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     $Id$
  19 */
  20
  21 #include <cstdlib>
  22 #include <cmath>
  23 #include <algorithm>
  24 #include <string>
  25 #include <list>
  26
  27 #include <pbd/error.h>
  28
  29 #include <gtkmm2ext/utils.h>
  30 #include <gtkmm2ext/selector.h>
  31 #include <gtkmm2ext/stop_signal.h>
  32
  33 #include <ardour/session.h>
  34 #include <ardour/utils.h>
  35 #include <ardour/ladspa_plugin.h>
  36 #include <ardour/insert.h>
  37 #include <ardour/location.h>
  38
  39 #include "ardour_ui.h"
  40 #include "public_editor.h"
  41 #include "time_axis_view.h"
  42 #include "canvas-simplerect.h"
  43 #include "selection.h"
  44 #include "keyboard.h"
  45 #include "rgb_macros.h"
  46
  47 #include "i18n.h"
  48
  49 using namespace Gtk;
  50 /*can't use sigc namespace while we have the string_compose() in libs/pbd3/pbd */
  51 //using namespace sigc;
  52 using namespace ARDOUR;
  53 using namespace Editing;
  54
  55 const double trim_handle_size = 6.0; /* pixels */
  56
  57 TimeAxisView::TimeAxisView(ARDOUR::Session& sess, PublicEditor& ed, TimeAxisView* rent, Gtk::Widget *canvas)
  58         : AxisView(sess),
  59           editor(ed),
  60           controls_table (2, 9)
  61 {
  62         canvas_display = gnome_canvas_item_new (gnome_canvas_root(GNOME_CANVAS(canvas->gobj())),
  63                                               gnome_canvas_group_get_type(),
  64                                               "x", 0.0,
  65                                               "y", 0.0,
  66                                               NULL);
  67
  68         selection_group = gnome_canvas_item_new (GNOME_CANVAS_GROUP(canvas_display),
  69                                                gnome_canvas_group_get_type (),
  70                                                NULL);
  71         gnome_canvas_item_hide (selection_group);
  72
  73         control_parent = 0;
  74         display_menu = 0;
  75         size_menu = 0;
  76         _marked_for_display = false;
  77         _hidden = false;
  78         height = 0;
  79         effective_height = 0;
  80         parent = rent;
  81         _has_state = false;
  82
  83         /*
  84           Create the standard LHS Controls
  85           We create the top-level container and name add the name label here,
  86           subclasses can add to the layout as required
  87         */
  88
  89         name_entry.set_name ("EditorTrackNameDisplay");
  90         name_entry.signal_button_release_event().connect (mem_fun (*this, &TimeAxisView::name_entry_button_release));
  91         name_entry.signal_button_press_event().connect (mem_fun (*this, &TimeAxisView::name_entry_button_press));
  92
  93         name_entry.signal_focus_in_event().connect (sigc::ptr_fun (ARDOUR_UI::generic_focus_in_event));
  94         name_entry.signal_focus_out_event().connect (sigc::ptr_fun (ARDOUR_UI::generic_focus_out_event));
  95
  96         Gtkmm2ext::set_size_request_to_display_given_text (name_entry, N_("gTortnam"), 10, 10); // just represents a short name
  97
  98         name_label.set_name ("TrackLabel");
  99         name_label.set_alignment (0.0, 0.5);
 100
 101         // name_hbox.set_border_width (2);
 102         // name_hbox.set_spacing (5);
 103
 104         /* typically, either name_label OR name_entry are visible,
 105            but not both. its up to derived classes to show/hide them as they
 106            wish.
