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         , have_elevation (false)
  78 {
  79         panner_shell->Changed.connect (connections, invalidator (*this), boost::bind (&Panner2d::handle_state_change, this), gui_context());
  80
  81         panner_shell->panner()->SignalPositionChanged.connect (panconnect, 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_state_change ();
  87         handle_position_change ();
  88 }
  89
  90 Panner2d::~Panner2d()
  91 {
  92         for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
  93                 delete *i;
  94         }
  95 }
  96
  97 void
  98 Panner2d::reset (uint32_t n_inputs)
  99 {
 100         uint32_t nouts = panner_shell->panner()->out().n_audio();
 101
 102         /* signals */
 103
 104         while (signals.size() < n_inputs) {
 105                 add_signal ("", AngularVector());
 106         }
 107
 108         if (signals.size() > n_inputs) {
 109                 for (uint32_t i = signals.size(); i < n_inputs; ++i) {
 110                         delete signals[i];
 111                 }
 112
 113                 signals.resize (n_inputs);
 114         }
 115
 116         label_signals ();
 117
 118         for (uint32_t i = 0; i < n_inputs; ++i) {
 119                 signals[i]->position = panner_shell->panner()->signal_position (i);
 120         }
 121
 122         /* add all outputs */
 123
 124         while (speakers.size() < nouts) {
 125                 add_speaker (AngularVector());
 126         }
 127
 128         if (speakers.size() > nouts) {
 129                 for (uint32_t i = nouts; i < speakers.size(); ++i) {
 130                         delete speakers[i];
 131                 }
 132
 133                 speakers.resize (nouts);
 134         }
 135
 136         for (Targets::iterator x = speakers.begin(); x != speakers.end(); ++x) {
 137                 (*x)->visible = false;
 138         }
 139
 140         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 141
 142         for (uint32_t n = 0; n < nouts; ++n) {
 143                 char buf[16];
 144
 145                 snprintf (buf, sizeof (buf), "%d", n+1);
 146                 speakers[n]->set_text (buf);
 147                 speakers[n]->position = the_speakers[n].angles();
 148                 speakers[n]->visible = true;
 149         }
 150
 151         queue_draw ();
 152 }
 153
 154 void
 155 Panner2d::on_size_allocate (Gtk::Allocation& alloc)
 156 {
 157         width = alloc.get_width();
 158         height = alloc.get_height();
 159
 160         if (height > large_size_threshold) {
 161                 border = large_border_width;
 162         } else {
 163                 border = small_border_width;
 164         }
 165
 166         radius = min (width, height);
 167         radius -= border;
 168         radius /= 2;
 169
 170         hoffset = max ((double) (width - height), border);
 171         voffset = max ((double) (height - width), border);
 172
 173         hoffset /= 2.0;
 174         voffset /= 2.0;
 175
 176         DrawingArea::on_size_allocate (alloc);
 177 }
 178
 179 int
 180 Panner2d::add_signal (const char* text, const AngularVector& a)
 181 {
 182         Target* signal = new Target (a, text);
 183         signals.push_back (signal);
 184         signal->visible = true;
 185
 186         return 0;
 187 }
 188
 189 int
 190 Panner2d::add_speaker (const AngularVector& a)
 191 {
 192         Target* speaker = new Target (a, "");
 193         speakers.push_back (speaker);
 194         speaker->visible = true;
 195         queue_draw ();
 196
 197         return speakers.size() - 1;
 198 }
 199
 200 void
 201 Panner2d::handle_state_change ()
 202 {
 203         panconnect.drop_connections();
 204         panner_shell->panner()->SignalPositionChanged.connect (panconnect, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
 205
 206         set<Evoral::Parameter> params = panner_shell->panner()->what_can_be_automated();
 207         set<Evoral::Parameter>::iterator p = params.find(PanElevationAutomation);
 208         bool elev = have_elevation;
 209         have_elevation = (p == params.end()) ? false : true;
 210         if (elev != have_elevation) {
 211                 handle_position_change();
 212         }
 213         queue_draw ();
 214 }
 215
 216 void
 217 Panner2d::label_signals ()
 218 {
 219         uint32_t sz = signals.size();
 220
 221         switch (sz) {
