gtk2_ardour/panner2d.cc

   1 /*
   2     Copyright (C) 2002 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 <cmath>
  21 #include <climits>
  22 #include <string.h>
  23
  24 #include <cairo.h>
  25 #include <gtkmm/menu.h>
  26
  27 #include "gtkmm2ext/gtk_ui.h"
  28
  29 #include "pbd/error.h"
  30 #include "pbd/cartesian.h"
  31 #include "ardour/panner.h"
  32 #include "ardour/panner_shell.h"
  33 #include "ardour/pannable.h"
  34 #include "ardour/speakers.h"
  35
  36 #include "panner2d.h"
  37 #include "keyboard.h"
  38 #include "gui_thread.h"
  39 #include "utils.h"
  40 #include "public_editor.h"
  41
  42 #include "i18n.h"
  43
  44 using namespace std;
  45 using namespace Gtk;
  46 using namespace ARDOUR;
  47 using namespace PBD;
  48 using Gtkmm2ext::Keyboard;
  49
  50 static const int large_size_threshold = 100;
  51 static const int large_border_width = 25;
  52 static const int small_border_width = 8;
  53
  54 Panner2d::Target::Target (const AngularVector& a, const char *txt)
  55         : position (a)
  56         , text (txt)
  57         , _selected (false)
  58 {
  59 }
  60
  61 Panner2d::Target::~Target ()
  62 {
  63 }
  64
  65 void
  66 Panner2d::Target::set_text (const char* txt)
  67 {
  68         text = txt;
  69 }
  70
  71 Panner2d::Panner2d (boost::shared_ptr<PannerShell> p, int32_t h)
  72         : panner_shell (p)
  73         , position (AngularVector (0.0, 0.0), "")
  74         , width (0)
  75         , height (h)
  76         , last_width (0)
  77 {
  78         panner_shell->Changed.connect (connections, invalidator (*this), boost::bind (&Panner2d::handle_state_change, this), gui_context());
  79
  80         panner_shell->panner()->SignalPositionChanged.connect (panconnect, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
  81
  82         drag_target = 0;
  83         set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
  84
  85         handle_position_change ();
  86 }
  87
  88 Panner2d::~Panner2d()
  89 {
  90         for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
  91                 delete *i;
  92         }
  93 }
  94
  95 void
  96 Panner2d::reset (uint32_t n_inputs)
  97 {
  98         uint32_t nouts = panner_shell->panner()->out().n_audio();
  99
 100         /* signals */
 101
 102         while (signals.size() < n_inputs) {
 103                 add_signal ("", AngularVector());
 104         }
 105
 106         if (signals.size() > n_inputs) {
 107                 for (uint32_t i = signals.size(); i < n_inputs; ++i) {
 108                         delete signals[i];
 109                 }
 110
 111                 signals.resize (n_inputs);
 112         }
 113
 114         label_signals ();
 115
 116         for (uint32_t i = 0; i < n_inputs; ++i) {
 117                 signals[i]->position = panner_shell->panner()->signal_position (i);
 118         }
 119
 120         /* add all outputs */
 121
 122         while (speakers.size() < nouts) {
 123                 add_speaker (AngularVector());
 124         }
 125
 126         if (speakers.size() > nouts) {
 127                 for (uint32_t i = nouts; i < speakers.size(); ++i) {
 128                         delete speakers[i];
 129                 }
 130
 131                 speakers.resize (nouts);
 132         }
 133
 134         for (Targets::iterator x = speakers.begin(); x != speakers.end(); ++x) {
 135                 (*x)->visible = false;
 136         }
 137
 138         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 139
 140         for (uint32_t n = 0; n < nouts; ++n) {
 141                 char buf[16];
 142
 143                 snprintf (buf, sizeof (buf), "%d", n+1);
 144                 speakers[n]->set_text (buf);
 145                 speakers[n]->position = the_speakers[n].angles();
 146                 speakers[n]->visible = true;
 147         }
 148
 149         queue_draw ();
 150 }
 151
 152 void
 153 Panner2d::on_size_allocate (Gtk::Allocation& alloc)
 154 {
 155         width = alloc.get_width();
 156         height = alloc.get_height();
 157
 158         if (height > large_size_threshold) {
 159                 border = large_border_width;
 160         } else {
 161                 border = small_border_width;
 162         }
 163
 164         radius = min (width, height);
 165         radius -= border;
