkEventButton* event)
1197 {
1198         _resize_drag_start = event->y_root;
1199         return true;
1200 }
1201
1202 bool
1203 TimeAxisView::resizer_button_release (GdkEventButton*)
1204 {
1205         _editor.stop_canvas_autoscroll ();
1206         _resize_drag_start = -1;
1207         return true;
1208 }
1209
1210 void
1211 TimeAxisView::idle_resize (uint32_t h)
1212 {
1213         set_height (h);
1214 }
1215
1216 bool
1217 TimeAxisView::resizer_motion (GdkEventMotion* ev)
1218 {
1219         if (_resize_drag_start >= 0) {
1220                 /* (ab)use the DragManager to do autoscrolling; adjust the event coordinates
1221                    into the trackview space that DragManager::motion_handler is expecting,
1222                    and then fake a DragManager motion event so that when maybe_autoscroll
1223                    asks DragManager for the current pointer position it will get the correct
1224                    answers.
1225                 */
1226                 int tx, ty;
1227                 resizer.translate_coordinates (*control_parent, ev->x, ev->y, tx, ty);
1228                 ev->y = ty + _editor.get_canvas_timebars_vsize ();
1229                 _editor.drags()->motion_handler ((GdkEvent *) ev, false);
1230                 _editor.maybe_autoscroll (false, true);
1231
1232                 /* now do the actual TAV resize */
1233                 int32_t const delta = (int32_t) floor (ev->y_root - _resize_drag_start);
1234                 _editor.add_to_idle_resize (this, delta);
1235                 _resize_drag_start = ev->y_root;
1236         }
1237
1238         return true;
1239 }
1240
1241 bool
1242 TimeAxisView::resizer_expose (GdkEventExpose* event)
1243 {
1244         int w, h, x, y, d;
1245         Glib::RefPtr<Gdk::Window> win (resizer.get_window());
1246         Glib::RefPtr<Gdk::GC> dark (resizer.get_style()->get_fg_gc (STATE_NORMAL));
1247         Glib::RefPtr<Gdk::GC> light (resizer.get_style()->get_bg_gc (STATE_NORMAL));
1248
1249         win->draw_rectangle (controls_ebox.get_style()->get_bg_gc(STATE_NORMAL),
1250                         true,
1251                         event->area.x,
1252                         event->area.y,
1253                         event->area.width,
1254                         event->area.height);
1255
1256         win->get_geometry (x, y, w, h, d);
1257
1258         /* handle/line #1 */
1259
1260         win->draw_line (dark, 0, 0, w - 2, 0);
1261         win->draw_point (dark, 0, 1);
1262         win->draw_line (light, 1, 1, w - 1, 1);
1263         win->draw_point (light, w - 1, 0);
1264
1265         /* handle/line #2 */
1266
1267         win->draw_line (dark, 0, 4, w - 2, 4);
1268         win->draw_point (dark, 0, 5);
1269         win->draw_line (light, 1, 5, w - 1, 5);
1270         win->draw_point (light, w - 1, 4);
1271
1272         /* use vertical resize mouse cursor */
1273         win->set_cursor(Gdk::Cursor(Gdk::SB_V_DOUBLE_ARROW));
1274
1275         return true;
1276 }
1277
1278 bool
1279 TimeAxisView::set_visibility (bool yn)
1280 {
1281         if (yn != marked_for_display()) {
1282                 if (yn) {
1283                         set_marked_for_display (true);
1284                         canvas_display()->show();
1285                 } else {
1286                         set_marked_for_display (false);
1287                         hide ();
1288                 }
1289                 return true; // things changed
1290         }
1291
1292         return false;
1293 }
1294
1295 uint32_t
1296 TimeAxisView::preset_height (Height h)
1297 {
1298         switch (h) {
1299         case HeightLargest:
1300                 return extra_height + 48 + 250;
1301         case HeightLarger:
1302                 return extra_height + 48 + 150;
1303         case HeightLarge:
1304                 return extra_height + 48 + 50;
1305         case HeightNormal:
1306                 return extra_height + 48;
1307         case HeightSmall:
1308                 return 27;
1309         case HeightSmaller:
1310                 return smaller_height;
1311         }
1312
1313         /* NOTREACHED */
1314         return 0;
1315 }