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 "gtkmm2ext/colors.h"
  37
  38 #include "panner2d.h"
  39 #include "keyboard.h"
  40 #include "gui_thread.h"
  41 #include "rgb_macros.h"
  42 #include "utils.h"
  43 #include "public_editor.h"
  44 #include "ui_config.h"
  45
  46 #include "pbd/i18n.h"
  47
  48 using namespace std;
  49 using namespace Gtk;
  50 using namespace ARDOUR;
  51 using namespace ARDOUR_UI_UTILS;
  52 using namespace PBD;
  53 using Gtkmm2ext::Keyboard;
  54
  55 Panner2d::ColorScheme Panner2d::colors;
  56 bool Panner2d::have_colors = false;
  57
  58 static const int large_size_threshold = 100;
  59 static const int large_border_width = 25;
  60 static const int small_border_width = 8;
  61
  62 Panner2d::Target::Target (const AngularVector& a, const char *txt)
  63         : position (a)
  64         , text (txt)
  65         , _selected (false)
  66 {
  67 }
  68
  69 Panner2d::Target::~Target ()
  70 {
  71 }
  72
  73 void
  74 Panner2d::Target::set_text (const char* txt)
  75 {
  76         text = txt;
  77 }
  78
  79 Panner2d::Panner2d (boost::shared_ptr<PannerShell> p, int32_t h)
  80 : panner_shell (p)
  81         , position (AngularVector (0.0, 0.0), "")
  82         , width (0)
  83         , height (h)
  84         , last_width (0)
  85         , have_elevation (false)
  86         , _send_mode (false)
  87 {
  88         if (!have_colors) {
  89                 set_colors ();
  90                 have_colors = true;
  91         }
  92
  93         UIConfiguration::instance().ColorsChanged.connect (sigc::mem_fun (*this, &Panner2d::color_handler));
  94
  95         panner_shell->Changed.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2d::handle_state_change, this), gui_context());
  96
  97         panner_shell->panner()->SignalPositionChanged.connect (panner_connections, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
  98
  99         drag_target = 0;
 100         set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
 101
 102         handle_state_change ();
 103         handle_position_change ();
 104 }
 105
 106 Panner2d::~Panner2d()
 107 {
 108         for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
 109                 delete *i;
 110         }
 111         for (Targets::iterator i = signals.begin(); i != signals.end(); ++i) {
 112                 delete *i;
 113         }
 114 }
 115
 116 void
 117 Panner2d::set_colors ()
 118 {
 119         // TODO get all colors from theme, resolve dups
 120         colors.background = UIConfiguration::instance().color ("mono panner bg");
 121         colors.crosshairs =          0x4884a9ff; // 0.282, 0.517, 0.662, 1.0
 122         colors.signalcircle_border = 0x84c5e1ff; // 0.517, 0.772, 0.882, 1.0
 123         colors.signalcircle =        0x4884a9ff; // 0.282, 0.517, 0.662, 1.0  // also used with a = 0.9
 124         colors.diffusion =           0x4884a973; // 0.282, 0.517, 0.662, 0.45
 125         colors.diffusion_inv =       0xff6b6b73; // 1.0,   0.419, 0.419, 0.45
 126         colors.pos_outline =         0xffe7e7d9; // 1.0,   0.905, 0.905, 0.85
 127         colors.pos_fill =            0xff6b6bd9; // 1.0,   0.419, 0.419, 0.85
 128         colors.signal_outline =      0x84c5e1cc; // 0.517, 0.772, 0.882, 0.8
 129         colors.signal_fill =         0x4884a9bf; // 0.282, 0.517, 0.662, 0.75
 130         colors.speaker_fill =        0x4884a9ff; // 0.282, 0.517, 0.662, 1.0
 131         colors.text =                0x84c5e1e6; // 0.517, 0.772, 0.882, 0.9
 132 }
 133
 134 void
 135 Panner2d::color_handler ()
 136 {
 137         set_colors ();
 138         queue_draw ();
 139 }
 140
 141 void
 142 Panner2d::reset (uint32_t n_inputs)
 143 {
 144         uint32_t nouts = panner_shell->panner()->out().n_audio();
 145
 146         /* signals */
 147
 148         while (signals.size() < n_inputs) {
 149                 add_signal ("", AngularVector());
 150         }
 151
 152         if (signals.size() > n_inputs) {
 153                 for (uint32_t i = signals.size(); i < n_inputs; ++i) {
 154                         delete signals[i];
 155                 }
 156
 157                 signals.resize (n_inputs);
 158         }
 159
 160         label_signals ();
 161
 162         for (uint32_t i = 0; i < n_inputs; ++i) {
 163                 signals[i]->position = panner_shell->panner()->signal_position (i);
 164         }
 165
 166         /* add all outputs */
 167
 168         while (speakers.size() < nouts) {
 169                 add_speaker (AngularVector());
 170         }
