src/unix/joystick.cpp

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