Class FormComponentFeedbackIndicator

All Implemented Interfaces:
Serializable, Iterable<Component>, IEventSink, IEventSource, IFeedback, IFeedbackContributor, IConverterLocator, IMetadataContext<Serializable,Component>, IQueueRegion, IHeaderContributor, IRequestableComponent, IHierarchical<Component>, IClusterable

public class FormComponentFeedbackIndicator extends Panel implements IFeedback
A panel that hides or shows itself depending on whether there are feedback messages for a given message filter. If a component is set using setIndicatorFor(Component), then the indicator is visible when the given component has an error. The default content for this indicator is a red star, but you can subclass this panel and provide your own markup to give any custom look you desire.
Jonathan Locke
See Also:
  • Field Details

  • Constructor Details

  • Method Details

    • setIndicatorFor

      public void setIndicatorFor(Component component)
      component - The component to watch for messages
    • onInitialize

      protected void onInitialize()
      Description copied from class: Component
      This method is meant to be used as an alternative to initialize components. Usually the component's constructor is used for this task, but sometimes a component cannot be initialized in isolation, it may need to access its parent component or its markup in order to fully initialize. This method is invoked once per component's lifecycle when a path exists from this component to the Page thus providing the component with an atomic callback when the component's environment is built out.

      Overrides must call super#Component.onInitialize(). Usually this should be the first thing an override does, much like a constructor.

      Parent containers are guaranteed to be initialized before their children

      It is safe to use Component.getPage() in this method

      NOTE:The timing of this call is not precise, the contract is that it is called sometime before Component.onBeforeRender().

      onInitialize in class MarkupContainer
    • onConfigure

      public void onConfigure()
      Set the component's visibility according to the existence (or not) of feedback messages
      onConfigure in class Component
    • getFeedbackMessageFilter

      Let subclass specify some other filter