Package com.google.gwt.event.logical.shared

## Interface HasValueChangeHandlers<T>

- Type Parameters:
    `T` - the value about to be changed
  All Superinterfaces:
    `HasHandlers`
  All Known Subinterfaces:
    `HasConstrainedValue<T>`, `HasValue<T>`
  All Known Implementing Classes:
    `CellWidget`, `CheckBox`, `DateBox`, `DatePicker`, `DoubleBox`, `IntegerBox`, `LongBox`, `PasswordTextBox`, `RadioButton`, `SimpleCheckBox`, `SimpleRadioButton`, `SuggestBox`, `TextArea`, `TextBox`, `TextBoxBase`, `ToggleButton`, `ValueBox`, `ValueBoxBase`, `ValueListBox`, `ValuePicker`

      public interface HasValueChangeHandlers<T>
      extends HasHandlers

  A widget that implements this interface is a public source of `ValueChangeEvent` events.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `HandlerRegistration` | `addValueChangeHandler​(ValueChangeHandler<T> handler)` | Adds a `ValueChangeEvent` handler.

    - ### Methods inherited from interface com.google.gwt.event.shared.HasHandlers

      `fireEvent`

- - ### Method Detail

    - #### addValueChangeHandler

          HandlerRegistration addValueChangeHandler​(ValueChangeHandler<T> handler)

      Adds a `ValueChangeEvent` handler.
      Parameters:
        `handler` - the handler
      Returns:
        the registration for the event