gtk2_ardour/time_axis_view.cc

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <cstdlib>
  21 #include <cmath>
  22 #include <algorithm>
  23 #include <string>
  24 #include <list>
  25
  26 #include <libgnomecanvasmm.h>
  27 #include <libgnomecanvasmm/canvas.h>
  28 #include <libgnomecanvasmm/item.h>
  29
  30 #include "pbd/error.h"
  31 #include "pbd/convert.h"
  32
  33 #include <gtkmm2ext/utils.h>
  34 #include <gtkmm2ext/selector.h>
  35
  36 #include "ardour/session.h"
  37 #include "ardour/utils.h"
  38 #include "ardour/ladspa_plugin.h"
  39 #include "ardour/processor.h"
  40 #include "ardour/location.h"
  41
  42 #include "ardour_ui.h"
  43 #include "global_signals.h"
  44 #include "gui_thread.h"
  45 #include "public_editor.h"
  46 #include "time_axis_view.h"
  47 #include "region_view.h"
  48 #include "ghostregion.h"
  49 #include "simplerect.h"
  50 #include "simpleline.h"
  51 #include "selection.h"
  52 #include "keyboard.h"
  53 #include "rgb_macros.h"
  54 #include "utils.h"
  55 #include "streamview.h"
  56 #include "editor_drag.h"
  57
  58 #include "i18n.h"
  59
  60 using namespace std;
  61 using namespace Gtk;
  62 using namespace Gdk;
  63 using namespace ARDOUR;
  64 using namespace PBD;
  65 using namespace Editing;
  66 using namespace ArdourCanvas;
  67 using Gtkmm2ext::Keyboard;
  68
  69 const double trim_handle_size = 6.0; /* pixels */
  70 uint32_t TimeAxisView::extra_height;
  71 uint32_t TimeAxisView::small_height;
  72 int const TimeAxisView::_max_order = 512;
  73 PBD::Signal1<void,TimeAxisView*> TimeAxisView::CatchDeletion;
  74
  75 TimeAxisView::TimeAxisView (ARDOUR::Session* sess, PublicEditor& ed, TimeAxisView* rent, Canvas& /*canvas*/)
  76         : AxisView (sess)
  77         , controls_table (2, 8)
  78         , _size_menu (0)
  79         , _y_position (0)
  80         , _editor (ed)
  81         , _order (0)
  82 {
  83         if (extra_height == 0) {
  84                 compute_heights ();
  85         }
  86
  87         _canvas_background = new Group (*ed.get_background_group (), 0.0, 0.0);
  88         _canvas_display = new Group (*ed.get_trackview_group (), 0.0, 0.0);
  89         _canvas_display->hide(); // reveal as needed
  90
  91         selection_group = new Group (*_canvas_display);
  92         selection_group->set_data (X_("timeselection"), (void *) 1);
  93         selection_group->hide();
  94
  95         _ghost_group = new Group (*_canvas_display);
  96         _ghost_group->lower_to_bottom();
  97         _ghost_group->show();
  98
  99         control_parent = 0;
 100         display_menu = 0;
 101         _hidden = false;
 102         in_destructor = false;
 103         height = 0;
 104         _effective_height = 0;
 105         parent = rent;
 106         last_name_entry_key_press_event = 0;
 107         name_packing = NamePackingBits (0);
 108         _resize_drag_start = -1;
 109
 110         /*
 111           Create the standard LHS Controls
 112           We create the top-level container and name add the name label here,
 113           subclasses can add to the layout as required
 114         */
 115
 116         name_entry.set_name ("EditorTrackNameDisplay");
 117         name_entry.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_release));
 118         name_entry.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_button_press));
 119         name_entry.signal_key_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_release));
 120         name_entry.signal_activate().connect (sigc::mem_fun(*this, &TimeAxisView::name_entry_activated));
 121         name_entry.signal_focus_in_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_in));
 122         name_entry.signal_focus_out_event().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_focus_out));
 123         Gtkmm2ext::set_size_request_to_display_given_text (name_entry, N_("gTortnam"), 10, 10); // just represents a short name
 124
 125         name_label.set_name ("TrackLabel");
 126         name_label.set_alignment (0.0, 0.5);
 127
 128         /* typically, either name_label OR name_entry are visible,
 129            but not both. its up to derived classes to show/hide them as they
 130            wish.
