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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 #include "wx/log.h"
23#endif //WX_PRECOMP
24
25#include "wx/thread.h"
26
27#include <linux/joystick.h>
28#include <sys/types.h>
29#include <sys/stat.h>
30#include <sys/time.h>
31#include <sys/ioctl.h>
32#include <fcntl.h>
33#include <unistd.h>
34
35#ifdef HAVE_SYS_SELECT_H
36# include <sys/select.h>
37#endif
38
39#include "wx/unix/private.h"
40
41enum {
42 wxJS_AXIS_X = 0,
43 wxJS_AXIS_Y,
44 wxJS_AXIS_Z,
45 wxJS_AXIS_RUDDER,
46 wxJS_AXIS_U,
47 wxJS_AXIS_V,
48
49 wxJS_AXIS_MAX = 32767,
50 wxJS_AXIS_MIN = -32767,
51 wxJS_MAX_AXES = 15,
52 wxJS_MAX_BUTTONS = sizeof(int) * 8
53};
54
55
56IMPLEMENT_DYNAMIC_CLASS(wxJoystick, wxObject)
57
58
59////////////////////////////////////////////////////////////////////////////
60// Background thread for reading the joystick device
61////////////////////////////////////////////////////////////////////////////
62
63class wxJoystickThread : public wxThread
64{
65public:
66 wxJoystickThread(int device, int joystick);
67 void* Entry();
68
69private:
70 void SendEvent(wxEventType type, long ts, int change = 0);
71 int m_device;
72 int m_joystick;
73 wxPoint m_lastposition;
74 int m_axe[wxJS_MAX_AXES];
75 int m_buttons;
76 wxWindow* m_catchwin;
77 int m_polling;
78 int m_threshold;
79
80 friend class wxJoystick;
81};
82
83
84wxJoystickThread::wxJoystickThread(int device, int joystick)
85 : m_device(device),
86 m_joystick(joystick),
87 m_lastposition(wxDefaultPosition),
88 m_buttons(0),
89 m_catchwin(NULL),
90 m_polling(0),
91 m_threshold(0)
92{
93 memset(m_axe, 0, sizeof(m_axe));
94}
95
96void wxJoystickThread::SendEvent(wxEventType type, long ts, int change)
97{
98 wxJoystickEvent jwx_event(type, m_buttons, m_joystick, change);
99
100 jwx_event.SetTimestamp(ts);
101 jwx_event.SetPosition(m_lastposition);
102 jwx_event.SetZPosition(m_axe[wxJS_AXIS_Z]);
103 jwx_event.SetEventObject(m_catchwin);
104
105 if (m_catchwin)
106 m_catchwin->GetEventHandler()->AddPendingEvent(jwx_event);
107}
108
109void* wxJoystickThread::Entry()
110{
111 struct js_event j_evt;
112 fd_set read_fds;
113 struct timeval time_out = {0, 0};
114
115 wxFD_ZERO(&read_fds);
116 while (true)
117 {
118 if (TestDestroy())
119 break;
120
121 // We use select when either polling or 'blocking' as even in the
122 // blocking case we need to check TestDestroy periodically
123 if (m_polling)
124 time_out.tv_usec = m_polling * 1000;
125 else
126 time_out.tv_usec = 10 * 1000; // check at least every 10 msec in blocking case
127
128 wxFD_SET(m_device, &read_fds);
129 select(m_device+1, &read_fds, NULL, NULL, &time_out);
130 if (wxFD_ISSET(m_device, &read_fds))
131 {
132 memset(&j_evt, 0, sizeof(j_evt));
133 read(m_device, &j_evt, sizeof(j_evt));
134
135 //printf("time: %d\t value: %d\t type: %d\t number: %d\n",
136 // j_evt.time, j_evt.value, j_evt.type, j_evt.number);
137
138 if ((j_evt.type & JS_EVENT_AXIS) && (j_evt.number < wxJS_MAX_AXES))
139 {
140 // Ignore invalid axis.
141 if ( j_evt.number >= wxJS_MAX_AXES )
142 {
143 wxLogDebug(wxS("Invalid axis index %d in joystick message."),
144 j_evt.number);
145 continue;
146 }
147
148 if ( (m_axe[j_evt.number] + m_threshold < j_evt.value)
149 || (m_axe[j_evt.number] - m_threshold > j_evt.value) )
150 {
151 m_axe[j_evt.number] = j_evt.value;
152
153 switch (j_evt.number)
154 {
155 case wxJS_AXIS_X:
156 m_lastposition.x = j_evt.value;
157 SendEvent(wxEVT_JOY_MOVE, j_evt.time);
158 break;
159 case wxJS_AXIS_Y:
160 m_lastposition.y = j_evt.value;
161 SendEvent(wxEVT_JOY_MOVE, j_evt.time);
162 break;
163 case wxJS_AXIS_Z:
164 SendEvent(wxEVT_JOY_ZMOVE, j_evt.time);
165 break;
166 default:
167 SendEvent(wxEVT_JOY_MOVE, j_evt.time);
168 // TODO: There should be a way to indicate that the event
169 // is for some other axes.
