- groovy.util.ObservableList.ChangeType
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Field Summary
Fields
Modifiers |
Name |
Description |
static Object |
newValue |
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static Object |
oldValue |
List decorator that will trigger PropertyChangeEvents when a value changes. |
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Methods Summary
Methods
Type Params |
Return Type |
Name and description |
|
static ChangeType |
resolve(int ordinal)
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Inherited Methods Summary
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Field Detail
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public static final Object newValue
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public static final Object oldValue
List decorator that will trigger PropertyChangeEvents when a value changes.
An optional Closure may be specified and will work as a filter, if it returns true the property
will trigger an event (if the value indeed changed), otherwise it won't. The Closure may receive
1 or 2 parameters, the single one being the value, the other one both the key and value, for
example:
// skip all properties whose value is a closure
def map = new ObservableList( {!(it instanceof Closure)} )
// skip all properties whose name matches a regex
def map = new ObservableList( { name, value -> !(name =˜ /[A-Z+]/) } )
The current implementation will trigger specialized events in the following scenarios, you need
not register a different listener as those events extend from PropertyChangeEvent
- ObservableList.ElementAddedEvent - a new element is added to the list
- ObservableList.ElementRemovedEvent - an element is removed from the list
- ObservableList.ElementUpdatedEvent - an element changes value (same as regular
PropertyChangeEvent)
- ObservableList.ElementClearedEvent - all elements have been removed from the list
- ObservableList.MultiElementAddedEvent - triggered by calling list.addAll()
- ObservableList.MultiElementRemovedEvent - triggered by calling
list.removeAll()/list.retainAll()
Bound properties
- content - read-only.
- size - read-only.
- Authors:
- Andres Almiray
Copyright © 2003-2018 The Apache Software Foundation. All rights reserved.