 131         */
 132
 133         name_hbox.show ();
 134
 135         controls_table.set_size_request (200);
 136         controls_table.set_row_spacings (0);
 137         controls_table.set_col_spacings (0);
 138         controls_table.set_homogeneous (true);
 139
 140         controls_table.attach (name_hbox, 0, 5, 0, 1,  Gtk::FILL|Gtk::EXPAND,  Gtk::FILL|Gtk::EXPAND, 3, 0);
 141         controls_table.show_all ();
 142         controls_table.set_no_show_all ();
 143
 144         resizer.set_size_request (10, 6);
 145         resizer.set_name ("ResizeHandle");
 146         resizer.signal_expose_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_expose));
 147         resizer.signal_button_press_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_press));
 148         resizer.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_button_release));
 149         resizer.signal_motion_notify_event().connect (sigc::mem_fun (*this, &TimeAxisView::resizer_motion));
 150
 151         resizer.set_events (Gdk::BUTTON_PRESS_MASK|
 152                         Gdk::BUTTON_RELEASE_MASK|
 153                         Gdk::POINTER_MOTION_MASK|
 154                         Gdk::SCROLL_MASK);
 155
 156         resizer_box.pack_start (resizer, false, false);
 157         resizer.show ();
 158         resizer_box.show();
 159
 160         HSeparator* separator = manage (new HSeparator());
 161
 162         controls_vbox.pack_start (controls_table, false, false);
 163         controls_vbox.pack_end (resizer_box, false, false);
 164         controls_vbox.show ();
 165
 166         //controls_ebox.set_name ("TimeAxisViewControlsBaseUnselected");
 167         controls_ebox.add (controls_vbox);
 168         controls_ebox.add_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK|SCROLL_MASK);
 169         controls_ebox.set_flags (CAN_FOCUS);
 170
 171         controls_ebox.signal_button_release_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_button_release));
 172         controls_ebox.signal_scroll_event().connect (sigc::mem_fun (*this, &TimeAxisView::controls_ebox_scroll), true);
 173         controls_ebox.show ();
 174
 175         controls_hbox.pack_start (controls_ebox, true, true);
 176         controls_hbox.show ();
 177
 178         time_axis_vbox.pack_start (controls_hbox, true, true);
 179         time_axis_vbox.pack_end (*separator, false, false);
 180         time_axis_vbox.show();
 181
 182         ColorsChanged.connect (sigc::mem_fun (*this, &TimeAxisView::color_handler));
 183
 184         GhostRegion::CatchDeletion.connect (*this, invalidator (*this), ui_bind (&TimeAxisView::erase_ghost, this, _1), gui_context());
 185 }
 186
 187 TimeAxisView::~TimeAxisView()
 188 {
 189         in_destructor = true;
 190
 191         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 192                 delete *i;
 193         }
 194
 195         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 196                 delete (*i)->rect;
 197                 delete (*i)->start_trim;
 198                 delete (*i)->end_trim;
 199
 200         }
 201
 202         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 203                 delete (*i)->rect;
 204                 delete (*i)->start_trim;
 205                 delete (*i)->end_trim;
 206         }
 207
 208         delete selection_group;
 209         selection_group = 0;
 210
 211         delete _canvas_background;
 212         _canvas_background = 0;
 213
 214         delete _canvas_display;
 215         _canvas_display = 0;
 216
 217         delete display_menu;
 218         display_menu = 0;
 219
 220         delete _size_menu;
 221 }
 222
 223 void
 224 TimeAxisView::hide ()
 225 {
 226         if (_hidden) {
 227                 return;
 228         }
 229
 230         _canvas_display->hide ();
 231         _canvas_background->hide ();
 232
 233         if (control_parent) {
 234                 control_parent->remove (time_axis_vbox);
 235                 control_parent = 0;
 236         }
 237
 238         _y_position = -1;
 239         _hidden = true;
 240
 241         /* now hide children */
 242
 243         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 244                 (*i)->hide ();
 245         }
 246
 247         /* if its hidden, it cannot be selected */
 248         _editor.get_selection().remove (this);
 249         /* and neither can its regions */
 250         _editor.get_selection().remove_regions (this);
 251
 252         Hiding ();
 253 }
 254
 255 /** Display this TimeAxisView as the nth component of the parent box, at y.
 256 *
 257 * @param y y position.
 258 * @param nth index for this TimeAxisView, increased if this view has children.
 259 * @param parent parent component.
 260 * @return height of this TimeAxisView.
