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