Create new form inside tree view and add fields which you have displayed on tree view only. When clicking on that record it will display new form view.

Could you please show us your shots or The code that you've written in your files? 

hello dear. as your request for details record of one2many field without a click on it, it is achieved by 

Hello,

If you mean by 'details are displayed' the form view of the field, you can simple remove the form part of the fields

and make your tree editable

e.g <tree editable='bottom' ...

Regards,