CODEWITHSUNDEEP
c++qtsdl
Abdelrahman Wael Helaly
Abdelrahman Wael Helaly

Reputation: 53

SDL2/ Qt C++ not reading joystick inputs but recognized

that's my main.cpp 

#include "mainwindow.h"
#include <QApplication>
#include "SDL.h"

#include <QDebug>

#undef main
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    SDL_Window *window = nullptr;
    SDL_Surface *windowSurface = nullptr;

    SDL_Init(SDL_INIT_VIDEO);
    SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,"1");
    SDL_Init( SDL_INIT_JOYSTICK);

    SDL_Joystick *joystick = SDL_JoystickOpen(0);

    qDebug()<<SDL_JoystickName(joystick);
    qDebug()<<(SDL_JoystickNumAxes(joystick));
    qDebug()<<(SDL_JoystickNumButtons(joystick));
    window = SDL_CreateWindow("SDL CodingMadeEasy Series", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_SHOWN);
    windowSurface = SDL_GetWindowSurface(window);

    SDL_Event ev;
    int x;
    bool isRunning = true;

    while(isRunning)
    {
        while(SDL_PollEvent(&ev) != 0)
        {        
            if(ev.type == SDL_JOYBUTTONDOWN)
            {            
                qDebug()<<"Button Clicked";            
            }
        }    
        // Drawing the current image to the window    
        SDL_UpdateWindowSurface(window);
    }
    return a.exec();
}

it can recognize the PS4 Controller , as it prints out the qDebug lines. i tried changing the ev.type == ( SOMETHING ELSE NOT JOYSTICK RELATED ) and it worked just fine, so apparently there is a problem with the JOYBUTTONDOWN.

any help?

Upvotes: 1

Views: 947

Answers (1)

Abdelrahman Wael Helaly
Abdelrahman Wael Helaly

Reputation: 53

it was fixed by Enabling joystick events

SDL_JoystickEventState(SDL_ENABLE);

Upvotes: 2

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