 222         case 0:
 223                 break;
 224
 225         case 1:
 226                 signals[0]->set_text ("");
 227                 break;
 228
 229         case 2:
 230                 signals[0]->set_text (_("L"));
 231                 signals[1]->set_text (_("R"));
 232                 break;
 233
 234         default:
 235                 for (uint32_t i = 0; i < sz; ++i) {
 236                         char buf[64];
 237                         snprintf (buf, sizeof (buf), "%" PRIu32, i + 1);
 238                         signals[i]->set_text (buf);
 239                 }
 240                 break;
 241         }
 242 }
 243
 244 void
 245 Panner2d::handle_position_change ()
 246 {
 247         uint32_t n;
 248         double w = panner_shell->pannable()->pan_width_control->get_value();
 249
 250         if (have_elevation) {
 251                 position.position = AngularVector (panner_shell->pannable()->pan_azimuth_control->get_value() * 360.0,
 252                                                    panner_shell->pannable()->pan_elevation_control->get_value() * 90.0);
 253         } else {
 254                 position.position = AngularVector (panner_shell->pannable()->pan_azimuth_control->get_value() * 360.0, 0);
 255         }
 256
 257         for (uint32_t i = 0; i < signals.size(); ++i) {
 258                 signals[i]->position = panner_shell->panner()->signal_position (i);
 259         }
 260
 261         if (w * last_width <= 0) {
 262                 /* changed sign */
 263                 label_signals ();
 264         }
 265
 266         last_width = w;
 267
 268         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 269
 270         for (n = 0; n < speakers.size(); ++n) {
 271                 speakers[n]->position = the_speakers[n].angles();
 272         }
 273
 274         queue_draw ();
 275 }
 276
 277 void
 278 Panner2d::move_signal (int which, const AngularVector& a)
 279 {
 280         if (which >= int (speakers.size())) {
 281                 return;
 282         }
 283
 284         speakers[which]->position = a;
 285         queue_draw ();
 286 }
 287
 288 Panner2d::Target *
 289 Panner2d::find_closest_object (gdouble x, gdouble y, bool& is_signal)
 290 {
 291         Target *closest = 0;
 292         Target *candidate;
 293         float distance;
 294         float best_distance = FLT_MAX;
 295         CartesianVector c;
 296
 297         /* start with the position itself
 298          */
 299
 300         position.position.cartesian (c);
 301         cart_to_gtk (c);
 302         best_distance = sqrt ((c.x - x) * (c.x - x) +
 303                          (c.y - y) * (c.y - y));
 304         closest = &position;
 305
 306         for (Targets::const_iterator i = signals.begin(); i != signals.end(); ++i) {
 307                 candidate = *i;
 308
 309                 candidate->position.cartesian (c);
 310                 cart_to_gtk (c);
 311
 312                 distance = sqrt ((c.x - x) * (c.x - x) +
 313                                  (c.y - y) * (c.y - y));
 314
 315                 if (distance < best_distance) {
 316                         closest = candidate;
 317                         best_distance = distance;
 318                 }
 319         }
 320
 321         is_signal = true;
 322
 323         if (height > large_size_threshold) {
 324                 /* "big" */
 325                 if (best_distance > 30) { // arbitrary
 326                         closest = 0;
 327                 }
 328         } else {
 329                 /* "small" */
 330                 if (best_distance > 10) { // arbitrary
 331                         closest = 0;
 332                 }
 333         }
 334
 335         /* if we didn't find a signal close by, check the speakers */
 336
 337         if (!closest) {
 338                 for (Targets::const_iterator i = speakers.begin(); i != speakers.end(); ++i) {
 339                         candidate = *i;
 340
 341                         candidate->position.cartesian (c);
 342                         cart_to_gtk (c);
 343
 344                         distance = sqrt ((c.x - x) * (c.x - x) +
 345                                          (c.y - y) * (c.y - y));
 346
 347                         if (distance < best_distance) {
 348                                 closest = candidate;
 349                                 best_distance = distance;