170 break;
171 }
172 }
173 }
174
175 if ( (j_evt.type & JS_EVENT_BUTTON) && (j_evt.number < wxJS_MAX_BUTTONS) )
176 {
177 if (j_evt.value)
178 {
179 m_buttons |= (1 << j_evt.number);
180 SendEvent(wxEVT_JOY_BUTTON_DOWN, j_evt.time, j_evt.number);
181 }
182 else
183 {
184 m_buttons &= ~(1 << j_evt.number);
185 SendEvent(wxEVT_JOY_BUTTON_UP, j_evt.time, j_evt.number);
186 }
187 }
188 }
189 }
190
191 close(m_device);
192 return NULL;
193}
194
195
196////////////////////////////////////////////////////////////////////////////
197
198wxJoystick::wxJoystick(int joystick)
199 : m_device(-1),
200 m_joystick(joystick),
201 m_thread(NULL)
202{
203 wxString dev_name;
204
205 // old /dev structure
206 dev_name.Printf( wxT("/dev/js%d"), joystick);
207 m_device = open(dev_name.fn_str(), O_RDONLY);
208
209 // new /dev structure with "input" subdirectory
210 if (m_device == -1)
211 {
212 dev_name.Printf( wxT("/dev/input/js%d"), joystick);
213 m_device = open(dev_name.fn_str(), O_RDONLY);
214 }
215
216 if (m_device != -1)
217 {
218 m_thread = new wxJoystickThread(m_device, m_joystick);
219 m_thread->Create();
220 m_thread->Run();
221 }
222}
223
224
225wxJoystick::~wxJoystick()
226{
227 ReleaseCapture();
228 if (m_thread)
229 m_thread->Delete(); // It's detached so it will delete itself
230 m_device = -1;
231}
232
233
234////////////////////////////////////////////////////////////////////////////
235// State
236////////////////////////////////////////////////////////////////////////////
237
238wxPoint wxJoystick::GetPosition() const
239{
240 wxPoint pos(wxDefaultPosition);
241 if (m_thread) pos = m_thread->m_lastposition;
242 return pos;
243}
244
245int wxJoystick::GetPosition(unsigned axis) const
246{
247 if (m_thread && (axis < wxJS_MAX_AXES))
248 return m_thread->m_axe[axis];
249 return 0;
250}
251
252int wxJoystick::GetZPosition() const
253{
254 if (m_thread)
255 return m_thread->m_axe[wxJS_AXIS_Z];
256 return 0;
257}
258
259int wxJoystick::GetButtonState() const
260{
261 if (m_thread)
262 return m_thread->m_buttons;
263 return 0;
264}
265
266bool wxJoystick::GetButtonState(unsigned id) const
267{
268 if (m_thread && (id < wxJS_MAX_BUTTONS))
269 return (m_thread->m_buttons & (1 << id)) != 0;
270 return false;
271}
272
273int wxJoystick::GetPOVPosition() const
274{
275 return -1;
276}
277
278int wxJoystick::GetPOVCTSPosition() const
279{
280 return -1;
281}
282
283int wxJoystick::GetRudderPosition() const
284{
285 if (m_thread)
286 return m_thread->m_axe[wxJS_AXIS_RUDDER];
287 return 0;
288}
289
290int wxJoystick::GetUPosition() const
291{
292 if (m_thread)
293 return m_thread->m_axe[wxJS_AXIS_U];
294 return 0;
295}
296
297int wxJoystick::GetVPosition() const
298{
299 if (m_thread)
300 return m_thread->m_axe[wxJS_AXIS_V];
301 return 0;
302}
303
304int wxJoystick::GetMovementThreshold() const
305{
306 if (m_thread)
307 return m_thread->m_threshold;
308 return 0;
309}
310
311void wxJoystick::SetMovementThreshold(int threshold)
312{
313 if (m_thread)
314 m_thread->m_threshold = threshold;
315}
316
317////////////////////////////////////////////////////////////////////////////
318// Capabilities
319////////////////////////////////////////////////////////////////////////////
320
321bool wxJoystick::IsOk() const
322{
323 return (m_device != -1);
324}
325
326int wxJoystick::GetNumberJoysticks()
327{
328 wxString dev_name;
329 int fd, j;
330
331 for (j=0; j<4; j++) {
332 dev_name.Printf(wxT("/dev/js%d"), j);
333 fd = open(dev_name.fn_str(), O_RDONLY);
