org.apache.wicket.markup.html.image
Class Image

java.lang.Object
  org.apache.wicket.Component
      org.apache.wicket.markup.html.WebComponent
          org.apache.wicket.markup.html.image.Image

All Implemented Interfaces:

java.io.Serializable, IClusterable, IConverterLocator, IRequestListener, IResourceListener

Direct Known Subclasses:

NonCachingImage

public class Image
extends WebComponent
implements IResourceListener

An Image component displays a localizable image resource.

For details of how Images load, generate and manage images, see LocalizedImageResource.

Author:

Jonathan Locke

See Also:

NonCachingImage, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.Component

Component.ComponentModelChange, Component.EnabledChange, Component.IVisitor<T extends Component>, Component.VisibilityChange

Field Summary

Fields inherited from class org.apache.wicket.Component

ENABLE, FLAG_RESERVED1, FLAG_RESERVED2, FLAG_RESERVED3, FLAG_RESERVED4, FLAG_RESERVED5, FLAG_RESERVED6, FLAG_RESERVED7, FLAG_RESERVED8, PATH_SEPARATOR, RENDER

Fields inherited from interface org.apache.wicket.IResourceListener

INTERFACE

Constructor Summary

Image(java.lang.String id)
This constructor can be used if you have a img tag that has a src that points to a PackageResource (which will be created and bind to the shared resources) Or if you have a value attribute in your tag for which the image factory can make an image.

Image(java.lang.String id, IModel<?> model)

Image(java.lang.String id, Resource imageResource)
Constructs an image directly from an image resource.

Image(java.lang.String id, ResourceReference resourceReference)
Constructs an image from an image resourcereference.

Image(java.lang.String id, ResourceReference resourceReference, ValueMap resourceParameters)
Constructs an image from an image resourcereference.

Image(java.lang.String id, java.lang.String string)

Method Summary

protected Resource	getImageResource()
protected ResourceReference	getImageResourceReference()
protected boolean	getStatelessHint() Returns whether the component can be stateless.
protected IModel<?>	initModel() Called when a null model is about to be retrieved in order to allow a subclass to provide an initial model.
protected void	onComponentTag(ComponentTag tag) Processes the component tag.
protected void	onComponentTagBody(MarkupStream markupStream, ComponentTag openTag) Processes the body.
void	onResourceRequested() Called when a resource is requested.
Component	setDefaultModel(IModel<?> model) Sets the given model.
void	setImageResource(Resource imageResource)
void	setImageResourceReference(ResourceReference resourceReference)
void	setImageResourceReference(ResourceReference resourceReference, ValueMap parameters)

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

onRender

Methods inherited from class org.apache.wicket.Component

add, addStateChange, afterRender, beforeRender, callOnBeforeRenderIfNotVisible, checkComponentTag, checkComponentTagAttribute, checkHierarchyChange, continueToOriginalDestination, debug, detach, detachBehaviors, detachModel, detachModels, determineVisibility, error, exceptionMessage, fatal, findMarkupStream, findPage, findParent, findParentWithAssociatedMarkup, getApplication, getBehaviors, getBehaviors, getBehaviorsRawList, getClassRelativePath, getComponentBorder, getConverter, getConverter, getDefaultModel, getDefaultModelObject, getDefaultModelObjectAsString, getDefaultModelObjectAsString, getEscapeModelStrings, getFeedbackMessage, getFlag, getFlag, getId, getInnermostModel, getInnermostModel, getLocale, getLocalizer, getMarkupAttributes, getMarkupId, getMarkupId, getMarkupIdImpl, getMetaData, getModelComparator, getOutputMarkupId, getOutputMarkupPlaceholderTag, getPage, getPageRelativePath, getParent, getPath, getRenderBodyOnly, getRequest, getRequestCycle, getResponse, getSession, getSizeInBytes, getString, getString, getString, getStyle, getVariation, hasBeenRendered, hasErrorMessage, hasFeedbackMessage, info, internalAttach, internalDetach, internalOnAttach, internalOnDetach, internalOnModelChanged, isActionAuthorized, isAncestorOf, isAttached, isBehaviorAccepted, isEnableAllowed, isEnabled, isEnabledInHierarchy, isIgnoreAttributeModifier, isRenderAllowed, isStateless, isVersioned, isVisibilityAllowed, isVisible, isVisibleInHierarchy, locateMarkupStream, markAttached, markRendering, modelChanged, modelChanging, onAfterRender, onAttach, onBeforeRender, onBeginRequest, onDetach, onEndRequest, onModelChanged, onModelChanging, prepareForRender, prepareForRender, redirectToInterceptPage, remove, remove, render, render, renderComponent, renderComponent, renderComponentTag, rendered, renderHead, renderPlaceholderTag, replaceComponentTagBody, replaceWith, sameInnermostModel, sameInnermostModel, setAuto, setComponentBorder, setDefaultModelObject, setEnabled, setEscapeModelStrings, setFlag, setFlag, setIgnoreAttributeModifier, setMarkupId, setMarkupIdImpl, setMarkupStream, setMetaData, setOutputMarkupId, setOutputMarkupPlaceholderTag, setRedirect, setRenderBodyOnly, setResponsePage, setResponsePage, setResponsePage, setVersioned, setVisibilityAllowed, setVisible, toString, toString, urlFor, 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

Image

public Image(java.lang.String id)

This constructor can be used if you have a img tag that has a src that points to a PackageResource (which will be created and bind to the shared resources) Or if you have a value attribute in your tag for which the image factory can make an image.

