gtk2_ardour/time_axis_view_item.cc

   1 /*
   2     Copyright (C) 2003 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 <pbd/error.h>
  21 #include <pbd/stacktrace.h>
  22
  23 #include <ardour/types.h>
  24 #include <ardour/ardour.h>
  25
  26 #include <gtkmm2ext/utils.h>
  27
  28 #include "public_editor.h"
  29 #include "time_axis_view_item.h"
  30 #include "time_axis_view.h"
  31 #include "simplerect.h"
  32 #include "utils.h"
  33 #include "canvas_impl.h"
  34 #include "rgb_macros.h"
  35 #include "ardour_ui.h"
  36
  37 #include "i18n.h"
  38
  39 using namespace std;
  40 using namespace Editing;
  41 using namespace Glib;
  42 using namespace PBD;
  43
  44 //------------------------------------------------------------------------------
  45 /** Initialize const static memeber data */
  46
  47 Pango::FontDescription* TimeAxisViewItem::NAME_FONT = 0;
  48 bool TimeAxisViewItem::have_name_font = false;
  49 const double TimeAxisViewItem::NAME_X_OFFSET = 15.0;
  50 const double TimeAxisViewItem::GRAB_HANDLE_LENGTH = 6 ;
  51
  52 double TimeAxisViewItem::NAME_Y_OFFSET;
  53 double TimeAxisViewItem::NAME_HIGHLIGHT_SIZE;
  54 double TimeAxisViewItem::NAME_HIGHLIGHT_THRESH;
  55
  56
  57 //---------------------------------------------------------------------------------------//
  58 // Constructor / Desctructor
  59
  60 /**
  61  * Constructs a new TimeAxisViewItem.
  62  *
  63  * @param it_name the unique name/Id of this item
  64  * @param parant the parent canvas group
  65  * @param tv the TimeAxisView we are going to be added to
  66  * @param spu samples per unit
  67  * @param base_color
  68  * @param start the start point of this item
  69  * @param duration the duration of this item
  70  */
  71 TimeAxisViewItem::TimeAxisViewItem(const string & it_name, ArdourCanvas::Group& parent, TimeAxisView& tv, double spu, Gdk::Color& base_color,
  72                                    nframes_t start, nframes_t duration, bool recording,
  73                                    Visibility vis)
  74         : trackview (tv), _recregion(recording)
  75 {
  76         if (!have_name_font) {
  77
  78                 /* first constructed item sets up font info */
  79
  80                 NAME_FONT = get_font_for_style (N_("TimeAxisViewItemName"));
  81
  82                 Gtk::Window win;
  83                 Gtk::Label foo;
  84                 win.add (foo);
  85
  86                 Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout (X_("Hg")); /* ascender + descender */
  87                 int width;
  88                 int height;
  89
  90                 layout->set_font_description (*NAME_FONT);
  91                 Gtkmm2ext::get_ink_pixel_size (layout, width, height);
  92
  93                 NAME_Y_OFFSET = height + 6;
  94                 NAME_HIGHLIGHT_SIZE = height + 6;
  95                 NAME_HIGHLIGHT_THRESH = NAME_HIGHLIGHT_SIZE * 2;
  96
  97                 have_name_font = true;
  98         }
  99
 100         group = new ArdourCanvas::Group (parent);
 101
 102         init (it_name, spu, base_color, start, duration, vis);
 103
 104 }
 105
 106 TimeAxisViewItem::TimeAxisViewItem (const TimeAxisViewItem& other)
 107         : trackview (other.trackview)
 108 {
 109
 110         Gdk::Color c;
 111         int r,g,b,a;
 112
 113         UINT_TO_RGBA (other.fill_color, &r, &g, &b, &a);
 114         c.set_rgb_p (r/255.0, g/255.0, b/255.0);
 115
 116         /* share the other's parent, but still create a new group */
 117
 118         Gnome::Canvas::Group* parent = other.group->property_parent();
 119
 120         group = new ArdourCanvas::Group (*parent);
 121
 122         init (other.item_name, other.samples_per_unit, c, other.frame_position, other.item_duration, other.visibility);
 123 }
 124
 125
 126 void
 127 TimeAxisViewItem::init (const string& it_name, double spu, Gdk::Color& base_color, nframes_t start, nframes_t duration, Visibility vis)
 128 {
 129         item_name = it_name ;
 130         name_text_width = ::pixel_width (it_name, *NAME_FONT);
 131         last_name_text_width = 0;
 132         samples_per_unit = spu ;
 133         should_show_selection = true;
 134         frame_position = start ;
 135         item_duration = duration ;
 136         name_connected = false;
 137         fill_opacity = 0;
 138         position_locked = false ;
 139         max_item_duration = ARDOUR::max_frames;
