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 (panshell_connections, invalidator (*this), boost::bind (&Panner2d::handle_state_change, this), gui_context());
  80
  81         panner_shell->panner()->SignalPositionChanged.connect (panner_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_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         radius = rint(radius) + .5;
 170
 171         hoffset = max ((double) (width - height), border);
 172         voffset = max ((double) (height - width), border);
 173
 174         hoffset = rint(hoffset / 2.0);
 175         voffset = rint(voffset / 2.0);
 176
 177         DrawingArea::on_size_allocate (alloc);
 178 }
 179
 180 int
 181 Panner2d::add_signal (const char* text, const AngularVector& a)
 182 {
 183         Target* signal = new Target (a, text);
 184         signals.push_back (signal);
 185         signal->visible = true;
 186
 187         return 0;
 188 }
 189
 190 int
 191 Panner2d::add_speaker (const AngularVector& a)
 192 {
 193         Target* speaker = new Target (a, "");
 194         speakers.push_back (speaker);
 195         speaker->visible = true;
 196         queue_draw ();
 197
 198         return speakers.size() - 1;
 199 }
 200
 201 void
 202 Panner2d::handle_state_change ()
 203 {
 204         panner_connections.drop_connections();
 205         if (!panner_shell->panner()) {
 206                 return;
 207         }
 208
 209         panner_shell->panner()->SignalPositionChanged.connect (panner_connections, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
 210
 211         set<Evoral::Parameter> params = panner_shell->panner()->what_can_be_automated();
 212         set<Evoral::Parameter>::iterator p = params.find(PanElevationAutomation);
 213         bool elev = have_elevation;
 214         have_elevation = (p == params.end()) ? false : true;
 215         if (elev != have_elevation) {
 216                 handle_position_change();
 217         }
 218         queue_draw ();
 219 }
 220
 221 void
 222 Panner2d::label_signals ()
 223 {
 224         uint32_t sz = signals.size();
 225
 226         switch (sz) {
 227                 case 0:
 228                         break;
 229
 230                 case 1:
 231                         signals[0]->set_text ("");
 232                         break;
 233
 234                 case 2:
 235                         signals[0]->set_text (_("L"));
 236                         signals[1]->set_text (_("R"));
 237                         break;
 238
 239                 default:
 240                         for (uint32_t i = 0; i < sz; ++i) {
 241                                 char buf[64];
 242                                 snprintf (buf, sizeof (buf), "%" PRIu32, i + 1);
 243                                 signals[i]->set_text (buf);
 244                         }
 245                         break;
 246         }
 247 }
 248
 249 void
 250 Panner2d::handle_position_change ()
 251 {
 252         uint32_t n;
 253         double w = panner_shell->pannable()->pan_width_control->get_value();
 254
 255         position.position = AngularVector (panner_shell->pannable()->pan_azimuth_control->get_value() * 360.0,
 256                         panner_shell->pannable()->pan_elevation_control->get_value() * 90.0);
 257
 258         for (uint32_t i = 0; i < signals.size(); ++i) {
 259                 signals[i]->position = panner_shell->panner()->signal_position (i);
 260         }
 261
 262         if (w * last_width <= 0) {
 263                 /* changed sign */
 264                 label_signals ();
 265         }
 266
 267         last_width = w;
 268
 269         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 270
 271         for (n = 0; n < speakers.size(); ++n) {
 272                 speakers[n]->position = the_speakers[n].angles();
 273         }
 274
 275         queue_draw ();
 276 }
 277
 278 void
 279 Panner2d::move_signal (int which, const AngularVector& a)
 280 {
 281         if (which >= int (speakers.size())) {
 282                 return;
 283         }
 284
 285         speakers[which]->position = a;
 286         queue_draw ();
 287 }
 288
 289 Panner2d::Target *
 290 Panner2d::find_closest_object (gdouble x, gdouble y, bool& is_signal)
 291 {
 292         Target *closest = 0;
 293         Target *candidate;
 294         float distance;
 295         float best_distance = FLT_MAX;
 296         CartesianVector c;
 297
 298         /* start with the position itself */
 299
 300         PBD::AngularVector dp = position.position;
 301         if (!have_elevation) dp.ele = 0;
 302         dp.azi = 270 - dp.azi;
 303         dp.cartesian (c);
 304
 305         cart_to_gtk (c);
 306         best_distance = sqrt ((c.x - x) * (c.x - x) +
 307                         (c.y - y) * (c.y - y));
 308         closest = &position;
 309
 310 #if 0 // TODO signal grab -> change width, not position
 311         for (Targets::const_iterator i = signals.begin(); i != signals.end(); ++i) {
 312                 candidate = *i;
 313
 314                 candidate->position.cartesian (c);