See Also:

Component.Component(String)

Image

public Image(java.lang.String id,
             ResourceReference resourceReference)

Constructs an image from an image resourcereference. That resource reference will bind its resource to the current SharedResources. If you are using non sticky session clustering and the resource reference is pointing to a Resource that isn't guaranteed to be on every server, for example a dynamic image or resources that aren't added with a IInitializer at application startup. Then if only that resource is requested from another server, without the rendering of the page, the image won't be there and will result in a broken link.

Parameters:

id - See Component

resourceReference - The shared image resource

Image

public Image(java.lang.String id,
             ResourceReference resourceReference,
             ValueMap resourceParameters)

Constructs an image from an image resourcereference. That resource reference will bind its resource to the current SharedResources. If you are using non sticky session clustering and the resource reference is pointing to a Resource that isn't guaranteed to be on every server, for example a dynamic image or resources that aren't added with a IInitializer at application startup. Then if only that resource is requested from another server, without the rendering of the page, the image won't be there and will result in a broken link.

Parameters:

id - See Component

resourceReference - The shared image resource

resourceParameters - The resource parameters

Image

public Image(java.lang.String id,
             Resource imageResource)

Constructs an image directly from an image resource. This one doesn't have the 'non sticky session clustering' problem that the ResourceReference constructor has. But this will result in a non 'stable' url and the url will have request parameters.

Parameters:

id - See Component

imageResource - The image resource

Image

public Image(java.lang.String id,
             IModel<?> model)

See Also:

Component.Component(String, IModel)

Image

public Image(java.lang.String id,
             java.lang.String string)

Parameters:

id - See Component

string - Name of image

See Also:

Component.Component(String, IModel)

Method Detail

onResourceRequested

public void onResourceRequested()

Description copied from interface: IResourceListener

Called when a resource is requested.

Specified by:

onResourceRequested in interface IResourceListener

See Also:

IResourceListener.onResourceRequested()

setImageResource

public void setImageResource(Resource imageResource)

Parameters:

imageResource - The new ImageResource to set.

setImageResourceReference

public void setImageResourceReference(ResourceReference resourceReference)

Parameters:

resourceReference - The shared ImageResource to set.

setImageResourceReference

public void setImageResourceReference(ResourceReference resourceReference,
                                      ValueMap parameters)

Parameters:

resourceReference - The shared ImageResource to set.

parameters - Set the resource parameters for the resource.

setDefaultModel

public Component setDefaultModel(IModel<?> model)

Description copied from class: Component

Sets the given model.

WARNING: DO NOT OVERRIDE THIS METHOD UNLESS YOU HAVE A VERY GOOD REASON FOR IT. OVERRIDING THIS MIGHT OPEN UP SECURITY LEAKS AND BREAK BACK-BUTTON SUPPORT.

Overrides:

setDefaultModel in class Component

Parameters:

model - The model

Returns:

This

See Also:

Component.setDefaultModel(org.apache.wicket.model.IModel)

getImageResource

protected Resource getImageResource()

Returns:

Resource returned from subclass

getImageResourceReference

protected ResourceReference getImageResourceReference()

Returns:

ResourceReference returned from subclass

initModel

protected IModel<?> initModel()

Description copied from class: Component

Called when a null model is about to be retrieved in order to allow a subclass to provide an initial model. This gives FormComponent, for example, an opportunity to instantiate a model on the fly using the containing Form's model.

Overrides:

initModel in class Component

Returns:

The model

See Also:

Component.initModel()

onComponentTag

protected void onComponentTag(ComponentTag tag)

Description copied from class: Component

Processes the component tag.

Overrides:

onComponentTag in class Component

Parameters:

tag - Tag to modify

See Also:

Component.onComponentTag(ComponentTag)

getStatelessHint

protected boolean getStatelessHint()

Description copied from class: Component

Returns whether the component can be stateless. Also the component behaviors must be stateless, otherwise the component will be treat as stateful. In order for page to be stateless (and not to be stored in session), all components (and component behaviors) must be stateless.

Overrides:

getStatelessHint in class Component

Returns:

whether the component can be stateless

See Also:

Component.getStatelessHint()

onComponentTagBody

protected void onComponentTagBody(MarkupStream markupStream,
                                  ComponentTag openTag)

Description copied from class: Component

Processes the body.

Overrides:

onComponentTagBody in class Component

Parameters:

markupStream - The markup stream

openTag - The open tag for the body

See Also:

Component.onComponentTagBody(MarkupStream, ComponentTag)