org.apache.wicket.markup.html.basic
Class EnclosureContainer

java.lang.Object
  org.apache.wicket.Component
      org.apache.wicket.MarkupContainer
          org.apache.wicket.markup.html.WebMarkupContainer
              org.apache.wicket.markup.html.basic.EnclosureContainer

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<Component>, IEventSink, IEventSource, IClusterable, IConverterLocator, IHeaderContributor, IRequestableComponent, IHierarchical<Component>

public class EnclosureContainer
extends WebMarkupContainer

<wicket:enclosure> is nice and prevents that users have to add boilerplate to their application. But it is not without problems. The child components are children in the markup, but the auto-component generated for the enclosure tag will not magically re-parent the child components. Thus the markup hierarchy and the component hierarchy will be out of sync. The automatically created enclosure container will be created along side its "children" with both attached to the very same parent container. That leads to a tricky situation since e.g. onBeforeRender() will be called for enclosure children even if the enclosure is made invisible by it controlling child.

On top auto-components cannot keep any state. A new instance is created during each render process and automatically deleted at the end. That implies that we cannot prevent validation() from being called, since validation() is called before the actual render process has started.

Where any of these problems apply, you may replace the tag and manually add this simple container which basically does the same. But instead of adding the children to the Page, Panel whatever, you must add the children to this container in order to keep the component hierarchy in sync.

Since:

1.5

Author:

Juergen Donnerstag

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.wicket.Component

ENABLE, FLAG_INITIALIZED, FLAG_REMOVING_FROM_HIERARCHY, FLAG_RESERVED1, FLAG_RESERVED2, FLAG_RESERVED3, FLAG_RESERVED4, FLAG_RESERVED5, FLAG_RESERVED8, PARENT_PATH, PATH_SEPARATOR, RENDER

Constructor Summary

EnclosureContainer(java.lang.String id, Component child)
Construct.

Method Summary

boolean

isVisible() Gets whether this component and any children are visible.

Methods inherited from class org.apache.wicket.markup.html.WebMarkupContainer

getWebPage, getWebRequest

Methods inherited from class org.apache.wicket.MarkupContainer

add, addOrReplace, autoAdd, contains, get, get, getAssociatedMarkup, getAssociatedMarkupStream, getMarkup, getMarkupType, hasAssociatedMarkup, internalAdd, internalInitialize, iterator, iterator, onAfterRenderChildren, onComponentTagBody, onMarkupAttached, onRender, remove, remove, removeAll, renderAll, renderAssociatedMarkup, renderNext, replace, setDefaultModel, size, swap, toString, toString, visitChildren, visitChildren, visitChildren, visitChildren

Methods inherited from class org.apache.wicket.Component

add, addStateChange, afterRender, beforeRender, canCallListenerInterface, checkComponentTag, checkComponentTagAttribute, checkHierarchyChange, configure, continueToOriginalDestination, debug, detach, detachModel, detachModels, determineVisibility, error, exceptionMessage, fatal, findMarkupStream, findPage, findParent, findParentWithAssociatedMarkup, getAjaxRegionMarkupId, getApplication, getBehaviorById, getBehaviorId, getBehaviors, getBehaviors, getClassRelativePath, getConverter, getDefaultModel, getDefaultModelObject, getDefaultModelObjectAsString, getDefaultModelObjectAsString, getEscapeModelStrings, getFeedbackMessage, getFeedbackMessages, getFlag, getId, getInnermostModel, getInnermostModel, getLocale, getLocalizer, getMarkup, getMarkupAttributes, getMarkupId, getMarkupId, getMarkupIdFromMarkup, getMarkupIdImpl, getMarkupSourcingStrategy, getMetaData, getModelComparator, getOutputMarkupId, getOutputMarkupPlaceholderTag, getPage, getPageRelativePath, getParent, getPath, getRenderBodyOnly, getRequest, getRequestCycle, getRequestFlag, getResponse, getSession, getSizeInBytes, getStatelessHint, getString, getString, getString, getStyle, getVariation, hasBeenRendered, hasErrorMessage, hasFeedbackMessage, info, initModel, internalOnModelChanged, internalPrepareForRender, internalRenderComponent, isActionAuthorized, isAuto, isBehaviorAccepted, isEnableAllowed, isEnabled, isEnabledInHierarchy, isIgnoreAttributeModifier, isRenderAllowed, isStateless, isVersioned, isVisibilityAllowed, isVisibleInHierarchy, locateMarkupStream, markRendering, modelChanged, modelChanging, newMarkupSourcingStrategy, onAfterRender, onBeforeRender, onComponentTag, onConfigure, onDetach, onEvent, onInitialize, onModelChanged, onModelChanging, onRemove, prepareForRender, redirectToInterceptPage, remove, remove, render, renderComponentTag, rendered, renderHead, renderHead, renderHead, renderPlaceholderTag, replaceComponentTagBody, replaceWith, sameInnermostModel, sameInnermostModel, send, setAuto, setDefaultModelObject, setEnabled, setEscapeModelStrings, setFlag, setIgnoreAttributeModifier, setMarkup, setMarkupId, setMarkupIdImpl, setMetaData, setOutputMarkupId, setOutputMarkupPlaceholderTag, setParent, setRenderBodyOnly, setRequestFlag, setResponsePage, setResponsePage, setResponsePage, setVersioned, setVisibilityAllowed, setVisible, success, urlFor, urlFor, urlFor, urlFor, urlFor, visitParents, warn, wrap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

EnclosureContainer

public EnclosureContainer(java.lang.String id,
                          Component child)

Construct.

Parameters:

id -

child - child component that will control the visibility of the enclosure

Method Detail

isVisible

public boolean isVisible()

Description copied from class: Component

Gets whether this component and any children are visible.

WARNING: this method can be called multiple times during a request. If you override this method, it is a good idea to keep it cheap in terms of processing. Alternatively, you can call Component.setVisible(boolean).

Overrides:

isVisible in class Component

Returns:

True if component and any children are visible