 166         radius /= 2;
 167
 168         hoffset = max ((double) (width - height), border);
 169         voffset = max ((double) (height - width), border);
 170
 171         hoffset /= 2.0;
 172         voffset /= 2.0;
 173
 174         DrawingArea::on_size_allocate (alloc);
 175 }
 176
 177 int
 178 Panner2d::add_signal (const char* text, const AngularVector& a)
 179 {
 180         Target* signal = new Target (a, text);
 181         signals.push_back (signal);
 182         signal->visible = true;
 183
 184         return 0;
 185 }
 186
 187 int
 188 Panner2d::add_speaker (const AngularVector& a)
 189 {
 190         Target* speaker = new Target (a, "");
 191         speakers.push_back (speaker);
 192         speaker->visible = true;
 193         queue_draw ();
 194
 195         return speakers.size() - 1;
 196 }
 197
 198 void
 199 Panner2d::handle_state_change ()
 200 {
 201         panconnect.drop_connections();
 202         panner_shell->panner()->SignalPositionChanged.connect (panconnect, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
 203         queue_draw ();
 204 }
 205
 206 void
 207 Panner2d::label_signals ()
 208 {
 209         uint32_t sz = signals.size();
 210
 211         switch (sz) {
 212         case 0:
 213                 break;
 214
 215         case 1:
 216                 signals[0]->set_text ("");
 217                 break;
 218
 219         case 2:
 220                 signals[0]->set_text ("L");
 221                 signals[1]->set_text ("R");
 222                 break;
 223
 224         default:
 225                 for (uint32_t i = 0; i < sz; ++i) {
 226                         char buf[64];
 227                         snprintf (buf, sizeof (buf), "%" PRIu32, i + 1);
 228                         signals[i]->set_text (buf);
 229                 }
 230                 break;
 231         }
 232 }
 233
 234 void
 235 Panner2d::handle_position_change ()
 236 {
 237         uint32_t n;
 238         double w = panner_shell->pannable()->pan_width_control->get_value();
 239
 240         position.position = AngularVector (panner_shell->pannable()->pan_azimuth_control->get_value() * 360.0,
 241                                            panner_shell->pannable()->pan_elevation_control->get_value() * 90.0);
 242
 243         for (uint32_t i = 0; i < signals.size(); ++i) {
 244                 signals[i]->position = panner_shell->panner()->signal_position (i);
 245         }
 246
 247         if (w * last_width <= 0) {
 248                 /* changed sign */
 249                 label_signals ();
 250         }
 251
 252         last_width = w;
 253
 254         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 255
 256         for (n = 0; n < speakers.size(); ++n) {
 257                 speakers[n]->position = the_speakers[n].angles();
 258         }
 259
 260         queue_draw ();
 261 }
 262
 263 void
 264 Panner2d::move_signal (int which, const AngularVector& a)
 265 {
 266         if (which >= int (speakers.size())) {
 267                 return;
 268         }
 269
 270         speakers[which]->position = a;
 271         queue_draw ();
 272 }
 273
 274 Panner2d::Target *
 275 Panner2d::find_closest_object (gdouble x, gdouble y, bool& is_signal)
 276 {
 277         Target *closest = 0;
 278         Target *candidate;
 279         float distance;
 280         float best_distance = FLT_MAX;
 281         CartesianVector c;
 282
 283         /* start with the position itself
 284          */
 285
 286         position.position.cartesian (c);
 287         cart_to_gtk (c);
 288         best_distance = sqrt ((c.x - x) * (c.x - x) +
 289                          (c.y - y) * (c.y - y));
 290         closest = &position;
 291
 292         for (Targets::const_iterator i = signals.begin(); i != signals.end(); ++i) {
 293                 candidate = *i;
 294
 295                 candidate->position.cartesian (c);
 296                 cart_to_gtk (c);
 297
 298                 distance = sqrt ((c.x - x) * (c.x - x) +
 299                                  (c.y - y) * (c.y - y));
 300
 301                 if (distance < best_distance) {
 302                         closest = candidate;
 303                         best_distance = distance;
 304                 }
 305         }
 306
 307         is_signal = true;
 308
 309         if (height > large_size_threshold) {