 107         */
 108
 109         name_hbox.pack_start (name_label, true, true);
 110         name_hbox.pack_start (name_entry, true, true);
 111         name_hbox.show ();
 112
 113         controls_table.set_border_width (2);
 114         controls_table.set_row_spacings (0);
 115         controls_table.set_col_spacings (0);
 116         controls_table.set_homogeneous (true);
 117         controls_table.show ();
 118
 119         controls_table.attach (name_hbox, 0, 5, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND);
 120
 121         controls_table.show ();
 122
 123         controls_vbox.pack_start (controls_table, false, false);
 124         controls_vbox.show ();
 125
 126         controls_ebox.set_name ("TimeAxisViewControlsBaseUnselected");
 127         controls_ebox.add (controls_vbox);
 128         controls_ebox.set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
 129         controls_ebox.set_flags (Gtk::CAN_FOCUS);
 130
 131         controls_ebox.signal_button_release_event().connect (mem_fun (*this, &TimeAxisView::controls_ebox_button_release));
 132
 133         controls_lhs_pad.set_name ("TimeAxisViewControlsPadding");
 134         controls_hbox.pack_start (controls_lhs_pad,false,false);
 135         controls_hbox.pack_start (controls_ebox,true,true);
 136         controls_hbox.show ();
 137
 138         controls_frame.add (controls_hbox);
 139         controls_frame.set_name ("TimeAxisViewControlsBaseUnselected");
 140         controls_frame.set_shadow_type (Gtk::SHADOW_OUT);
 141 }
 142
 143 TimeAxisView::~TimeAxisView()
 144 {
 145         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 146                 delete *i;
 147         }
 148
 149         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 150                 gtk_object_destroy (GTK_OBJECT((*i)->rect));
 151                 gtk_object_destroy (GTK_OBJECT((*i)->start_trim));
 152                 gtk_object_destroy (GTK_OBJECT((*i)->end_trim));
 153         }
 154
 155         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 156                 gtk_object_destroy (GTK_OBJECT((*i)->rect));
 157                 gtk_object_destroy (GTK_OBJECT((*i)->start_trim));
 158                 gtk_object_destroy (GTK_OBJECT((*i)->end_trim));
 159         }
 160
 161         if (selection_group) {
 162                 gtk_object_destroy (GTK_OBJECT (selection_group));
 163                 selection_group = 0;
 164         }
 165
 166         if (canvas_display) {
 167                 gtk_object_destroy (GTK_OBJECT (canvas_display));
 168                 canvas_display = 0;
 169         }
 170
 171         if (display_menu) {
 172                 delete display_menu;
 173                 display_menu = 0;
 174         }
 175
 176         if (size_menu) {
 177                 delete size_menu;
 178                 size_menu = 0;
 179         }
 180 }
 181
 182 guint32
 183 TimeAxisView::show_at (double y, int& nth, VBox *parent)
 184 {
 185         gdouble ix1, ix2, iy1, iy2;
 186         effective_height = 0;
 187
 188         if (control_parent) {
 189                 control_parent->reorder_child (controls_frame, nth);
 190         } else {
 191                 control_parent = parent;
 192                 parent->pack_start (controls_frame, false, false);
 193                 parent->reorder_child (controls_frame, nth);
 194         }
 195
 196         controls_frame.show ();
 197         controls_ebox.show ();
 198
 199         /* the coordinates used here are in the system of the
 200            item's parent ...
