org.apache.tapestry.form
Class AbstractTextField

java.lang.Object
  org.apache.tapestry.spec.BaseLocatable
      org.apache.tapestry.AbstractComponent
          org.apache.tapestry.form.AbstractFormComponent
              org.apache.tapestry.form.AbstractTextField

All Implemented Interfaces:

IFormComponent, IComponent, ILocatable, ILocationHolder, IRender

Direct Known Subclasses:

TextField, ValidField

public abstract class AbstractTextField
extends AbstractFormComponent

Base class for implementing various types of text input fields. This includes TextField and ValidField.

Since:

1.0.2

Version:

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

Author:

Howard Lewis Ship

Constructor Summary

AbstractTextField()

Method Summary

protected void	beforeCloseTag(IMarkupWriter writer, IRequestCycle cycle) Invoked from AbstractComponent.render(IMarkupWriter, IRequestCycle) just before the tag is closed.
abstract boolean	isDisabled() Returns true if the component is disabled.
abstract boolean	isHidden()
protected abstract String	readValue() Invoked by AbstractComponent.render(IMarkupWriter writer, IRequestCycle cycle) when rendering a response.
protected void	renderComponent(IMarkupWriter writer, IRequestCycle cycle) Renders the form element, or responds when the form containing the element is submitted (by checking Form.isRewinding().
protected abstract void	updateValue(String value) Invoked by AbstractComponent.render(IMarkupWriter writer, IRequestCycle cycle) when a value is obtained from the HttpServletRequest.

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

AbstractTextField

public AbstractTextField()

Method Detail

renderComponent

protected void renderComponent(IMarkupWriter writer,
                               IRequestCycle cycle)

Renders the form element, or responds when the form containing the element is submitted (by checking Form.isRewinding().

Specified by:

renderComponent in class AbstractComponent

beforeCloseTag

protected void beforeCloseTag(IMarkupWriter writer,
                              IRequestCycle cycle)

Invoked from AbstractComponent.render(IMarkupWriter, IRequestCycle) just before the tag is closed. This implementation does nothing, subclasses may override.

updateValue

protected abstract void updateValue(String value)

Invoked by AbstractComponent.render(IMarkupWriter writer, IRequestCycle cycle) when a value is obtained from the HttpServletRequest.

readValue

protected abstract String readValue()

Invoked by AbstractComponent.render(IMarkupWriter writer, IRequestCycle cycle) when rendering a response.

Returns:

the current value for the field, as a String, or null.

isHidden

public abstract boolean isHidden()

isDisabled

public abstract 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.