 310                 /* "big" */
 311                 if (best_distance > 30) { // arbitrary
 312                         closest = 0;
 313                 }
 314         } else {
 315                 /* "small" */
 316                 if (best_distance > 10) { // arbitrary
 317                         closest = 0;
 318                 }
 319         }
 320
 321         /* if we didn't find a signal close by, check the speakers */
 322
 323         if (!closest) {
 324                 for (Targets::const_iterator i = speakers.begin(); i != speakers.end(); ++i) {
 325                         candidate = *i;
 326
 327                         candidate->position.cartesian (c);
 328                         cart_to_gtk (c);
 329
 330                         distance = sqrt ((c.x - x) * (c.x - x) +
 331                                          (c.y - y) * (c.y - y));
 332
 333                         if (distance < best_distance) {
 334                                 closest = candidate;
 335                                 best_distance = distance;
 336                         }
 337                 }
 338
 339                 if (height > large_size_threshold) {
 340                         /* "big" */
 341                         if (best_distance < 30) { // arbitrary
 342                                 is_signal = false;
 343                         } else {
 344                                 closest = 0;
 345                         }
 346                 } else {
 347                         /* "small" */
 348                         if (best_distance < 10) { // arbitrary
 349                                 is_signal = false;
 350                         } else {
 351                                 closest = 0;
 352                         }
 353                 }
 354         }
 355
 356         return closest;
 357 }
 358
 359 bool
 360 Panner2d::on_motion_notify_event (GdkEventMotion *ev)
 361 {
 362         gint x, y;
 363         GdkModifierType state;
 364
 365         if (ev->is_hint) {
 366                 gdk_window_get_pointer (ev->window, &x, &y, &state);
 367         } else {
 368                 x = (int) floor (ev->x);
 369                 y = (int) floor (ev->y);
 370                 state = (GdkModifierType) ev->state;
 371         }
 372
 373         if (ev->state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) {
 374                 did_move = true;
 375         }
 376
 377         return handle_motion (x, y, state);
 378 }
 379
 380 bool
 381 Panner2d::on_expose_event (GdkEventExpose *event)
 382 {
 383         CartesianVector c;
 384         cairo_t* cr;
 385         bool small = (height <= large_size_threshold);
 386         const double diameter = radius*2.0;
 387
 388         cr = gdk_cairo_create (get_window()->gobj());
 389
 390         /* background */
 391
 392         cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height);
 393         if (!panner_shell->bypassed()) {
 394                 cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 1.0);
 395         } else {
 396                 cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 0.2);
 397         }
 398         cairo_fill_preserve (cr);
 399         cairo_clip (cr);
 400
 401         /* offset to give us some border */
 402
 403         cairo_translate (cr, hoffset, voffset);
 404
 405         cairo_set_line_width (cr, 1.0);
 406
 407         /* horizontal line of "crosshairs" */
 408
 409         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 410         cairo_move_to (cr, 0.0, radius);
 411         cairo_line_to (cr, diameter, radius);
 412         cairo_stroke (cr);
 413
 414         /* vertical line of "crosshairs" */
 415
 416         cairo_move_to (cr, radius, 0);
 417         cairo_line_to (cr, radius, diameter);
 418         cairo_stroke (cr);
 419
 420         /* the circle on which signals live */
 421
 422         cairo_set_line_width (cr, 2.0);
 423         cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, 1.0);
 424         cairo_arc (cr, radius, radius, radius, 0.0, 2.0 * M_PI);
 425         cairo_stroke (cr);
 426
 427         /* 3 other circles of smaller diameter circle on which signals live */
 428
 429         cairo_set_line_width (cr, 1.0);
 430         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 431         cairo_arc (cr, radius, radius, radius * 0.75, 0, 2.0 * M_PI);
