var TooltipDiv = (function () {

  var isInit = false;

  function _ () { };

  _.initTool = function (frameDiv) {
    if (isInit) { return; }

    var div = document.createElement('DIV');
    div.className = "toolTip-left";//

    // var arrow = document.createElement('DIV');
    // arrow.className = "tooltipdiv-arrow";
    // div.appendChild(arrow);

    var title = document.createElement('DIV');
    title.className = "tooltipdiv-inner";
    div.appendChild(title);

    this._div = div;
    this._title = title;

    frameDiv.appendChild(div);

    isInit = true;
  }

  _.setVisible = function (visible) {
    if (!isInit) { return; }
    this._div.style.display = visible ? 'block' : 'none';
  };

  /*
  position屏幕坐标
  显示在屏幕上
  */
  _.showAt = function (position, message) {
    if (!isInit) { return; }
    if (position && message) {
      this.setVisible(true);
      this._title.innerHTML = message;
      this._div.style.position = "absolute"
      this._div.style.left = position.x + 60 + "px";
      this._div.style.top = (position.y - this._div.clientHeight/2) + "px";
    }
  };

  return _;
})();