org.zkoss.zul.ext

Interface Openable<E>

All Known Implementing Classes:

AbstractTreeModel, DefaultTreeModel

public interface Openable<E>

Indicate an openable collection.

Since 6.0.0, TreeOpenableModel was introduced to handle the open state of TreeModel for better performance. Thus, for handling tree's open states, please use TreeOpenableModel instead.

Author:

jimmyshiau

See Also:

TreeModel, Tree

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addOpenObject(E obj) Add the specified object into the collection of opened objects.
void	clearOpen() Clear all open status.
Set<E>	getOpenObjects() Returns the objects that are opened.
boolean	isObjectOpened(Object obj) Returns whether the specified object be opened.
boolean	isOpenEmpty() Returns true if the open is currently empty.
boolean	removeOpenObject(Object obj) Remove the specified object from selection.
void	setOpenObjects(Collection<? extends E> opens) Replace the current set of opened objects with the given set.

Method Detail

getOpenObjects

Set<E> getOpenObjects()

Returns the objects that are opened. It is readonly. Don't modify it directly

Since:

6.0.0

setOpenObjects

void setOpenObjects(Collection<? extends E> opens)

Replace the current set of opened objects with the given set.

Since:

6.0.0

isObjectOpened

boolean isObjectOpened(Object obj)

Returns whether the specified object be opened.

Parameters:

obj -

isOpenEmpty

boolean isOpenEmpty()

Returns true if the open is currently empty.

Since:

6.0.0

addOpenObject

boolean addOpenObject(E obj)

Add the specified object into the collection of opened objects.

Parameters:

obj - the object to be as selection.

Returns:

true if it is added successfully; false if obj is not part of the data, or was already opened.

Since:

6.0.0

removeOpenObject

boolean removeOpenObject(Object obj)

Remove the specified object from selection.

Parameters:

obj - the object to be remove from selection.

Returns:

whether it is removed successfully

Since:

6.0.0

clearOpen

void clearOpen()

Clear all open status.

Notice that this method is designed to be called by a component (such as Tree). If it is called by an application, the component's open status won't be changed.