1 /*
2   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
3 
4   This software is provided 'as-is', without any express or implied
5   warranty.  In no event will the authors be held liable for any damages
6   arising from the use of this software.
7 
8   Permission is granted to anyone to use this software for any purpose,
9   including commercial applications, and to alter it and redistribute it
10   freely.
11 */
12 
13 /* Simple program to test the SDL joystick hotplugging */
14 
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <string.h>
18 
19 #include "SDL.h"
20 
21 #if !defined SDL_JOYSTICK_DISABLED && !defined SDL_HAPTIC_DISABLED
22 
23 int
main(int argc,char * argv[])24 main(int argc, char *argv[])
25 {
26     SDL_Joystick *joystick = NULL;
27     SDL_Haptic *haptic = NULL;
28     SDL_JoystickID instance = -1;
29     SDL_bool keepGoing = SDL_TRUE;
30     int i;
31     SDL_bool enable_haptic = SDL_TRUE;
32     Uint32 init_subsystems = SDL_INIT_VIDEO | SDL_INIT_JOYSTICK;
33 
34     for (i = 1; i < argc; ++i) {
35         if (SDL_strcasecmp(argv[i], "--nohaptic") == 0) {
36             enable_haptic = SDL_FALSE;
37         }
38     }
39 
40     if(enable_haptic) {
41         init_subsystems |= SDL_INIT_HAPTIC;
42     }
43 
44     /* Enable standard application logging */
45     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
46 
47     SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
48 
49     /* Initialize SDL (Note: video is required to start event loop) */
50     if (SDL_Init(init_subsystems) < 0) {
51         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
52         exit(1);
53     }
54 
55     /*
56     //SDL_CreateWindow("Dummy", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 128, 128, 0);
57     */
58 
59     SDL_Log("There are %d joysticks at startup\n", SDL_NumJoysticks());
60     if (enable_haptic)
61         SDL_Log("There are %d haptic devices at startup\n", SDL_NumHaptics());
62 
63     while(keepGoing)
64     {
65         SDL_Event event;
66         while(SDL_PollEvent(&event))
67         {
68             switch(event.type)
69             {
70                 case SDL_QUIT:
71                     keepGoing = SDL_FALSE;
72                     break;
73                 case SDL_JOYDEVICEADDED:
74                     if (joystick != NULL)
75                     {
76                         SDL_Log("Only one joystick supported by this test\n");
77                     }
78                     else
79                     {
80                         joystick = SDL_JoystickOpen(event.jdevice.which);
81                         instance = SDL_JoystickInstanceID(joystick);
82                         SDL_Log("Joy Added  : %d : %s\n", event.jdevice.which, SDL_JoystickName(joystick));
83                         if (enable_haptic)
84                         {
85                             if (SDL_JoystickIsHaptic(joystick))
86                             {
87                                 haptic = SDL_HapticOpenFromJoystick(joystick);
88                                 if (haptic)
89                                 {
90                                     SDL_Log("Joy Haptic Opened\n");
91                                     if (SDL_HapticRumbleInit( haptic ) != 0)
92                                     {
93                                         SDL_Log("Could not init Rumble!: %s\n", SDL_GetError());
94                                         SDL_HapticClose(haptic);
95                                         haptic = NULL;
96                                     }
97                                 } else {
98                                     SDL_Log("Joy haptic open FAILED!: %s\n", SDL_GetError());
99                                 }
100                             }
101                             else
102                             {
103                                 SDL_Log("No haptic found\n");
104                             }
105                         }
106                     }
107                     break;
108                 case SDL_JOYDEVICEREMOVED:
109                     if (instance == event.jdevice.which)
110                     {
111                         SDL_Log("Joy Removed: %d\n", event.jdevice.which);
112                         instance = -1;
113                         if(enable_haptic && haptic)
114                         {
115                             SDL_HapticClose(haptic);
116                             haptic = NULL;
117                         }
118                         SDL_JoystickClose(joystick);
119                         joystick = NULL;
120                     } else {
121                         SDL_Log("Unknown joystick diconnected\n");
122                     }
123                     break;
124                 case SDL_JOYAXISMOTION:
125 /*
126 //                    SDL_Log("Axis Move: %d\n", event.jaxis.axis);
127 */
128                     if (enable_haptic)
129                         SDL_HapticRumblePlay(haptic, 0.25, 250);
130                     break;
131                 case SDL_JOYBUTTONDOWN:
132                     SDL_Log("Button Press: %d\n", event.jbutton.button);
133                     if(enable_haptic && haptic)
134                     {
135                         SDL_HapticRumblePlay(haptic, 0.25, 250);
136                     }
137                     if (event.jbutton.button == 0) {
138                         SDL_Log("Exiting due to button press of button 0\n");
139                         keepGoing = SDL_FALSE;
140                     }
141                     break;
142                 case SDL_JOYBUTTONUP:
143                     SDL_Log("Button Release: %d\n", event.jbutton.button);
144                     break;
145             }
146         }
147     }
148 
149     SDL_Quit();
150 
151     return 0;
152 }
153 #else
154 
155 int
main(int argc,char * argv[])156 main(int argc, char *argv[])
157 {
158     SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL compiled without Joystick and haptic support.\n");
159     return 1;
160 }
161 
162 #endif
163