net.sf.click.control
Class OptionGroup

java.lang.Object
  net.sf.click.control.OptionGroup

All Implemented Interfaces:

Serializable

public class OptionGroup

extends Object

implements Serializable

Provides a select Option Group element: <optgroup></optgroup>.

The OptionGroup class uses an immutable design so Option instances can be shared by multiple Pages in the multi-threaded Servlet environment. This enables OptionGroup instances to be cached as static variables.

For an OptionGroup code example see the Option Javadoc example.

See also the W3C HTML reference: OPTGROUP

Author:

Malcolm Edgar

See Also:

Select, Option, Serialized Form

Field Summary

protected List	children The groups child Option/OptGroup objects.
protected String	label The label for the OptionGroup.

Constructor Summary

OptionGroup(String label)
Create an OptionGroup with the given display label.

Method Summary

void	add(Object object) Add the given Option or OptionGroup object to this group.
List	getChildren() Return the OptionGroup children.
String	getLabel() Return the display label.
String	getTag() Return the OptionGroups's html tag: optgroup.
void	render(Select select, HtmlStringBuffer buffer) Return a HTML rendered Option string.
String	renderHTML(Select select) Deprecated. use render(net.sf.click.control.Select, net.sf.click.util.HtmlStringBuffer) instead

Methods inherited from class java.lang.Object

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

Field Detail

children

protected List children

The groups child Option/OptGroup objects.

label

protected final String label

The label for the OptionGroup.

Constructor Detail

OptionGroup

public OptionGroup(String label)

Create an OptionGroup with the given display label.

Parameters:

label - the display label for the OptionGroup

Method Detail

getTag

public String getTag()

Return the OptionGroups's html tag: optgroup.

Returns:

the OptionGroup's html tag

add

public void add(Object object)

Add the given Option or OptionGroup object to this group.

Parameters:

object - the Option or OptionGroup to add

getChildren

public List getChildren()

Return the OptionGroup children.

Returns:

the OptionGroup children

getLabel

public String getLabel()

Return the display label.

Returns:

the display label

render

public void render(Select select,
                   HtmlStringBuffer buffer)

Return a HTML rendered Option string.

Parameters:

select - the parent Select

buffer - the specified buffer to render to

renderHTML

public String renderHTML(Select select)

Deprecated. use render(net.sf.click.control.Select, net.sf.click.util.HtmlStringBuffer) instead

Return a HTML rendered OptionGroup string.

Parameters:

select - the parent Select

Returns:

a rendered HTML OptionGroup string