 350                         }
 351                 }
 352
 353                 if (height > large_size_threshold) {
 354                         /* "big" */
 355                         if (best_distance < 30) { // arbitrary
 356                                 is_signal = false;
 357                         } else {
 358                                 closest = 0;
 359                         }
 360                 } else {
 361                         /* "small" */
 362                         if (best_distance < 10) { // arbitrary
 363                                 is_signal = false;
 364                         } else {
 365                                 closest = 0;
 366                         }
 367                 }
 368         }
 369
 370         return closest;
 371 }
 372
 373 bool
 374 Panner2d::on_motion_notify_event (GdkEventMotion *ev)
 375 {
 376         gint x, y;
 377         GdkModifierType state;
 378
 379         if (ev->is_hint) {
 380                 gdk_window_get_pointer (ev->window, &x, &y, &state);
 381         } else {
 382                 x = (int) floor (ev->x);
 383                 y = (int) floor (ev->y);
 384                 state = (GdkModifierType) ev->state;
 385         }
 386
 387         if (ev->state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) {
 388                 did_move = true;
 389         }
 390
 391         return handle_motion (x, y, state);
 392 }
 393
 394 bool
 395 Panner2d::on_expose_event (GdkEventExpose *event)
 396 {
 397         CartesianVector c;
 398         cairo_t* cr;
 399         bool small = (height <= large_size_threshold);
 400         const double diameter = radius*2.0;
 401
 402         cr = gdk_cairo_create (get_window()->gobj());
 403
 404         /* background */
 405
 406         cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height);
 407         if (!panner_shell->bypassed()) {
 408                 cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 1.0);
 409         } else {
 410                 cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 0.2);
 411         }
 412         cairo_fill_preserve (cr);
 413         cairo_clip (cr);
 414
 415         /* offset to give us some border */
 416
 417         cairo_translate (cr, hoffset, voffset);
 418
 419         cairo_set_line_width (cr, 1.0);
 420
 421         /* horizontal line of "crosshairs" */
 422
 423         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 424         cairo_move_to (cr, 0.0, radius);
 425         cairo_line_to (cr, diameter, radius);
 426         cairo_stroke (cr);
 427
 428         /* vertical line of "crosshairs" */
 429
 430         cairo_move_to (cr, radius, 0);
 431         cairo_line_to (cr, radius, diameter);
 432         cairo_stroke (cr);
 433
 434         /* the circle on which signals live */
 435
 436         cairo_set_line_width (cr, 2.0);
 437         cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, 1.0);
 438         cairo_arc (cr, radius, radius, radius, 0.0, 2.0 * M_PI);
 439         cairo_stroke (cr);
 440
 441         /* 3 other circles of smaller diameter circle on which signals live */
 442
 443         cairo_set_line_width (cr, 1.0);
 444         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 445         cairo_arc (cr, radius, radius, radius * 0.75, 0, 2.0 * M_PI);
 446         cairo_stroke (cr);
 447         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.85);
 448         cairo_arc (cr, radius, radius, radius * 0.50, 0, 2.0 * M_PI);
 449         cairo_stroke (cr);
 450         cairo_arc (cr, radius, radius, radius * 0.25, 0, 2.0 * M_PI);
 451         cairo_stroke (cr);
 452
 453         if (signals.size() > 1) {
 454                 /* arc to show "diffusion" */
 455
 456                 double width_angle = fabs (panner_shell->pannable()->pan_width_control->get_value()) * 2 * M_PI;
 457                 double position_angle = (2 * M_PI) - panner_shell->pannable()->pan_azimuth_control->get_value() * 2 * M_PI;
 458
 459                 cairo_save (cr);
 460                 cairo_translate (cr, radius, radius);
 461                 cairo_rotate (cr, position_angle - (width_angle/2.0));
 462                 cairo_move_to (cr, 0, 0);
 463                 cairo_arc_negative (cr, 0, 0, radius, width_angle, 0.0);
 464                 cairo_close_path (cr);
 465                 if (panner_shell->pannable()->pan_width_control->get_value() >= 0.0) {