 171
 172         if (speakers.size() > nouts) {
 173                 for (uint32_t i = nouts; i < speakers.size(); ++i) {
 174                         delete speakers[i];
 175                 }
 176
 177                 speakers.resize (nouts);
 178         }
 179
 180         for (Targets::iterator x = speakers.begin(); x != speakers.end(); ++x) {
 181                 (*x)->visible = false;
 182         }
 183
 184         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 185
 186         for (uint32_t n = 0; n < nouts; ++n) {
 187                 char buf[16];
 188
 189                 snprintf (buf, sizeof (buf), "%d", n+1);
 190                 speakers[n]->set_text (buf);
 191                 speakers[n]->position = the_speakers[n].angles();
 192                 speakers[n]->visible = true;
 193         }
 194
 195         queue_draw ();
 196 }
 197
 198 void
 199 Panner2d::on_size_allocate (Gtk::Allocation& alloc)
 200 {
 201         width = alloc.get_width();
 202         height = alloc.get_height();
 203
 204         if (height > large_size_threshold) {
 205                 border = large_border_width;
 206         } else {
 207                 border = small_border_width;
 208         }
 209
 210         radius = min (width, height);
 211         radius -= border;
 212         radius /= 2;
 213         radius = rint(radius) + .5;
 214
 215         hoffset = max ((double) (width - height), border);
 216         voffset = max ((double) (height - width), border);
 217
 218         hoffset = rint(hoffset / 2.0);
 219         voffset = rint(voffset / 2.0);
 220
 221         DrawingArea::on_size_allocate (alloc);
 222 }
 223
 224 int
 225 Panner2d::add_signal (const char* text, const AngularVector& a)
 226 {
 227         Target* signal = new Target (a, text);
 228         signals.push_back (signal);
 229         signal->visible = true;
 230
 231         return 0;
 232 }
 233
 234 int
 235 Panner2d::add_speaker (const AngularVector& a)
 236 {
 237         Target* speaker = new Target (a, "");
 238         speakers.push_back (speaker);
 239         speaker->visible = true;
 240         queue_draw ();
 241
 242         return speakers.size() - 1;
 243 }
 244
 245 void
 246 Panner2d::handle_state_change ()
 247 {
 248         panner_connections.drop_connections();
 249         if (!panner_shell->panner()) {
 250                 return;
 251         }
 252
 253         panner_shell->panner()->SignalPositionChanged.connect (panner_connections, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
 254
 255         set<Evoral::Parameter> params = panner_shell->panner()->what_can_be_automated();
 256         set<Evoral::Parameter>::iterator p = params.find(PanElevationAutomation);
 257         bool elev = have_elevation;
 258         have_elevation = (p == params.end()) ? false : true;
 259         if (elev != have_elevation) {
 260                 handle_position_change();
 261         }
 262         queue_draw ();
 263 }
 264
 265 void
 266 Panner2d::label_signals ()
 267 {
 268         uint32_t sz = signals.size();
 269
 270         switch (sz) {
 271                 case 0:
 272                         break;
 273
 274                 case 1:
 275                         signals[0]->set_text ("");
 276                         break;
 277
 278                 case 2:
 279                         signals[0]->set_text (S_("Panner|L"));
 280                         signals[1]->set_text (S_("Panner|R"));
 281                         break;
 282
 283                 default:
 284                         for (uint32_t i = 0; i < sz; ++i) {
 285                                 char buf[64];
 286                                 snprintf (buf, sizeof (buf), "%" PRIu32, i + 1);
 287                                 signals[i]->set_text (buf);
 288                         }
 289                         break;
 290         }
 291 }
 292
 293 void
 294 Panner2d::handle_position_change ()
 295 {
 296         uint32_t n;
 297         double w = panner_shell->pannable()->pan_width_control->get_value();
 298
 299         position.position = AngularVector (panner_shell->pannable()->pan_azimuth_control->get_value() * 360.0,
 300                                            panner_shell->pannable()->pan_elevation_control->get_value() * 90.0);
 301
 302         for (uint32_t i = 0; i < signals.size(); ++i) {
 303                 signals[i]->position = panner_shell->panner()->signal_position (i);
 304         }
 305
 306         if (w * last_width <= 0) {
 307                 /* changed sign */