 315                 cart_to_gtk (c);
 316
 317                 distance = sqrt ((c.x - x) * (c.x - x) +
 318                                 (c.y - y) * (c.y - y));
 319
 320                 if (distance < best_distance) {
 321                         closest = candidate;
 322                         best_distance = distance;
 323                 }
 324         }
 325 #endif
 326
 327         is_signal = true;
 328
 329         if (height > large_size_threshold) {
 330                 /* "big" */
 331                 if (best_distance > 30) { // arbitrary
 332                         closest = 0;
 333                 }
 334         } else {
 335                 /* "small" */
 336                 if (best_distance > 10) { // arbitrary
 337                         closest = 0;
 338                 }
 339         }
 340
 341         /* if we didn't find a signal close by, check the speakers */
 342
 343         if (!closest) {
 344                 for (Targets::const_iterator i = speakers.begin(); i != speakers.end(); ++i) {
 345                         candidate = *i;
 346                         PBD::AngularVector sp = candidate->position;
 347                         sp.azi = 270 -sp.azi;
 348                         CartesianVector c;
 349                         sp.cartesian (c);
 350                         cart_to_gtk (c);
 351
 352                         distance = sqrt ((c.x - x) * (c.x - x) +
 353                                         (c.y - y) * (c.y - y));
 354
 355                         if (distance < best_distance) {
 356                                 closest = candidate;
 357                                 best_distance = distance;
 358                         }
 359                 }
 360
 361                 if (height > large_size_threshold) {
 362                         /* "big" */
 363                         if (best_distance < 30) { // arbitrary
 364                                 is_signal = false;
 365                         } else {
 366                                 closest = 0;
 367                         }
 368                 } else {
 369                         /* "small" */
 370                         if (best_distance < 10) { // arbitrary
 371                                 is_signal = false;
 372                         } else {
 373                                 closest = 0;
 374                         }
 375                 }
 376         }
 377
 378         return closest;
 379 }
 380
 381 bool
 382 Panner2d::on_motion_notify_event (GdkEventMotion *ev)
 383 {
 384         gint x, y;
 385         GdkModifierType state;
 386
 387         if (ev->is_hint) {
 388                 gdk_window_get_pointer (ev->window, &x, &y, &state);
 389         } else {
 390                 x = (int) floor (ev->x);
 391                 y = (int) floor (ev->y);
 392                 state = (GdkModifierType) ev->state;
 393         }
 394
 395         if (ev->state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) {
 396                 did_move = true;
 397         }
 398
 399         return handle_motion (x, y, state);
 400 }
 401
 402 bool
 403 Panner2d::on_expose_event (GdkEventExpose *event)
 404 {
 405         CartesianVector c;
 406         cairo_t* cr;
 407         bool small = (height <= large_size_threshold);
 408         const double diameter = radius*2.0;
 409
 410         cr = gdk_cairo_create (get_window()->gobj());
 411
 412         /* background */
 413
 414         cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height);
 415         if (!panner_shell->bypassed()) {
 416                 cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 1.0);
 417         } else {
 418                 cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 0.2);
 419         }
 420         cairo_fill_preserve (cr);
 421         cairo_clip (cr);
 422
 423         /* offset to give us some border */
 424
 425         cairo_translate (cr, hoffset, voffset);
 426
 427         cairo_set_line_width (cr, 1.0);
 428
 429         /* horizontal line of "crosshairs" */
 430
 431         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 432         cairo_move_to (cr, 0.0, radius);
 433         cairo_line_to (cr, diameter, radius);
 434         cairo_stroke (cr);
 435
 436         /* vertical line of "crosshairs" */
 437
 438         cairo_move_to (cr, radius, 0);
 439         cairo_line_to (cr, radius, diameter);
 440         cairo_stroke (cr);
 441
 442         /* the circle on which signals live */
 443
 444         cairo_set_line_width (cr, 1.5);
 445         cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, 1.0);
 446         cairo_arc (cr, radius, radius, radius, 0.0, 2.0 * M_PI);
 447         cairo_stroke (cr);
 448
 449         for (uint32_t rad = 15; rad < 90; rad += 15) {
 450                 cairo_set_line_width (cr, .5 + (float)rad / 150.0);
 451                 if (rad == 45) {
 452                         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 453                 } else {
 454                         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.8);
