Steps to Reproduce

1. visit the zul with a mobile browser (dev tool >device toolbar > ipad pro
2. click "show popup"

Current Result

the popup opens at the top-left corner

Expected Result

the popup opens at the mouse pointer's position

Debug Information

• the key is <listitem onDoubleClick="">, if not double click listener, this bug doesn't happen. another is the parent of <a> is <idspace>, not a listitem
• the popup will open the last clicking position when you click "show popup", because zk failed to record the current pointer position for

  _dblTapStart: function (evt) {
      ...
      // ZK-2179: should skip row widget
      var p = zk.Widget.$(evt.target).parent;
      if (p && (!zk.isLoaded('zul.grid') || !(p instanceof zul.grid.Row)) && (!zk.isLoaded('zul.sel') || !(p instanceof zul.sel.Listitem) && !(p instanceof zul.sel.Treerow))) tevt.stopPropagation();
    },
  

• under my quick test, without the code above, users still can scroll a listbox. need to verify the code is needed or not.

Workaround

zk-5988.js