 466                         /* normal width */
 467                         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.45);
 468                 } else {
 469                         /* inverse width */
 470                         cairo_set_source_rgba (cr, 1.0, 0.419, 0.419, 0.45);
 471                 }
 472                 cairo_fill (cr);
 473                 cairo_restore (cr);
 474         }
 475
 476         if (!panner_shell->bypassed()) {
 477
 478                 double arc_radius;
 479
 480                 cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 481
 482                 if (small) {
 483                         arc_radius = 4.0;
 484                 } else {
 485                         cairo_set_font_size (cr, 10);
 486                         arc_radius = 12.0;
 487                 }
 488
 489                 /* signals */
 490
 491                 if (signals.size() > 1) {
 492                         for (Targets::iterator i = signals.begin(); i != signals.end(); ++i) {
 493                                 Target* signal = *i;
 494
 495                                 if (signal->visible) {
 496
 497                                         PBD::AngularVector sp = signal->position;
 498                                         if (!have_elevation) sp.ele = 0;
 499                                         sp.cartesian (c);
 500                                         cart_to_gtk (c);
 501
 502                                         cairo_new_path (cr);
 503                                         cairo_arc (cr, c.x, c.y, arc_radius, 0, 2.0 * M_PI);
 504                                         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.85);
 505                                         cairo_fill_preserve (cr);
 506                                         cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, 1.0);
 507                                         cairo_stroke (cr);
 508
 509                                         if (!small && !signal->text.empty()) {
 510                                                 cairo_set_source_rgb (cr, 0.517, 0.772, 0.882);
 511                                                 /* the +/- adjustments are a hack to try to center the text in the circle */
 512                                                 if (small) {
 513                                                         cairo_move_to (cr, c.x - 1, c.y + 1);
 514                                                 } else {
 515                                                         cairo_move_to (cr, c.x - 4, c.y + 4);
 516                                                 }
 517                                                 cairo_show_text (cr, signal->text.c_str());
 518                                         }
 519                                 }
 520                         }
 521                 }
 522
 523                 /* speakers */
 524
 525                 int n = 0;
 526
 527                 for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
 528                         Target *speaker = *i;
 529                         char buf[256];
 530                         ++n;
 531
 532                         if (speaker->visible) {
 533
 534                                 CartesianVector c;
 535
 536                                 speaker->position.cartesian (c);
 537                                 cart_to_gtk (c);
 538
 539                                 snprintf (buf, sizeof (buf), "%d", n);
 540
 541                                 /* stroke out a speaker shape */
 542
 543                                 cairo_move_to (cr, c.x, c.y);
 544                                 cairo_save (cr);
 545                                 cairo_rotate (cr, -(speaker->position.azi/360.0) * (2.0 * M_PI));
 546                                 if (small) {
 547                                         cairo_scale (cr, 0.8, 0.8);
 548                                 } else {
 549                                         cairo_scale (cr, 1.2, 1.2);
 550                                 }
 551                                 cairo_rel_line_to (cr, 4, -2);
 552                                 cairo_rel_line_to (cr, 0, -7);
 553                                 cairo_rel_line_to (cr, 5, +5);
 554                                 cairo_rel_line_to (cr, 5, 0);
 555                                 cairo_rel_line_to (cr, 0, 5);