 455                 }
 456                 cairo_new_path (cr);
 457                 cairo_arc (cr, radius, radius, radius * sin(M_PI * (float) rad / 180.0), 0, 2.0 * M_PI);
 458                 cairo_stroke (cr);
 459         }
 460
 461         if (!panner_shell->bypassed()) {
 462                 /* convention top == front ^= azimuth == .5 (same as stereo/mono panners) */
 463
 464                 if (signals.size() > 1) {
 465                         /* arc to show "diffusion" */
 466
 467                         double width_angle = fabs (panner_shell->pannable()->pan_width_control->get_value()) * 2 * M_PI;
 468                         double position_angle = panner_shell->pannable()->pan_azimuth_control->get_value() * 2 * M_PI;
 469
 470                         cairo_save (cr);
 471                         cairo_translate (cr, radius, radius);
 472                         cairo_rotate (cr, M_PI / 2.0);
 473                         cairo_rotate (cr, position_angle - (width_angle/2.0));
 474                         cairo_move_to (cr, 0, 0);
 475                         cairo_arc_negative (cr, 0, 0, radius, width_angle, 0.0);
 476                         cairo_close_path (cr);
 477                         if (panner_shell->pannable()->pan_width_control->get_value() >= 0.0) {
 478                                 /* normal width */
 479                                 cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.45);
 480                         } else {
 481                                 /* inverse width */
 482                                 cairo_set_source_rgba (cr, 1.0, 0.419, 0.419, 0.45);
 483                         }
 484                         cairo_fill (cr);
 485                         cairo_restore (cr);
 486                 }
 487
 488                 double arc_radius;
 489
 490                 cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 491
 492                 if (small) {
 493                         arc_radius = 4.0;
 494                 } else {
 495                         cairo_set_font_size (cr, 10);
 496                         arc_radius = 12.0;
 497                 }
 498
 499                 /* draw position */
 500
 501                 PBD::AngularVector dp = position.position;
 502                 if (!have_elevation) dp.ele = 0;
 503                 dp.azi = 270 - dp.azi;
 504                 dp.cartesian (c);
 505                 cart_to_gtk (c);
 506
 507                 cairo_new_path (cr);
 508                 cairo_arc (cr, c.x, c.y, arc_radius + 1.0, 0, 2.0 * M_PI);
 509                 cairo_set_source_rgba (cr, 1.0, 0.419, 0.419, 0.85);
 510                 cairo_fill_preserve (cr);
 511                 cairo_set_source_rgba (cr, 1.0, 0.905, 0.905, 0.85);
 512                 cairo_stroke (cr);
 513
 514                 /* signals */
 515
 516                 if (signals.size() > 0) {
 517                         for (Targets::iterator i = signals.begin(); i != signals.end(); ++i) {
 518                                 Target* signal = *i;
 519
 520                                 if (signal->visible) {
 521
 522                                         /* TODO check for overlap - multiple src at same position
 523                                          * -> visualize it properly
 524                                          */
 525                                         PBD::AngularVector sp = signal->position;
 526                                         if (!have_elevation) sp.ele = 0;
 527                                         sp.azi += 270.0;
 528                                         sp.cartesian (c);
 529                                         cart_to_gtk (c);
 530
 531                                         cairo_new_path (cr);
 532                                         cairo_arc (cr, c.x, c.y, arc_radius, 0, 2.0 * M_PI);
 533                                         cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 0.75);
 534                                         cairo_fill_preserve (cr);
 535                                         cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, 0.8);
 536                                         cairo_stroke (cr);
 537
 538                                         if (!small && !signal->text.empty()) {
 539                                                 cairo_set_source_rgba (cr, 0.517, 0.772, 0.882, .9);
 540                                                 /* the +/- adjustments are a hack to try to center the text in the circle
 541                                                  * TODO use pango get_pixel_size() -- see mono_panner.cc
 542                                                  */
 543                                                 if (small) {
 544                                                         cairo_move_to (cr, c.x - 1, c.y + 1);
 545                                                 } else {
 546                                                         cairo_move_to (cr, c.x - 4, c.y + 4);
 547                                                 }
