org.apache.click
Interface Behavior

All Known Subinterfaces:

AjaxBehavior

All Known Implementing Classes:

DefaultAjaxBehavior

public interface Behavior

Behaviors provide a mechanism for changing how Controls behave at runtime. Behaviors are added to a Control and provides interceptor methods to decorate and enhance the source Control.

Behaviors provide interceptor methods for specific Control life cycle events. These interceptor methods can be implemented to further process and decorate the control or its children.

The following interceptor methods are defined:

• preResponse - occurs before the control markup is written to the response
• preRenderHeadElements - occurs after preResponse but before the control HEAD elements are written to the response
• preDestroy - occurs before the Control onDestroy event handler.

These interceptor methods allow the Behavior to decorate a control, for example:

• add or remove Control HEAD elements such as JavaScript and CSS dependencies and setup scripts
• add or remove Control attributes such as "class", "style" etc.

Method Summary

void	preDestroy(Control source) This event occurs before the Control onDestroy event handler.
void	preRenderHeadElements(Control source) This event occurs after preResponse(org.apache.click.Control), but before the Control's Control.getHeadElements() is called.
void	preResponse(Control source) This event occurs before the markup is written to the HttpServletResponse.

Method Detail

preResponse

void preResponse(Control source)

This event occurs before the markup is written to the HttpServletResponse.

Parameters:

source - the control the behavior is registered with

preRenderHeadElements

void preRenderHeadElements(Control source)

This event occurs after preResponse(org.apache.click.Control), but before the Control's Control.getHeadElements() is called.

Parameters:

source - the control the behavior is registered with

preDestroy

void preDestroy(Control source)

This event occurs before the Control onDestroy event handler. This event allows the behavior to cleanup or store Control state in the Session.

Parameters:

source - the control the behavior is registered with