334 if (fd == -1)
335 break;
336 close(fd);
337 }
338
339 if (j == 0) {
340 for (j=0; j<4; j++) {
341 dev_name.Printf(wxT("/dev/input/js%d"), j);
342 fd = open(dev_name.fn_str(), O_RDONLY);
343 if (fd == -1)
344 return j;
345 close(fd);
346 }
347 }
348
349 return j;
350}
351
352int wxJoystick::GetManufacturerId() const
353{
354 return 0;
355}
356
357int wxJoystick::GetProductId() const
358{
359 return 0;
360}
361
362wxString wxJoystick::GetProductName() const
363{
364 char name[128];
365
366 if (ioctl(m_device, JSIOCGNAME(sizeof(name)), name) < 0)
367 strcpy(name, "Unknown");
368 return wxString(name, wxConvLibc);
369}
370
371int wxJoystick::GetXMin() const
372{
373 return wxJS_AXIS_MIN;
374}
375
376int wxJoystick::GetYMin() const
377{
378 return wxJS_AXIS_MIN;
379}
380
381int wxJoystick::GetZMin() const
382{
383 return wxJS_AXIS_MIN;
384}
385
386int wxJoystick::GetXMax() const
387{
388 return wxJS_AXIS_MAX;
389}
390
391int wxJoystick::GetYMax() const
392{
393 return wxJS_AXIS_MAX;
394}
395
396int wxJoystick::GetZMax() const
397{
398 return wxJS_AXIS_MAX;
399}
400
401int wxJoystick::GetNumberButtons() const
402{
403 char nb=0;
404
405 if (m_device != -1)
406 ioctl(m_device, JSIOCGBUTTONS, &nb);
407
408 if ((int)nb > wxJS_MAX_BUTTONS)
409 nb = wxJS_MAX_BUTTONS;
410
411 return nb;
412}
413
414int wxJoystick::GetNumberAxes() const
415{
416 char nb=0;
417
418 if (m_device != -1)
419 ioctl(m_device, JSIOCGAXES, &nb);
420
421 if ((int)nb > wxJS_MAX_AXES)
422 nb = wxJS_MAX_AXES;
423
424 return nb;
425}
426
427int wxJoystick::GetMaxButtons() const
428{
429 return wxJS_MAX_BUTTONS; // internal
430}
431
432int wxJoystick::GetMaxAxes() const
433{
434 return wxJS_MAX_AXES; // internal
435}
436
437int wxJoystick::GetPollingMin() const
438{
439 return 10;
440}
441
442int wxJoystick::GetPollingMax() const
443{
444 return 1000;
445}
446
447int wxJoystick::GetRudderMin() const
448{
449 return wxJS_AXIS_MIN;
450}
451
452int wxJoystick::GetRudderMax() const
453{
454 return wxJS_AXIS_MAX;
455}
456
457int wxJoystick::GetUMin() const
458{
459 return wxJS_AXIS_MIN;
460}
461
462int wxJoystick::GetUMax() const
463{
464 return wxJS_AXIS_MAX;
465}
466
467int wxJoystick::GetVMin() const
468{
469 return wxJS_AXIS_MIN;
470}
471
472int wxJoystick::GetVMax() const
473{
474 return wxJS_AXIS_MAX;
475}
476
477bool wxJoystick::HasRudder() const
478{
479 return GetNumberAxes() >= wxJS_AXIS_RUDDER;
480}
481
482bool wxJoystick::HasZ() const
483{
484 return GetNumberAxes() >= wxJS_AXIS_Z;
485}
486
487bool wxJoystick::HasU() const
488{
489 return GetNumberAxes() >= wxJS_AXIS_U;
490}
491
492bool wxJoystick::HasV() const
493{
494 return GetNumberAxes() >= wxJS_AXIS_V;
495}
496
497bool wxJoystick::HasPOV() const
498{
499 return false;
500}
501
502bool wxJoystick::HasPOV4Dir() const
503{
504 return false;
505}
506
507bool wxJoystick::HasPOVCTS() const
508{
509 return false;
510}
511
512////////////////////////////////////////////////////////////////////////////
513// Operations
514////////////////////////////////////////////////////////////////////////////
515
516bool wxJoystick::SetCapture(wxWindow* win, int pollingFreq)
517{
518 if (m_thread)
519 {
520 m_thread->m_catchwin = win;
521 m_thread->m_polling = pollingFreq;
522 return true;
523 }
524 return false;
525}
526
527bool wxJoystick::ReleaseCapture()
528{
529 if (m_thread)
530 {
531 m_thread->m_catchwin = NULL;
532 m_thread->m_polling = 0;
533 return true;
534 }
535 return false;
536}
537#endif // wxUSE_JOYSTICK