 261 */
 262 guint32
 263 TimeAxisView::show_at (double y, int& nth, VBox *parent)
 264 {
 265         if (control_parent) {
 266                 control_parent->reorder_child (time_axis_vbox, nth);
 267         } else {
 268                 control_parent = parent;
 269                 parent->pack_start (time_axis_vbox, false, false);
 270                 parent->reorder_child (time_axis_vbox, nth);
 271         }
 272
 273         _order = nth;
 274
 275         if (_y_position != y) {
 276                 _canvas_display->property_y () = y;
 277                 _canvas_background->property_y () = y;
 278                 /* silly canvas */
 279                 _canvas_display->move (0.0, 0.0);
 280                 _canvas_background->move (0.0, 0.0);
 281                 _y_position = y;
 282
 283         }
 284
 285         _canvas_background->raise_to_top ();
 286         _canvas_display->raise_to_top ();
 287
 288         _canvas_background->show ();
 289         _canvas_display->show ();
 290
 291         _hidden = false;
 292
 293         _effective_height = current_height ();
 294
 295         /* now show relevant children */
 296
 297         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 298                 if ((*i)->marked_for_display()) {
 299                         ++nth;
 300                         _effective_height += (*i)->show_at (y + _effective_height, nth, parent);
 301                 } else {
 302                         (*i)->hide ();
 303                 }
 304         }
 305
 306         return _effective_height;
 307 }
 308
 309 void
 310 TimeAxisView::clip_to_viewport ()
 311 {
 312         if (marked_for_display()) {
 313                 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()) {
 314                         _canvas_background->hide ();
 315                         _canvas_display->hide ();
 316                         return;
 317                 }
 318                 _canvas_background->show ();
 319                 _canvas_display->show ();
 320         }
 321         return;
 322 }
 323
 324 bool
 325 TimeAxisView::controls_ebox_scroll (GdkEventScroll* ev)
 326 {
 327         if (Keyboard::some_magic_widget_has_focus()) {
 328                 return false;
 329         }
 330
 331         switch (ev->direction) {
 332         case GDK_SCROLL_UP:
 333                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 334                         step_height (false);
 335                         return true;
 336                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 337                         _editor.scroll_tracks_up_line();
 338                         return true;
 339                 }
 340                 break;
 341
 342         case GDK_SCROLL_DOWN:
 343                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
 344                         step_height (true);
 345                         return true;
 346                 } else if (Keyboard::no_modifiers_active (ev->state)) {
 347                         _editor.scroll_tracks_down_line();
 348                         return true;
 349                 }
 350                 break;
 351
 352         default:
 353                 /* no handling for left/right, yet */
 354                 break;
 355         }
 356
 357         return false;
 358 }
 359
 360 bool
 361 TimeAxisView::controls_ebox_button_release (GdkEventButton* ev)
 362 {
 363         switch (ev->button) {
 364         case 1:
 365                 selection_click (ev);
 366                 break;
 367
 368         case 3:
 369                 popup_display_menu (ev->time);
 370                 break;
 371         }
 372
 373         return true;
 374 }
 375
 376 void
 377 TimeAxisView::selection_click (GdkEventButton* ev)
 378 {
 379         Selection::Operation op = ArdourKeyboard::selection_type (ev->state);
 380         _editor.set_selected_track (*this, op, false);
 381 }
 382
 383
 384 /** Steps through the defined heights for this TrackView.
 385  *  @param coarser true if stepping should decrease in size, otherwise false.
 386  */
 387 void
 388 TimeAxisView::step_height (bool coarser)
 389 {
 390         static const uint32_t step = 25;
 391
 392         if (coarser) {
 393
 394                 if (height <= preset_height (HeightSmall)) {
 395                         return;
 396                 } else if (height <= preset_height (HeightNormal) && height > preset_height (HeightSmall)) {
 397                         set_height_enum (HeightSmall);
 398                 } else {
 399                         set_height (height - step);
 400                 }
 401
 402         } else {
 403
 404                 if (height <= preset_height(HeightSmall)) {
 405                         set_height_enum (HeightNormal);
 406                 } else {
 407                         set_height (height + step);
 408                 }
 409
 410         }
 411 }
 412
 413 void
 414 TimeAxisView::set_heights (uint32_t h)
 415 {
 416         TrackSelection& ts (_editor.get_selection().tracks);
 417
 418         for (TrackSelection::iterator i = ts.begin(); i != ts.end(); ++i) {
 419                 (*i)->set_height (h);
 420         }
 421 }
 422
 423 void
 424 TimeAxisView::set_height_enum (Height h, bool apply_to_selection)
 425 {
 426         if (apply_to_selection) {
 427                 _editor.get_selection().tracks.foreach_time_axis (boost::bind (&TimeAxisView::set_height_enum, _1, h, false));
 428         } else {
 429                 set_height (preset_height (h));
 430         }
 431 }
 432
 433 void
 434 TimeAxisView::set_height (uint32_t h)
 435 {
 436         if (h < preset_height (HeightSmall)) {
 437                 h = preset_height (HeightSmall);
 438         }
 439
 440         time_axis_vbox.property_height_request () = h;
 441         height = h;
 442
 443         char buf[32];
 444         snprintf (buf, sizeof (buf), "%u", height);
 445         set_gui_property ("height", buf);
 446
 447         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 448                 (*i)->set_height ();
 449         }
 450
 451         if (canvas_item_visible (selection_group)) {
 452                 /* resize the selection rect */
 453                 show_selection (_editor.get_selection().time);
 454         }
 455 }
 456
 457 bool
 458 TimeAxisView::name_entry_key_release (GdkEventKey* ev)
 459 {
 460         TrackViewList::iterator i;
 461
 462         switch (ev->keyval) {
 463         case GDK_Escape:
 464                 name_entry.select_region (0,0);
 465                 controls_ebox.grab_focus ();
 466                 name_entry_changed ();
 467                 return true;
 468
 469         /* Shift+Tab Keys Pressed. Note that for Shift+Tab, GDK actually
 470          * generates a different ev->keyval, rather than setting
 471          * ev->state.