 308                 label_signals ();
 309         }
 310
 311         last_width = w;
 312
 313         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 314
 315         for (n = 0; n < speakers.size(); ++n) {
 316                 speakers[n]->position = the_speakers[n].angles();
 317         }
 318
 319         queue_draw ();
 320 }
 321
 322 void
 323 Panner2d::move_signal (int which, const AngularVector& a)
 324 {
 325         if (which >= int (speakers.size())) {
 326                 return;
 327         }
 328
 329         speakers[which]->position = a;
 330         queue_draw ();
 331 }
 332
 333 Panner2d::Target *
 334 Panner2d::find_closest_object (gdouble x, gdouble y, bool& is_signal)
 335 {
 336         Target *closest = 0;
 337         Target *candidate;
 338         float distance;
 339         float best_distance = FLT_MAX;
 340         CartesianVector c;
 341
 342         /* start with the position itself */
 343
 344         PBD::AngularVector dp = position.position;
 345         if (!have_elevation) dp.ele = 0;
 346         dp.azi = 270 - dp.azi;
 347         dp.cartesian (c);
 348
 349         cart_to_gtk (c);
 350         best_distance = sqrt ((c.x - x) * (c.x - x) +
 351                         (c.y - y) * (c.y - y));
 352         closest = &position;
 353
 354 #if 0 // TODO signal grab -> change width, not position
 355         for (Targets::const_iterator i = signals.begin(); i != signals.end(); ++i) {
 356                 candidate = *i;
 357
 358                 candidate->position.cartesian (c);
 359                 cart_to_gtk (c);
 360
 361                 distance = sqrt ((c.x - x) * (c.x - x) +
 362                                 (c.y - y) * (c.y - y));
 363
 364                 if (distance < best_distance) {
 365                         closest = candidate;
 366                         best_distance = distance;
 367                 }
 368         }
 369 #endif
 370
 371         is_signal = true;
 372
 373         if (height > large_size_threshold) {
 374                 /* "big" */
 375                 if (best_distance > 30) { // arbitrary
 376                         closest = 0;
 377                 }
 378         } else {
 379                 /* "small" */
 380                 if (best_distance > 10) { // arbitrary
 381                         closest = 0;
 382                 }
 383         }
 384
 385         /* if we didn't find a signal close by, check the speakers */
 386
 387         if (!closest) {
 388                 for (Targets::const_iterator i = speakers.begin(); i != speakers.end(); ++i) {
 389                         candidate = *i;
 390                         PBD::AngularVector sp = candidate->position;
 391                         sp.azi = 270 -sp.azi;
 392                         CartesianVector c;
 393                         sp.cartesian (c);
 394                         cart_to_gtk (c);
 395
 396                         distance = sqrt ((c.x - x) * (c.x - x) +
 397                                         (c.y - y) * (c.y - y));
 398
 399                         if (distance < best_distance) {
 400                                 closest = candidate;
 401                                 best_distance = distance;
 402                         }
 403                 }
 404
 405                 if (height > large_size_threshold) {
 406                         /* "big" */
 407                         if (best_distance < 30) { // arbitrary
 408                                 is_signal = false;
 409                         } else {
 410                                 closest = 0;
 411                         }
 412                 } else {
 413                         /* "small" */
 414                         if (best_distance < 10) { // arbitrary
 415                                 is_signal = false;
 416                         } else {
 417                                 closest = 0;
 418                         }
 419                 }
 420         }
 421
 422         return closest;
 423 }
 424
 425 void
 426 Panner2d::set_send_drawing_mode (bool onoff)
 427 {
 428         if (_send_mode != onoff) {
 429                 _send_mode = onoff;
 430                 queue_draw ();
 431         }
 432 }
 433
 434 bool
 435 Panner2d::on_motion_notify_event (GdkEventMotion *ev)
 436 {
 437         gint x, y;
 438         GdkModifierType state;
 439
 440         if (ev->is_hint) {
 441                 gdk_window_get_pointer (ev->window, &x, &y, &state);
 442         } else {
 443                 x = (int) floor (ev->x);
