Ext.tree.TreeNode setting tooltip dynamic

I was wonder is it possible to add dynamicly too开发者_运维百科ltiptext to a specific tree node, i've tryied to set qtip property but with no success....

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With myNode being a TreeNode you can try something like :

myNode.ui.textNode.setAttribute('ext:qtip', 'My dynamic tooltip');

You probably know that but don't forget to activate QuickTips :

Ext.QuickTips.init();