gtk2_ardour/panner2d.cc

   1 /*
   2  * Copyright (C) 2005-2016 Paul Davis <paul@linuxaudiosystems.com>
   3  * Copyright (C) 2005 Taybin Rutkin <taybin@taybin.com>
   4  * Copyright (C) 2008-2011 David Robillard <d@drobilla.net>
   5  * Copyright (C) 2010-2011 Carl Hetherington <carl@carlh.net>
   6  * Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
   7  * Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #include <cmath>
  25 #include <climits>
  26 #include <string.h>
  27
  28 #include <cairo.h>
  29 #include <gtkmm/menu.h>
  30
  31 #include "gtkmm2ext/gtk_ui.h"
  32
  33 #include "pbd/error.h"
  34 #include "pbd/cartesian.h"
  35 #include "ardour/panner.h"
  36 #include "ardour/panner_shell.h"
  37 #include "ardour/pannable.h"
  38 #include "ardour/speakers.h"
  39
  40 #include "gtkmm2ext/colors.h"
  41
  42 #include "panner2d.h"
  43 #include "keyboard.h"
  44 #include "gui_thread.h"
  45 #include "rgb_macros.h"
  46 #include "utils.h"
  47 #include "public_editor.h"
  48 #include "ui_config.h"
  49
  50 #include "pbd/i18n.h"
  51
  52 using namespace std;
  53 using namespace Gtk;
  54 using namespace ARDOUR;
  55 using namespace ARDOUR_UI_UTILS;
  56 using namespace PBD;
  57 using Gtkmm2ext::Keyboard;
  58
  59 Panner2d::ColorScheme Panner2d::colors;
  60 bool Panner2d::have_colors = false;
  61
  62 static const int large_size_threshold = 100;
  63 static const int large_border_width = 25;
  64 static const int small_border_width = 8;
  65
  66 Panner2d::Target::Target (const AngularVector& a, const char *txt)
  67         : position (a)
  68         , text (txt)
  69         , _selected (false)
  70 {
  71 }
  72
  73 Panner2d::Target::~Target ()
  74 {
  75 }
  76
  77 void
  78 Panner2d::Target::set_text (const char* txt)
  79 {
  80         text = txt;
  81 }
  82
  83 Panner2d::Panner2d (boost::shared_ptr<PannerShell> p, int32_t h)
  84 : panner_shell (p)
  85         , position (AngularVector (0.0, 0.0), "")
  86         , width (0)
  87         , height (h)
  88         , last_width (0)
  89         , have_elevation (false)
  90         , _send_mode (false)
  91 {
  92         if (!have_colors) {
  93                 set_colors ();
  94                 have_colors = true;
  95         }
  96
  97         UIConfiguration::instance().ColorsChanged.connect (sigc::mem_fun (*this, &Panner2d::color_handler));
  98
  99         panner_shell->Changed.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2d::handle_state_change, this), gui_context());
 100
 101         panner_shell->panner()->SignalPositionChanged.connect (panner_connections, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
 102
 103         drag_target = 0;
 104         set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
 105
 106         handle_state_change ();
 107         handle_position_change ();
 108 }
 109
 110 Panner2d::~Panner2d()
 111 {
 112         for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
 113                 delete *i;
 114         }
 115         for (Targets::iterator i = signals.begin(); i != signals.end(); ++i) {
 116                 delete *i;
 117         }
 118 }
 119
 120 void
 121 Panner2d::set_colors ()
 122 {
 123         // TODO get all colors from theme, resolve dups
 124         colors.background = UIConfiguration::instance().color ("mono panner bg");
 125         colors.crosshairs =          0x4884a9ff; // 0.282, 0.517, 0.662, 1.0
 126         colors.signalcircle_border = 0x84c5e1ff; // 0.517, 0.772, 0.882, 1.0
 127         colors.signalcircle =        0x4884a9ff; // 0.282, 0.517, 0.662, 1.0  // also used with a = 0.9
 128         colors.diffusion =           0x4884a973; // 0.282, 0.517, 0.662, 0.45
 129         colors.diffusion_inv =       0xff6b6b73; // 1.0,   0.419, 0.419, 0.45
 130         colors.pos_outline =         0xffe7e7d9; // 1.0,   0.905, 0.905, 0.85
 131         colors.pos_fill =            0xff6b6bd9; // 1.0,   0.419, 0.419, 0.85
 132         colors.signal_outline =      0x84c5e1cc; // 0.517, 0.772, 0.882, 0.8
 133         colors.signal_fill =         0x4884a9bf; // 0.282, 0.517, 0.662, 0.75
 134         colors.speaker_fill =        0x4884a9ff; // 0.282, 0.517, 0.662, 1.0
 135         colors.text =                0x84c5e1e6; // 0.517, 0.772, 0.882, 0.9
 136 }
 137
 138 void
 139 Panner2d::color_handler ()
 140 {
 141         set_colors ();
 142         queue_draw ();
 143 }
 144
 145 void
 146 Panner2d::reset (uint32_t n_inputs)
 147 {
 148         uint32_t nouts = panner_shell->panner()->out().n_audio();
 149
 150         /* signals */
 151
 152         while (signals.size() < n_inputs) {
 153                 add_signal ("", AngularVector());
