GWT ComboBox 值变化处理器

Question

I have a GWT-EXT ComboBox having some 3-5 value in my project.
Can anyboy help me to find value change event(or selection event)?
Or any other way to get notified with GWT-EXT ComboBox state change.

Answer 1

If you are reffering to Listbox

add ChangeHandler

dropBox.addChangeHandler(new ChangeHandler() {
      public void onChange(ChangeEvent event) {
        //do something
      }
    });

Here is the live demo, source code.

Answer 2

lambda expression

field.addChangedHandler(handler -> {
    //your code
})