 472          */
 473         case GDK_ISO_Left_Tab:
 474         case GDK_Tab:
 475         {
 476                 name_entry_changed ();
 477                 TrackViewList const & allviews = _editor.get_track_views ();
 478                 TrackViewList::const_iterator i = find (allviews.begin(), allviews.end(), this);
 479                 if (ev->keyval == GDK_Tab) {
 480                         if (i != allviews.end()) {
 481                                 do {
 482                                         if (++i == allviews.end()) {
 483                                                 return true;
 484                                         }
 485                                 } while((*i)->hidden());
 486                         }
 487                 } else {
 488                         if (i != allviews.begin()) {
 489                                 do {
 490                                         if (i == allviews.begin()) {
 491                                                 return true;
 492                                         }
 493                                         --i;
 494                                 } while ((*i)->hidden());
 495                         }
 496                 }
 497
 498                 (*i)->name_entry.grab_focus();
 499         }
 500         return true;
 501
 502         case GDK_Up:
 503         case GDK_Down:
 504                 name_entry_changed ();
 505                 return true;
 506
 507         default:
 508                 break;
 509         }
 510
 511 #ifdef TIMEOUT_NAME_EDIT
 512         /* adapt the timeout to reflect the user's typing speed */
 513
 514         guint32 name_entry_timeout;
 515
 516         if (last_name_entry_key_press_event) {
 517                 /* timeout is 1/2 second or 5 times their current inter-char typing speed */
 518                 name_entry_timeout = std::max (500U, (5 * (ev->time - last_name_entry_key_press_event)));
 519         } else {
 520                 /* start with a 1 second timeout */
 521                 name_entry_timeout = 1000;
 522         }
 523
 524         last_name_entry_key_press_event = ev->time;
 525
 526         /* wait 1 seconds and if no more keys are pressed, act as if they pressed enter */
 527
 528         name_entry_key_timeout.disconnect();
 529         name_entry_key_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &TimeAxisView::name_entry_key_timed_out), name_entry_timeout);
 530 #endif
 531
 532         return false;
 533 }
 534
 535 bool
 536 TimeAxisView::name_entry_focus_in (GdkEventFocus*)
 537 {
 538         name_entry.select_region (0, -1);
 539         name_entry.set_name ("EditorActiveTrackNameDisplay");
 540         return false;
 541 }
 542
 543 bool
 544 TimeAxisView::name_entry_focus_out (GdkEventFocus*)
 545 {
 546         /* clean up */
 547
 548         last_name_entry_key_press_event = 0;
 549         name_entry_key_timeout.disconnect ();
 550         name_entry.set_name ("EditorTrackNameDisplay");
 551         name_entry.select_region (0,0);
 552
 553         /* do the real stuff */
 554
 555         name_entry_changed ();
 556
 557         return false;
 558 }
 559
 560 bool
 561 TimeAxisView::name_entry_key_timed_out ()
 562 {
 563         name_entry_activated();
 564         return false;
 565 }
 566
 567 void
 568 TimeAxisView::name_entry_activated ()
 569 {
 570         controls_ebox.grab_focus();
 571 }
 572
 573 void
 574 TimeAxisView::name_entry_changed ()
 575 {
 576 }
 577
 578 bool
 579 TimeAxisView::name_entry_button_press (GdkEventButton *ev)
 580 {
 581         if (ev->button == 3) {
 582                 return true;
 583         }
 584         return false;
 585 }
 586
 587 bool
 588 TimeAxisView::name_entry_button_release (GdkEventButton *ev)
 589 {
 590         if (ev->button == 3) {
 591                 popup_display_menu (ev->time);
 592                 return true;
 593         }
 594         return false;
 595 }
 596
 597 void
 598 TimeAxisView::conditionally_add_to_selection ()
 599 {
 600         Selection& s (_editor.get_selection ());
 601
 602         if (!s.selected (this)) {
 603                 _editor.set_selected_track (*this, Selection::Set);
 604         }
 605 }
 606
 607 void
 608 TimeAxisView::popup_display_menu (guint32 when)
 609 {
 610         conditionally_add_to_selection ();
 611
 612         build_display_menu ();
 613         display_menu->popup (1, when);
 614 }
 615
 616 void
 617 TimeAxisView::set_selected (bool yn)
 618 {
 619         if (yn == _selected) {
 620                 return;
 621         }
 622
 623         Selectable::set_selected (yn);
 624
 625         if (_selected) {
 626                 controls_ebox.set_name (controls_base_selected_name);
 627                 time_axis_vbox.set_name (controls_base_selected_name);
 628                 controls_vbox.set_name (controls_base_selected_name);
 629         } else {
 630                 controls_ebox.set_name (controls_base_unselected_name);
 631                 time_axis_vbox.set_name (controls_base_unselected_name);
 632                 controls_vbox.set_name (controls_base_unselected_name);
 633                 hide_selection ();
 634
 635                 /* children will be set for the yn=true case. but when deselecting
 636                    the editor only has a list of top-level trackviews, so we
 637                    have to do this here.
