var isDown = false;
var startX = 0;
var startScrollLeft = 0;
var hasMoved = false;

cbox.addEventListener('mousedown', function(e) {
  if (e.button !== 0) return;
  isDown = true;
  hasMoved = false;
  startX = e.pageX;
  startScrollLeft = cbox.scrollLeft;
  cbox.classList.add('dqs-dragging');
});

document.addEventListener('mousemove', function(e) {
  if (!isDown) return;
  var walk = e.pageX - startX;
  if (Math.abs(walk) > 5) hasMoved = true;
  if (hasMoved) {
    e.preventDefault();
    cbox.scrollLeft = startScrollLeft - walk;
  }
});

document.addEventListener('mouseup', function(e) {
  if (!isDown) return;
  isDown = false;
  cbox.classList.remove('dqs-dragging');
  if (hasMoved) {
    // امنع النقر على الروابط بعد السحب
    var preventClick = function(ev) {
      ev.preventDefault();
      ev.stopPropagation();
      cbox.removeEventListener('click', preventClick, true);
    };
    cbox.addEventListener('click', preventClick, true);
  }
});