org.apache.wicket.extensions.ajax.markup.html.form.upload
Class UploadProgressBar

java.lang.Object
  org.apache.wicket.Component
      org.apache.wicket.MarkupContainer
          org.apache.wicket.markup.html.WebMarkupContainer
              org.apache.wicket.markup.html.panel.Panel
                  org.apache.wicket.extensions.ajax.markup.html.form.upload.UploadProgressBar

All Implemented Interfaces:

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

public class UploadProgressBar
extends Panel

A panel to show the progress of an HTTP upload.

Note: For this to work upload progress monitoring must be enabled in the wicket application. Example:

 
  public class App extends WebApplication {
 
        @Override
        protected void init() {
                super.init();
 
                getApplicationSettings().setUploadProgressUpdatesEnabled(true); // <--
        }
 }
 
 

For customizing starting text see RESOURCE_STARTING. Implementation detail: Despite being located in an Ajax package, the progress communication is not done via Ajax but with an IFrame instead due to a bug in Webkit based browsers, see WICKET-3202.

Author:

Andrew Lombardi

See Also:

Serialized Form

Nested Class Summary

static class

UploadProgressBar.ComponentInitializer Initializer for this component; binds static resources.

Field Summary

static java.lang.String

RESOURCE_STARTING Resource key used to retrieve starting message for.

Fields inherited from class org.apache.wicket.markup.html.panel.Panel

PANEL

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

UploadProgressBar(java.lang.String id, Form<?> form)
Constructor that will display the upload progress bar for every submit of the given form.

UploadProgressBar(java.lang.String id, Form<?> form, FileUploadField uploadField)
Constructor that will display the upload progress bar for submissions of the given form, that include a file upload in the given file upload field; i.e.

Method Summary

protected ResourceReference	getCss() Override this to provide your own CSS, or return null to avoid including the default.
protected void	onInitialize() This method is meant to be used as an alternative to initialize components.
void	renderHead(IHeaderResponse response) Render to the web response whatever the component wants to contribute to the head section.

Methods inherited from class org.apache.wicket.markup.html.panel.Panel

newMarkupSourcingStrategy

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, isVisible, isVisibleInHierarchy, locateMarkupStream, markRendering, modelChanged, modelChanging, onAfterRender, onBeforeRender, onComponentTag, onConfigure, onDetach, onEvent, onModelChanged, onModelChanging, onRemove, prepareForRender, redirectToInterceptPage, remove, remove, render, renderComponentTag, rendered, 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

Field Detail

RESOURCE_STARTING

public static final java.lang.String RESOURCE_STARTING

Resource key used to retrieve starting message for. Example: UploadProgressBar.starting=Upload starting...

See Also:

Constant Field Values

Constructor Detail

UploadProgressBar

public UploadProgressBar(java.lang.String id,
                         Form<?> form)

Constructor that will display the upload progress bar for every submit of the given form.

Parameters:

id - component id (not null)

form - form that will be submitted (not null)

UploadProgressBar

public UploadProgressBar(java.lang.String id,
                         Form<?> form,
                         FileUploadField uploadField)

Constructor that will display the upload progress bar for submissions of the given form, that include a file upload in the given file upload field; i.e. if the user did not select a file in the given file upload field, the progess bar is not displayed.

Parameters:

id - component id (not null)

form - form that is submitted (not null)

uploadField - the file upload field to check for a file upload, or null to display the upload field for every submit of the given form

Method Detail

onInitialize

protected void onInitialize()

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().

Overrides:

onInitialize in class Component

getCss

protected ResourceReference getCss()

Override this to provide your own CSS, or return null to avoid including the default.

Returns:

ResourceReference for your CSS.

renderHead

public void renderHead(IHeaderResponse response)

Render to the web response whatever the component wants to contribute to the head section.

Specified by:

renderHead in interface IHeaderContributor

Overrides:

renderHead in class Component

Parameters:

response - Response object