src/unix/joystick.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/unix/joystick.cpp
   3 // Purpose:     wxJoystick class
   4 // Author:      Ported to Linux by Guilhem Lavaux
   5 // Modified by:
   6 // Created:     05/23/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // for compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_JOYSTICK
  16
  17 #include "wx/joystick.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/event.h"
  21     #include "wx/window.h"
  22 #endif //WX_PRECOMP
  23
  24 #include <linux/joystick.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <sys/time.h>
  28 #include <sys/ioctl.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31
  32 #include "wx/unix/private.h"
  33
  34 enum {
  35     wxJS_AXIS_X = 0,
  36     wxJS_AXIS_Y,
  37     wxJS_AXIS_Z,
  38     wxJS_AXIS_RUDDER,
  39     wxJS_AXIS_U,
  40     wxJS_AXIS_V,
  41
  42     wxJS_AXIS_MAX = 32767,
  43     wxJS_AXIS_MIN = -32767
  44 };
  45
  46
  47 IMPLEMENT_DYNAMIC_CLASS(wxJoystick, wxObject)
  48
  49
  50 ////////////////////////////////////////////////////////////////////////////
  51 // Background thread for reading the joystick device
  52 ////////////////////////////////////////////////////////////////////////////
  53
  54 class wxJoystickThread : public wxThread
  55 {
  56 public:
  57     wxJoystickThread(int device, int joystick);
  58     void* Entry();
  59
  60 private:
  61     int       m_device;
  62     int       m_joystick;
  63     wxPoint   m_lastposition;
  64     int       m_axe[15];
  65     int       m_buttons;
  66     wxWindow* m_catchwin;
  67     int       m_polling;
  68
  69     friend class wxJoystick;
  70 };
  71
  72
  73 wxJoystickThread::wxJoystickThread(int device, int joystick)
  74     : m_device(device),
  75       m_joystick(joystick),
  76       m_lastposition(wxDefaultPosition),
  77       m_buttons(0),
  78       m_catchwin(NULL),
  79       m_polling(0)
  80 {
  81     for (int i=0; i<15; i++)
  82         m_axe[i] = 0;
  83 }
  84
  85
  86 void* wxJoystickThread::Entry()
  87 {
  88     struct js_event j_evt;
  89     fd_set read_fds;
  90     struct timeval time_out = {0, 0};
  91
  92     wxFD_ZERO(&read_fds);
  93     while (true)
  94     {
  95         if (TestDestroy())
  96             break;
  97
  98         // We use select when either polling or 'blocking' as even in the
  99         // blocking case we need to check TestDestroy periodically
 100         if (m_polling)
 101             time_out.tv_usec = m_polling * 1000;
 102         else
 103             time_out.tv_usec = 10 * 1000; // check at least every 10 msec in blocking case
 104
 105         wxFD_SET(m_device, &read_fds);
 106         select(m_device+1, &read_fds, NULL, NULL, &time_out);
 107         if (wxFD_ISSET(m_device, &read_fds))
 108         {
 109             memset(&j_evt, 0, sizeof(j_evt));
 110             read(m_device, &j_evt, sizeof(j_evt));
 111
 112             //printf("time: %d\t value: %d\t type: %d\t number: %d\n",
 113             //       j_evt.time, j_evt.value, j_evt.type, j_evt.number);
 114
 115             wxJoystickEvent jwx_event;
 116
 117             if (j_evt.type & JS_EVENT_AXIS)
 118             {
 119                 m_axe[j_evt.number] = j_evt.value;
 120
 121                 switch (j_evt.number)
 122                 {
 123                     case wxJS_AXIS_X:
 124                         m_lastposition.x = j_evt.value;
 125                         jwx_event.SetEventType(wxEVT_JOY_MOVE);
 126                         break;
 127                     case wxJS_AXIS_Y:
 128                         m_lastposition.y = j_evt.value;
 129                         jwx_event.SetEventType(wxEVT_JOY_MOVE);
 130                         break;
 131                     case wxJS_AXIS_Z:
 132                         jwx_event.SetEventType(wxEVT_JOY_ZMOVE);
 133                         break;
 134                     default:
 135                         jwx_event.SetEventType(wxEVT_JOY_MOVE);
 136                         // TODO: There should be a way to indicate that the event
 137                         //       is for some other axes.