 154         }
 155
 156         if (signals.size() > n_inputs) {
 157                 for (uint32_t i = signals.size(); i < n_inputs; ++i) {
 158                         delete signals[i];
 159                 }
 160
 161                 signals.resize (n_inputs);
 162         }
 163
 164         label_signals ();
 165
 166         for (uint32_t i = 0; i < n_inputs; ++i) {
 167                 signals[i]->position = panner_shell->panner()->signal_position (i);
 168         }
 169
 170         /* add all outputs */
 171
 172         while (speakers.size() < nouts) {
 173                 add_speaker (AngularVector());
 174         }
 175
 176         if (speakers.size() > nouts) {
 177                 for (uint32_t i = nouts; i < speakers.size(); ++i) {
 178                         delete speakers[i];
 179                 }
 180
 181                 speakers.resize (nouts);
 182         }
 183
 184         for (Targets::iterator x = speakers.begin(); x != speakers.end(); ++x) {
 185                 (*x)->visible = false;
 186         }
 187
 188         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 189
 190         for (uint32_t n = 0; n < nouts; ++n) {
 191                 char buf[16];
 192
 193                 snprintf (buf, sizeof (buf), "%d", n+1);
 194                 speakers[n]->set_text (buf);
 195                 speakers[n]->position = the_speakers[n].angles();
 196                 speakers[n]->visible = true;
 197         }
 198
 199         queue_draw ();
 200 }
 201
 202 void
 203 Panner2d::on_size_allocate (Gtk::Allocation& alloc)
 204 {
 205         width = alloc.get_width();
 206         height = alloc.get_height();
 207
 208         if (height > large_size_threshold) {
 209                 border = large_border_width;
 210         } else {
 211                 border = small_border_width;
 212         }
 213
 214         radius = min (width, height);
 215         radius -= border;
 216         radius /= 2;
 217         radius = rint(radius) + .5;
 218
 219         hoffset = max ((double) (width - height), border);
 220         voffset = max ((double) (height - width), border);
 221
 222         hoffset = rint(hoffset / 2.0);
 223         voffset = rint(voffset / 2.0);
 224
 225         DrawingArea::on_size_allocate (alloc);
 226 }
 227
 228 int
 229 Panner2d::add_signal (const char* text, const AngularVector& a)
 230 {
 231         Target* signal = new Target (a, text);
 232         signals.push_back (signal);
 233         signal->visible = true;
 234
 235         return 0;
 236 }
 237
 238 int
 239 Panner2d::add_speaker (const AngularVector& a)
 240 {
 241         Target* speaker = new Target (a, "");
 242         speakers.push_back (speaker);
 243         speaker->visible = true;
 244         queue_draw ();
 245
 246         return speakers.size() - 1;
 247 }
 248
 249 void
 250 Panner2d::handle_state_change ()
 251 {
 252         panner_connections.drop_connections();
 253         if (!panner_shell->panner()) {
 254                 return;
 255         }
 256
 257         panner_shell->panner()->SignalPositionChanged.connect (panner_connections, invalidator(*this), boost::bind (&Panner2d::handle_position_change, this), gui_context());
 258
 259         set<Evoral::Parameter> params = panner_shell->panner()->what_can_be_automated();
 260         set<Evoral::Parameter>::iterator p = params.find(PanElevationAutomation);
 261         bool elev = have_elevation;
 262         have_elevation = (p == params.end()) ? false : true;
 263         if (elev != have_elevation) {
 264                 handle_position_change();
 265         }
 266         queue_draw ();
 267 }
 268
 269 void
 270 Panner2d::label_signals ()
 271 {
 272         uint32_t sz = signals.size();
 273
 274         switch (sz) {
 275                 case 0:
 276                         break;
 277
 278                 case 1:
 279                         signals[0]->set_text ("");
 280                         break;
 281
 282                 case 2:
 283                         signals[0]->set_text (S_("Panner|L"));
 284                         signals[1]->set_text (S_("Panner|R"));
 285                         break;
 286
 287                 default:
 288                         for (uint32_t i = 0; i < sz; ++i) {
 289                                 char buf[64];
 290                                 snprintf (buf, sizeof (buf), "%" PRIu32, i + 1);
 291                                 signals[i]->set_text (buf);
 292                         }
 293                         break;
 294         }
 295 }
 296
 297 void
 298 Panner2d::handle_position_change ()
 299 {
 300         uint32_t n;