 432         cairo_stroke (cr);
 433         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.85);
 434         cairo_arc (cr, radius, radius, radius * 0.50, 0, 2.0 * M_PI);
 435         cairo_stroke (cr);
 436         cairo_arc (cr, radius, radius, radius * 0.25, 0, 2.0 * M_PI);
 437         cairo_stroke (cr);
 438
 439         if (signals.size() > 1) {
 440                 /* arc to show "diffusion" */
 441
 442                 double width_angle = fabs (panner_shell->pannable()->pan_width_control->get_value()) * 2 * M_PI;
 443                 double position_angle = (2 * M_PI) - panner_shell->pannable()->pan_azimuth_control->get_value() * 2 * M_PI;
 444
 445                 cairo_save (cr);
 446                 cairo_translate (cr, radius, radius);
 447                 cairo_rotate (cr, position_angle - (width_angle/2.0));
 448                 cairo_move_to (cr, 0, 0);
 449                 cairo_arc_negative (cr, 0, 0, radius, width_angle, 0.0);
 450                 cairo_close_path (cr);
 451                 if (panner_shell->pannable()->pan_width_control->get_value() >= 0.0) {
 452                         /* normal width */
 453                         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.45);
 454                 } else {
 455                         /* inverse width */
 456                         cairo_set_source_rgba (cr, 1.0, 0.419, 0.419, 0.45);
 457                 }
 458                 cairo_fill (cr);
 459                 cairo_restore (cr);
 460         }
 461
 462         if (!panner_shell->bypassed()) {
 463
 464                 double arc_radius;
 465
 466                 cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 467
 468                 if (small) {
 469                         arc_radius = 4.0;
 470                 } else {
 471                         cairo_set_font_size (cr, 10);
 472                         arc_radius = 12.0;
 473                 }
 474
 475                 /* signals */
 476
 477                 if (signals.size() > 1) {
 478                         for (Targets::iterator i = signals.begin(); i != signals.end(); ++i) {
 479                                 Target* signal = *i;
 480
 481                                 if (signal->visible) {
 482
 483                                         signal->position.cartesian (c);
 484                                         cart_to_gtk (c);
 485
 486                                         cairo_new_path (cr);
 487                                         cairo_arc (cr, c.x, c.y, arc_radius, 0, 2.0 * M_PI);
 488                                         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.85);
 489                                         cairo_fill_preserve (cr);
 490                                         cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, 1.0);
 491                                         cairo_stroke (cr);
 492
 493                                         if (!small && !signal->text.empty()) {
 494                                                 cairo_set_source_rgb (cr, 0.517, 0.772, 0.882);
 495                                                 /* the +/- adjustments are a hack to try to center the text in the circle */
 496                                                 if (small) {
 497                                                         cairo_move_to (cr, c.x - 1, c.y + 1);
 498                                                 } else {
 499                                                         cairo_move_to (cr, c.x - 4, c.y + 4);
 500                                                 }
 501                                                 cairo_show_text (cr, signal->text.c_str());
 502                                         }
 503                                 }
 504                         }
 505                 }
 506
 507                 /* speakers */
 508
 509                 int n = 0;
 510
 511                 for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
 512                         Target *speaker = *i;
 513                         char buf[256];
 514                         ++n;
 515
 516                         if (speaker->visible) {
 517
 518                                 CartesianVector c;
 519
