Method: Mouse#pinch

Defined in:
ext/mouse/mouse.c

#pinch(, self) ⇒ Object 



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# File 'ext/mouse/mouse.c', line 841

static
VALUE
rb_mouse_pinch(const int argc, VALUE* const argv, UNUSED const VALUE self)
{
    if (!argc)
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 1+)", argc);

    const VALUE input_direction = argv[0];
    CGPinchDirection  direction = kCGPinchNone;

    if (input_direction == sym_expand || input_direction == sym_zoom)
        direction = kCGPinchExpand;
    else if (input_direction == sym_contract || input_direction == sym_unzoom)
        direction = kCGPinchContract;
    else
        rb_raise(rb_eArgError,
                 "invalid pinch direction `%s'",
                 rb_id2name(SYM2ID(input_direction)));

    if (argc == 1) {
        mouse_pinch(direction);
        return CURRENT_POSITION;
    }

    const double magnification = NUM2DBL(argv[1]);
    if (argc == 2) {
        mouse_pinch2(direction, magnification);
        return CURRENT_POSITION;
    }

    const CGPoint point = rb_mouse_unwrap_point(argv[2]);
    if (argc == 3) {
        mouse_pinch3(direction, magnification, point);
        return CURRENT_POSITION;
    }

    const double duration = NUM2DBL(argv[3]);
    mouse_pinch4(direction, magnification, point, duration);
    return CURRENT_POSITION;
}