 548                                                 cairo_show_text (cr, signal->text.c_str());
 549                                         }
 550                                 }
 551                         }
 552                 }
 553
 554                 /* speakers */
 555
 556                 int n = 0;
 557
 558                 for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
 559                         Target *speaker = *i;
 560                         char buf[256];
 561                         ++n;
 562
 563                         if (speaker->visible) {
 564
 565                                 PBD::AngularVector sp = speaker->position;
 566                                 sp.azi += 270.0;
 567                                 CartesianVector c;
 568                                 sp.cartesian (c);
 569                                 cart_to_gtk (c);
 570
 571                                 snprintf (buf, sizeof (buf), "%d", n);
 572
 573                                 /* stroke out a speaker shape */
 574
 575                                 cairo_move_to (cr, c.x, c.y);
 576                                 cairo_save (cr);
 577                                 cairo_rotate (cr, -(sp.azi/360.0) * (2.0 * M_PI));
 578                                 if (small) {
 579                                         cairo_scale (cr, 0.8, 0.8);
 580                                 } else {
 581                                         cairo_scale (cr, 1.2, 1.2);
 582                                 }
 583                                 cairo_rel_line_to (cr, 4, -2);
 584                                 cairo_rel_line_to (cr, 0, -7);
 585                                 cairo_rel_line_to (cr, 5, +5);
 586                                 cairo_rel_line_to (cr, 5, 0);
 587                                 cairo_rel_line_to (cr, 0, 5);
 588                                 cairo_rel_line_to (cr, -5, 0);
 589                                 cairo_rel_line_to (cr, -5, +5);
 590                                 cairo_rel_line_to (cr, 0, -7);
 591                                 cairo_close_path (cr);
 592                                 cairo_set_source_rgba (cr, 0.282, 0.517, 0.662, 1.0);
 593                                 cairo_fill (cr);
 594                                 cairo_restore (cr);
 595
 596                                 if (!small) {
 597                                         cairo_set_font_size (cr, 16);
 598
 599                                         /* move the text in just a bit */
 600
 601                                         AngularVector textpos (speaker->position.azi + 270.0, speaker->position.ele, 0.85);
 602
 603                                         textpos.cartesian (c);
 604                                         cart_to_gtk (c);
 605                                         cairo_move_to (cr, c.x, c.y);
 606                                         cairo_show_text (cr, buf);
 607                                 }
 608
 609                         }
 610                 }
 611         }
 612
 613         cairo_destroy (cr);
 614
 615         return true;
 616 }
 617
 618 bool
 619 Panner2d::on_button_press_event (GdkEventButton *ev)
 620 {
 621         GdkModifierType state;
 622         int x;
 623         int y;
 624         bool is_signal;
 625
 626         if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
 627                 return false;
 628         }
 629
 630         did_move = false;
 631
 632         switch (ev->button) {
 633         case 1:
 634         case 2:
 635                 x = ev->x - hoffset;
 636                 y = ev->y - voffset;
 637
 638                 if ((drag_target = find_closest_object (x, y, is_signal)) != 0) {
 639                         if (!is_signal) {
 640                                 panner_shell->panner()->set_position (drag_target->position.azi/360.0);
 641                                 drag_target = 0;
 642                         } else {
 643                                 drag_target->set_selected (true);
 644                         }
 645                 }
 646
 647                 state = (GdkModifierType) ev->state;
 648                 return handle_motion (ev->x, ev->y, state);
 649                 break;
 650
 651         default:
 652                 break;
 653         }
 654
 655         return false;
 656 }
 657
 658 bool
 659 Panner2d::on_button_release_event (GdkEventButton *ev)
 660 {
 661         gint x, y;
 662         GdkModifierType state;
 663         bool ret = false;
 664
 665         switch (ev->button) {
 666         case 1:
 667                 x = (int) floor (ev->x);
 668                 y = (int) floor (ev->y);
 669                 state = (GdkModifierType) ev->state;
 670                 ret = handle_motion (x, y, state);
 671                 drag_target = 0;
 672                 break;
 673
 674         case 2:
 675                 x = (int) floor (ev->x);
 676                 y = (int) floor (ev->y);
 677                 state = (GdkModifierType) ev->state;
 678
 679                 if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