 201         */
 202
 203         gnome_canvas_item_get_bounds (canvas_display, &ix1, &iy1, &ix2, &iy2);
 204         gnome_canvas_item_i2w (canvas_display->parent, &ix1, &iy1);
 205         if (iy1 < 0) {
 206                 iy1 = 0;
 207         }
 208         gnome_canvas_item_move (canvas_display, 0.0, y - iy1);
 209         gnome_canvas_item_show (canvas_display); /* XXX not necessary */
 210
 211         y_position = y;
 212         order = nth;
 213         _hidden = false;
 214
 215         effective_height = height;
 216
 217         /* now show children */
 218
 219         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 220
 221                 if ((*i)->marked_for_display()) {
 222                         gnome_canvas_item_show ((*i)->canvas_display);
 223                 }
 224
 225                 if (GTK_OBJECT_FLAGS(GTK_OBJECT((*i)->canvas_display)) & GNOME_CANVAS_ITEM_VISIBLE) {
 226                         ++nth;
 227                         effective_height += (*i)->show_at (y + effective_height, nth, parent);
 228                 }
 229         }
 230
 231         return effective_height;
 232 }
 233
 234 gint
 235 TimeAxisView::controls_ebox_button_release (GdkEventButton* ev)
 236 {
 237         switch (ev->button) {
 238         case 1:
 239                 selection_click (ev);
 240                 break;
 241
 242         case 3:
 243                 popup_display_menu (ev->time);
 244                 break;
 245
 246         case 4:
 247                 if (Keyboard::no_modifier_keys_pressed (ev)) {
 248                         editor.scroll_tracks_up_line ();
 249                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
 250                         step_height (true);
 251                 }
 252                 break;
 253
 254         case 5:
 255                 if (Keyboard::no_modifier_keys_pressed (ev)) {
 256                         editor.scroll_tracks_down_line ();
 257                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
 258                         step_height (false);
 259                 }
 260                 break;
 261
 262
 263         }
 264
 265         return TRUE;
 266 }
 267
 268 void
 269 TimeAxisView::selection_click (GdkEventButton* ev)
 270 {
 271         if (Keyboard::modifier_state_contains (ev->state, Keyboard::Shift)) {
 272
 273                 if (editor.get_selection().selected (this)) {
 274                         editor.get_selection().remove (this);
 275                 } else {
 276                         editor.get_selection().add (this);
 277                 }
 278
 279         } else {
 280
 281                 editor.get_selection().set (this);
 282         }
 283 }
 284
 285 void
 286 TimeAxisView::hide ()
 287 {
 288         if (_hidden) {
 289                 return;
 290         }
 291
 292         gnome_canvas_item_hide (canvas_display);
 293         controls_frame.hide ();
 294
 295         if (control_parent) {
 296                 control_parent->remove (controls_frame);
 297                 control_parent = 0;
 298         }
 299
 300         y_position = -1;
 301         _hidden = true;
 302
 303         /* now hide children */
 304
 305         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 306                 (*i)->hide ();
 307         }
 308
 309         Hiding ();
 310 }
 311
 312 void
 313 TimeAxisView::step_height (bool bigger)
 314 {
 315         switch (height) {
 316         case Largest:
 317                 if (!bigger) set_height (Large);
 318                 break;
 319         case Large:
 320                 if (bigger) set_height (Largest);
 321                 else set_height (Larger);
 322                 break;
 323         case Larger:
 324                 if (bigger) set_height (Large);
 325                 else set_height (Normal);
 326                 break;
 327         case Normal:
 328                 if (bigger) set_height (Larger);
 329                 else set_height (Smaller);
 330                 break;
 331         case Smaller:
 332                 if (bigger) set_height (Normal);
 333                 else set_height (Small);
 334                 break;
 335         case Small:
 336                 if (bigger) set_height (Smaller);
 337                 break;
 338         }
 339 }
 340
 341
 342 void
 343 TimeAxisView::set_height (TrackHeight h)
 344 {
 345         height = (guint32) h;
 346         controls_frame.set_size_request (-1, height);
 347
 348         if (GTK_OBJECT_FLAGS(GTK_OBJECT(selection_group)) & GNOME_CANVAS_ITEM_VISIBLE) {
