When drag a cell from the frozen columns, the dragging proxy should be append to <body>. Please refer to the following code.
$('#dg').datagrid({
onLoadSuccess: function(){
var dc = $(this).data('datagrid').dc;
dc.body1.find('div.datagrid-cell').draggable({
revert: true,
proxy: function(source){
var p = $('<div></div>').appendTo('body');
p.html($(source).html());
p.attr('class', $(source).attr('class'));
p.attr('style', $(source).attr('style'));
p.css('border', '1px solid #ccc');
return p;
}
})
}
})