 140         min_item_duration = 0 ;
 141         show_vestigial = true;
 142         visibility = vis;
 143         _sensitive = true;
 144
 145         if (duration == 0) {
 146                 warning << "Time Axis Item Duration == 0" << endl ;
 147         }
 148
 149         vestigial_frame = new ArdourCanvas::SimpleRect (*group);
 150         vestigial_frame->property_x1() = (double) 0.0;
 151         vestigial_frame->property_y1() = (double) 1.0;
 152         vestigial_frame->property_x2() = (double) 2.0;
 153         vestigial_frame->property_y2() = (double) trackview.current_height();
 154         vestigial_frame->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_VestigialFrame.get();
 155         vestigial_frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_VestigialFrame.get();
 156         vestigial_frame->hide ();
 157
 158         if (visibility & ShowFrame) {
 159                 frame = new ArdourCanvas::SimpleRect (*group);
 160                 frame->property_x1() = (double) 0.0;
 161                 frame->property_y1() = (double) 1.0;
 162                 frame->property_x2() = (double) trackview.editor.frame_to_pixel(duration);
 163                 frame->property_y2() = (double) trackview.current_height();
 164                 frame->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_TimeAxisFrame.get();
 165
 166                 /* by default draw all 4 edges */
 167
 168                 uint32_t outline_what = 0x1|0x2|0x4|0x8;
 169
 170                 if (visibility & HideFrameLeft) {
 171                         outline_what &= ~(0x1);
 172                 }
 173
 174                 if (visibility & HideFrameRight) {
 175                         outline_what &= ~(0x2);
 176                 }
 177
 178                 if (visibility & HideFrameTB) {
 179                         outline_what &= ~(0x4 | 0x8);
 180                 }
 181
 182                 frame->property_outline_what() = outline_what;
 183
 184         } else {
 185                 frame = 0;
 186         }
 187
 188         if (visibility & ShowNameHighlight) {
 189                 name_highlight = new ArdourCanvas::SimpleRect (*group);
 190                 if (visibility & FullWidthNameHighlight) {
 191                         name_highlight->property_x1() = (double) 0.0;
 192                         name_highlight->property_x2() = (double) (trackview.editor.frame_to_pixel(item_duration));
 193                 } else {
 194                         name_highlight->property_x1() = (double) 1.0;
 195                         name_highlight->property_x2() = (double) (trackview.editor.frame_to_pixel(item_duration)) - 1;
 196                 }
 197                 name_highlight->property_y1() = (double) (trackview.current_height() - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE);
 198                 name_highlight->property_y2() = (double) (trackview.current_height() - 1);
 199
 200                 name_highlight->set_data ("timeaxisviewitem", this);
 201
 202         } else {
 203                 name_highlight = 0;
 204         }
 205
 206         /* create our grab handles used for trimming/duration etc */
 207
 208         if (visibility & ShowHandles) {
 209                 frame_handle_start = new ArdourCanvas::SimpleRect (*group);
 210                 frame_handle_start->property_x1() = (double) 0.0;
 211                 frame_handle_start->property_x2() = (double) TimeAxisViewItem::GRAB_HANDLE_LENGTH;
 212                 frame_handle_start->property_y1() = (double) 1.0;
 213                 frame_handle_start->property_y2() = (double) TimeAxisViewItem::GRAB_HANDLE_LENGTH+1;
 214                 frame_handle_start->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_FrameHandle.get();
 215
 216                 frame_handle_end = new ArdourCanvas::SimpleRect (*group);
 217                 frame_handle_end->property_x1() = (double) (trackview.editor.frame_to_pixel(get_duration())) - (TimeAxisViewItem::GRAB_HANDLE_LENGTH);
 218                 frame_handle_end->property_x2() = (double) trackview.editor.frame_to_pixel(get_duration());
 219                 frame_handle_end->property_y1() = (double) 1;
 220                 frame_handle_end->property_y2() = (double) TimeAxisViewItem::GRAB_HANDLE_LENGTH + 1;
 221                 frame_handle_end->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_FrameHandle.get();
