Changes the current value of this Var, and reevaluates any expressions that depends on this Var.
Returns the current value of this Binding
Disable automatically re-calculation.
Enable automatically re-calculation.
Enable automatically re-calculation.
You may invoke this method more than once. Then, when you want to disable automatically re-calculation, you must invoke #unwatch same times as the number of calls to this method.
(Since version 7.0.0) Use Binding#bind instead
Source variable of data binding expression.
You can manually change the value:
Then, any data binding expressions that depend on this Var will be changed automatically.