 556                                 cairo_rel_line_to (cr, -5, 0);
 557                                 cairo_rel_line_to (cr, -5, +5);
 558                                 cairo_rel_line_to (cr, 0, -7);
 559                                 cairo_close_path (cr);
 560                                 cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 561                                 cairo_fill (cr);
 562                                 cairo_restore (cr);
 563
 564                                 if (!small) {
 565                                         cairo_set_font_size (cr, 16);
 566
 567                                         /* move the text in just a bit */
 568
 569                                         AngularVector textpos (speaker->position.azi, speaker->position.ele, 0.85);
 570                                         textpos.cartesian (c);
 571                                         cart_to_gtk (c);
 572                                         cairo_move_to (cr, c.x, c.y);
 573                                         cairo_show_text (cr, buf);
 574                                 }
 575
 576                         }
 577                 }
 578
 579                 /* draw position */
 580
 581                 position.position.cartesian (c);
 582                 cart_to_gtk (c);
 583
 584                 cairo_new_path (cr);
 585                 cairo_arc (cr, c.x, c.y, arc_radius, 0, 2.0 * M_PI);
 586                 cairo_set_source_rgba (cr, 1.0, 0.419, 0.419, 0.85);
 587                 cairo_fill_preserve (cr);
 588                 cairo_set_source_rgba (cr, 1.0, 0.905, 0.905, 0.85);
 589                 cairo_stroke (cr);
 590         }
 591
 592         cairo_destroy (cr);
 593
 594         return true;
 595 }
 596
 597 bool
 598 Panner2d::on_button_press_event (GdkEventButton *ev)
 599 {
 600         GdkModifierType state;
 601         int x;
 602         int y;
 603         bool is_signal;
 604
 605         if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
 606                 return false;
 607         }
 608
 609         did_move = false;
 610
 611         switch (ev->button) {
 612         case 1:
 613         case 2:
 614                 x = ev->x - hoffset;
 615                 y = ev->y - voffset;
 616
 617                 if ((drag_target = find_closest_object (x, y, is_signal)) != 0) {
 618                         if (!is_signal) {
 619                                 panner_shell->panner()->set_position (drag_target->position.azi/360.0);
 620                                 drag_target = 0;
 621                         } else {
 622                                 drag_target->set_selected (true);
 623                         }
 624                 }
 625
 626                 state = (GdkModifierType) ev->state;
 627                 return handle_motion (ev->x, ev->y, state);
 628                 break;
 629
 630         default:
 631                 break;
 632         }
 633
 634         return false;
 635 }
 636
 637 bool
 638 Panner2d::on_button_release_event (GdkEventButton *ev)
 639 {
 640         gint x, y;
 641         GdkModifierType state;
 642         bool ret = false;
 643
 644         switch (ev->button) {
 645         case 1:
 646                 x = (int) floor (ev->x);
 647                 y = (int) floor (ev->y);
 648                 state = (GdkModifierType) ev->state;
 649                 ret = handle_motion (x, y, state);
 650                 drag_target = 0;
 651                 break;
 652
 653         case 2:
 654                 x = (int) floor (ev->x);
 655                 y = (int) floor (ev->y);
 656                 state = (GdkModifierType) ev->state;
 657
 658                 if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
 659                         toggle_bypass ();
 660                         ret = true;
 661                 } else {
 662                         ret = handle_motion (x, y, state);
 663                 }
 664
 665                 drag_target = 0;
 666                 break;
 667
 668         case 3:
 669                 break;
 670
 671         }
 672
 673         return ret;
 674 }
 675
 676 gint
 677 Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
 678 {
 679         if (drag_target == 0) {
 680                 return false;
 681         }
 682
 683         if ((state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) == 0) {
 684                 return false;
