org.apache.tapestry.contrib.form
Class FormConditional

java.lang.Object
  extended by org.apache.tapestry.spec.BaseLocatable
      extended by org.apache.tapestry.AbstractComponent
          extended by org.apache.tapestry.form.AbstractFormComponent
              extended by org.apache.tapestry.contrib.form.FormConditional
All Implemented Interfaces:
IFormComponent, IComponent, ILocatable, ILocationHolder, IRender

public abstract class FormConditional
extends AbstractFormComponent

A conditional element on a page which will render its wrapped elements zero or one times. This component is a variant of Conditional, but is designed for operation in a form. The component parameters are stored in hidden fields during rendering and are taken from those fields during the rewind, thus no StaleLink exceptions occur. [Component Reference]

Since:
3.0
Version:
$Id: FormConditional.java 244169 2005-03-17 08:33:21Z pferraro $
Author:
Mindbridge

Constructor Summary
FormConditional()
           
 
Method Summary
abstract  boolean getCondition()
           
abstract  IBinding getConditionValueBinding()
           
abstract  String getElement()
           
abstract  IActionListener getListener()
           
 boolean isDisabled()
          Returns true if the component is disabled.
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.form.AbstractFormComponent
getDisplayName, getForm, getForm, getName, setForm, setName
 
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.IComponent
addAsset, addBody, addComponent, finishLoad, getAsset, getAssets, getBinding, getBindingNames, getBindings, getComponent, getComponents, getContainer, getExtendedId, getId, getIdPath, getMessage, getMessages, getNamespace, getPage, getProperty, getSpecification, getString, renderBody, setBinding, setContainer, setId, setNamespace, setPage, setProperty, setSpecification
 
Methods inherited from interface org.apache.tapestry.IRender
render
 
Methods inherited from interface org.apache.tapestry.ILocationHolder
setLocation
 
Methods inherited from interface org.apache.tapestry.ILocatable
getLocation
 

Constructor Detail

FormConditional

public FormConditional()
Method Detail

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

isDisabled

public boolean isDisabled()
Description copied from interface: IFormComponent
Returns true if the component is disabled. This is important when the containing form is submitted, since disabled parameters do not update their bindings.


getCondition

public abstract boolean getCondition()

getElement

public abstract String getElement()

getConditionValueBinding

public abstract IBinding getConditionValueBinding()

getListener

public abstract IActionListener getListener()