gtk2_ardour/speaker_dialog.cc

   1 /*
   2     Copyright (C) 2011 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 "pbd/cartesian.h"
  21
  22 #include "gtkmm2ext/keyboard.h"
  23
  24 #include "speaker_dialog.h"
  25
  26 #include "i18n.h"
  27
  28 using namespace ARDOUR;
  29 using namespace PBD;
  30 using namespace std;
  31 using namespace Gtk;
  32 using namespace Gtkmm2ext;
  33
  34 SpeakerDialog::SpeakerDialog ()
  35         : ArdourDialog (_("Speaker Configuration"))
  36         , aspect_frame ("", 0.5, 0.5, 1.0, false)
  37         , azimuth_adjustment (0, 0.0, 360.0, 10.0, 1.0)
  38         , azimuth_spinner (azimuth_adjustment)
  39         , add_speaker_button (_("Add Speaker"))
  40         , use_system_button (_("Use System"))
  41
  42 {
  43
  44         side_vbox.set_homogeneous (false);
  45         side_vbox.set_border_width (9);
  46         side_vbox.set_spacing (6);
  47         side_vbox.pack_start (azimuth_spinner, false, false);
  48         side_vbox.pack_start (add_speaker_button, false, false);
  49         side_vbox.pack_start (use_system_button, false, false);
  50
  51         aspect_frame.set_size_request (200, 200);
  52         aspect_frame.set_shadow_type (SHADOW_NONE);
  53         aspect_frame.add (darea);
  54
  55         hbox.set_spacing (6);
  56         hbox.set_border_width (6);
  57         hbox.pack_start (aspect_frame, true, true);
  58         hbox.pack_start (side_vbox, false, false);
  59
  60         get_vbox()->pack_start (hbox);
  61         get_vbox()->show_all ();
  62
  63         darea.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
  64
  65         darea.signal_size_allocate().connect (sigc::mem_fun (*this, &SpeakerDialog::darea_size_allocate));
  66         darea.signal_expose_event().connect (sigc::mem_fun (*this, &SpeakerDialog::darea_expose_event));
  67         darea.signal_button_press_event().connect (sigc::mem_fun (*this, &SpeakerDialog::darea_button_press_event));
  68         darea.signal_button_release_event().connect (sigc::mem_fun (*this, &SpeakerDialog::darea_button_release_event));
  69         darea.signal_motion_notify_event().connect (sigc::mem_fun (*this, &SpeakerDialog::darea_motion_notify_event));
  70
  71         drag_index = -1;
  72 }
  73
  74 void
  75 SpeakerDialog::set_speakers (boost::shared_ptr<Speakers> s)
  76 {
  77         speakers = *s;
  78 }
  79
  80 Speakers
  81 SpeakerDialog::get_speakers () const
  82 {
  83         return speakers;
  84 }
  85
  86 bool
  87 SpeakerDialog::darea_expose_event (GdkEventExpose* event)
  88 {
  89         gint x, y;
  90         cairo_t* cr;
  91
  92         cr = gdk_cairo_create (darea.get_window()->gobj());
  93
  94         cairo_set_line_width (cr, 1.0);
  95
  96         cairo_rectangle (cr, event->area.x, event->area.y, event->area.width, event->area.height);
  97         cairo_set_source_rgba (cr, 0.1, 0.1, 0.1, 1.0);
  98         cairo_fill_preserve (cr);
  99         cairo_clip (cr);
 100
 101         if (height > 100) {
 102                 cairo_translate (cr, 10.0, 10.0);
 103         }
 104
 105         /* horizontal line of "crosshairs" */
 106
 107         cairo_set_source_rgb (cr, 0.0, 0.1, 0.7);
 108         cairo_move_to (cr, 0.5, height/2.0+0.5);
 109         cairo_line_to (cr, width+0.5, height/2+0.5);
 110         cairo_stroke (cr);
 111
 112         /* vertical line of "crosshairs" */
 113
 114         cairo_move_to (cr, width/2+0.5, 0.5);
 115         cairo_line_to (cr, width/2+0.5, height+0.5);
 116         cairo_stroke (cr);
 117
 118         /* the circle on which signals live */
 119
 120         cairo_arc (cr, width/2, height/2, height/2, 0, 2.0 * M_PI);
 121         cairo_stroke (cr);
 122
 123         float arc_radius;
 124
 125         cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 126
 127         if (height < 100) {
 128                 cairo_set_font_size (cr, 10);
 129                 arc_radius = 2.0;