 301         double w = panner_shell->pannable()->pan_width_control->get_value();
 302
 303         position.position = AngularVector (panner_shell->pannable()->pan_azimuth_control->get_value() * 360.0,
 304                                            panner_shell->pannable()->pan_elevation_control->get_value() * 90.0);
 305
 306         for (uint32_t i = 0; i < signals.size(); ++i) {
 307                 signals[i]->position = panner_shell->panner()->signal_position (i);
 308         }
 309
 310         if (w * last_width <= 0) {
 311                 /* changed sign */
 312                 label_signals ();
 313         }
 314
 315         last_width = w;
 316
 317         vector<Speaker>& the_speakers (panner_shell->panner()->get_speakers()->speakers());
 318
 319         for (n = 0; n < speakers.size(); ++n) {
 320                 speakers[n]->position = the_speakers[n].angles();
 321         }
 322
 323         queue_draw ();
 324 }
 325
 326 void
 327 Panner2d::move_signal (int which, const AngularVector& a)
 328 {
 329         if (which >= int (speakers.size())) {
 330                 return;
 331         }
 332
 333         speakers[which]->position = a;
 334         queue_draw ();
 335 }
 336
 337 Panner2d::Target *
 338 Panner2d::find_closest_object (gdouble x, gdouble y, bool& is_signal)
 339 {
 340         Target *closest = 0;
 341         Target *candidate;
 342         float distance;
 343         float best_distance = FLT_MAX;
 344         CartesianVector c;
 345
 346         /* start with the position itself */
 347
 348         PBD::AngularVector dp = position.position;
 349         if (!have_elevation) dp.ele = 0;
 350         dp.azi = 270 - dp.azi;
 351         dp.cartesian (c);
 352
 353         cart_to_gtk (c);
 354         best_distance = sqrt ((c.x - x) * (c.x - x) +
 355                         (c.y - y) * (c.y - y));
 356         closest = &position;
 357
 358 #if 0 // TODO signal grab -> change width, not position
 359         for (Targets::const_iterator i = signals.begin(); i != signals.end(); ++i) {
 360                 candidate = *i;
 361
 362                 candidate->position.cartesian (c);
 363                 cart_to_gtk (c);
 364
 365                 distance = sqrt ((c.x - x) * (c.x - x) +
 366                                 (c.y - y) * (c.y - y));
 367
 368                 if (distance < best_distance) {
 369                         closest = candidate;
 370                         best_distance = distance;
 371                 }
 372         }
 373 #endif
 374
 375         is_signal = true;
 376
 377         if (height > large_size_threshold) {
 378                 /* "big" */
 379                 if (best_distance > 30) { // arbitrary
 380                         closest = 0;
 381                 }
 382         } else {
 383                 /* "small" */
 384                 if (best_distance > 10) { // arbitrary
 385                         closest = 0;
 386                 }
 387         }
 388
 389         /* if we didn't find a signal close by, check the speakers */
 390
 391         if (!closest) {
 392                 for (Targets::const_iterator i = speakers.begin(); i != speakers.end(); ++i) {
 393                         candidate = *i;
 394                         PBD::AngularVector sp = candidate->position;
 395                         sp.azi = 270 -sp.azi;
 396                         CartesianVector c;
 397                         sp.cartesian (c);
 398                         cart_to_gtk (c);
 399
 400                         distance = sqrt ((c.x - x) * (c.x - x) +
 401                                         (c.y - y) * (c.y - y));
 402
 403                         if (distance < best_distance) {
 404                                 closest = candidate;
 405                                 best_distance = distance;
 406                         }
 407                 }
 408
 409                 if (height > large_size_threshold) {
 410                         /* "big" */
 411                         if (best_distance < 30) { // arbitrary
 412                                 is_signal = false;
 413                         } else {
 414                                 closest = 0;
 415                         }
 416                 } else {
 417                         /* "small" */
 418                         if (best_distance < 10) { // arbitrary
 419                                 is_signal = false;
 420                         } else {
 421                                 closest = 0;
 422                         }
 423                 }
 424         }
 425
 426         return closest;
 427 }
 428
 429 void
