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