 222
 223         } else {
 224                 frame_handle_start = 0;
 225                 frame_handle_end = 0;
 226         }
 227
 228         if (visibility & ShowNameText) {
 229                 name_text = new ArdourCanvas::Text (*group);
 230                 name_text->property_x() = (double) TimeAxisViewItem::NAME_X_OFFSET;
 231                 /* trackview.current_height() is the bottom of the trackview. subtract 1 to get back to the bottom of the highlight,
 232                    then NAME_Y_OFFSET to position the text in the vertical center of the highlight
 233                 */
 234                 name_text->property_y() = (double) trackview.current_height() - 1.0 - TimeAxisViewItem::NAME_Y_OFFSET;
 235                 name_text->property_font_desc() = *NAME_FONT;
 236                 name_text->property_anchor() = Gtk::ANCHOR_NW;
 237
 238                 name_text->set_data ("timeaxisviewitem", this);
 239
 240         } else {
 241                 name_text = 0;
 242         }
 243
 244         set_color (base_color) ;
 245
 246         set_duration (item_duration, this) ;
 247         set_position (start, this) ;
 248 }
 249
 250 /**
 251  * Destructor
 252  */
 253 TimeAxisViewItem::~TimeAxisViewItem()
 254 {
 255         delete group;
 256 }
 257
 258
 259 //---------------------------------------------------------------------------------------//
 260 // Position and duration Accessors/Mutators
 261
 262 /**
 263  * Set the position of this item upon the timeline to the specified value
 264  *
 265  * @param pos the new position
 266  * @param src the identity of the object that initiated the change
 267  * @return true if the position change was a success, false otherwise
 268  */
 269 bool
 270 TimeAxisViewItem::set_position(nframes_t pos, void* src, double* delta)
 271 {
 272         if (position_locked) {
 273                 return false;
 274         }
 275
 276         frame_position = pos;
 277
 278         /*  This sucks. The GnomeCanvas version I am using
 279             doesn't correctly implement gnome_canvas_group_set_arg(),
 280             so that simply setting the "x" arg of the group
 281             fails to move the group. Instead, we have to
 282             use gnome_canvas_item_move(), which does the right
 283             thing. I see that in GNOME CVS, the current (Sept 2001)
 284             version of GNOME Canvas rectifies this issue cleanly.
 285         */
 286
 287         double old_unit_pos ;
 288         double new_unit_pos = pos / samples_per_unit ;
 289
 290         old_unit_pos = group->property_x();
 291
 292         if (new_unit_pos != old_unit_pos) {
 293                 group->move (new_unit_pos - old_unit_pos, 0.0);
 294         }
 295
 296         if (delta) {
 297                 (*delta) = new_unit_pos - old_unit_pos;
 298         }
 299
 300         PositionChanged (frame_position, src) ; /* EMIT_SIGNAL */
 301
 302         return true;
 303 }
 304
 305 /**
 306  * Return the position of this item upon the timeline
 307  *
 308  * @return the position of this item
 309  */
 310 nframes_t
 311 TimeAxisViewItem::get_position() const
 312 {
 313         return frame_position;
 314 }
 315
 316 /**
 317  * Sets the duration of this item
 318  *
 319  * @param dur the new duration of this item
 320  * @param src the identity of the object that initiated the change
 321  * @return true if the duration change was succesful, false otherwise
 322  */
 323 bool
 324 TimeAxisViewItem::set_duration (nframes_t dur, void* src)
 325 {
 326         if ((dur > max_item_duration) || (dur < min_item_duration)) {
 327                 warning << string_compose (_("new duration %1 frames is out of bounds for %2"), get_item_name(), dur)
 328                         << endmsg;
 329                 return false;
 330         }
 331
 332         if (dur == 0) {
 333                 group->hide();
 334         }
 335
 336         item_duration = dur;
 337
 338         reset_width_dependent_items (trackview.editor.frame_to_pixel (dur));
 339
 340         DurationChanged (dur, src) ; /* EMIT_SIGNAL */
 341         return true;
 342 }
 343
 344 /**
 345  * Returns the duration of this item
 346  *
 347  */
 348 nframes_t
 349 TimeAxisViewItem::get_duration() const
 350 {
 351         return (item_duration);
 352 }
 353
 354 /**
 355  * Sets the maximum duration that this item make have.