 138                         break;
 139                 }
 140             }
 141
 142             if (j_evt.type & JS_EVENT_BUTTON)
 143             {
 144                 if (j_evt.value)
 145                 {
 146                     m_buttons |= (1 << j_evt.number);
 147                     jwx_event.SetEventType(wxEVT_JOY_BUTTON_DOWN);
 148                 }
 149                 else
 150                 {
 151                     m_buttons &= ~(1 << j_evt.number);
 152                     jwx_event.SetEventType(wxEVT_JOY_BUTTON_UP);
 153                 }
 154
 155                 jwx_event.SetButtonChange(j_evt.number);
 156
 157                 jwx_event.SetTimestamp(j_evt.time);
 158                 jwx_event.SetJoystick(m_joystick);
 159                 jwx_event.SetButtonState(m_buttons);
 160                 jwx_event.SetPosition(m_lastposition);
 161                 jwx_event.SetZPosition(m_axe[3]);
 162                 jwx_event.SetEventObject(m_catchwin);
 163
 164                 if (m_catchwin)
 165                     m_catchwin->AddPendingEvent(jwx_event);
 166             }
 167         }
 168     }
 169
 170     close(m_device);
 171     return NULL;
 172 }
 173
 174
 175 ////////////////////////////////////////////////////////////////////////////
 176
 177 wxJoystick::wxJoystick(int joystick)
 178     : m_device(-1),
 179       m_joystick(joystick),
 180       m_thread(NULL)
 181 {
 182     wxString dev_name;
 183
 184      // old /dev structure
 185     dev_name.Printf( wxT("/dev/js%d"), joystick);
 186     m_device = open(dev_name.fn_str(), O_RDONLY);
 187
 188     // new /dev structure with "input" subdirectory
 189     if (m_device == -1)
 190     {
 191         dev_name.Printf( wxT("/dev/input/js%d"), joystick);
 192         m_device = open(dev_name.fn_str(), O_RDONLY);
 193     }
 194
 195     if (m_device != -1)
 196     {
 197         m_thread = new wxJoystickThread(m_device, m_joystick);
 198         m_thread->Create();
 199         m_thread->Run();
 200     }
 201 }
 202
 203
 204 wxJoystick::~wxJoystick()
 205 {
 206     ReleaseCapture();
 207     if (m_thread)
 208         m_thread->Delete();  // It's detached so it will delete itself
 209     m_device = -1;
 210 }
 211
 212
 213 ////////////////////////////////////////////////////////////////////////////
 214 // State
 215 ////////////////////////////////////////////////////////////////////////////
 216
 217 wxPoint wxJoystick::GetPosition() const
 218 {
 219     wxPoint pos(wxDefaultPosition);
 220     if (m_thread) pos = m_thread->m_lastposition;
 221     return pos;
 222 }
 223
 224 int wxJoystick::GetZPosition() const
 225 {
 226     if (m_thread)
 227         return m_thread->m_axe[wxJS_AXIS_Z];
 228     return 0;
 229 }
 230
 231 int wxJoystick::GetButtonState() const
 232 {
 233     if (m_thread)
 234         return m_thread->m_buttons;
 235     return 0;
 236 }
 237
 238 int wxJoystick::GetPOVPosition() const
 239 {
 240     return -1;
 241 }
 242
 243 int wxJoystick::GetPOVCTSPosition() const
 244 {
 245     return -1;
 246 }
 247
 248 int wxJoystick::GetRudderPosition() const
 249 {
 250     if (m_thread)
 251         return m_thread->m_axe[wxJS_AXIS_RUDDER];
 252     return 0;
 253 }
 254
 255 int wxJoystick::GetUPosition() const
 256 {
 257     if (m_thread)
 258         return m_thread->m_axe[wxJS_AXIS_U];
 259     return 0;
 260 }
 261
 262 int wxJoystick::GetVPosition() const
 263 {
 264     if (m_thread)
 265         return m_thread->m_axe[wxJS_AXIS_V];
 266     return 0;
 267 }
 268
 269 int wxJoystick::GetMovementThreshold() const
 270 {
 271     return 0;
 272 }
 273
 274 void wxJoystick::SetMovementThreshold(int threshold)
 275 {
 276 }
 277
 278 ////////////////////////////////////////////////////////////////////////////
 279 // Capabilities
 280 ////////////////////////////////////////////////////////////////////////////
 281
 282 bool wxJoystick::IsOk() const
 283 {
 284     return (m_device != -1);
 285 }
 286
 287 int wxJoystick::GetNumberJoysticks()
 288 {
 289     wxString dev_name;
 290     int fd, j;
 291