 444                 y = (int) floor (ev->y);
 445                 state = (GdkModifierType) ev->state;
 446         }
 447
 448         if (ev->state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) {
 449                 did_move = true;
 450         }
 451
 452         return handle_motion (x, y, state);
 453 }
 454
 455 #define CSSRGBA(CL) \
 456         cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(CL), UINT_RGBA_G_FLT(CL), UINT_RGBA_B_FLT(CL), UINT_RGBA_A_FLT(CL));
 457
 458 #define CSSRGB(CL, A) \
 459         cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(CL), UINT_RGBA_G_FLT(CL), UINT_RGBA_B_FLT(CL), A);
 460 bool
 461 Panner2d::on_expose_event (GdkEventExpose *event)
 462 {
 463         CartesianVector c;
 464         cairo_t* cr;
 465         bool xsmall = (height <= large_size_threshold);
 466         const double diameter = radius*2.0;
 467
 468         cr = gdk_cairo_create (get_window()->gobj());
 469
 470         /* background */
 471
 472         cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height);
 473
 474         uint32_t bg = colors.background;
 475         if (_send_mode) {
 476                 bg = UIConfiguration::instance().color ("send bg");
 477         }
 478
 479         if (!panner_shell->bypassed()) {
 480                 CSSRGBA(bg);
 481         } else {
 482                 CSSRGB(bg, 0.2);
 483         }
 484         cairo_fill_preserve (cr);
 485         cairo_clip (cr);
 486
 487         /* offset to give us some border */
 488
 489         cairo_translate (cr, hoffset, voffset);
 490
 491         cairo_set_line_width (cr, 1.0);
 492
 493         /* horizontal line of "crosshairs" */
 494
 495         CSSRGBA(colors.crosshairs);
 496         cairo_move_to (cr, 0.0, radius);
 497         cairo_line_to (cr, diameter, radius);
 498         cairo_stroke (cr);
 499
 500         /* vertical line of "crosshairs" */
 501
 502         cairo_move_to (cr, radius, 0);
 503         cairo_line_to (cr, radius, diameter);
 504         cairo_stroke (cr);
 505
 506         /* the circle on which signals live */
 507
 508         cairo_set_line_width (cr, 1.5);
 509         CSSRGBA(colors.signalcircle_border);
 510         cairo_arc (cr, radius, radius, radius, 0.0, 2.0 * M_PI);
 511         cairo_stroke (cr);
 512
 513         for (uint32_t rad = 15; rad < 90; rad += 15) {
 514                 cairo_set_line_width (cr, .5 + (float)rad / 150.0);
 515                 if (rad == 45) {
 516                         CSSRGBA(colors.signalcircle);
 517                 } else {
 518                         CSSRGB(colors.signalcircle, 0.9);
 519                 }
 520                 cairo_new_path (cr);
 521                 cairo_arc (cr, radius, radius, radius * sin(M_PI * (float) rad / 180.0), 0, 2.0 * M_PI);
 522                 cairo_stroke (cr);
 523         }
 524
 525         if (!panner_shell->bypassed()) {
 526                 /* convention top == front ^= azimuth == .5 (same as stereo/mono panners) */
 527
 528                 if (signals.size() > 1) {
 529                         /* arc to show "diffusion" */
 530
 531                         double width_angle = fabs (panner_shell->pannable()->pan_width_control->get_value()) * 2 * M_PI;
 532                         double position_angle = panner_shell->pannable()->pan_azimuth_control->get_value() * 2 * M_PI;
 533
 534                         cairo_save (cr);
 535                         cairo_translate (cr, radius, radius);
 536                         cairo_rotate (cr, M_PI / 2.0);
 537                         cairo_rotate (cr, position_angle - (width_angle/2.0));
 538                         cairo_move_to (cr, 0, 0);
 539                         cairo_arc_negative (cr, 0, 0, radius, width_angle, 0.0);
 540                         cairo_close_path (cr);
 541                         if (panner_shell->pannable()->pan_width_control->get_value() >= 0.0) {
 542                                 /* normal width */
 543                                 CSSRGBA(colors.diffusion);
 544                         } else {
 545                                 /* inverse width */
 546                                 CSSRGBA(colors.diffusion_inv);
 547                         }
 548                         cairo_fill (cr);
 549                         cairo_restore (cr);
 550                 }
 551
 552                 double arc_radius;
 553
 554                 cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 555
 556                 if (xsmall) {
 557                         arc_radius = 4.0;