 349                 /* resize the selection rect */
 350                 show_selection (editor.get_selection().time);
 351         }
 352
 353 //      for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 354 //              (*i)->set_height (h);
 355 //      }
 356
 357 }
 358
 359 bool
 360 TimeAxisView::name_entry_button_press (GdkEventButton *ev)
 361 {
 362         if (ev->button == 3) {
 363                 return true;
 364         }
 365         return false
 366 }
 367
 368 bool
 369 TimeAxisView::name_entry_button_release (GdkEventButton *ev)
 370 {
 371         if (ev->button == 3) {
 372                 popup_display_menu (ev->time);
 373                 return true;
 374         }
 375         return false;
 376 }
 377
 378 void
 379 TimeAxisView::popup_display_menu (guint32 when)
 380 {
 381         if (display_menu == 0) {
 382                 build_display_menu ();
 383         }
 384         display_menu->popup (1, when);
 385 }
 386
 387 gint
 388 TimeAxisView::size_click (GdkEventButton *ev)
 389 {
 390         popup_size_menu (ev->time);
 391         return TRUE;
 392 }
 393
 394 void
 395 TimeAxisView::popup_size_menu (guint32 when)
 396 {
 397         if (size_menu == 0) {
 398                 build_size_menu ();
 399         }
 400         size_menu->popup (1, when);
 401 }
 402
 403 void
 404 TimeAxisView::set_selected (bool yn)
 405 {
 406         AxisView::set_selected (yn);
 407
 408         if (_selected) {
 409                 controls_ebox.set_name (controls_base_selected_name);
 410                 controls_frame.set_name (controls_base_selected_name);
 411
 412                 /* propagate any existing selection, if the mode is right */
 413
 414                 if (editor.current_mouse_mode() == Editing::MouseRange && !editor.get_selection().time.empty()) {
 415                         show_selection (editor.get_selection().time);
 416                 }
 417
 418         } else {
 419                 controls_ebox.set_name (controls_base_unselected_name);
 420                 controls_frame.set_name (controls_base_unselected_name);
 421
 422                 hide_selection ();
 423
 424                 /* children will be set for the yn=true case. but when deselecting
 425                    the editor only has a list of top-level trackviews, so we
 426                    have to do this here.
 427                 */
 428
 429                 for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 430                         (*i)->set_selected (false);
 431                 }
 432
 433
 434         }
 435 }
 436
 437 void
 438 TimeAxisView::build_size_menu ()
 439 {
 440         using namespace Menu_Helpers;
 441
 442         size_menu = new Menu;
 443         size_menu->set_name ("ArdourContextMenu");
 444         MenuList& items = size_menu->items();
 445
 446         items.push_back (MenuElem (_("Largest"), bind (mem_fun (*this, &TimeAxisView::set_height), Largest)));
 447         items.push_back (MenuElem (_("Large"), bind (mem_fun (*this, &TimeAxisView::set_height), Large)));
 448         items.push_back (MenuElem (_("Larger"), bind (mem_fun (*this, &TimeAxisView::set_height), Larger)));
 449         items.push_back (MenuElem (_("Normal"), bind (mem_fun (*this, &TimeAxisView::set_height), Normal)));
 450         items.push_back (MenuElem (_("Smaller"), bind (mem_fun (*this, &TimeAxisView::set_height), Smaller)));
 451         items.push_back (MenuElem (_("Small"), bind (mem_fun (*this, &TimeAxisView::set_height), Small)));
 452 }
 453
 454 void
 455 TimeAxisView::build_display_menu ()
 456 {
 457         using namespace Menu_Helpers;
 458
 459         display_menu = new Menu;
 460         display_menu->set_name ("ArdourContextMenu");
 461
 462         // Just let implementing classes define what goes into the manu
 463 }
 464
 465 void
 466 TimeAxisView::set_samples_per_unit (double spu)
 467 {
 468         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 469                 (*i)->set_samples_per_unit (spu);
 470         }
 471 }
 472
 473 void
 474 TimeAxisView::show_timestretch (jack_nframes_t start, jack_nframes_t end)
 475 {
 476         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 477                 (*i)->show_timestretch (start, end);
 478         }
 479 }
 480
 481 void
 482 TimeAxisView::hide_timestretch ()
 483 {
 484         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 485                 (*i)->hide_timestretch ();
 486         }
 487 }
 488
 489 void
 490 TimeAxisView::show_selection (TimeSelection& ts)
 491 {
 492         double x1;