 430 Panner2d::set_send_drawing_mode (bool onoff)
 431 {
 432         if (_send_mode != onoff) {
 433                 _send_mode = onoff;
 434                 queue_draw ();
 435         }
 436 }
 437
 438 bool
 439 Panner2d::on_motion_notify_event (GdkEventMotion *ev)
 440 {
 441         gint x, y;
 442         GdkModifierType state;
 443
 444         if (ev->is_hint) {
 445                 gdk_window_get_pointer (ev->window, &x, &y, &state);
 446         } else {
 447                 x = (int) floor (ev->x);
 448                 y = (int) floor (ev->y);
 449                 state = (GdkModifierType) ev->state;
 450         }
 451
 452         if (ev->state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) {
 453                 did_move = true;
 454         }
 455
 456         return handle_motion (x, y, state);
 457 }
 458
 459 #define CSSRGBA(CL) \
 460         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));
 461
 462 #define CSSRGB(CL, A) \
 463         cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(CL), UINT_RGBA_G_FLT(CL), UINT_RGBA_B_FLT(CL), A);
 464 bool
 465 Panner2d::on_expose_event (GdkEventExpose *event)
 466 {
 467         CartesianVector c;
 468         cairo_t* cr;
 469         bool xsmall = (height <= large_size_threshold);
 470         const double diameter = radius*2.0;
 471
 472         cr = gdk_cairo_create (get_window()->gobj());
 473
 474         /* background */
 475
 476         cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height);
 477
 478         uint32_t bg = colors.background;
 479         if (_send_mode) {
 480                 bg = UIConfiguration::instance().color ("send bg");
 481         }
 482
 483         if (!panner_shell->bypassed()) {
 484                 CSSRGBA(bg);
 485         } else {
 486                 CSSRGB(bg, 0.2);
 487         }
 488         cairo_fill_preserve (cr);
 489         cairo_clip (cr);
 490
 491         /* offset to give us some border */
 492
 493         cairo_translate (cr, hoffset, voffset);
 494
 495         cairo_set_line_width (cr, 1.0);
 496
 497         /* horizontal line of "crosshairs" */
 498
 499         CSSRGBA(colors.crosshairs);
 500         cairo_move_to (cr, 0.0, radius);
 501         cairo_line_to (cr, diameter, radius);
 502         cairo_stroke (cr);
 503
 504         /* vertical line of "crosshairs" */
 505
 506         cairo_move_to (cr, radius, 0);
 507         cairo_line_to (cr, radius, diameter);
 508         cairo_stroke (cr);
 509
 510         /* the circle on which signals live */
 511
 512         cairo_set_line_width (cr, 1.5);
 513         CSSRGBA(colors.signalcircle_border);
 514         cairo_arc (cr, radius, radius, radius, 0.0, 2.0 * M_PI);
 515         cairo_stroke (cr);
 516
 517         for (uint32_t rad = 15; rad < 90; rad += 15) {
 518                 cairo_set_line_width (cr, .5 + (float)rad / 150.0);
 519                 if (rad == 45) {
 520                         CSSRGBA(colors.signalcircle);
 521                 } else {
 522                         CSSRGB(colors.signalcircle, 0.9);
 523                 }
 524                 cairo_new_path (cr);
 525                 cairo_arc (cr, radius, radius, radius * sin(M_PI * (float) rad / 180.0), 0, 2.0 * M_PI);
 526                 cairo_stroke (cr);
 527         }
 528
 529         if (!panner_shell->bypassed()) {
 530                 /* convention top == front ^= azimuth == .5 (same as stereo/mono panners) */
 531
 532                 if (signals.size() > 1) {
 533                         /* arc to show "diffusion" */
 534
 535                         double width_angle = fabs (panner_shell->pannable()->pan_width_control->get_value()) * 2 * M_PI;
 536                         double position_angle = panner_shell->pannable()->pan_azimuth_control->get_value() * 2 * M_PI;
 537
 538                         cairo_save (cr);
 539                         cairo_translate (cr, radius, radius);
 540                         cairo_rotate (cr, M_PI / 2.0);
 541                         cairo_rotate (cr, position_angle - (width_angle/2.0));
 542                         cairo_move_to (cr, 0, 0);
 543                         cairo_arc_negative (cr, 0, 0, radius, width_angle, 0.0);
 544                         cairo_close_path (cr);
 545                         if (panner_shell->pannable()->pan_width_control->get_value() >= 0.0) {
 546                                 /* normal width */
 547                                 CSSRGBA(colors.diffusion);
 548                         } else {
 549                                 /* inverse width */
 550                                 CSSRGBA(colors.diffusion_inv);
 551                         }
