testhotplug.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL.h"

Include dependency graph for testhotplug.c:

Go to the source code of this file.

Functions
int	main (int argc, char *argv[])

Function Documentation

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 24 of file testhotplug.c.

References SDL_JoyButtonEvent::button, haptic, i, SDL_Event::jbutton, SDL_Event::jdevice, NULL, SDL_FALSE, SDL_GetError, SDL_HapticClose, SDL_HapticOpenFromJoystick, SDL_HapticRumbleInit, SDL_HapticRumblePlay, SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, SDL_Init, SDL_INIT_HAPTIC, SDL_INIT_JOYSTICK, SDL_INIT_VIDEO, SDL_JOYAXISMOTION, SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP, SDL_JOYDEVICEADDED, SDL_JOYDEVICEREMOVED, SDL_JoystickClose, SDL_JoystickInstanceID, SDL_JoystickIsHaptic, SDL_JoystickName, SDL_JoystickOpen, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogError, SDL_LogSetPriority, SDL_NumHaptics, SDL_NumJoysticks, SDL_PollEvent, SDL_Quit, SDL_QUIT, SDL_SetHint, SDL_strcasecmp, SDL_TRUE, SDL_Event::type, and SDL_JoyDeviceEvent::which.

{
    SDL_Joystick *joystick = NULL;
    SDL_Haptic *haptic = NULL;
    SDL_JoystickID instance = -1;
    SDL_bool keepGoing = SDL_TRUE;
    int i;
    SDL_bool enable_haptic = SDL_TRUE;
    Uint32 init_subsystems = SDL_INIT_VIDEO | SDL_INIT_JOYSTICK;
    
    for (i = 1; i < argc; ++i) {
        if (SDL_strcasecmp(argv[i], "--nohaptic") == 0) {
            enable_haptic = SDL_FALSE;
        }
    }

    if(enable_haptic) {
        init_subsystems |= SDL_INIT_HAPTIC;
    }
    
    /* Enable standard application logging */
    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

    SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");

    /* Initialize SDL (Note: video is required to start event loop) */
    if (SDL_Init(init_subsystems) < 0) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
        exit(1);
    }

    /*
    //SDL_CreateWindow("Dummy", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 128, 128, 0);
    */

    SDL_Log("There are %d joysticks at startup\n", SDL_NumJoysticks());
    if (enable_haptic)
        SDL_Log("There are %d haptic devices at startup\n", SDL_NumHaptics());

    while(keepGoing)
    {
        SDL_Event event;
        while(SDL_PollEvent(&event))
        {
            switch(event.type)
            {
                case SDL_QUIT:
                    keepGoing = SDL_FALSE;
                    break;
                case SDL_JOYDEVICEADDED:
                    if (joystick != NULL)
                    {
                        SDL_Log("Only one joystick supported by this test\n");
                    }
                    else
                    {
                        joystick = SDL_JoystickOpen(event.jdevice.which);
                        instance = SDL_JoystickInstanceID(joystick);
                        SDL_Log("Joy Added  : %d : %s\n", event.jdevice.which, SDL_JoystickName(joystick));
                        if (enable_haptic)
                        {
                            if (SDL_JoystickIsHaptic(joystick))
                            {
                                haptic = SDL_HapticOpenFromJoystick(joystick);
                                if (haptic)
                                {
                                    SDL_Log("Joy Haptic Opened\n");
                                    if (SDL_HapticRumbleInit( haptic ) != 0)
                                    {
                                        SDL_Log("Could not init Rumble!: %s\n", SDL_GetError());
                                        SDL_HapticClose(haptic);
                                        haptic = NULL;
                                    }
                                } else {
                                    SDL_Log("Joy haptic open FAILED!: %s\n", SDL_GetError());
                                }
                            }
                            else
                            {
                                SDL_Log("No haptic found\n");
                            }
                        }
                    }
                    break;
                case SDL_JOYDEVICEREMOVED:
                    if (instance == event.jdevice.which)
                    {
                        SDL_Log("Joy Removed: %d\n", event.jdevice.which);
                        instance = -1;
                        if(enable_haptic && haptic)
                        {
                            SDL_HapticClose(haptic);
                            haptic = NULL;
                        }
                        SDL_JoystickClose(joystick);
                        joystick = NULL;
                    } else {
                        SDL_Log("Unknown joystick diconnected\n");
                    }
                    break;
                case SDL_JOYAXISMOTION:
/*
//                    SDL_Log("Axis Move: %d\n", event.jaxis.axis);
*/
                    if (enable_haptic)
                        SDL_HapticRumblePlay(haptic, 0.25, 250);
                    break;
                case SDL_JOYBUTTONDOWN:
                    SDL_Log("Button Press: %d\n", event.jbutton.button);
                    if(enable_haptic && haptic)
                    {
                        SDL_HapticRumblePlay(haptic, 0.25, 250);
                    }
                    if (event.jbutton.button == 0) {
                        SDL_Log("Exiting due to button press of button 0\n");
                        keepGoing = SDL_FALSE;
                    }
                    break;
                case SDL_JOYBUTTONUP:
                    SDL_Log("Button Release: %d\n", event.jbutton.button);
                    break;
            }
        }
    }

    SDL_Quit();

    return 0;
}