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