 552                         cairo_fill (cr);
 553                         cairo_restore (cr);
 554                 }
 555
 556                 double arc_radius;
 557
 558                 cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 559
 560                 if (xsmall) {
 561                         arc_radius = 4.0;
 562                 } else {
 563                         cairo_set_font_size (cr, 10);
 564                         arc_radius = 12.0;
 565                 }
 566
 567                 /* draw position */
 568
 569                 PBD::AngularVector dp = position.position;
 570                 if (!have_elevation) dp.ele = 0;
 571                 dp.azi = 270 - dp.azi;
 572                 dp.cartesian (c);
 573                 cart_to_gtk (c);
 574
 575                 cairo_new_path (cr);
 576                 cairo_arc (cr, c.x, c.y, arc_radius + 1.0, 0, 2.0 * M_PI);
 577                 CSSRGBA(colors.pos_fill);
 578                 cairo_fill_preserve (cr);
 579                 CSSRGBA(colors.pos_outline);
 580                 cairo_stroke (cr);
 581
 582                 /* signals */
 583
 584                 if (signals.size() > 0) {
 585                         for (Targets::iterator i = signals.begin(); i != signals.end(); ++i) {
 586                                 Target* signal = *i;
 587
 588                                 if (signal->visible) {
 589
 590                                         /* TODO check for overlap - multiple src at same position
 591                                          * -> visualize it properly
 592                                          */
 593                                         PBD::AngularVector sp = signal->position;
 594                                         if (!have_elevation) sp.ele = 0;
 595                                         sp.azi += 270.0;
 596                                         sp.cartesian (c);
 597                                         cart_to_gtk (c);
 598
 599                                         cairo_new_path (cr);
 600                                         cairo_arc (cr, c.x, c.y, arc_radius, 0, 2.0 * M_PI);
 601                                         CSSRGBA(colors.signal_fill);
 602                                         cairo_fill_preserve (cr);
 603                                         CSSRGBA(colors.signal_outline);
 604                                         cairo_stroke (cr);
 605
 606                                         if (!xsmall && !signal->text.empty()) {
 607                                                 CSSRGBA(colors.text);
 608                                                 /* the +/- adjustments are a hack to try to center the text in the circle
 609                                                  * TODO use pango get_pixel_size() -- see mono_panner.cc
 610                                                  */
 611                                                 if (xsmall) {
 612                                                         cairo_move_to (cr, c.x - 1, c.y + 1);
 613                                                 } else {
 614                                                         cairo_move_to (cr, c.x - 4, c.y + 4);
 615                                                 }
 616                                                 cairo_show_text (cr, signal->text.c_str());
 617                                         }
 618                                 }
 619                         }
 620                 }
 621
 622                 /* speakers */
 623
 624                 int n = 0;
 625
 626                 for (Targets::iterator i = speakers.begin(); i != speakers.end(); ++i) {
 627                         Target *speaker = *i;
 628                         char buf[256];
 629                         ++n;
 630
 631                         if (speaker->visible) {
 632
 633                                 PBD::AngularVector sp = speaker->position;
 634                                 sp.azi += 270.0;
 635                                 CartesianVector c;
 636                                 sp.cartesian (c);
 637                                 cart_to_gtk (c);
 638
 639                                 snprintf (buf, sizeof (buf), "%d", n);
 640
 641                                 /* stroke out a speaker shape */
 642
 643                                 cairo_move_to (cr, c.x, c.y);
 644                                 cairo_save (cr);
 645                                 cairo_rotate (cr, -(sp.azi/360.0) * (2.0 * M_PI));
 646                                 if (xsmall) {
 647                                         cairo_scale (cr, 0.8, 0.8);