 638                 */
 639
 640                 for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 641                         (*i)->set_selected (false);
 642                 }
 643         }
 644
 645         resizer.queue_draw ();
 646 }
 647
 648 void
 649 TimeAxisView::build_display_menu ()
 650 {
 651         using namespace Menu_Helpers;
 652
 653         delete display_menu;
 654
 655         display_menu = new Menu;
 656         display_menu->set_name ("ArdourContextMenu");
 657
 658         // Just let implementing classes define what goes into the manu
 659 }
 660
 661 void
 662 TimeAxisView::set_samples_per_unit (double spu)
 663 {
 664         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 665                 (*i)->set_samples_per_unit (spu);
 666         }
 667
 668         AnalysisFeatureList::const_iterator i;
 669         list<ArdourCanvas::SimpleLine*>::iterator l;
 670 }
 671
 672 void
 673 TimeAxisView::show_timestretch (framepos_t start, framepos_t end)
 674 {
 675         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 676                 (*i)->show_timestretch (start, end);
 677         }
 678 }
 679
 680 void
 681 TimeAxisView::hide_timestretch ()
 682 {
 683         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 684                 (*i)->hide_timestretch ();
 685         }
 686 }
 687
 688 void
 689 TimeAxisView::show_selection (TimeSelection& ts)
 690 {
 691         double x1;
 692         double x2;
 693         double y2;
 694         SelectionRect *rect;
 695
 696         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 697                 (*i)->show_selection (ts);
 698         }
 699
 700         if (canvas_item_visible (selection_group)) {
 701                 while (!used_selection_rects.empty()) {
 702                         free_selection_rects.push_front (used_selection_rects.front());
 703                         used_selection_rects.pop_front();
 704                         free_selection_rects.front()->rect->hide();
 705                         free_selection_rects.front()->start_trim->hide();
 706                         free_selection_rects.front()->end_trim->hide();
 707                 }
 708                 selection_group->hide();
 709         }
 710
 711         selection_group->show();
 712         selection_group->raise_to_top();
 713
 714         for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
 715                 framepos_t start, end;
 716                 framecnt_t cnt;
 717
 718                 start = (*i).start;
 719                 end = (*i).end;
 720                 cnt = end - start + 1;
 721
 722                 rect = get_selection_rect ((*i).id);
 723
 724                 x1 = _editor.frame_to_unit (start);
 725                 x2 = _editor.frame_to_unit (start + cnt - 1);
 726                 y2 = current_height();
 727
 728                 rect->rect->property_x1() = x1;
 729                 rect->rect->property_y1() = 1.0;
 730                 rect->rect->property_x2() = x2;
 731                 rect->rect->property_y2() = y2;
 732
 733                 // trim boxes are at the top for selections
 734
 735                 if (x2 > x1) {
 736                         rect->start_trim->property_x1() = x1;
 737                         rect->start_trim->property_y1() = 1.0;
 738                         rect->start_trim->property_x2() = x1 + trim_handle_size;
 739                         rect->start_trim->property_y2() = y2;
 740
 741                         rect->end_trim->property_x1() = x2 - trim_handle_size;
 742                         rect->end_trim->property_y1() = 1.0;
 743                         rect->end_trim->property_x2() = x2;
 744                         rect->end_trim->property_y2() = y2;
 745
 746                         rect->start_trim->show();
 747                         rect->end_trim->show();
 748                 } else {
 749                         rect->start_trim->hide();
 750                         rect->end_trim->hide();
 751                 }
 752
 753                 rect->rect->show ();
 754                 used_selection_rects.push_back (rect);
 755         }
 756 }
 757
 758 void
 759 TimeAxisView::reshow_selection (TimeSelection& ts)
 760 {
 761         show_selection (ts);
 762
 763         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 764                 (*i)->show_selection (ts);
 765         }
 766 }
 767
 768 void
 769 TimeAxisView::hide_selection ()
 770 {
 771         if (canvas_item_visible (selection_group)) {
 772                 while (!used_selection_rects.empty()) {
 773                         free_selection_rects.push_front (used_selection_rects.front());
 774                         used_selection_rects.pop_front();
 775                         free_selection_rects.front()->rect->hide();
 776                         free_selection_rects.front()->start_trim->hide();
 777                         free_selection_rects.front()->end_trim->hide();
 778                 }
 779                 selection_group->hide();
 780         }
 781
 782         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 783                 (*i)->hide_selection ();
 784         }
 785 }
 786
 787 void
 788 TimeAxisView::order_selection_trims (ArdourCanvas::Item *item, bool put_start_on_top)
 789 {
 790         /* find the selection rect this is for. we have the item corresponding to one
 791            of the trim handles.
 792          */
 793
 794         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 795                 if ((*i)->start_trim == item || (*i)->end_trim == item) {
 796
 797                         /* make one trim handle be "above" the other so that if they overlap,
 798                            the top one is the one last used.