 558                 } else {
 559                         cairo_set_font_size (cr, 10);
 560                         arc_radius = 12.0;
 561                 }
 562
 563                 /* draw position */
 564
 565                 PBD::AngularVector dp = position.position;
 566                 if (!have_elevation) dp.ele = 0;
 567                 dp.azi = 270 - dp.azi;
 568                 dp.cartesian (c);
 569                 cart_to_gtk (c);
 570
 571                 cairo_new_path (cr);
 572                 cairo_arc (cr, c.x, c.y, arc_radius + 1.0, 0, 2.0 * M_PI);
 573                 CSSRGBA(colors.pos_fill);
 574                 cairo_fill_preserve (cr);
 575                 CSSRGBA(colors.pos_outline);
 576                 cairo_stroke (cr);
 577
 578                 /* signals */
 579
 580                 if (signals.size() > 0) {
 581                         for (Targets::iterator i = signals.begin(); i != signals.end(); ++i) {
 582                                 Target* signal = *i;
 583
 584                                 if (signal->visible) {
 585
 586                                         /* TODO check for overlap - multiple src at same position
 587                                          * -> visualize it properly
 588                                          */
 589                                         PBD::AngularVector sp = signal->position;
 590                                         if (!have_elevation) sp.ele = 0;
 591                                         sp.azi += 270.0;
 592                                         sp.cartesian (c);
 593                                         cart_to_gtk (c);
 594
 595                                         cairo_new_path (cr);
 596                                         cairo_arc (cr, c.x, c.y, arc_radius, 0, 2.0 * M_PI);
 597                                         CSSRGBA(colors.signal_fill);
 598                                         cairo_fill_preserve (cr);
 599                                         CSSRGBA(colors.signal_outline);
 600                                         cairo_stroke (cr);
 601
 602                                         if (!xsmall && !signal->text.empty()) {
 603                                                 CSSRGBA(colors.text);
 604                                                 /* the +/- adjustments are a hack to try to center the text in the circle
 605                                                  * TODO use pango get_pixel_size() -- see mono_panner.cc
 606                                                  */
 607                                                 if (xsmall) {
 608                                                         cairo_move_to (cr, c.x - 1, c.y + 1);
 609                                                 } else {
 610                                                         cairo_move_to (cr, c.x - 4, c.y + 4);
 611                                                 }
 612                                                 cairo_show_text (cr, signal->text.c_str());
 613                                         }
 614                                 }
 615                         }
 616                 }
 617
 618                 /* speakers */
 619
 620                 int n = 0;
 621
 622                 for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
 623                         Target *speaker = *i;
 624                         char buf[256];
 625                         ++n;
 626
 627                         if (speaker->visible) {
 628
 629                                 PBD::AngularVector sp = speaker->position;
 630                                 sp.azi += 270.0;
 631                                 CartesianVector c;
 632                                 sp.cartesian (c);
 633                                 cart_to_gtk (c);
 634
 635                                 snprintf (buf, sizeof (buf), "%d", n);
 636
 637                                 /* stroke out a speaker shape */
 638
 639                                 cairo_move_to (cr, c.x, c.y);
 640                                 cairo_save (cr);
 641                                 cairo_rotate (cr, -(sp.azi/360.0) * (2.0 * M_PI));
 642                                 if (xsmall) {
 643                                         cairo_scale (cr, 0.8, 0.8);
 644                                 } else {
 645                                         cairo_scale (cr, 1.2, 1.2);
 646                                 }
 647                                 cairo_rel_line_to (cr, 4, -2);