 680                         toggle_bypass ();
 681                         ret = true;
 682                 } else {
 683                         ret = handle_motion (x, y, state);
 684                 }
 685
 686                 drag_target = 0;
 687                 break;
 688
 689         case 3:
 690                 break;
 691
 692         }
 693
 694         return ret;
 695 }
 696
 697 gint
 698 Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
 699 {
 700         if (drag_target == 0) {
 701                 return false;
 702         }
 703
 704         if ((state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) == 0) {
 705                 return false;
 706         }
 707
 708         evx -= hoffset;
 709         evy -= voffset;
 710
 711         if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
 712                 CartesianVector c;
 713                 bool need_move = false;
 714
 715                 drag_target->position.cartesian (c);
 716                 cart_to_gtk (c);
 717
 718                 if ((evx != c.x) || (evy != c.y)) {
 719                         need_move = true;
 720                 }
 721
 722                 if (need_move) {
 723                         CartesianVector cp (evx, evy, 0.0);
 724                         AngularVector av;
 725                         gtk_to_cart (cp);
 726
 727                         if (!have_elevation) {
 728                                 clamp_to_circle (cp.x, cp.y);
 729                                 cp.angular (av);
 730                                 av.azi = fmod(270 - av.azi, 360);
 731                                 if (drag_target == &position) {
 732                                         double degree_fract = av.azi / 360.0;
 733                                         panner_shell->panner()->set_position (degree_fract);
 734                                 }
 735                         } else {
 736                                 /* sphere projection */
 737                                 sphere_project (cp.x, cp.y, cp.z);
 738
 739                                 double r2d = 180.0 / M_PI;
 740                                 av.azi = r2d * atan2(cp.y, cp.x);
 741                                 av.ele = r2d * asin(cp.z);
 742                                 av.azi = fmod(270 - av.azi, 360);
 743
 744                                 if (drag_target == &position) {
 745                                         double azi_fract = av.azi / 360.0;
 746                                         double ele_fract = av.ele / 90.0;
 747                                         panner_shell->panner()->set_position (azi_fract);
 748                                         panner_shell->panner()->set_elevation (ele_fract);
 749                                 }
 750                         }
 751                 }
 752         }
 753
 754         return true;
 755 }
 756
 757 bool
 758 Panner2d::on_scroll_event (GdkEventScroll* ev)
 759 {
 760         switch (ev->direction) {
 761         case GDK_SCROLL_UP:
 762         case GDK_SCROLL_RIGHT:
 763                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() - 1.0/360.0);
 764                 break;
 765
 766         case GDK_SCROLL_DOWN:
 767         case GDK_SCROLL_LEFT:
 768                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() + 1.0/360.0);
 769                 break;
 770         }
 771         return true;
 772 }
 773
 774 void
 775 Panner2d::cart_to_gtk (CartesianVector& c) const
 776 {
 777         /* cartesian coordinate space:
 778               center = 0.0
 779               dimension = 2.0 * 2.0
 780               increasing y moves up
 781               so max values along each axis are -1..+1
 782
 783            GTK uses a coordinate space that is:
 784               top left = 0.0
 785               dimension = (radius*2.0) * (radius*2.0)
 786               increasing y moves down
 787         */
 788         const double diameter = radius*2.0;
 789
 790         c.x = diameter * ((c.x + 1.0) / 2.0);
 791         /* extra subtraction inverts the y-axis to match "increasing y moves down" */
 792         c.y = diameter - (diameter * ((c.y + 1.0) / 2.0));
 793 }
 794
 795 void
 796 Panner2d::gtk_to_cart (CartesianVector& c) const
 797 {
 798         const double diameter = radius*2.0;
 799         c.x = ((c.x / diameter) * 2.0) - 1.0;
 800         c.y = (((diameter - c.y) / diameter) * 2.0) - 1.0;
 801 }
 802
 803 void
 804 Panner2d::sphere_project (double& x, double& y, double& z)
 805 {
 806         double r, r2;
 807         r2 = x * x + y * y;
 808         if (r2 < 1.0) {
 809                 z = sqrt (1.0 - r2);
 810         } else {
 811                 r = sqrt (r2);
 812                 x = x / r;
 813                 y = y / r;
 814                 z = 0.0;
 815         }
 816 }
 817
 818 void
 819 Panner2d::clamp_to_circle (double& x, double& y)
 820 {
 821         double azi, ele;
 822         double z = 0.0;
 823         double l;
 824         PBD::cartesian_to_spherical (x, y, z, azi, ele, l);