 356  *
 357  * @param dur the new maximum duration
 358  * @param src the identity of the object that initiated the change
 359  */
 360 void
 361 TimeAxisViewItem::set_max_duration(nframes_t dur, void* src)
 362 {
 363         max_item_duration = dur ;
 364         MaxDurationChanged(max_item_duration, src) ; /* EMIT_SIGNAL */
 365 }
 366
 367 /**
 368  * Returns the maxmimum duration that this item may be set to
 369  *
 370  * @return the maximum duration that this item may be set to
 371  */
 372 nframes_t
 373 TimeAxisViewItem::get_max_duration() const
 374 {
 375         return (max_item_duration) ;
 376 }
 377
 378 /**
 379  * Sets the minimu duration that this item may be set to
 380  *
 381  * @param the minimum duration that this item may be set to
 382  * @param src the identity of the object that initiated the change
 383  */
 384 void
 385 TimeAxisViewItem::set_min_duration(nframes_t dur, void* src)
 386 {
 387         min_item_duration = dur ;
 388         MinDurationChanged(max_item_duration, src) ; /* EMIT_SIGNAL */
 389 }
 390
 391 /**
 392  * Returns the minimum duration that this item mey be set to
 393  *
 394  * @return the nimum duration that this item mey be set to
 395  */
 396 nframes_t
 397 TimeAxisViewItem::get_min_duration() const
 398 {
 399         return(min_item_duration) ;
 400 }
 401
 402 /**
 403  * Sets whether the position of this Item is locked to its current position
 404  * Locked items cannot be moved until the item is unlocked again.
 405  *
 406  * @param yn set to true to lock this item to its current position
 407  * @param src the identity of the object that initiated the change
 408  */
 409 void
 410 TimeAxisViewItem::set_position_locked(bool yn, void* src)
 411 {
 412         position_locked = yn ;
 413         set_trim_handle_colors() ;
 414         PositionLockChanged (position_locked, src); /* EMIT_SIGNAL */
 415 }
 416
 417 /**
 418  * Returns whether this item is locked to its current position
 419  *
 420  * @return true if this item is locked to its current posotion
 421  *         false otherwise
 422  */
 423 bool
 424 TimeAxisViewItem::get_position_locked() const
 425 {
 426         return (position_locked);
 427 }
 428
 429 /**
 430  * Sets whether the Maximum Duration constraint is active and should be enforced
 431  *
 432  * @param active set true to enforce the max duration constraint
 433  * @param src the identity of the object that initiated the change
 434  */
 435 void
 436 TimeAxisViewItem::set_max_duration_active(bool active, void* src)
 437 {
 438         max_duration_active = active ;
 439 }
 440
 441 /**
 442  * Returns whether the Maximum Duration constraint is active and should be enforced
 443  *
 444  * @return true if the maximum duration constraint is active, false otherwise
 445  */
 446 bool
 447 TimeAxisViewItem::get_max_duration_active() const
 448 {
 449         return(max_duration_active) ;
 450 }
 451
 452 /**
 453  * Sets whether the Minimum Duration constraint is active and should be enforced
 454  *
 455  * @param active set true to enforce the min duration constraint
 456  * @param src the identity of the object that initiated the change
 457  */
 458 void
 459 TimeAxisViewItem::set_min_duration_active(bool active, void* src)
 460 {
 461         min_duration_active = active ;
 462 }
 463
 464 /**
 465  * Returns whether the Maximum Duration constraint is active and should be enforced
 466  *
 467  * @return true if the maximum duration constraint is active, false otherwise
 468  */
 469 bool
 470 TimeAxisViewItem::get_min_duration_active() const
 471 {
 472         return(min_duration_active) ;
 473 }
 474
 475 //---------------------------------------------------------------------------------------//
 476 // Name/Id Accessors/Mutators
 477
 478 /**
 479  * Set the name/Id of this item.