 648                                 cairo_rel_line_to (cr, 0, -7);
 649                                 cairo_rel_line_to (cr, 5, +5);
 650                                 cairo_rel_line_to (cr, 5, 0);
 651                                 cairo_rel_line_to (cr, 0, 5);
 652                                 cairo_rel_line_to (cr, -5, 0);
 653                                 cairo_rel_line_to (cr, -5, +5);
 654                                 cairo_rel_line_to (cr, 0, -7);
 655                                 cairo_close_path (cr);
 656                                 CSSRGBA(colors.speaker_fill);
 657                                 cairo_fill (cr);
 658                                 cairo_restore (cr);
 659
 660                                 if (!xsmall) {
 661                                         cairo_set_font_size (cr, 16);
 662
 663                                         /* move the text in just a bit */
 664
 665                                         AngularVector textpos (speaker->position.azi + 270.0, speaker->position.ele, 0.85);
 666
 667                                         textpos.cartesian (c);
 668                                         cart_to_gtk (c);
 669                                         cairo_move_to (cr, c.x, c.y);
 670                                         cairo_show_text (cr, buf);
 671                                 }
 672
 673                         }
 674                 }
 675         }
 676
 677         cairo_destroy (cr);
 678
 679         return true;
 680 }
 681
 682 bool
 683 Panner2d::on_button_press_event (GdkEventButton *ev)
 684 {
 685         GdkModifierType state;
 686         int x;
 687         int y;
 688         bool is_signal;
 689
 690         if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
 691                 return false;
 692         }
 693
 694         did_move = false;
 695
 696         switch (ev->button) {
 697         case 1:
 698         case 2:
 699                 x = ev->x - hoffset;
 700                 y = ev->y - voffset;
 701
 702                 if ((drag_target = find_closest_object (x, y, is_signal)) != 0) {
 703                         if (!is_signal) {
 704                                 panner_shell->panner()->set_position (drag_target->position.azi/360.0);
 705                                 drag_target = 0;
 706                         } else {
 707                                 drag_target->set_selected (true);
 708                         }
 709                 }
 710
 711                 state = (GdkModifierType) ev->state;
 712                 return handle_motion (ev->x, ev->y, state);
 713                 break;
 714
 715         default:
 716                 break;
 717         }
 718
 719         return false;
 720 }
 721
 722 bool
 723 Panner2d::on_button_release_event (GdkEventButton *ev)
 724 {
 725         gint x, y;
 726         GdkModifierType state;
 727         bool ret = false;
 728
 729         switch (ev->button) {
 730         case 1:
 731                 x = (int) floor (ev->x);
 732                 y = (int) floor (ev->y);
 733                 state = (GdkModifierType) ev->state;
 734                 ret = handle_motion (x, y, state);
 735                 drag_target = 0;
 736                 break;
 737
 738         case 2:
 739                 x = (int) floor (ev->x);
 740                 y = (int) floor (ev->y);
 741                 state = (GdkModifierType) ev->state;
 742
 743                 if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
 744                         toggle_bypass ();
 745                         ret = true;
 746                 } else {
 747                         ret = handle_motion (x, y, state);
 748                 }
 749
 750                 drag_target = 0;
 751                 break;
 752
 753         case 3:
 754                 break;
 755
 756         }
 757
 758         return ret;
 759 }
 760
 761 gint
 762 Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
 763 {
 764         if (drag_target == 0) {
 765                 return false;
 766         }
 767
 768         if ((state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) == 0) {
 769                 return false;
 770         }
 771
 772         evx -= hoffset;
 773         evy -= voffset;
 774
 775         if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
 776                 CartesianVector c;
 777                 bool need_move = false;
 778
 779                 drag_target->position.cartesian (c);
 780                 cart_to_gtk (c);
 781
