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