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