 685         }
 686
 687         evx -= hoffset;
 688         evy -= voffset;
 689
 690         if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
 691                 CartesianVector c;
 692                 bool need_move = false;
 693
 694                 drag_target->position.cartesian (c);
 695                 cart_to_gtk (c);
 696
 697                 if ((evx != c.x) || (evy != c.y)) {
 698                         need_move = true;
 699                 }
 700
 701                 if (need_move) {
 702                         CartesianVector cp (evx, evy, 0.0);
 703                         AngularVector av;
 704                         gtk_to_cart (cp);
 705
 706                         if (!have_elevation) {
 707                                 clamp_to_circle (cp.x, cp.y);
 708                                 cp.angular (av);
 709                                 if (drag_target == &position) {
 710                                         double degree_fract = av.azi / 360.0;
 711                                         panner_shell->panner()->set_position (degree_fract);
 712                                 }
 713                         } else {
 714                                 /* sphere projection */
 715                                 sphere_project (cp.x, cp.y, cp.z);
 716
 717                                 double r2d = 180.0 / M_PI;
 718                                 av.azi = r2d * atan2(cp.y, cp.x);
 719                                 av.ele = r2d * asin(cp.z);
 720
 721                                 if (drag_target == &position) {
 722                                         double azi_fract = av.azi / 360.0;
 723                                         double ele_fract = av.ele / 90.0;
 724                                         panner_shell->panner()->set_position (azi_fract);
 725                                         panner_shell->panner()->set_elevation (ele_fract);
 726                                 }
 727                         }
 728                 }
 729         }
 730
 731         return true;
 732 }
 733
 734 bool
 735 Panner2d::on_scroll_event (GdkEventScroll* ev)
 736 {
 737         switch (ev->direction) {
 738         case GDK_SCROLL_UP:
 739         case GDK_SCROLL_RIGHT:
 740                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() - 1.0/360.0);
 741                 break;
 742
 743         case GDK_SCROLL_DOWN:
 744         case GDK_SCROLL_LEFT:
 745                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() + 1.0/360.0);
 746                 break;
 747         }
 748         return true;
 749 }
 750
 751 void
 752 Panner2d::cart_to_gtk (CartesianVector& c) const
 753 {
 754         /* cartesian coordinate space:
 755               center = 0.0
 756               dimension = 2.0 * 2.0
 757               increasing y moves up
 758               so max values along each axis are -1..+1
 759
 760            GTK uses a coordinate space that is:
 761               top left = 0.0
 762               dimension = (radius*2.0) * (radius*2.0)
 763               increasing y moves down
 764         */
 765         const double diameter = radius*2.0;
 766
 767         c.x = diameter * ((c.x + 1.0) / 2.0);
 768         /* extra subtraction inverts the y-axis to match "increasing y moves down" */
 769         c.y = diameter - (diameter * ((c.y + 1.0) / 2.0));
 770 }
 771
 772 void
 773 Panner2d::gtk_to_cart (CartesianVector& c) const
 774 {
 775         const double diameter = radius*2.0;
 776         c.x = ((c.x / diameter) * 2.0) - 1.0;
 777         c.y = (((diameter - c.y) / diameter) * 2.0) - 1.0;
 778 }
 779
 780 void
 781 Panner2d::sphere_project (double& x, double& y, double& z)
 782 {
 783         double r, r2;
 784         r2 = x * x + y * y;
 785         if (r2 < 1.0) {
 786                 z = sqrt (1.0 - r2);
 787         } else {
 788                 r = sqrt (r2);
 789                 x = x / r;
 790                 y = y / r;
 791                 z = 0.0;
 792         }
 793 }
 794
 795 void
 796 Panner2d::clamp_to_circle (double& x, double& y)
 797 {
 798         double azi, ele;
 799         double z = 0.0;
 800         double l;
 801         PBD::cartesian_to_spherical (x, y, z, azi, ele, l);
 802         PBD::spherical_to_cartesian (azi, ele, 1.0, x, y, z);
 803 }
 804
 805 void
 806 Panner2d::toggle_bypass ()
 807 {
 808         panner_shell->set_bypassed (!panner_shell->bypassed());