 292     for (j=0; j<4; j++) {
 293         dev_name.Printf(wxT("/dev/js%d"), j);
 294         fd = open(dev_name.fn_str(), O_RDONLY);
 295         if (fd == -1)
 296             break;
 297         close(fd);
 298     }
 299
 300     if (j == 0) {
 301         for (j=0; j<4; j++) {
 302             dev_name.Printf(wxT("/dev/input/js%d"), j);
 303             fd = open(dev_name.fn_str(), O_RDONLY);
 304             if (fd == -1)
 305                 return j;
 306             close(fd);
 307         }
 308     }
 309
 310     return j;
 311 }
 312
 313 int wxJoystick::GetManufacturerId() const
 314 {
 315     return 0;
 316 }
 317
 318 int wxJoystick::GetProductId() const
 319 {
 320     return 0;
 321 }
 322
 323 wxString wxJoystick::GetProductName() const
 324 {
 325     char name[128];
 326
 327     if (ioctl(m_device, JSIOCGNAME(sizeof(name)), name) < 0)
 328         strcpy(name, "Unknown");
 329     return wxString(name, wxConvLibc);
 330 }
 331
 332 int wxJoystick::GetXMin() const
 333 {
 334     return wxJS_AXIS_MIN;
 335 }
 336
 337 int wxJoystick::GetYMin() const
 338 {
 339     return wxJS_AXIS_MIN;
 340 }
 341
 342 int wxJoystick::GetZMin() const
 343 {
 344     return wxJS_AXIS_MIN;
 345 }
 346
 347 int wxJoystick::GetXMax() const
 348 {
 349     return wxJS_AXIS_MAX;
 350 }
 351
 352 int wxJoystick::GetYMax() const
 353 {
 354     return wxJS_AXIS_MAX;
 355 }
 356
 357 int wxJoystick::GetZMax() const
 358 {
 359     return wxJS_AXIS_MAX;
 360 }
 361
 362 int wxJoystick::GetNumberButtons() const
 363 {
 364     char nb=0;
 365
 366     if (m_device != -1)
 367         ioctl(m_device, JSIOCGBUTTONS, &nb);
 368
 369     return nb;
 370 }
 371
 372 int wxJoystick::GetNumberAxes() const
 373 {
 374     char nb=0;
 375
 376     if (m_device != -1)
 377         ioctl(m_device, JSIOCGAXES, &nb);
 378
 379     return nb;
 380 }
 381
 382 int wxJoystick::GetMaxButtons() const
 383 {
 384     return 15; // internal
 385 }
 386
 387 int wxJoystick::GetMaxAxes() const
 388 {
 389     return 15; // internal
 390 }
 391
 392 int wxJoystick::GetPollingMin() const
 393 {
 394     return 10;
 395 }
 396
 397 int wxJoystick::GetPollingMax() const
 398 {
 399     return 1000;
 400 }
 401
 402 int wxJoystick::GetRudderMin() const
 403 {
 404     return wxJS_AXIS_MIN;
 405 }
 406
 407 int wxJoystick::GetRudderMax() const
 408 {
 409     return wxJS_AXIS_MAX;
 410 }
 411
 412 int wxJoystick::GetUMin() const
 413 {
 414     return wxJS_AXIS_MIN;
 415 }
 416
 417 int wxJoystick::GetUMax() const
 418 {
 419     return wxJS_AXIS_MAX;
 420 }
 421
 422 int wxJoystick::GetVMin() const
 423 {
 424     return wxJS_AXIS_MIN;
 425 }
 426
 427 int wxJoystick::GetVMax() const
 428 {
 429     return wxJS_AXIS_MAX;
 430 }
 431
 432 bool wxJoystick::HasRudder() const
 433 {
 434     return GetNumberAxes() >= wxJS_AXIS_RUDDER;
 435 }
 436
 437 bool wxJoystick::HasZ() const
 438 {
 439     return GetNumberAxes() >= wxJS_AXIS_Z;
 440 }
 441
 442 bool wxJoystick::HasU() const
 443 {
 444     return GetNumberAxes() >= wxJS_AXIS_U;
 445 }
 446
 447 bool wxJoystick::HasV() const
 448 {
 449     return GetNumberAxes() >= wxJS_AXIS_V;
 450 }
 451
 452 bool wxJoystick::HasPOV() const
 453 {
 454     return false;
 455 }
 456
 457 bool wxJoystick::HasPOV4Dir() const
 458 {
 459     return false;
 460 }
 461
 462 bool wxJoystick::HasPOVCTS() const
 463 {
 464     return false;
 465 }
 466
 467 ////////////////////////////////////////////////////////////////////////////
 468 // Operations
 469 ////////////////////////////////////////////////////////////////////////////
 470
 471 bool wxJoystick::SetCapture(wxWindow* win, int pollingFreq)
 472 {
 473     if (m_thread)
 474     {
 475         m_thread->m_catchwin = win;
 476         m_thread->m_polling = pollingFreq;
 477         return true;
 478     }
 479     return false;
 480 }
 481
 482 bool wxJoystick::ReleaseCapture()
 483 {
 484     if (m_thread)
 485     {
 486         m_thread->m_catchwin = NULL;
 487         m_thread->m_polling = 0;
 488         return true;
 489     }
 490     return false;
 491 }
 492 #endif  // wxUSE_JOYSTICK