 648                                 } else {
 649                                         cairo_scale (cr, 1.2, 1.2);
 650                                 }
 651                                 cairo_rel_line_to (cr, 4, -2);
 652                                 cairo_rel_line_to (cr, 0, -7);
 653                                 cairo_rel_line_to (cr, 5, +5);
 654                                 cairo_rel_line_to (cr, 5, 0);
 655                                 cairo_rel_line_to (cr, 0, 5);
 656                                 cairo_rel_line_to (cr, -5, 0);
 657                                 cairo_rel_line_to (cr, -5, +5);
 658                                 cairo_rel_line_to (cr, 0, -7);
 659                                 cairo_close_path (cr);
 660                                 CSSRGBA(colors.speaker_fill);
 661                                 cairo_fill (cr);
 662                                 cairo_restore (cr);
 663
 664                                 if (!xsmall) {
 665                                         cairo_set_font_size (cr, 16);
 666
 667                                         /* move the text in just a bit */
 668
 669                                         AngularVector textpos (speaker->position.azi + 270.0, speaker->position.ele, 0.85);
 670
 671                                         textpos.cartesian (c);
 672                                         cart_to_gtk (c);
 673                                         cairo_move_to (cr, c.x, c.y);
 674                                         cairo_show_text (cr, buf);
 675                                 }
 676
 677                         }
 678                 }
 679         }
 680
 681         cairo_destroy (cr);
 682
 683         return true;
 684 }
 685
 686 bool
 687 Panner2d::on_button_press_event (GdkEventButton *ev)
 688 {
 689         GdkModifierType state;
 690         int x;
 691         int y;
 692         bool is_signal;
 693
 694         if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
 695                 return false;
 696         }
 697
 698         did_move = false;
 699
 700         switch (ev->button) {
 701         case 1:
 702         case 2:
 703                 x = ev->x - hoffset;
 704                 y = ev->y - voffset;
 705
 706                 if ((drag_target = find_closest_object (x, y, is_signal)) != 0) {
 707                         if (!is_signal) {
 708                                 panner_shell->panner()->set_position (drag_target->position.azi/360.0);
 709                                 drag_target = 0;
 710                         } else {
 711                                 drag_target->set_selected (true);
 712                         }
 713                 }
 714
 715                 state = (GdkModifierType) ev->state;
 716                 return handle_motion (ev->x, ev->y, state);
 717                 break;
 718
 719         default:
 720                 break;
 721         }
 722
 723         return false;
 724 }
 725
 726 bool
 727 Panner2d::on_button_release_event (GdkEventButton *ev)
 728 {
 729         gint x, y;
 730         GdkModifierType state;
 731         bool ret = false;
 732
 733         switch (ev->button) {
 734         case 1:
 735                 x = (int) floor (ev->x);
 736                 y = (int) floor (ev->y);
 737                 state = (GdkModifierType) ev->state;
 738                 ret = handle_motion (x, y, state);
 739                 drag_target = 0;
 740                 break;
 741
 742         case 2:
 743                 x = (int) floor (ev->x);
 744                 y = (int) floor (ev->y);
 745                 state = (GdkModifierType) ev->state;
 746
 747                 if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
 748                         toggle_bypass ();
 749                         ret = true;
 750                 } else {
 751                         ret = handle_motion (x, y, state);
 752                 }
 753
 754                 drag_target = 0;
 755                 break;
 756
 757         case 3:
 758                 break;
 759
 760         }
 761
 762         return ret;
 763 }
 764
 765 gint
 766 Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
 767 {
 768         if (drag_target == 0) {
 769                 return false;
 770         }
 771
 772         if ((state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) == 0) {
 773                 return false;
 774         }
 775
 776         evx -= hoffset;
 777         evy -= voffset;
 778
 779         if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
 780                 CartesianVector c;
