SDL_uikitview_snipet.m

/**
 * These snipets are licensed under CC0.
 * http://creativecommons.org/publicdomain/zero/1.0/deed.ja
 *
 * Rewrite to SDL_uikitview.m and LongPressGesture is associated to "Right-Click"
 */

- (instancetype)initWithFrame:(CGRect)frame
{
    if ((self = [super initWithFrame:frame])) {
        
        
        /* ...add it to the end of this block */
        
        
        UILongPressGestureRecognizer *longPressGesture =
        [[UILongPressGestureRecognizer alloc]
         initWithTarget:self
         action:@selector(longPressGestureBegan:)];
        
        // allows 10px Error
        longPressGesture.allowableMovement = 100;
        // waiting time to tap until the event occurs
        longPressGesture.minimumPressDuration = 1.0f;
        // number of tapping.1 time = 0
        longPressGesture.numberOfTapsRequired = 0;
        // number of fingure(s)
        longPressGesture.numberOfTouchesRequired = 1;
        // add Gesture
        [self addGestureRecognizer:longPressGesture];
    }

    return self;
}

/*detected longpress gesture*/
-(void) longPressGestureBegan:(UILongPressGestureRecognizer *)sender {
    SDL_SendMouseButton(sdlwindow, 0, SDL_PRESSED, SDL_BUTTON_RIGHT);
    [[NSRunLoop mainRunLoop]
     addTimer:[NSTimer
               timerWithTimeInterval:0.5f
               target:self
               selector:@selector(longPressGestureStop)
               userInfo:nil
               repeats:false
               ]
     forMode:NSDefaultRunLoopMode
    ];
}

/**clear SDL_SendMouseButton*/
- (void) longPressGestureStop {
    SDL_SendMouseButton(sdlwindow, 0, SDL_RELEASED, SDL_BUTTON_RIGHT);
}