 782                 if ((evx != c.x) || (evy != c.y)) {
 783                         need_move = true;
 784                 }
 785
 786                 if (need_move) {
 787                         CartesianVector cp (evx, evy, 0.0);
 788                         AngularVector av;
 789                         gtk_to_cart (cp);
 790
 791                         if (!have_elevation) {
 792                                 clamp_to_circle (cp.x, cp.y);
 793                                 cp.angular (av);
 794                                 av.azi = fmod(270 - av.azi, 360);
 795                                 if (drag_target == &position) {
 796                                         double degree_fract = av.azi / 360.0;
 797                                         panner_shell->panner()->set_position (degree_fract);
 798                                 }
 799                         } else {
 800                                 /* sphere projection */
 801                                 sphere_project (cp.x, cp.y, cp.z);
 802
 803                                 double r2d = 180.0 / M_PI;
 804                                 av.azi = r2d * atan2(cp.y, cp.x);
 805                                 av.ele = r2d * asin(cp.z);
 806                                 av.azi = fmod(270 - av.azi, 360);
 807
 808                                 if (drag_target == &position) {
 809                                         double azi_fract = av.azi / 360.0;
 810                                         double ele_fract = av.ele / 90.0;
 811                                         panner_shell->panner()->set_position (azi_fract);
 812                                         panner_shell->panner()->set_elevation (ele_fract);
 813                                 }
 814                         }
 815                 }
 816         }
 817
 818         return true;
 819 }
 820
 821 bool
 822 Panner2d::on_scroll_event (GdkEventScroll* ev)
 823 {
 824         switch (ev->direction) {
 825         case GDK_SCROLL_UP:
 826         case GDK_SCROLL_RIGHT:
 827                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() - 1.0/360.0);
 828                 break;
 829
 830         case GDK_SCROLL_DOWN:
 831         case GDK_SCROLL_LEFT:
 832                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() + 1.0/360.0);
 833                 break;
 834         }
 835         return true;
 836 }
 837
 838 void
 839 Panner2d::cart_to_gtk (CartesianVector& c) const
 840 {
 841         /* cartesian coordinate space:
 842               center = 0.0
 843               dimension = 2.0 * 2.0
 844               increasing y moves up
 845               so max values along each axis are -1..+1
 846
 847            GTK uses a coordinate space that is:
 848               top left = 0.0
 849               dimension = (radius*2.0) * (radius*2.0)
 850               increasing y moves down
 851         */
 852         const double diameter = radius*2.0;
 853
 854         c.x = diameter * ((c.x + 1.0) / 2.0);
 855         /* extra subtraction inverts the y-axis to match "increasing y moves down" */
 856         c.y = diameter - (diameter * ((c.y + 1.0) / 2.0));
 857 }
 858
 859 void
 860 Panner2d::gtk_to_cart (CartesianVector& c) const
 861 {
 862         const double diameter = radius*2.0;
 863         c.x = ((c.x / diameter) * 2.0) - 1.0;
 864         c.y = (((diameter - c.y) / diameter) * 2.0) - 1.0;
 865 }
 866
 867 void
 868 Panner2d::sphere_project (double& x, double& y, double& z)
 869 {
 870         double r, r2;
 871         r2 = x * x + y * y;
 872         if (r2 < 1.0) {
 873                 z = sqrt (1.0 - r2);
 874         } else {
 875                 r = sqrt (r2);
 876                 x = x / r;
 877                 y = y / r;
 878                 z = 0.0;
 879         }
 880 }
 881
 882 void
 883 Panner2d::clamp_to_circle (double& x, double& y)
 884 {
 885         double azi, ele;
 886         double z = 0.0;
 887         double l;
 888         PBD::cartesian_to_spherical (x, y, z, azi, ele, l);
 889         PBD::spherical_to_cartesian (azi, ele, 1.0, x, y, z);
 890 }
 891
 892 void
 893 Panner2d::toggle_bypass ()
 894 {
 895         panner_shell->set_bypassed (!panner_shell->bypassed());
 896 }
 897
 898 Panner2dWindow::Panner2dWindow (boost::shared_ptr<PannerShell> p, int32_t h, uint32_t inputs)
 899         : ArdourWindow (_("Panner (2D)"))
 900         , widget (p, h)
 901         , bypass_button (_("Bypass"))
 902         , width_adjustment (0, -100, 100, 1, 5, 0)
 903         , width_spinner (width_adjustment)
