Module org.apache.wicket.core

Package org.apache.wicket.markup.head

Class OnEventHeaderItem

java.lang.Object

org.apache.wicket.markup.head.HeaderItem

org.apache.wicket.markup.head.AbstractCspHeaderItem

org.apache.wicket.markup.head.OnEventHeaderItem

All Implemented Interfaces:

Serializable, IClusterable

public class OnEventHeaderItem
extends AbstractCspHeaderItem

HeaderItem for event triggered scripts.

Author:

papegaaij

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
OnEventHeaderItem(String target, String event)	Constructor.
OnEventHeaderItem(String target, String event, CharSequence javaScript)	Construct.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
static OnEventHeaderItem	forComponent(Component target, String event, CharSequence javaScript)	Creates a OnEventHeaderItem for the given parameters.
static OnEventHeaderItem	forMarkupId(String id, String event, CharSequence javaScript)	Creates a OnEventHeaderItem for the given parameters.
static OnEventHeaderItem	forScript(String literalTarget, String event, CharSequence javaScript)	Creates a OnEventHeaderItem for the given parameters.
CharSequence	getCompleteJavaScript()
List<HeaderItem>	getDependencies()
String	getEvent()
CharSequence	getJavaScript()
Iterable<?>	getRenderTokens()
String	getTarget()
int	hashCode()
void	render(Response response)	Renders the HeaderItem to the response.
String	toString()

Methods inherited from class org.apache.wicket.markup.head.AbstractCspHeaderItem

getNonce, setNonce

Methods inherited from class org.apache.wicket.markup.head.HeaderItem

getProvidedResources

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

OnEventHeaderItem

public OnEventHeaderItem(String target,
 String event)

Constructor. The JavaScript should be provided by overloaded #getJavaScript

Parameters:

target -

event -

OnEventHeaderItem

public OnEventHeaderItem(String target,
 String event,
 CharSequence javaScript)

Construct.

Parameters:

target -

event -

javaScript -

Method Details

forScript

public static OnEventHeaderItem forScript(String literalTarget,
 String event,
 CharSequence javaScript)

Creates a OnEventHeaderItem for the given parameters.

Parameters:

literalTarget - The target of the event handler, for example 'window' or 'document'. Note that this parameter is a literal and will be rendered unquoted.

event - The event itself, for example 'click'.

javaScript - The script to execute on the event.

Returns:

A newly created OnEventHeaderItem.

See Also:

• forComponent(Component, String, CharSequence)
• forMarkupId(String, String, CharSequence)

forComponent

public static OnEventHeaderItem forComponent(Component target,
 String event,
 CharSequence javaScript)

Creates a OnEventHeaderItem for the given parameters.

Parameters:

target - The target component of the event handler.

event - The event itself, for example 'click'.

javaScript - The script to execute on the event.

Returns:

A newly created OnEventHeaderItem.

forMarkupId

public static OnEventHeaderItem forMarkupId(String id,
 String event,
 CharSequence javaScript)

Creates a OnEventHeaderItem for the given parameters.

Parameters:

id - The id of the component to bind the handler to.

event - The event itself, for example 'click'.

javaScript - The script to execute on the event.

Returns:

A newly created OnEventHeaderItem.

getTarget

public String getTarget()

Returns:

The target of the event handler, for example 'window' or 'document'.

getEvent

public String getEvent()

Returns:

The event itself, for example 'onclick'.

getJavaScript

public CharSequence getJavaScript()

Returns:

The script to execute on the event.

render

public void render(Response response)

Description copied from class: HeaderItem

Renders the HeaderItem to the response.

Specified by:

render in class HeaderItem

getCompleteJavaScript

public CharSequence getCompleteJavaScript()

Returns:

The JavaScript that registers the event handler.

getRenderTokens

public Iterable<?> getRenderTokens()

Specified by:

getRenderTokens in class HeaderItem

Returns:

The tokens this HeaderItem can be identified by. If any of the tokens has already been rendered, this HeaderItem will not be rendered.

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

getDependencies

public List<HeaderItem> getDependencies()

Overrides:

getDependencies in class HeaderItem

Returns:

The dependencies this HeaderItem has. Dependencies will always be rendered before the item itself.