org.apache.tapestry.html
Class Rollover

java.lang.Object
  org.apache.tapestry.spec.BaseLocatable
      org.apache.tapestry.AbstractComponent
          org.apache.tapestry.html.Rollover

All Implemented Interfaces:

IComponent, ILocatable, ILocationHolder, IRender

public abstract class Rollover
extends AbstractComponent

Combines a link component (such as DirectLink) with an <img> and JavaScript code to create a rollover effect that works with both Netscape Navigator and Internet Explorer. [Component Reference]

Version:

$Id: Rollover.java 243791 2004-02-19 17:38:13Z hlship $

Author:

Howard Lewis Ship

Constructor Summary

Rollover()

Method Summary

protected String	getAssetURL(IAsset asset, IRequestCycle cycle) Converts an IAsset binding into a usable URL.
abstract IAsset	getBlur()
abstract IAsset	getDisabled()
abstract IAsset	getFocus()
abstract IAsset	getImage()
protected void	renderComponent(IMarkupWriter writer, IRequestCycle cycle) Invoked by AbstractComponent.render(IMarkupWriter, IRequestCycle) to actually render the component (with any parameter values already set).

Methods inherited from class org.apache.tapestry.AbstractComponent

addAsset, addBody, addComponent, cleanupAfterRender, finishLoad, finishLoad, fireObservedChange, fireObservedChange, fireObservedChange, fireObservedChange, fireObservedChange, fireObservedChange, fireObservedChange, fireObservedChange, fireObservedChange, format, format, format, format, formatString, formatString, formatString, formatString, generateAttributes, getAsset, getAssets, getBeans, getBinding, getBindingNames, getBindings, getBody, getBodyCount, getChangeObserver, getComponent, getComponents, getContainer, getExtendedId, getId, getIdPath, getListeners, getMessage, getMessages, getNamespace, getPage, getProperty, getSpecification, getString, pageEndRender, prepareForRender, render, renderBody, renderInformalParameters, setBinding, setContainer, setId, setNamespace, setPage, setProperty, setSpecification, toString

Methods inherited from class org.apache.tapestry.spec.BaseLocatable

getLocation, setLocation

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tapestry.ILocationHolder

setLocation

Methods inherited from interface org.apache.tapestry.ILocatable

getLocation

Constructor Detail

Rollover

public Rollover()

Method Detail

getAssetURL

protected String getAssetURL(IAsset asset,
                             IRequestCycle cycle)

Converts an IAsset binding into a usable URL. Returns null if the binding does not exist or the binding's value is null.

renderComponent

protected void renderComponent(IMarkupWriter writer,
                               IRequestCycle cycle)

Description copied from class: AbstractComponent

Invoked by AbstractComponent.render(IMarkupWriter, IRequestCycle) to actually render the component (with any parameter values already set). This is the method that subclasses must implement.

Specified by:

renderComponent in class AbstractComponent

getBlur

public abstract IAsset getBlur()

getDisabled

public abstract IAsset getDisabled()

getFocus

public abstract IAsset getFocus()

getImage

public abstract IAsset getImage()