org.loom.tags.menu
Class NestedMenuDecorator

java.lang.Object
  org.loom.tags.menu.AbstractMenuDecorator
      org.loom.tags.menu.NestedMenuDecorator

All Implemented Interfaces:

TagDecorator<MenuTag>

public class NestedMenuDecorator
extends AbstractMenuDecorator

Decorates menu items as a list (ul) of nested menu items and submenus.

Constructor Summary

NestedMenuDecorator()

Method Summary

void	afterDoTag(MenuTag tag)
boolean	beforeDoTag(MenuTag tag)
java.lang.String	calculateCss(MenuItemData item, MenuItemData selectedItem) Calculate the css class of this menuItem.
boolean	isRenderEmptyItems()
java.lang.String	renderMenuItem(MenuTag tag, MenuItemData item, MenuItemData selectedItem) Return the string that represents this menu item, empty if it should not be rendered
void	setRenderEmptyItems(boolean renderEmptyItems)

Methods inherited from class org.loom.tags.menu.AbstractMenuDecorator

isRenderUnauthorizedItems, setRenderUnauthorizedItems

Methods inherited from class java.lang.Object

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

Constructor Detail

NestedMenuDecorator

public NestedMenuDecorator()

Method Detail

beforeDoTag

public boolean beforeDoTag(MenuTag tag)
                    throws java.io.IOException,
                           javax.servlet.jsp.JspException

Returns:

true to execute the tag afterwards, false to skip the tag. If false, the afterDoTag method will not be triggered.

Throws:

java.io.IOException

javax.servlet.jsp.JspException

afterDoTag

public void afterDoTag(MenuTag tag)
                throws java.io.IOException,
                       javax.servlet.jsp.JspException

Throws:

java.io.IOException

javax.servlet.jsp.JspException

renderMenuItem

public java.lang.String renderMenuItem(MenuTag tag,
                                       MenuItemData item,
                                       MenuItemData selectedItem)
                                throws java.io.IOException,
                                       javax.servlet.jsp.JspException

Return the string that represents this menu item, empty if it should not be rendered

Parameters:

item - the current item being printed

selectedItem - the currently selected item in this menu

Throws:

java.io.IOException

javax.servlet.jsp.JspException

calculateCss

public java.lang.String calculateCss(MenuItemData item,
                                     MenuItemData selectedItem)

Calculate the css class of this menuItem. This method adds the following css classes:

• selected if this is the currently selected item
• submenu if this menu item has a nested submenu below

All menuItem classes are also expanded because of accessibility: in a world without javascript, all menu items should be displayed expanded, so we collapse the unselected items using javascript instead of the other way.

isRenderEmptyItems

public boolean isRenderEmptyItems()

setRenderEmptyItems

public void setRenderEmptyItems(boolean renderEmptyItems)