 799                         */
 800
 801                         (*i)->rect->raise_to_top ();
 802                         (put_start_on_top ? (*i)->start_trim : (*i)->end_trim)->raise_to_top ();
 803                         (put_start_on_top ? (*i)->end_trim : (*i)->start_trim)->raise_to_top ();
 804
 805                         break;
 806                 }
 807         }
 808 }
 809
 810 SelectionRect *
 811 TimeAxisView::get_selection_rect (uint32_t id)
 812 {
 813         SelectionRect *rect;
 814
 815         /* check to see if we already have a visible rect for this particular selection ID */
 816
 817         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 818                 if ((*i)->id == id) {
 819                         return (*i);
 820                 }
 821         }
 822
 823         /* ditto for the free rect list */
 824
 825         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 826                 if ((*i)->id == id) {
 827                         SelectionRect* ret = (*i);
 828                         free_selection_rects.erase (i);
 829                         return ret;
 830                 }
 831         }
 832
 833         /* no existing matching rect, so go get a new one from the free list, or create one if there are none */
 834
 835         if (free_selection_rects.empty()) {
 836
 837                 rect = new SelectionRect;
 838
 839                 rect->rect = new SimpleRect (*selection_group);
 840                 rect->rect->property_outline_what() = 0x0;
 841                 rect->rect->property_x1() = 0.0;
 842                 rect->rect->property_y1() = 0.0;
 843                 rect->rect->property_x2() = 0.0;
 844                 rect->rect->property_y2() = 0.0;
 845                 rect->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
 846
 847                 rect->start_trim = new SimpleRect (*selection_group);
 848                 rect->start_trim->property_outline_what() = 0x0;
 849                 rect->start_trim->property_x1() = 0.0;
 850                 rect->start_trim->property_x2() = 0.0;
 851
 852                 rect->end_trim = new SimpleRect (*selection_group);
 853                 rect->end_trim->property_outline_what() = 0x0;
 854                 rect->end_trim->property_x1() = 0.0;
 855                 rect->end_trim->property_x2() = 0.0;
 856
 857                 free_selection_rects.push_front (rect);
 858
 859                 rect->rect->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_rect_event), rect->rect, rect));
 860                 rect->start_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_start_trim_event), rect->rect, rect));
 861                 rect->end_trim->signal_event().connect (sigc::bind (sigc::mem_fun (_editor, &PublicEditor::canvas_selection_end_trim_event), rect->rect, rect));
 862         }
 863
 864         rect = free_selection_rects.front();
 865         rect->id = id;
 866         free_selection_rects.pop_front();
 867         return rect;
 868 }
 869
 870 struct null_deleter { void operator()(void const *) const {} };
 871
 872 bool
 873 TimeAxisView::is_child (TimeAxisView* tav)
 874 {
 875         return find (children.begin(), children.end(), boost::shared_ptr<TimeAxisView>(tav, null_deleter())) != children.end();
 876 }
 877
 878 void
 879 TimeAxisView::add_child (boost::shared_ptr<TimeAxisView> child)
 880 {
 881         children.push_back (child);
 882 }
 883
 884 void
 885 TimeAxisView::remove_child (boost::shared_ptr<TimeAxisView> child)
 886 {
 887         Children::iterator i;
 888
 889         if ((i = find (children.begin(), children.end(), child)) != children.end()) {
 890                 children.erase (i);
 891         }
 892 }
 893
 894 /** Get selectable things within a given range.
 895  *  @param start Start time in session frames.
 896  *  @param end End time in session frames.
 897  *  @param top Top y range, in trackview coordinates (ie 0 is the top of the track view)
 898  *  @param bot Bottom y range, in trackview coordinates (ie 0 is the top of the track view)
 899  *  @param result Filled in with selectable things.
 900  */
 901 void
 902 TimeAxisView::get_selectables (framepos_t /*start*/, framepos_t /*end*/, double /*top*/, double /*bot*/, list<Selectable*>& /*result*/)
 903 {
 904         return;
 905 }
 906
 907 void
 908 TimeAxisView::get_inverted_selectables (Selection& /*sel*/, list<Selectable*>& /*result*/)
 909 {
 910         return;
 911 }
 912
 913 void
 914 TimeAxisView::add_ghost (RegionView* rv)
 915 {
 916         GhostRegion* gr = rv->add_ghost (*this);
 917
 918         if (gr) {
 919                 ghosts.push_back(gr);
 920         }
 921 }
 922
 923 void
 924 TimeAxisView::remove_ghost (RegionView* rv)
 925 {
 926         rv->remove_ghost_in (*this);
 927 }
 928
 929 void
 930 TimeAxisView::erase_ghost (GhostRegion* gr)
 931 {
 932         if (in_destructor) {
 933                 return;
 934         }
 935
 936         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 937                 if ((*i) == gr) {
 938                         ghosts.erase (i);
 939                         break;
 940                 }
 941         }
 942 }
 943
 944 bool
 945 TimeAxisView::touched (double top, double bot)
 946 {
 947         /* remember: this is X Window - coordinate space starts in upper left and moves down.
 948           y_position is the "origin" or "top" of the track.