 809 }
 810
 811 Panner2dWindow::Panner2dWindow (boost::shared_ptr<PannerShell> p, int32_t h, uint32_t inputs)
 812         : ArdourWindow (_("Panner (2D)"))
 813         , widget (p, h)
 814         , bypass_button (_("Bypass"))
 815         , width_adjustment (0, -100, 100, 1, 5, 0)
 816         , width_spinner (width_adjustment)
 817 {
 818         widget.set_name ("MixerPanZone");
 819
 820         set_title (_("Panner"));
 821         widget.set_size_request (h, h);
 822
 823         bypass_button.signal_toggled().connect (sigc::mem_fun (*this, &Panner2dWindow::bypass_toggled));
 824         width_spinner.signal_changed().connect (sigc::mem_fun (*this, &Panner2dWindow::width_changed));
 825
 826         p->pannable()->pan_width_control->Changed.connect (connections, invalidator(*this), boost::bind (&Panner2dWindow::set_width, this), gui_context());
 827         p->Changed.connect (connections, invalidator (*this), boost::bind (&Panner2dWindow::set_bypassed, this), gui_context());
 828
 829         button_box.set_spacing (6);
 830         button_box.pack_start (bypass_button, false, false);
 831
 832         left_side.set_spacing (6);
 833
 834         left_side.pack_start (button_box, false, false);
 835
 836         Gtk::Label* l = manage (new Label (
 837                                 p->panner()->describe_parameter(PanWidthAutomation),
 838                                 Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false));
 839         spinner_box.pack_start (*l, false, false);
 840         spinner_box.pack_start (width_spinner, false, false);
 841         left_side.pack_start (spinner_box, false, false);
 842
 843         l->show ();
 844         bypass_button.show ();
 845         button_box.show ();
 846         width_spinner.show ();
 847         spinner_box.show ();
 848         left_side.show ();
 849
 850         hpacker.set_spacing (6);
 851         hpacker.set_border_width (12);
 852         hpacker.pack_start (widget, false, false);
 853         hpacker.pack_start (left_side, false, false);
 854         hpacker.show ();
 855
 856         add (hpacker);
 857         reset (inputs);
 858         set_width();
 859         set_bypassed();
 860         widget.show ();
 861 }
 862
 863 void
 864 Panner2dWindow::reset (uint32_t n_inputs)
 865 {
 866         widget.reset (n_inputs);
 867 }
 868
 869 void
 870 Panner2dWindow::bypass_toggled ()
 871 {
 872         bool view = bypass_button.get_active ();
 873         bool model = widget.get_panner_shell()->bypassed ();
 874
 875         if (model != view) {
 876                 widget.get_panner_shell()->set_bypassed (view);
 877         }
 878 }
 879 void
 880 Panner2dWindow::width_changed ()
 881 {
 882         float model = widget.get_panner_shell()->pannable()->pan_width_control->get_value();
 883         float view  = width_spinner.get_value() / 100.0;
 884         if (model != view) {
 885                                         widget.get_panner_shell()->panner()->set_width (view);
 886                                 }
 887 }
 888
 889 void
 890 Panner2dWindow::set_bypassed ()
 891 {
 892         bool view = bypass_button.get_active ();
 893         bool model = widget.get_panner_shell()->bypassed ();
 894         if (model != view) {
 895                 bypass_button.set_active(model);
 896         }
 897
 898         set<Evoral::Parameter> params = widget.get_panner_shell()->panner()->what_can_be_automated();
 899         set<Evoral::Parameter>::iterator p = params.find(PanWidthAutomation);
 900         if (p == params.end()) {
 901                 spinner_box.set_sensitive(false);
 902         } else {
 903                 spinner_box.set_sensitive(true);
 904         }
 905 }
 906
 907 void
 908 Panner2dWindow::set_width ()
 909 {
 910         // rounding of spinbox is different from slider -- TODO use slider
 911         float model = (widget.get_panner_shell()->pannable()->pan_width_control->get_value() * 100.0);
 912         float view  = (width_spinner.get_value());
 913         if (model != view) {
 914                 width_spinner.set_value (model);
 915         }
 916 }
 917
 918 bool
 919 Panner2dWindow::on_key_press_event (GdkEventKey* event)
 920 {
 921         return relay_key_press (event, &PublicEditor::instance());
 922 }
 923
 924 bool
 925 Panner2dWindow::on_key_release_event (GdkEventKey*)
 926 {
 927         return true;
 928 }