 493         double x2;
 494         double y2;
 495         SelectionRect *rect;
 496
 497         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 498                 (*i)->show_selection (ts);
 499         }
 500
 501         if (GTK_OBJECT_FLAGS(GTK_OBJECT(selection_group)) & GNOME_CANVAS_ITEM_VISIBLE) {
 502                 while (!used_selection_rects.empty()) {
 503                         free_selection_rects.push_front (used_selection_rects.front());
 504                         used_selection_rects.pop_front();
 505                         gnome_canvas_item_hide (free_selection_rects.front()->rect);
 506                         gnome_canvas_item_hide (free_selection_rects.front()->start_trim);
 507                         gnome_canvas_item_hide (free_selection_rects.front()->end_trim);
 508                 }
 509                 gnome_canvas_item_hide (selection_group);
 510         }
 511
 512         gnome_canvas_item_show (selection_group);
 513         gnome_canvas_item_raise_to_top (selection_group);
 514
 515         for (list<AudioRange>::iterator i = ts.begin(); i != ts.end(); ++i) {
 516                 jack_nframes_t start, end, cnt;
 517
 518                 start = (*i).start;
 519                 end = (*i).end;
 520                 cnt = end - start + 1;
 521
 522                 rect = get_selection_rect ((*i).id);
 523
 524                 x1 = start / editor.get_current_zoom();
 525                 x2 = (start + cnt - 1) / editor.get_current_zoom();
 526                 y2 = height;
 527
 528                 gtk_object_set (GTK_OBJECT(rect->rect),
 529                                 "x1", x1,
 530                                 "y1", 1.0,
 531                                 "x2", x2,
 532                                 "y2", y2,
 533                                 NULL);
 534
 535                 // trim boxes are at the top for selections
 536
 537                 if (x2 > x1) {
 538                         gtk_object_set (GTK_OBJECT(rect->start_trim),
 539                                         "x1", x1,
 540                                         "y1", 1.0,
 541                                         "x2", x1 + trim_handle_size,
 542                                         "y2", 1.0 + trim_handle_size,
 543                                         NULL);
 544                         gtk_object_set (GTK_OBJECT(rect->end_trim),
 545                                         "x1", x2 - trim_handle_size,
 546                                         "y1", 1.0,
 547                                         "x2", x2,
 548                                         "y2", 1.0 + trim_handle_size,
 549                                         NULL);
 550                         gnome_canvas_item_show (rect->start_trim);
 551                         gnome_canvas_item_show (rect->end_trim);
 552                 } else {
 553                         gnome_canvas_item_hide (rect->start_trim);
 554                         gnome_canvas_item_hide (rect->end_trim);
 555                 }
 556
 557                 gnome_canvas_item_show (rect->rect);
 558                 used_selection_rects.push_back (rect);
 559         }
 560 }
 561
 562 void
 563 TimeAxisView::reshow_selection (TimeSelection& ts)
 564 {
 565         show_selection (ts);
 566
 567         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 568                 (*i)->show_selection (ts);
 569         }
 570 }
 571
 572 void
 573 TimeAxisView::hide_selection ()
 574 {
 575         if (GTK_OBJECT_FLAGS(GTK_OBJECT(selection_group)) & GNOME_CANVAS_ITEM_VISIBLE) {
 576                 while (!used_selection_rects.empty()) {
 577                         free_selection_rects.push_front (used_selection_rects.front());
 578                         used_selection_rects.pop_front();
 579                         gnome_canvas_item_hide (free_selection_rects.front()->rect);
 580                         gnome_canvas_item_hide (free_selection_rects.front()->start_trim);
 581                         gnome_canvas_item_hide (free_selection_rects.front()->end_trim);
 582                 }
 583                 gnome_canvas_item_hide (selection_group);
 584         }
 585
 586         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 587                 (*i)->hide_selection ();
 588         }
 589 }
 590
 591 void
 592 TimeAxisView::order_selection_trims (GnomeCanvasItem *item, bool put_start_on_top)
 593 {
 594         /* find the selection rect this is for. we have the item corresponding to one
 595            of the trim handles.