 520                                 speaker->position.cartesian (c);
 521                                 cart_to_gtk (c);
 522
 523                                 snprintf (buf, sizeof (buf), "%d", n);
 524
 525                                 /* stroke out a speaker shape */
 526
 527                                 cairo_move_to (cr, c.x, c.y);
 528                                 cairo_save (cr);
 529                                 cairo_rotate (cr, -(speaker->position.azi/360.0) * (2.0 * M_PI));
 530                                 if (small) {
 531                                         cairo_scale (cr, 0.8, 0.8);
 532                                 } else {
 533                                         cairo_scale (cr, 1.2, 1.2);
 534                                 }
 535                                 cairo_rel_line_to (cr, 4, -2);
 536                                 cairo_rel_line_to (cr, 0, -7);
 537                                 cairo_rel_line_to (cr, 5, +5);
 538                                 cairo_rel_line_to (cr, 5, 0);
 539                                 cairo_rel_line_to (cr, 0, 5);
 540                                 cairo_rel_line_to (cr, -5, 0);
 541                                 cairo_rel_line_to (cr, -5, +5);
 542                                 cairo_rel_line_to (cr, 0, -7);
 543                                 cairo_close_path (cr);
 544                                 cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 545                                 cairo_fill (cr);
 546                                 cairo_restore (cr);
 547
 548                                 if (!small) {
 549                                         cairo_set_font_size (cr, 16);
 550
 551                                         /* move the text in just a bit */
 552
 553                                         AngularVector textpos (speaker->position.azi, speaker->position.ele, 0.85);
 554                                         textpos.cartesian (c);
 555                                         cart_to_gtk (c);
 556                                         cairo_move_to (cr, c.x, c.y);
 557                                         cairo_show_text (cr, buf);
 558                                 }
 559
 560                         }
 561                 }
 562
 563                 /* draw position */
 564
 565                 position.position.cartesian (c);
 566                 cart_to_gtk (c);
 567
 568                 cairo_new_path (cr);
 569                 cairo_arc (cr, c.x, c.y, arc_radius, 0, 2.0 * M_PI);
 570                 cairo_set_source_rgba (cr, 1.0, 0.419, 0.419, 0.85);
 571                 cairo_fill_preserve (cr);
 572                 cairo_set_source_rgba (cr, 1.0, 0.905, 0.905, 0.85);
 573                 cairo_stroke (cr);
 574         }
 575
 576         cairo_destroy (cr);
 577
 578         return true;
 579 }
 580
 581 bool
 582 Panner2d::on_button_press_event (GdkEventButton *ev)
 583 {
 584         GdkModifierType state;
 585         int x;
 586         int y;
 587         bool is_signal;
 588
 589         if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
 590                 return false;
 591         }
 592
 593         did_move = false;
 594
 595         switch (ev->button) {
 596         case 1:
 597         case 2:
 598                 x = ev->x - border;
 599                 y = ev->y - border;
 600
 601                 if ((drag_target = find_closest_object (x, y, is_signal)) != 0) {
 602                         if (!is_signal) {
 603                                 panner_shell->panner()->set_position (drag_target->position.azi/360.0);
 604                                 drag_target = 0;
 605                         } else {
 606                                 drag_target->set_selected (true);
 607                         }
 608                 }
 609
 610                 drag_x = ev->x;
 611                 drag_y = ev->y;
 612                 state = (GdkModifierType) ev->state;
 613
 614                 return handle_motion (drag_x, drag_y, state);
 615                 break;
 616
 617         default:
 618                 break;
 619         }
 620
 621         return false;
 622 }
 623
 624 bool
 625 Panner2d::on_button_release_event (GdkEventButton *ev)
 626 {
 627         gint x, y;
 628         GdkModifierType state;