 130         } else {
 131                 cairo_set_font_size (cr, 16);
 132                 arc_radius = 4.0;
 133         }
 134
 135         uint32_t n = 0;
 136         for (vector<Speaker>::iterator i = speakers.speakers().begin(); i != speakers.speakers().end(); ++i) {
 137
 138                 Speaker& s (*i);
 139                 CartesianVector c (s.coords());
 140
 141                 cart_to_gtk (c);
 142
 143                 x = (gint) floor (c.x);
 144                 y = (gint) floor (c.y);
 145
 146                 /* XXX need to shift circles so that they are centered on the circle */
 147
 148                 cairo_arc (cr, x, y, arc_radius, 0, 2.0 * M_PI);
 149                 cairo_set_source_rgb (cr, 0.8, 0.2, 0.1);
 150                 cairo_close_path (cr);
 151                 cairo_fill (cr);
 152
 153                 cairo_move_to (cr, x + 6, y + 6);
 154
 155                 char buf[256];
 156                 snprintf (buf, sizeof (buf), "%d:%d", n+1, (int) lrint (s.angles().azi));
 157                 cairo_show_text (cr, buf);
 158                 ++n;
 159         }
 160
 161         cairo_destroy (cr);
 162
 163         return true;
 164
 165 }
 166
 167 void
 168 SpeakerDialog::cart_to_gtk (CartesianVector& c) const
 169 {
 170         /* "c" uses a coordinate space that is:
 171
 172            center = 0.0
 173            dimension = 2.0 * 2.0
 174            so max values along each axis are -1..+1
 175
 176            GTK uses a coordinate space that is:
 177
 178            top left = 0.0
 179            dimension = width * height
 180            so max values along each axis are 0,width and
 181            0,height
 182         */
 183
 184         c.x = (width / 2) * (c.x + 1);
 185         c.y = (height / 2) * (1 - c.y);
 186
 187         /* XXX z-axis not handled - 2D for now */
 188 }
 189
 190 void
 191 SpeakerDialog::gtk_to_cart (CartesianVector& c) const
 192 {
 193         c.x = (c.x / (width / 2.0)) - 1.0;
 194         c.y = -((c.y / (height / 2.0)) - 1.0);
 195
 196         /* XXX z-axis not handled - 2D for now */
 197 }
 198
 199 void
 200 SpeakerDialog::clamp_to_circle (double& x, double& y)
 201 {
 202         double azi, ele;
 203         double z = 0.0;
 204         double l;
 205
 206         PBD::cartesian_to_spherical (x, y, z, azi, ele, l);
 207         PBD::spherical_to_cartesian (azi, ele, 1.0, x, y, z);
 208 }
 209
 210 void
 211 SpeakerDialog::darea_size_allocate (Gtk::Allocation& alloc)
 212 {
 213         width = alloc.get_width();
 214         height = alloc.get_height();
 215
 216         if (height > 100) {
 217                 width -= 20;
 218                 height -= 20;
 219         }
 220 }
 221
 222 bool
 223 SpeakerDialog::darea_button_press_event (GdkEventButton *ev)
 224 {
 225         GdkModifierType state;
 226
 227         if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
 228                 return false;
 229         }
 230
 231         drag_index = -1;
 232
 233         switch (ev->button) {
 234         case 1:
 235         case 2:
 236                 drag_index = find_closest_object (ev->x, ev->y);
 237                 drag_x = (int) floor (ev->x);
 238                 drag_y = (int) floor (ev->y);
 239                 state = (GdkModifierType) ev->state;
 240
 241                 return handle_motion (drag_x, drag_y, state);
 242                 break;
 243
 244         default:
 245                 break;
 246         }
 247
 248         return false;
 249 }
 250
 251 bool
 252 SpeakerDialog::darea_button_release_event (GdkEventButton *ev)
 253 {
 254         gint x, y;
 255         GdkModifierType state;
 256         bool ret = false;
 257
 258         switch (ev->button) {
 259         case 1:
 260                 x = (int) floor (ev->x);
 261                 y = (int) floor (ev->y);
 262                 state = (GdkModifierType) ev->state;
 263
 264                 if (Keyboard::modifier_state_contains (state, Keyboard::TertiaryModifier)) {