 596          */
 597
 598         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 599                 if ((*i)->start_trim == item || (*i)->end_trim == item) {
 600
 601                         /* make one trim handle be "above" the other so that if they overlap,
 602                            the top one is the one last used.
 603                         */
 604
 605                         gnome_canvas_item_raise_to_top ((*i)->rect);
 606                         gnome_canvas_item_raise_to_top (put_start_on_top ? (*i)->start_trim : (*i)->end_trim);
 607                         gnome_canvas_item_raise_to_top (put_start_on_top ? (*i)->end_trim : (*i)->start_trim);
 608
 609                         break;
 610                 }
 611         }
 612 }
 613
 614 SelectionRect *
 615 TimeAxisView::get_selection_rect (uint32_t id)
 616 {
 617         SelectionRect *rect;
 618
 619         /* check to see if we already have a visible rect for this particular selection ID */
 620
 621         for (list<SelectionRect*>::iterator i = used_selection_rects.begin(); i != used_selection_rects.end(); ++i) {
 622                 if ((*i)->id == id) {
 623                         return (*i);
 624                 }
 625         }
 626
 627         /* ditto for the free rect list */
 628
 629         for (list<SelectionRect*>::iterator i = free_selection_rects.begin(); i != free_selection_rects.end(); ++i) {
 630                 if ((*i)->id == id) {
 631                         free_selection_rects.erase (i);
 632                         return (*i);
 633                 }
 634         }
 635
 636         /* no existing matching rect, so go get a new one from the free list, or create one if there are none */
 637
 638         if (free_selection_rects.empty()) {
 639
 640                 rect = new SelectionRect;
 641
 642                 rect->rect = gnome_canvas_item_new (GNOME_CANVAS_GROUP(selection_group),
 643                                                   gnome_canvas_simplerect_get_type(),
 644                                                   "x1", 0.0,
 645                                                   "y1", 0.0,
 646                                                   "x2", 0.0,
 647                                                   "y2", 0.0,
 648                                                   "fill_color_rgba", color_map[cSelectionRectFill],
 649                                                   "outline_color_rgba" , color_map[cSelectionRectOutline],
 650                                                   NULL);
 651
 652
 653                 rect->start_trim = gnome_canvas_item_new (GNOME_CANVAS_GROUP(selection_group),
 654                                                             gnome_canvas_simplerect_get_type(),
 655                                                             "x1", (gdouble) 0.0,
 656                                                             "x2", (gdouble) 0.0,
 657                                                             "fill_color_rgba" , color_map[cSelectionStartFill],
 658                                                             "outline_color_rgba" , color_map[cSelectionStartOutline],
 659                                                             NULL);
 660
 661                 rect->end_trim = gnome_canvas_item_new (GNOME_CANVAS_GROUP(selection_group),
 662                                                           gnome_canvas_simplerect_get_type(),
 663                                                           "x1", 0.0,
 664                                                           "x2", 0.0,
 665                                                           "fill_color_rgba" , color_map[cSelectionEndFill],
 666                                                           "outline_color_rgba" , color_map[cSelectionEndOutline],
 667                                                           NULL);
 668                 free_selection_rects.push_front (rect);
 669
 670                 gtk_signal_connect (GTK_OBJECT(rect->rect), "event",
 671                                     (GtkSignalFunc) PublicEditor::canvas_selection_rect_event,
 672                                     &editor);
 673                 gtk_signal_connect (GTK_OBJECT(rect->start_trim), "event",
