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