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