 480  *
 481  * @param new_name the new name of this item
 482  * @param src the identity of the object that initiated the change
 483  */
 484 void
 485 TimeAxisViewItem::set_item_name(std::string new_name, void* src)
 486 {
 487         if (new_name != item_name) {
 488                 std::string temp_name = item_name ;
 489                 item_name = new_name ;
 490                 name_text_width = ::pixel_width (new_name, *NAME_FONT);
 491                 NameChanged (item_name, temp_name, src) ; /* EMIT_SIGNAL */
 492         }
 493 }
 494
 495 /**
 496  * Returns the name/id of this item
 497  *
 498  * @return the name/id of this item
 499  */
 500 std::string
 501 TimeAxisViewItem::get_item_name() const
 502 {
 503         return(item_name) ;
 504 }
 505
 506 //---------------------------------------------------------------------------------------//
 507 // Selection Methods
 508
 509 /**
 510  * Set to true to indicate that this item is currently selected
 511  *
 512  * @param yn true if this item is currently selected
 513  * @param src the identity of the object that initiated the change
 514  */
 515 void
 516 TimeAxisViewItem::set_selected(bool yn)
 517 {
 518         if (_selected != yn) {
 519                 Selectable::set_selected (yn);
 520                 set_frame_color ();
 521         }
 522 }
 523
 524 void
 525 TimeAxisViewItem::set_should_show_selection (bool yn)
 526 {
 527         if (should_show_selection != yn) {
 528                 should_show_selection = yn;
 529                 set_frame_color ();
 530         }
 531 }
 532
 533 //---------------------------------------------------------------------------------------//
 534 // Parent Componenet Methods
 535
 536 /**
 537  * Returns the TimeAxisView that this item is upon
 538  *
 539  * @return the timeAxisView that this item is placed upon
 540  */
 541 TimeAxisView&
 542 TimeAxisViewItem::get_time_axis_view()
 543 {
 544         return trackview;
 545 }
 546 //---------------------------------------------------------------------------------------//
 547 // ui methods & data
 548
 549 /**
 550  * Sets the displayed item text
 551  * This item is the visual text name displayed on the canvas item, this can be different to the name of the item
 552  *
 553  * @param new_name the new name text to display
 554  */
 555 void
 556 TimeAxisViewItem::set_name_text(const ustring& new_name)
 557 {
 558         if (name_text) {
 559                 name_text->property_text() = new_name;
 560                 name_text_width = pixel_width (new_name, *NAME_FONT);
 561                 name_text_size_cache.clear ();
 562         }
 563 }
 564
 565 /**
 566  * Set the height of this item
 567  *
 568  * @param h the new height
 569  */
 570 void
 571 TimeAxisViewItem::set_height (double height)
 572 {
 573         if (name_highlight) {
 574                 if (height < NAME_HIGHLIGHT_THRESH) {
 575                         name_highlight->hide();
 576                         if (name_text) {
 577                                 name_text->hide();
 578                         }
 579                 } else {
 580                         name_highlight->show();
 581                         if (name_text) {
 582                                 name_text->show();
 583                         }
 584                 }
 585
 586                 if (height > NAME_HIGHLIGHT_SIZE) {
 587                         name_highlight->property_y1() = (double) height+1 - NAME_HIGHLIGHT_SIZE;
 588                         name_highlight->property_y2() = (double) height;
 589                 } else {
 590                         /* it gets hidden now anyway */
 591                         //name_highlight->property_y1() = (double) 1.0;
 592                         //name_highlight->property_y2() = (double) height;
 593                 }
 594         }
 595
 596         if (name_text) {
 597                 name_text->property_y() = height+1 - NAME_Y_OFFSET;
 598                 if (height < NAME_HIGHLIGHT_THRESH) {
 599                         name_text->property_fill_color_rgba() =  fill_color;
 600                 } else {
 601                         name_text->property_fill_color_rgba() = label_color;
 602                 }
 603         }
 604
 605         if (frame) {
 606                 frame->property_y2() = height+1;
 607         }
 608
 609         vestigial_frame->property_y2() = height+1;
 610 }
 611
 612 /**
 613  *
 614  */
 615 void
 616 TimeAxisViewItem::set_color(Gdk::Color& base_color)
 617 {
 618         compute_colors (base_color);
 619         set_colors ();
 620 }
 621
 622 /**
 623  *
 624  */
 625 ArdourCanvas::Item*
 626 TimeAxisViewItem::get_canvas_frame()
 627 {
 628         return(frame) ;
 629 }
 630
 631 /**
 632  *
 633  */
 634 ArdourCanvas::Group*
 635 TimeAxisViewItem::get_canvas_group()
 636 {
 637         return (group) ;
 638 }
 639
 640 /**
 641  *
 642  */
 643 ArdourCanvas::Item*
 644 TimeAxisViewItem::get_name_highlight()
 645 {
 646         return (name_highlight) ;
 647 }
 648
 649 /**
 650  *
 651  */
 652 ArdourCanvas::Text*
 653 TimeAxisViewItem::get_name_text()
 654 {
 655         return (name_text) ;
 656 }
 657
 658 /**
 659  * Calculates some contrasting color for displaying various parts of this item, based upon the base color
 660  *
 661  * @param color the base color of the item
 662  */
 663 void
 664 TimeAxisViewItem::compute_colors(Gdk::Color& base_color)
 665 {
 666         unsigned char radius ;
 667         char minor_shift ;
 668
 669         unsigned char r,g,b ;
 670
 671         /* FILL: this is simple */
 672         r = base_color.get_red()/256 ;
 673         g = base_color.get_green()/256 ;
 674         b = base_color.get_blue()/256 ;
 675         fill_color = RGBA_TO_UINT(r,g,b,255) ;
 676
 677         /*  for minor colors:
 678                 if the overall saturation is strong, make the minor colors light.