 629         bool ret = false;
 630
 631         switch (ev->button) {
 632         case 1:
 633                 x = (int) floor (ev->x);
 634                 y = (int) floor (ev->y);
 635                 state = (GdkModifierType) ev->state;
 636                 ret = handle_motion (x, y, state);
 637                 drag_target = 0;
 638                 break;
 639
 640         case 2:
 641                 x = (int) floor (ev->x);
 642                 y = (int) floor (ev->y);
 643                 state = (GdkModifierType) ev->state;
 644
 645                 if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
 646                         toggle_bypass ();
 647                         ret = true;
 648                 } else {
 649                         ret = handle_motion (x, y, state);
 650                 }
 651
 652                 drag_target = 0;
 653                 break;
 654
 655         case 3:
 656                 break;
 657
 658         }
 659
 660         return ret;
 661 }
 662
 663 gint
 664 Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
 665 {
 666         if (drag_target == 0) {
 667                 return false;
 668         }
 669
 670         if ((state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) == 0) {
 671                 return false;
 672         }
 673
 674
 675         if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
 676                 CartesianVector c;
 677                 bool need_move = false;
 678
 679                 drag_target->position.cartesian (c);
 680                 cart_to_gtk (c);
 681
 682                 if ((evx != c.x) || (evy != c.y)) {
 683                         need_move = true;
 684                 }
 685
 686                 if (need_move) {
 687                         set<Evoral::Parameter> params = panner_shell->panner()->what_can_be_automated();
 688                         set<Evoral::Parameter>::iterator p = params.find(PanElevationAutomation);
 689
 690                         double y0 = 4.0;
 691                         if (height > large_size_threshold) {
 692                                 y0 = 12.0;
 693                         }
 694                         CartesianVector cp (evx - 12.0, evy - y0, 0.0);
 695                         AngularVector av;
 696                         gtk_to_cart (cp);
 697
 698                         if (p == params.end()) {
 699                                 clamp_to_circle (cp.x, cp.y);
 700                                 cp.angular (av);
 701                                 if (drag_target == &position) {
 702                                         double degree_fract = av.azi / 360.0;
 703                                         panner_shell->panner()->set_position (degree_fract);
 704                                 }
 705                         } else {
 706                                 /* sphere projection */
 707                                 sphere_project (cp.x, cp.y, cp.z);
 708
 709                                 double r2d = 180.0 / M_PI;
 710                                 av.azi = r2d * atan2(cp.y, cp.x);
 711                                 av.ele = r2d * asin(cp.z);
 712
 713                                 if (drag_target == &position) {
 714                                         double azi_fract = av.azi / 360.0;
 715                                         double ele_fract = av.ele / 90.0;
 716                                         panner_shell->panner()->set_position (azi_fract);
 717                                         panner_shell->panner()->set_elevation (ele_fract);
 718                                 }
 719                         }
 720                 }
 721         }
 722
 723         return true;
 724 }
 725
 726 bool
 727 Panner2d::on_scroll_event (GdkEventScroll* ev)
 728 {
 729         switch (ev->direction) {
 730         case GDK_SCROLL_UP:
 731         case GDK_SCROLL_RIGHT:
 732                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() - 1.0/360.0);
 733                 break;
 734
 735         case GDK_SCROLL_DOWN:
 736         case GDK_SCROLL_LEFT:
 737                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() + 1.0/360.0);
 738                 break;
 739         }
 740         return true;
 741 }
 742
 743 void
 744 Panner2d::cart_to_gtk (CartesianVector& c) const
