How to fire Rename label in TreeView

Clicking on a Label in a TreeView will allow you to change the Label. Can this be done automatically?

for example, if i add a new node and say i gave it a temporary label; i want the user to change this temporary label. instead of the user having to click the node twice (to be able to edit), i want this done automatically. so all the user has to do is type in the new label.

thanks!