 679                 if its weak, make them dark.
 680
 681                 we do this by moving an equal distance to the other side of the
 682                 central circle in the color wheel from where we started.
 683         */
 684
 685         radius = (unsigned char) rint (floor (sqrt (static_cast<double>(r*r + g*g + b+b))/3.0f)) ;
 686         minor_shift = 125 - radius ;
 687
 688         /* LABEL: rotate around color wheel by 120 degrees anti-clockwise */
 689
 690         r = base_color.get_red()/256;
 691         g = base_color.get_green()/256;
 692         b = base_color.get_blue()/256;
 693
 694         if (r > b)
 695         {
 696                 if (r > g)
 697                 {
 698                         /* red sector => green */
 699                         swap (r,g);
 700                 }
 701                 else
 702                 {
 703                         /* green sector => blue */
 704                         swap (g,b);
 705                 }
 706         }
 707         else
 708         {
 709                 if (b > g)
 710                 {
 711                         /* blue sector => red */
 712                         swap (b,r);
 713                 }
 714                 else
 715                 {
 716                         /* green sector => blue */
 717                         swap (g,b);
 718                 }
 719         }
 720
 721         r += minor_shift;
 722         b += minor_shift;
 723         g += minor_shift;
 724
 725         label_color = RGBA_TO_UINT(r,g,b,255);
 726         r = (base_color.get_red()/256)   + 127 ;
 727         g = (base_color.get_green()/256) + 127 ;
 728         b = (base_color.get_blue()/256)  + 127 ;
 729
 730         label_color = RGBA_TO_UINT(r,g,b,255);
 731
 732         /* XXX can we do better than this ? */
 733         /* We're trying ;) */
 734         /* NUKECOLORS */
 735
 736         //frame_color_r = 192;
 737         //frame_color_g = 192;
 738         //frame_color_b = 194;
 739
 740         //selected_frame_color_r = 182;
 741         //selected_frame_color_g = 145;
 742         //selected_frame_color_b = 168;
 743
 744         //handle_color_r = 25 ;
 745         //handle_color_g = 0 ;
 746         //handle_color_b = 255 ;
 747         //lock_handle_color_r = 235 ;
 748         //lock_handle_color_g = 16;
 749         //lock_handle_color_b = 16;
 750 }
 751
 752 /**
 753  * Convenience method to set the various canvas item colors
 754  */
 755 void
 756 TimeAxisViewItem::set_colors()
 757 {
 758         set_frame_color() ;
 759         if (name_text) {
 760                 double height = NAME_HIGHLIGHT_THRESH;
 761
 762                 if (frame) {
 763                         height = frame->property_y2();
 764                 }
 765
 766                 if (height < NAME_HIGHLIGHT_THRESH) {
 767                         name_text->property_fill_color_rgba() =  fill_color;
 768                 }
 769                 else {
 770                         name_text->property_fill_color_rgba() = label_color;
 771                 }
 772         }
 773
 774         if (name_highlight) {
 775                 name_highlight->property_fill_color_rgba() = fill_color;
 776                 name_highlight->property_outline_color_rgba() = fill_color;
 777         }
 778         set_trim_handle_colors() ;
 779 }
 780
 781 /**
 782  * Sets the frame color depending on whether this item is selected
 783  */
 784 void
 785 TimeAxisViewItem::set_frame_color()
 786 {
 787         if (frame) {
 788                 uint32_t r,g,b,a;
 789
 790                 if (_selected && should_show_selection) {
 791                         UINT_TO_RGBA(ARDOUR_UI::config()->canvasvar_SelectedFrameBase.get(), &r, &g, &b, &a);
 792                         frame->property_fill_color_rgba() = RGBA_TO_UINT(r, g, b, fill_opacity ? fill_opacity : a);// Lets still use the theme's opacity value if Opaque is not set
 793                 } else {
 794                         if (_recregion) {
 795                                 UINT_TO_RGBA(ARDOUR_UI::config()->canvasvar_RecordingRect.get(), &r, &g, &b, &a);
 796                                 frame->property_fill_color_rgba() = RGBA_TO_UINT(r, g, b, a);
 797                         } else {
 798                                 UINT_TO_RGBA(ARDOUR_UI::config()->canvasvar_FrameBase.get(), &r, &g, &b, &a);
 799                                 frame->property_fill_color_rgba() = RGBA_TO_UINT(r, g, b, fill_opacity ? fill_opacity : a);