 949         */
 950
 951         double mybot = _y_position + current_height();
 952
 953         return ((_y_position <= bot && _y_position >= top) ||
 954                 ((mybot <= bot) && (top < mybot)) ||
 955                 (mybot >= bot && _y_position < top));
 956 }
 957
 958 void
 959 TimeAxisView::set_parent (TimeAxisView& p)
 960 {
 961         parent = &p;
 962 }
 963
 964 void
 965 TimeAxisView::reset_height ()
 966 {
 967         set_height (height);
 968
 969         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
 970                 (*i)->set_height ((*i)->height);
 971         }
 972 }
 973
 974 void
 975 TimeAxisView::compute_heights ()
 976 {
 977         Gtk::Window window (Gtk::WINDOW_TOPLEVEL);
 978         Gtk::Table two_row_table (2, 8);
 979         Gtk::Table one_row_table (1, 8);
 980         Button* buttons[5];
 981         const int border_width = 2;
 982         extra_height = (2 * border_width)
 983                 //+ 2   // 2 pixels for the hseparator between TimeAxisView control areas
 984                 + 6; // resizer button (3 x 2 pixel elements + 2 x 2 pixel gaps)
 985
 986         window.add (one_row_table);
 987
 988         one_row_table.set_border_width (border_width);
 989         one_row_table.set_row_spacings (0);
 990         one_row_table.set_col_spacings (0);
 991         one_row_table.set_homogeneous (true);
 992
 993         two_row_table.set_border_width (border_width);
 994         two_row_table.set_row_spacings (0);
 995         two_row_table.set_col_spacings (0);
 996         two_row_table.set_homogeneous (true);
 997
 998         for (int i = 0; i < 5; ++i) {
 999                 buttons[i] = manage (new Button (X_("f")));
1000                 buttons[i]->set_name ("TrackMuteButton");
1001         }
1002
1003         one_row_table.attach (*buttons[0], 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
1004
1005         one_row_table.show_all ();
1006         Gtk::Requisition req(one_row_table.size_request ());
1007
1008         // height required to show 1 row of buttons
1009
1010         small_height = req.height + (2 * border_width);
1011 }
1012
1013 void
1014 TimeAxisView::show_name_label ()
1015 {
1016         if (!(name_packing & NameLabelPacked)) {
1017                 name_hbox.pack_start (name_label, true, true);
1018                 name_packing = NamePackingBits (name_packing | NameLabelPacked);
1019                 name_hbox.show ();
1020                 name_label.show ();
1021         }
1022 }
1023
1024 void
1025 TimeAxisView::show_name_entry ()
1026 {
1027         if (!(name_packing & NameEntryPacked)) {
1028                 name_hbox.pack_start (name_entry, true, true);
1029                 name_packing = NamePackingBits (name_packing | NameEntryPacked);
1030                 name_hbox.show ();
1031                 name_entry.show ();
1032         }
1033 }
1034
1035 void
1036 TimeAxisView::hide_name_label ()
1037 {
1038         if (name_packing & NameLabelPacked) {
1039                 name_hbox.remove (name_label);
1040                 name_packing = NamePackingBits (name_packing & ~NameLabelPacked);
1041         }
1042 }
1043
1044 void
1045 TimeAxisView::hide_name_entry ()
1046 {
1047         if (name_packing & NameEntryPacked) {
1048                 name_hbox.remove (name_entry);
1049                 name_packing = NamePackingBits (name_packing & ~NameEntryPacked);
1050         }
1051 }
1052
1053 void
1054 TimeAxisView::color_handler ()
1055 {
1056         for (list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); i++) {
1057                 (*i)->set_colors();
1058         }
1059
1060         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
1061
1062                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1063                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1064
1065                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1066                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1067
1068                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1069                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1070         }
1071
1072         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
1073
1074                 (*i)->rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectionRect.get();
1075                 (*i)->rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1076
1077                 (*i)->start_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1078                 (*i)->start_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1079
1080                 (*i)->end_trim->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1081                 (*i)->end_trim->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_Selection.get();
1082         }
1083 }
1084
1085 /** @return Pair: TimeAxisView, layer index.
1086  * TimeAxisView is non-0 if this object covers y, or one of its children does.
1087  * If the covering object is a child axis, then the child is returned.
1088  * TimeAxisView is 0 otherwise.
1089  * Layer index is the layer number if the TimeAxisView is valid and is in stacked
1090  * region display mode, otherwise 0.
1091  */
1092 std::pair<TimeAxisView*, layer_t>
1093 TimeAxisView::covers_y_position (double y)
1094 {
1095         if (hidden()) {
1096                 return std::make_pair ((TimeAxisView *) 0, 0);
1097         }
1098
1099         if (_y_position <= y && y < (_y_position + height)) {
1100
1101                 /* work out the layer index if appropriate */
1102                 layer_t l = 0;
1103                 if (layer_display () == Stacked && view ()) {
1104                         /* compute layer */
1105                         l = layer_t ((_y_position + height - y) / (view()->child_height ()));
1106                         /* clamp to max layers to be on the safe side; sometimes the above calculation
1107                           returns a too-high value */
1108                         if (l >= view()->layers ()) {
1109                                 l = view()->layers() - 1;
1110                         }
1111                 }
1112
1113                 return std::make_pair (this, l);
1114         }
1115
1116         for (Children::const_iterator i = children.begin(); i != children.end(); ++i) {
1117
1118                 std::pair<TimeAxisView*, int> const r = (*i)->covers_y_position (y);
1119                 if (r.first) {
1120                         return r;
1121                 }
1122         }
1123
1124         return std::make_pair ((TimeAxisView *) 0, 0);
1125 }
1126
1127 bool
1128 TimeAxisView::resizer_button_press (GdkEventButton* event)
1129 {
1130         _resize_drag_start = event->y_root;
1131         return true;
1132 }
1133
1134 bool
1135 TimeAxisView::resizer_button_release (GdkEventButton*)
1136 {
1137         _editor.stop_canvas_autoscroll ();
1138         _resize_drag_start = -1;
1139         return true;
1140 }
1141
1142 void
1143 TimeAxisView::idle_resize (uint32_t h)
1144 {
1145         set_height (h);
1146 }
1147
1148 bool
1149 TimeAxisView::resizer_motion (GdkEventMotion* ev)
1150 {
1151         if (_resize_drag_start >= 0) {
1152                 /* (ab)use the DragManager to do autoscrolling; adjust the event coordinates
1153                    into the world coordinate space that DragManager::motion_handler is expecting,
1154                    and then fake a DragManager motion event so that when maybe_autoscroll
1155                    asks DragManager for the current pointer position it will get the correct
1156                    answers.
