com.smartgwt.client.widgets.form

## Interface FormItemInputTransformer

-     public interface FormItemInputTransformer

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `java.lang.Object` | `transformInput(DynamicForm form, FormItem item, java.lang.Object value, java.lang.Object oldValue)` Called when a FormItem's value is about to change as the result of user interaction.

- - ### Method Detail

    - #### transformInput

          java.lang.Object transformInput(DynamicForm form,
                                          FormItem item,
                                          java.lang.Object value,
                                          java.lang.Object oldValue)

      Called when a FormItem's value is about to change as the result of user interaction. This method fires after the user performed an action that would change the value of this field, and allows the developer to modify / reformat the value before it gets validated / saved. Fires before the `change` event.
      Parameters:
        `form` - the managing DynamicForm instane
        `item` - the form item itself
        `value` - the new value of the form item
        `oldValue` - the previous (current) value of the form item
      Returns:
        the desired new value for the form item