 800                         }
 801                 }
 802         }
 803 }
 804
 805 /**
 806  * Sets the colors of the start and end trim handle depending on object state
 807  *
 808  */
 809 void
 810 TimeAxisViewItem::set_trim_handle_colors()
 811 {
 812         if (frame_handle_start) {
 813                 if (position_locked) {
 814                         frame_handle_start->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TrimHandleLocked.get();
 815                         frame_handle_end->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TrimHandleLocked.get();
 816                 } else {
 817                         frame_handle_start->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TrimHandle.get();
 818                         frame_handle_end->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_TrimHandle.get();
 819                 }
 820         }
 821 }
 822
 823 double
 824 TimeAxisViewItem::get_samples_per_unit()
 825 {
 826         return(samples_per_unit) ;
 827 }
 828
 829 void
 830 TimeAxisViewItem::set_samples_per_unit (double spu)
 831 {
 832         samples_per_unit = spu ;
 833         set_position (this->get_position(), this);
 834         reset_width_dependent_items ((double)get_duration() / samples_per_unit);
 835 }
 836
 837 void
 838 TimeAxisViewItem::reset_width_dependent_items (double pixel_width)
 839 {
 840         if (pixel_width < 2.0) {
 841
 842                 if (show_vestigial) {
 843                         vestigial_frame->show();
 844                 }
 845
 846                 if (name_highlight) {
 847                         name_highlight->hide();
 848                         if (name_text) {
 849                                 name_text->hide();
 850                         }
 851                 }
 852
 853                 if (frame) {
 854                         frame->hide();
 855                 }
 856
 857                 if (frame_handle_start) {
 858                         frame_handle_start->hide();
 859                         frame_handle_end->hide();
 860                 }
 861
 862         } else {
 863                 vestigial_frame->hide();
 864
 865                 if (name_highlight) {
 866
 867                         double height = name_highlight->property_y2 ();
 868
 869                         if (height < NAME_HIGHLIGHT_THRESH) {
 870                                 name_highlight->hide();
 871                                 if (name_text) {
 872                                         name_text->hide();
 873                                 }
 874                         } else {
 875                                 name_highlight->show();
 876                                 if (name_text && !get_item_name().empty()) {
 877                                         name_text->show();
 878                                         reset_name_width (pixel_width);
 879                                 }
 880                         }
 881
 882                         if (visibility & FullWidthNameHighlight) {
 883                                 name_highlight->property_x2() = pixel_width;
 884                         } else {
 885                                 name_highlight->property_x2() = pixel_width - 1.0;
 886                         }
 887
 888                 }
 889
 890                 if (frame) {
 891                         frame->show();
 892                         frame->property_x2() = pixel_width;
 893                 }
 894
 895                 if (frame_handle_start) {
 896                         if (pixel_width < (2*TimeAxisViewItem::GRAB_HANDLE_LENGTH)) {
 897                                 frame_handle_start->hide();
 898                                 frame_handle_end->hide();
 899                         } else {
 900                                 frame_handle_start->show();
 901                                 frame_handle_end->property_x1() = pixel_width - (TimeAxisViewItem::GRAB_HANDLE_LENGTH);
 902                                 frame_handle_end->property_x2() = pixel_width;
 903                                 frame_handle_end->show();
 904                         }
 905                 }
 906         }
 907 }
 908
 909 void
 910 TimeAxisViewItem::reset_name_width (double pixel_width)
 911 {
 912         if (name_text == 0) {
 913                 return;
 914         }
 915
 916         int limit = (int) floor (pixel_width - NAME_X_OFFSET);
 917         bool shrinking = (last_name_text_width > pixel_width);
 918         int actual_width;