1157                 */
1158                 int tx, ty;
1159                 resizer.translate_coordinates (*control_parent, ev->x, ev->y, tx, ty);
1160                 ev->y = ty - _editor.get_trackview_group_vertical_offset();
1161                 _editor.drags()->motion_handler ((GdkEvent *) ev, false);
1162                 _editor.maybe_autoscroll (false, true);
1163
1164                 /* now do the actual TAV resize */
1165                 int32_t const delta = (int32_t) floor (ev->y_root - _resize_drag_start);
1166                 _editor.add_to_idle_resize (this, delta);
1167                 _resize_drag_start = ev->y_root;
1168         }
1169
1170         return true;
1171 }
1172
1173 bool
1174 TimeAxisView::resizer_expose (GdkEventExpose* event)
1175 {
1176         int w, h, x, y, d;
1177         Glib::RefPtr<Gdk::Window> win (resizer.get_window());
1178         Glib::RefPtr<Gdk::GC> dark (resizer.get_style()->get_fg_gc (STATE_NORMAL));
1179         Glib::RefPtr<Gdk::GC> light (resizer.get_style()->get_bg_gc (STATE_NORMAL));
1180
1181         win->draw_rectangle (controls_ebox.get_style()->get_bg_gc(STATE_NORMAL),
1182                         true,
1183                         event->area.x,
1184                         event->area.y,
1185                         event->area.width,
1186                         event->area.height);
1187
1188         win->get_geometry (x, y, w, h, d);
1189
1190         /* handle/line #1 */
1191
1192         win->draw_line (dark, 0, 0, w - 2, 0);
1193         win->draw_point (dark, 0, 1);
1194         win->draw_line (light, 1, 1, w - 1, 1);
1195         win->draw_point (light, w - 1, 0);
1196
1197         /* handle/line #2 */
1198
1199         win->draw_line (dark, 0, 4, w - 2, 4);
1200         win->draw_point (dark, 0, 5);
1201         win->draw_line (light, 1, 5, w - 1, 5);
1202         win->draw_point (light, w - 1, 4);
1203
1204         /* use vertical resize mouse cursor */
1205         win->set_cursor(Gdk::Cursor(Gdk::SB_V_DOUBLE_ARROW));
1206
1207         return true;
1208 }
1209
1210 uint32_t
1211 TimeAxisView::preset_height (Height h)
1212 {
1213         switch (h) {
1214         case HeightLargest:
1215                 return extra_height + 48 + 250;
1216         case HeightLarger:
1217                 return extra_height + 48 + 150;
1218         case HeightLarge:
1219                 return extra_height + 48 + 50;
1220         case HeightNormal:
1221                 return extra_height + 48;
1222         case HeightSmall:
1223                 return small_height;
1224         }
1225
1226         /* NOTREACHED */
1227         return 0;
1228 }
1229
1230 /** @return Child time axis views that are not hidden */
1231 TimeAxisView::Children
1232 TimeAxisView::get_child_list ()
1233 {
1234         Children c;
1235
1236         for (Children::iterator i = children.begin(); i != children.end(); ++i) {
1237                 if (!(*i)->hidden()) {
1238                         c.push_back(*i);
1239                 }
1240         }
1241
1242         return c;
1243 }
1244
1245 void
1246 TimeAxisView::build_size_menu ()
1247 {
1248         if (_size_menu && _size_menu->gobj ()) {
1249                 return;
1250         }
1251
1252         delete _size_menu;
1253
1254         using namespace Menu_Helpers;
1255
1256         _size_menu = new Menu;
1257         _size_menu->set_name ("ArdourContextMenu");
1258         MenuList& items = _size_menu->items();
1259
1260         items.push_back (MenuElem (_("Largest"), sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_height_enum), HeightLargest, true)));
1261         items.push_back (MenuElem (_("Larger"),  sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_height_enum), HeightLarger, true)));
1262         items.push_back (MenuElem (_("Large"),   sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_height_enum), HeightLarge, true)));
1263         items.push_back (MenuElem (_("Normal"),  sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_height_enum), HeightNormal, true)));
1264         items.push_back (MenuElem (_("Small"),   sigc::bind (sigc::mem_fun (*this, &TimeAxisView::set_height_enum), HeightSmall, true)));
1265 }
1266
1267 void
1268 TimeAxisView::reset_visual_state ()
1269 {
1270         /* this method is not required to trigger a global redraw */
1271
1272         string str = gui_property ("height");
1273
1274         if (!str.empty()) {
1275                 set_height (atoi (str));
1276         } else {
1277                 set_height (preset_height (HeightNormal));
1278         }
1279 }