 745 {
 746         /* cartesian coordinate space:
 747               center = 0.0
 748               dimension = 2.0 * 2.0
 749               increasing y moves up
 750               so max values along each axis are -1..+1
 751
 752            GTK uses a coordinate space that is:
 753               top left = 0.0
 754               dimension = (radius*2.0) * (radius*2.0)
 755               increasing y moves down
 756         */
 757         const double diameter = radius*2.0;
 758
 759         c.x = diameter * ((c.x + 1.0) / 2.0);
 760         /* extra subtraction inverts the y-axis to match "increasing y moves down" */
 761         c.y = diameter - (diameter * ((c.y + 1.0) / 2.0));
 762 }
 763
 764 void
 765 Panner2d::gtk_to_cart (CartesianVector& c) const
 766 {
 767         const double diameter = radius*2.0;
 768         c.x = ((c.x / diameter) * 2.0) - 1.0;
 769         c.y = (((diameter - c.y) / diameter) * 2.0) - 1.0;
 770 }
 771
 772 void
 773 Panner2d::sphere_project (double& x, double& y, double& z)
 774 {
 775         double r, r2;
 776         r2 = x * x + y * y;
 777         if (r2 < 1.0) {
 778                 z = sqrt (1.0 - r2);
 779         } else {
 780                 r = sqrt (r2);
 781                 x = x / r;
 782                 y = y / r;
 783                 z = 0.0;
 784         }
 785 }
 786
 787 void
 788 Panner2d::clamp_to_circle (double& x, double& y)
 789 {
 790         double azi, ele;
 791         double z = 0.0;
 792         double l;
 793         PBD::cartesian_to_spherical (x, y, z, azi, ele, l);
 794         PBD::spherical_to_cartesian (azi, ele, 1.0, x, y, z);
 795 }
 796
 797 void
 798 Panner2d::toggle_bypass ()
 799 {
 800         panner_shell->set_bypassed (!panner_shell->bypassed());
 801 }
 802
 803 Panner2dWindow::Panner2dWindow (boost::shared_ptr<PannerShell> p, int32_t h, uint32_t inputs)
 804         : ArdourWindow (_("Panner (2D)"))
 805         , widget (p, h)
 806         , bypass_button (_("Bypass"))
 807 {
 808         widget.set_name ("MixerPanZone");
 809
 810         set_title (_("Panner"));
 811         widget.set_size_request (h, h);
 812
 813         bypass_button.signal_toggled().connect (sigc::mem_fun (*this, &Panner2dWindow::bypass_toggled));
 814
 815         button_box.set_spacing (6);
 816         button_box.pack_start (bypass_button, false, false);
 817
 818         spinner_box.set_spacing (6);
 819         left_side.set_spacing (6);
 820
 821         left_side.pack_start (button_box, false, false);
 822         left_side.pack_start (spinner_box, false, false);
 823
 824         bypass_button.show ();
 825         button_box.show ();
 826         spinner_box.show ();
 827         left_side.show ();
 828
 829         hpacker.set_spacing (6);
 830         hpacker.set_border_width (12);
 831         hpacker.pack_start (widget, false, false);
 832         hpacker.pack_start (left_side, false, false);
 833         hpacker.show ();
 834
 835         add (hpacker);
 836         reset (inputs);
 837         widget.show ();
 838 }
 839
 840 void
 841 Panner2dWindow::reset (uint32_t n_inputs)
 842 {
 843         widget.reset (n_inputs);
 844
 845 #if 0
 846         while (spinners.size() < n_inputs) {
 847                 // spinners.push_back (new Gtk::SpinButton (widget.azimuth (spinners.size())));
 848                 //spinner_box.pack_start (*spinners.back(), false, false);
 849                 //spinners.back()->set_digits (4);
 850                 spinners.back()->show ();
 851         }
 852
 853         while (spinners.size() > n_inputs) {
 854                 spinner_box.remove (*spinners.back());
 855                 delete spinners.back();
 856                 spinners.erase (--spinners.end());
 857         }
 858 #endif
 859 }
 860
 861 void
 862 Panner2dWindow::bypass_toggled ()
 863 {
 864         bool view = bypass_button.get_active ();
 865         bool model = widget.get_panner_shell()->bypassed ();
 866
 867         if (model != view) {
 868                 widget.get_panner_shell()->set_bypassed (view);
 869         }
 870 }
 871
 872 bool
 873 Panner2dWindow::on_key_press_event (GdkEventKey* event)
 874 {
 875         return relay_key_press (event, &PublicEditor::instance());
 876 }
 877
 878 bool
 879 Panner2dWindow::on_key_release_event (GdkEventKey*)
 880 {
 881         return true;
 882 }