 919         ustring ustr;
 920         ustring::size_type n;
 921
 922         if ((last_name_text_width &&                                       // we did this once
 923              shrinking &&                                                  // we're getting smaller
 924              (name_text_width <= limit) &&                                 // fits the new size
 925              (name_text_width <= last_name_text_width - NAME_X_OFFSET))) { // fit into the old size too
 926                 last_name_text_width = pixel_width;
 927                 return;
 928         }
 929
 930         /* now check the cache of existing truncations */
 931
 932         Gtk::Label foo;
 933         Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
 934
 935         for (n = item_name.length(); n > 0; --n) {
 936
 937                 map<ustring::size_type,int>::iterator i;
 938
 939                 if ((i = name_text_size_cache.find (n)) != name_text_size_cache.end()) {
 940
 941                         /* we know the length of this substring already */
 942
 943                         if ((actual_width = (*i).second) < limit) {
 944
 945                                 /* it fits, use it */
 946
 947                                 ustr = item_name.substr (0, n);
 948                                 break;
 949                         }
 950
 951                 } else {
 952
 953                         /* we don't know the length of this substring already, so compute
 954                            it and put it into the cache.
 955                          */
 956
 957                         layout->set_text (item_name.substr (0, n));
 958
 959                         int width, height;
 960                         Gtkmm2ext::get_ink_pixel_size (layout, width, height);
 961
 962                         name_text_size_cache[n] = width;
 963
 964                         if ((actual_width = width) < limit) {
 965                                 ustr = item_name.substr (0, n);
 966                                 break;
 967                         }
 968                 }
 969         }
 970
 971         if (n == 0) {
 972                 name_text->property_text() = "";
 973                 last_name_text_width = pixel_width;
 974                 return;
 975         }
 976
 977         /* don't use name for event handling if it leaves no room
 978            for trimming to work.
 979         */
 980
 981         if (pixel_width - actual_width < (NAME_X_OFFSET * 2.0)) {
 982                 if (name_connected) {
 983                         name_connected = false;
 984                 }
 985         } else {
 986                 if (!name_connected) {
 987                         name_connected = true;
 988                 }
 989         }
 990
 991         name_text->property_text() = ustr;
 992         name_text_width = actual_width;
 993         name_text->show();
 994         last_name_text_width = pixel_width;
 995
 996 }
 997
 998
 999 //---------------------------------------------------------------------------------------//
1000 // Handle time axis removal
1001
1002 /**
1003  * Handles the Removal of this time axis item
1004  * This _needs_ to be called to alert others of the removal properly, ie where the source
1005  * of the removal came from.
1006  *
1007  * XXX Although im not too happy about this method of doing things, I cant think of a cleaner method
1008  *     just now to capture the source of the removal
1009  *
1010  * @param src the identity of the object that initiated the change
1011  */
1012 void
1013 TimeAxisViewItem::remove_this_item(void* src)
1014 {
1015         /*
1016            defer to idle loop, otherwise we'll delete this object
1017            while we're still inside this function ...
1018         */
1019         Glib::signal_idle().connect(bind (sigc::ptr_fun (&TimeAxisViewItem::idle_remove_this_item), this, src));
1020 }
1021
1022 /**
1023  * Callback used to remove this time axis item during the gtk idle loop
1024  * This is used to avoid deleting the obejct while inside the remove_this_item
1025  * method
1026  *
1027  * @param item the TimeAxisViewItem to remove
1028  * @param src the identity of the object that initiated the change
1029  */
1030 gint
1031 TimeAxisViewItem::idle_remove_this_item(TimeAxisViewItem* item, void* src)
1032 {
1033         item->ItemRemoved (item->get_item_name(), src) ; /* EMIT_SIGNAL */
1034         delete item;
1035         item = 0;
1036         return false;
1037 }
1038