 904 {
 905         widget.set_name ("MixerPanZone");
 906
 907         set_title (_("Panner"));
 908         widget.set_size_request (h, h);
 909
 910         bypass_button.signal_toggled().connect (sigc::mem_fun (*this, &Panner2dWindow::bypass_toggled));
 911         width_spinner.signal_changed().connect (sigc::mem_fun (*this, &Panner2dWindow::width_changed));
 912
 913         p->Changed.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2dWindow::set_bypassed, this), gui_context());
 914         /* needed for the width-spinbox in the main window */
 915         p->PannableChanged.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2dWindow::pannable_handler, this), gui_context());
 916         p->pannable()->pan_width_control->Changed.connect (panvalue_connections, invalidator(*this), boost::bind (&Panner2dWindow::set_width, this), gui_context());
 917
 918
 919         button_box.set_spacing (6);
 920         button_box.pack_start (bypass_button, false, false);
 921
 922         left_side.set_spacing (6);
 923
 924         left_side.pack_start (button_box, false, false);
 925
 926         Gtk::Label* l = manage (new Label (
 927                                 p->panner()->describe_parameter(PanWidthAutomation),
 928                                 Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false));
 929         spinner_box.pack_start (*l, false, false);
 930         spinner_box.pack_start (width_spinner, false, false);
 931         left_side.pack_start (spinner_box, false, false);
 932
 933         l->show ();
 934         bypass_button.show ();
 935         button_box.show ();
 936         width_spinner.show ();
 937         spinner_box.show ();
 938         left_side.show ();
 939
 940         hpacker.set_spacing (6);
 941         hpacker.set_border_width (12);
 942         hpacker.pack_start (widget, false, false);
 943         hpacker.pack_start (left_side, false, false);
 944         hpacker.show ();
 945
 946         add (hpacker);
 947         reset (inputs);
 948         set_width();
 949         set_bypassed();
 950         widget.show ();
 951 }
 952
 953 void
 954 Panner2dWindow::reset (uint32_t n_inputs)
 955 {
 956         widget.reset (n_inputs);
 957 }
 958
 959 void
 960 Panner2dWindow::bypass_toggled ()
 961 {
 962         bool view = bypass_button.get_active ();
 963         bool model = widget.get_panner_shell()->bypassed ();
 964
 965         if (model != view) {
 966                 widget.get_panner_shell()->set_bypassed (view);
 967         }
 968 }
 969 void
 970 Panner2dWindow::width_changed ()
 971 {
 972         float model = widget.get_panner_shell()->pannable()->pan_width_control->get_value();
 973         float view  = width_spinner.get_value() / 100.0;
 974         if (model != view) {
 975                 widget.get_panner_shell()->panner()->set_width (view);
 976         }
 977 }
 978
 979 void
 980 Panner2dWindow::pannable_handler ()
 981 {
 982         panvalue_connections.drop_connections();
 983         widget.get_panner_shell()->pannable()->pan_width_control->Changed.connect (panvalue_connections, invalidator(*this), boost::bind (&Panner2dWindow::set_width, this), gui_context());
 984         set_width();
 985 }
 986
 987 void
 988 Panner2dWindow::set_bypassed ()
 989 {
 990         bool view = bypass_button.get_active ();
 991         bool model = widget.get_panner_shell()->bypassed ();
 992         if (model != view) {
 993                 bypass_button.set_active(model);
 994         }
 995
 996         set<Evoral::Parameter> params = widget.get_panner_shell()->panner()->what_can_be_automated();
 997         set<Evoral::Parameter>::iterator p = params.find(PanWidthAutomation);
 998         if (p == params.end()) {
 999                 spinner_box.set_sensitive(false);
1000         } else {
1001                 spinner_box.set_sensitive(true);
1002         }
1003 }
1004
1005 void
1006 Panner2dWindow::set_width ()
1007 {
1008         // rounding of spinbox is different from slider -- TODO use slider
1009         float model = (widget.get_panner_shell()->pannable()->pan_width_control->get_value() * 100.0);
1010         float view  = (width_spinner.get_value());
1011         if (model != view) {
1012                 width_spinner.set_value (model);
1013         }
1014 }
1015
1016 bool
1017 Panner2dWindow::on_key_press_event (GdkEventKey* event)
1018 {
1019         return relay_key_press (event, this);
1020 }
1021
1022 bool
1023 Panner2dWindow::on_key_release_event (GdkEventKey*)
1024 {
1025         return true;
1026 }