 781                 bool need_move = false;
 782
 783                 drag_target->position.cartesian (c);
 784                 cart_to_gtk (c);
 785
 786                 if ((evx != c.x) || (evy != c.y)) {
 787                         need_move = true;
 788                 }
 789
 790                 if (need_move) {
 791                         CartesianVector cp (evx, evy, 0.0);
 792                         AngularVector av;
 793                         gtk_to_cart (cp);
 794
 795                         if (!have_elevation) {
 796                                 clamp_to_circle (cp.x, cp.y);
 797                                 cp.angular (av);
 798                                 av.azi = fmod(270 - av.azi, 360);
 799                                 if (drag_target == &position) {
 800                                         double degree_fract = av.azi / 360.0;
 801                                         panner_shell->panner()->set_position (degree_fract);
 802                                 }
 803                         } else {
 804                                 /* sphere projection */
 805                                 sphere_project (cp.x, cp.y, cp.z);
 806
 807                                 double r2d = 180.0 / M_PI;
 808                                 av.azi = r2d * atan2(cp.y, cp.x);
 809                                 av.ele = r2d * asin(cp.z);
 810                                 av.azi = fmod(270 - av.azi, 360);
 811
 812                                 if (drag_target == &position) {
 813                                         double azi_fract = av.azi / 360.0;
 814                                         double ele_fract = av.ele / 90.0;
 815                                         panner_shell->panner()->set_position (azi_fract);
 816                                         panner_shell->panner()->set_elevation (ele_fract);
 817                                 }
 818                         }
 819                 }
 820         }
 821
 822         return true;
 823 }
 824
 825 bool
 826 Panner2d::on_scroll_event (GdkEventScroll* ev)
 827 {
 828         switch (ev->direction) {
 829         case GDK_SCROLL_UP:
 830         case GDK_SCROLL_RIGHT:
 831                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() - 1.0/360.0);
 832                 break;
 833
 834         case GDK_SCROLL_DOWN:
 835         case GDK_SCROLL_LEFT:
 836                 panner_shell->panner()->set_position (panner_shell->pannable()->pan_azimuth_control->get_value() + 1.0/360.0);
 837                 break;
 838         }
 839         return true;
 840 }
 841
 842 void
 843 Panner2d::cart_to_gtk (CartesianVector& c) const
 844 {
 845         /* cartesian coordinate space:
 846          *  center = 0.0
 847          *  dimension = 2.0 * 2.0
 848          *  increasing y moves up
 849          * so max values along each axis are -1..+1
 850          *
 851          * GTK uses a coordinate space that is:
 852          *  top left = 0.0
 853          *  dimension = (radius*2.0) * (radius*2.0)
 854          * increasing y moves down
 855         */
 856         const double diameter = radius*2.0;
 857
 858         c.x = diameter * ((c.x + 1.0) / 2.0);
 859         /* extra subtraction inverts the y-axis to match "increasing y moves down" */
 860         c.y = diameter - (diameter * ((c.y + 1.0) / 2.0));
 861 }
 862
 863 void
 864 Panner2d::gtk_to_cart (CartesianVector& c) const
 865 {
 866         const double diameter = radius*2.0;
 867         c.x = ((c.x / diameter) * 2.0) - 1.0;
 868         c.y = (((diameter - c.y) / diameter) * 2.0) - 1.0;
 869 }
 870
 871 void
 872 Panner2d::sphere_project (double& x, double& y, double& z)
 873 {
 874         double r, r2;
 875         r2 = x * x + y * y;
 876         if (r2 < 1.0) {
 877                 z = sqrt (1.0 - r2);
 878         } else {
 879                 r = sqrt (r2);
 880                 x = x / r;
 881                 y = y / r;
 882                 z = 0.0;
 883         }
 884 }
 885
 886 void
 887 Panner2d::clamp_to_circle (double& x, double& y)
 888 {
 889         double azi, ele;
 890         double z = 0.0;
 891         double l;
 892         PBD::cartesian_to_spherical (x, y, z, azi, ele, l);
 893         PBD::spherical_to_cartesian (azi, ele, 1.0, x, y, z);
 894 }
 895
 896 void
 897 Panner2d::toggle_bypass ()
 898 {
 899         panner_shell->set_bypassed (!panner_shell->bypassed());
 900 }
 901
 902 Panner2dWindow::Panner2dWindow (boost::shared_ptr<PannerShell> p, int32_t h, uint32_t inputs)
 903         : ArdourWindow (_("Panner (2D)"))
 904         , widget (p, h)
 905         , bypass_button (_("Bypass"))