 265
 266                         for (vector<Speaker>::iterator i = speakers.speakers().begin(); i != speakers.speakers().end(); ++i) {
 267                                 /* XXX DO SOMETHING TO SET SPEAKER BACK TO "normal" */
 268                         }
 269
 270                         queue_draw ();
 271                         ret = true;
 272
 273                 } else {
 274                         ret = handle_motion (x, y, state);
 275                 }
 276
 277                 break;
 278
 279         case 2:
 280                 x = (int) floor (ev->x);
 281                 y = (int) floor (ev->y);
 282                 state = (GdkModifierType) ev->state;
 283
 284                 ret = handle_motion (x, y, state);
 285                 break;
 286
 287         case 3:
 288                 break;
 289
 290         }
 291
 292         drag_index = -1;
 293
 294         return ret;
 295 }
 296
 297 int
 298 SpeakerDialog::find_closest_object (gdouble x, gdouble y)
 299 {
 300         float distance;
 301         float best_distance = FLT_MAX;
 302         int n = 0;
 303         int which = -1;
 304
 305         for (vector<Speaker>::iterator i = speakers.speakers().begin(); i != speakers.speakers().end(); ++i, ++n) {
 306
 307                 Speaker& candidate (*i);
 308                 CartesianVector c;
 309
 310                 candidate.angles().cartesian (c);
 311                 cart_to_gtk (c);
 312
 313                 distance = sqrt ((c.x - x) * (c.x - x) +
 314                                  (c.y - y) * (c.y - y));
 315
 316
 317                 if (distance < best_distance) {
 318                         best_distance = distance;
 319                         which = n;
 320                 }
 321         }
 322
 323         if (best_distance > 20) { // arbitrary
 324                 return -1;
 325         }
 326
 327         return which;
 328 }
 329
 330 bool
 331 SpeakerDialog::darea_motion_notify_event (GdkEventMotion *ev)
 332 {
 333         gint x, y;
 334         GdkModifierType state;
 335
 336         if (ev->is_hint) {
 337                 gdk_window_get_pointer (ev->window, &x, &y, &state);
 338         } else {
 339                 x = (int) floor (ev->x);
 340                 y = (int) floor (ev->y);
 341                 state = (GdkModifierType) ev->state;
 342         }
 343
 344         return handle_motion (x, y, state);
 345 }
 346
 347 bool
 348 SpeakerDialog::handle_motion (gint evx, gint evy, GdkModifierType state)
 349 {
 350         if (drag_index < 0) {
 351                 return false;
 352         }
 353
 354         if ((state & (GDK_BUTTON1_MASK|GDK_BUTTON2_MASK)) == 0) {
 355                 return false;
 356         }
 357
 358
 359         if (state & GDK_BUTTON1_MASK && !(state & GDK_BUTTON2_MASK)) {
 360                 CartesianVector c;
 361                 bool need_move = false;
 362                 Speaker& moving (speakers.speakers()[drag_index]);
 363
 364                 moving.angles().cartesian (c);
 365                 cart_to_gtk (c);
 366
 367                 if ((evx != c.x) || (evy != c.y)) {
 368                         need_move = true;
 369                 }
 370
 371                 if (need_move) {
 372                         CartesianVector cp (evx, evy, 0.0);
 373
 374                         /* canonicalize position */
 375
 376                         gtk_to_cart (cp);
 377
 378                         /* position actual signal on circle */
 379
 380                         clamp_to_circle (cp.x, cp.y);
 381
 382                         /* generate an angular representation and set drag target (GUI) position */
 383
 384                         AngularVector a;
 385
 386                         cp.angular (a);
 387
 388                         moving.move (a);
 389
 390                         queue_draw ();
 391                 }
 392         }
 393
 394         return true;
 395 }