 825         PBD::spherical_to_cartesian (azi, ele, 1.0, x, y, z);
 826 }
 827
 828 void
 829 Panner2d::toggle_bypass ()
 830 {
 831         panner_shell->set_bypassed (!panner_shell->bypassed());
 832 }
 833
 834 Panner2dWindow::Panner2dWindow (boost::shared_ptr<PannerShell> p, int32_t h, uint32_t inputs)
 835         : ArdourWindow (_("Panner (2D)"))
 836         , widget (p, h)
 837         , bypass_button (_("Bypass"))
 838         , width_adjustment (0, -100, 100, 1, 5, 0)
 839         , width_spinner (width_adjustment)
 840 {
 841         widget.set_name ("MixerPanZone");
 842
 843         set_title (_("Panner"));
 844         widget.set_size_request (h, h);
 845
 846         bypass_button.signal_toggled().connect (sigc::mem_fun (*this, &Panner2dWindow::bypass_toggled));
 847         width_spinner.signal_changed().connect (sigc::mem_fun (*this, &Panner2dWindow::width_changed));
 848
 849         p->Changed.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2dWindow::set_bypassed, this), gui_context());
 850         /* needed for the width-spinbox in the main window */
 851         p->PannableChanged.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2dWindow::pannable_handler, this), gui_context());
 852         p->pannable()->pan_width_control->Changed.connect (panvalue_connections, invalidator(*this), boost::bind (&Panner2dWindow::set_width, this), gui_context());
 853
 854
 855         button_box.set_spacing (6);
 856         button_box.pack_start (bypass_button, false, false);
 857
 858         left_side.set_spacing (6);
 859
 860         left_side.pack_start (button_box, false, false);
 861
 862         Gtk::Label* l = manage (new Label (
 863                                 p->panner()->describe_parameter(PanWidthAutomation),
 864                                 Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false));
 865         spinner_box.pack_start (*l, false, false);
 866         spinner_box.pack_start (width_spinner, false, false);
 867         left_side.pack_start (spinner_box, false, false);
 868
 869         l->show ();
 870         bypass_button.show ();
 871         button_box.show ();
 872         width_spinner.show ();
 873         spinner_box.show ();
 874         left_side.show ();
 875
 876         hpacker.set_spacing (6);
 877         hpacker.set_border_width (12);
 878         hpacker.pack_start (widget, false, false);
 879         hpacker.pack_start (left_side, false, false);
 880         hpacker.show ();
 881
 882         add (hpacker);
 883         reset (inputs);
 884         set_width();
 885         set_bypassed();
 886         widget.show ();
 887 }
 888
 889 void
 890 Panner2dWindow::reset (uint32_t n_inputs)
 891 {
 892         widget.reset (n_inputs);
 893 }
 894
 895 void
 896 Panner2dWindow::bypass_toggled ()
 897 {
 898         bool view = bypass_button.get_active ();
 899         bool model = widget.get_panner_shell()->bypassed ();
 900
 901         if (model != view) {
 902                 widget.get_panner_shell()->set_bypassed (view);
 903         }
 904 }
 905 void
 906 Panner2dWindow::width_changed ()
 907 {
 908         float model = widget.get_panner_shell()->pannable()->pan_width_control->get_value();
 909         float view  = width_spinner.get_value() / 100.0;
 910         if (model != view) {
 911                 widget.get_panner_shell()->panner()->set_width (view);
 912         }
 913 }
 914
 915 void
 916 Panner2dWindow::pannable_handler ()
 917 {
 918         panvalue_connections.drop_connections();
 919         widget.get_panner_shell()->pannable()->pan_width_control->Changed.connect (panvalue_connections, invalidator(*this), boost::bind (&Panner2dWindow::set_width, this), gui_context());
 920         set_width();
 921 }
 922
 923 void
 924 Panner2dWindow::set_bypassed ()
 925 {
 926         bool view = bypass_button.get_active ();
 927         bool model = widget.get_panner_shell()->bypassed ();
 928         if (model != view) {
 929                 bypass_button.set_active(model);
 930         }
 931
 932         set<Evoral::Parameter> params = widget.get_panner_shell()->panner()->what_can_be_automated();
 933         set<Evoral::Parameter>::iterator p = params.find(PanWidthAutomation);
 934         if (p == params.end()) {
 935                 spinner_box.set_sensitive(false);
 936         } else {
 937                 spinner_box.set_sensitive(true);
 938         }
 939 }
 940
 941 void
 942 Panner2dWindow::set_width ()
 943 {
 944         // rounding of spinbox is different from slider -- TODO use slider
 945         float model = (widget.get_panner_shell()->pannable()->pan_width_control->get_value() * 100.0);
 946         float view  = (width_spinner.get_value());
 947         if (model != view) {
 948                 width_spinner.set_value (model);
 949         }
 950 }
 951
 952 bool
 953 Panner2dWindow::on_key_press_event (GdkEventKey* event)
 954 {
 955         return relay_key_press (event, &PublicEditor::instance());
 956 }
 957
 958 bool
 959 Panner2dWindow::on_key_release_event (GdkEventKey*)
 960 {
 961         return true;
 962 }