 906         , width_adjustment (0, -100, 100, 1, 5, 0)
 907         , width_spinner (width_adjustment)
 908 {
 909         widget.set_name ("MixerPanZone");
 910
 911         set_title (_("Panner"));
 912         widget.set_size_request (h, h);
 913
 914         bypass_button.signal_toggled().connect (sigc::mem_fun (*this, &Panner2dWindow::bypass_toggled));
 915         width_spinner.signal_changed().connect (sigc::mem_fun (*this, &Panner2dWindow::width_changed));
 916
 917         p->Changed.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2dWindow::set_bypassed, this), gui_context());
 918         /* needed for the width-spinbox in the main window */
 919         p->PannableChanged.connect (panshell_connections, invalidator (*this), boost::bind (&Panner2dWindow::pannable_handler, this), gui_context());
 920         p->pannable()->pan_width_control->Changed.connect (panvalue_connections, invalidator(*this), boost::bind (&Panner2dWindow::set_width, this), gui_context());
 921
 922
 923         button_box.set_spacing (6);
 924         button_box.pack_start (bypass_button, false, false);
 925
 926         left_side.set_spacing (6);
 927
 928         left_side.pack_start (button_box, false, false);
 929
 930         Gtk::Label* l = manage (new Label (
 931                                 p->panner()->describe_parameter(PanWidthAutomation),
 932                                 Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false));
 933         spinner_box.pack_start (*l, false, false);
 934         spinner_box.pack_start (width_spinner, false, false);
 935         left_side.pack_start (spinner_box, false, false);
 936
 937         l->show ();
 938         bypass_button.show ();
 939         button_box.show ();
 940         width_spinner.show ();
 941         spinner_box.show ();
 942         left_side.show ();
 943
 944         hpacker.set_spacing (6);
 945         hpacker.set_border_width (12);
 946         hpacker.pack_start (widget, false, false);
 947         hpacker.pack_start (left_side, false, false);
 948         hpacker.show ();
 949
 950         add (hpacker);
 951         reset (inputs);
 952         set_width();
 953         set_bypassed();
 954         widget.show ();
 955 }
 956
 957 void
 958 Panner2dWindow::reset (uint32_t n_inputs)
 959 {
 960         widget.reset (n_inputs);
 961 }
 962
 963 void
 964 Panner2dWindow::bypass_toggled ()
 965 {
 966         bool view = bypass_button.get_active ();
 967         bool model = widget.get_panner_shell()->bypassed ();
 968
 969         if (model != view) {
 970                 widget.get_panner_shell()->set_bypassed (view);
 971         }
 972 }
 973 void
 974 Panner2dWindow::width_changed ()
 975 {
 976         float model = widget.get_panner_shell()->pannable()->pan_width_control->get_value();
 977         float view  = width_spinner.get_value() / 100.0;
 978         if (model != view) {
 979                 widget.get_panner_shell()->panner()->set_width (view);
 980         }
 981 }
 982
 983 void
 984 Panner2dWindow::pannable_handler ()
 985 {
 986         panvalue_connections.drop_connections();
 987         widget.get_panner_shell()->pannable()->pan_width_control->Changed.connect (panvalue_connections, invalidator(*this), boost::bind (&Panner2dWindow::set_width, this), gui_context());
 988         set_width();
 989 }
 990
 991 void
 992 Panner2dWindow::set_bypassed ()
 993 {
 994         bool view = bypass_button.get_active ();
 995         bool model = widget.get_panner_shell()->bypassed ();
 996         if (model != view) {
 997                 bypass_button.set_active(model);
 998         }
 999
1000         set<Evoral::Parameter> params = widget.get_panner_shell()->panner()->what_can_be_automated();
1001         set<Evoral::Parameter>::iterator p = params.find(PanWidthAutomation);
1002         if (p == params.end()) {
1003                 spinner_box.set_sensitive(false);
1004         } else {
1005                 spinner_box.set_sensitive(true);
1006         }
1007 }
1008
1009 void
1010 Panner2dWindow::set_width ()
1011 {
1012         // rounding of spinbox is different from slider -- TODO use slider
1013         float model = (widget.get_panner_shell()->pannable()->pan_width_control->get_value() * 100.0);
1014         float view  = (width_spinner.get_value());
1015         if (model != view) {
1016                 width_spinner.set_value (model);
1017         }
1018 }
1019
1020 bool
1021 Panner2dWindow::on_key_press_event (GdkEventKey* event)
1022 {
1023         return relay_key_press (event, this);
1024 }
1025
1026 bool
1027 Panner2dWindow::on_key_release_event (GdkEventKey*)
1028 {
1029         return true;
1030 }