 674                                     (GtkSignalFunc) PublicEditor::canvas_selection_start_trim_event,
 675                                     &editor);
 676                 gtk_signal_connect (GTK_OBJECT(rect->end_trim), "event",
 677                                     (GtkSignalFunc) PublicEditor::canvas_selection_end_trim_event,
 678                                     &editor);
 679
 680                 gtk_object_set_data(GTK_OBJECT(rect->rect), "rect", rect);
 681                 gtk_object_set_data(GTK_OBJECT(rect->start_trim), "rect", rect);
 682                 gtk_object_set_data(GTK_OBJECT(rect->end_trim), "rect", rect);
 683         }
 684
 685         rect = free_selection_rects.front();
 686         rect->id = id;
 687         free_selection_rects.pop_front();
 688         return rect;
 689 }
 690
 691 bool
 692 TimeAxisView::is_child (TimeAxisView* tav)
 693 {
 694         return find (children.begin(), children.end(), tav) != children.end();
 695 }
 696
 697 void
 698 TimeAxisView::add_child (TimeAxisView* child)
 699 {
 700         children.push_back (child);
 701 }
 702
 703 void
 704 TimeAxisView::remove_child (TimeAxisView* child)
 705 {
 706         vector<TimeAxisView*>::iterator i;
 707
 708         if ((i = find (children.begin(), children.end(), child)) != children.end()) {
 709                 children.erase (i);
 710         }
 711 }
 712
 713 void
 714 TimeAxisView::get_selectables (jack_nframes_t start, jack_nframes_t end, double top, double bot, list<Selectable*>& result)
 715 {
 716         return;
 717 }
 718
 719 void
 720 TimeAxisView::get_inverted_selectables (Selection& sel, list<Selectable*>& result)
 721 {
 722         return;
 723 }
 724
 725 bool
 726 TimeAxisView::touched (double top, double bot)
 727 {
 728         /* remember: this is X Window - coordinate space starts in upper left and moves down.
 729            y_position is the "origin" or "top" of the track.
 730          */
 731
 732         double mybot = y_position + height; // XXX need to include Editor::track_spacing;
 733
 734         return ((y_position <= bot && y_position >= top) ||
 735                 ((mybot <= bot) && (top < mybot)) ||
 736                 (mybot >= bot && y_position < top));
 737 }
 738
 739 void
 740 TimeAxisView::set_parent (TimeAxisView& p)
 741 {
 742         parent = &p;
 743 }
 744
 745 bool
 746 TimeAxisView::has_state () const
 747 {
 748         return _has_state;
 749 }
 750
 751 TimeAxisView*
 752 TimeAxisView::get_parent_with_state ()
 753 {
 754         if (parent == 0) {
 755                 return 0;
 756         }
 757
 758         if (parent->has_state()) {
 759                 return parent;
 760         }
 761
 762         return parent->get_parent_with_state ();
 763 }
 764
 765 void
 766 TimeAxisView::set_state (const XMLNode& node)
 767 {
 768         const XMLProperty *prop;
 769
 770         if ((prop = node.property ("track_height")) != 0) {
 771
 772                 if (prop->value() == "largest") {
 773                         set_height (Largest);
 774                 } else if (prop->value() == "large") {
 775                         set_height (Large);
 776                 } else if (prop->value() == "larger") {
 777                         set_height (Larger);
 778                 } else if (prop->value() == "normal") {
 779                         set_height (Normal);
 780                 } else if (prop->value() == "smaller") {
 781                         set_height (Smaller);
 782                 } else if (prop->value() == "small") {
 783                         set_height (Small);
 784                 } else {
 785                         error << string_compose(_("unknown track height name \"%1\" in XML GUI information"), prop->value()) << endmsg;
 786                         set_height (Normal);
 787                 }
 788
 789         } else {
 790                 set_height (Normal);
 791         }
 792 }
 793
 794 void
 795 TimeAxisView::reset_height()
 796 {
 797         set_height ((TrackHeight) height);
 798
 799         for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
 800                 (*i)->set_height ((TrackHeight)(*i)->height);
 801         }
 802 }
 803