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com.google.gwt.user.client.ui
Class ValueListBox<T>

java.lang.Object
  extended by com.google.gwt.user.client.ui.UIObject
      extended by com.google.gwt.user.client.ui.Widget
          extended by com.google.gwt.user.client.ui.Composite
              extended by com.google.gwt.user.client.ui.ValueListBox<T>
Type Parameters:
T - the value type
All Implemented Interfaces:
IsEditor<TakesValueEditor<T>>, HasAttachHandlers, HasValueChangeHandlers<T>, HasHandlers, EventListener, TakesValue<T>, HasConstrainedValue<T>, HasValue<T>, HasVisibility, IsRenderable, IsWidget
public class ValueListBox<T>
extends Composite
implements HasConstrainedValue<T>, IsEditor<TakesValueEditor<T>>

Implementation of HasConstrainedValue based on a SelectElement.

A Renderer is used to get user-presentable strings to display in the select element.

Nested Class Summary
 
Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject
UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled
 
Field Summary
 
Fields inherited from class com.google.gwt.user.client.ui.UIObject
DEBUG_ID_PREFIX
 
Constructor Summary
ValueListBox(Renderer<T> renderer)
           
ValueListBox(Renderer<T> renderer, ProvidesKey<T> keyProvider)
           
 
Method Summary
 HandlerRegistration addValueChangeHandler(ValueChangeHandler<T> handler)
          Adds a ValueChangeEvent handler.
 TakesValueEditor<T> asEditor()
          Returns a TakesValueEditor backed by the ValueListBox.
 T getValue()
          Gets this object's value.
 void setAcceptableValues(java.util.Collection<T> newValues)
          Set the acceptable values.
 void setValue(T value)
          Set the value and display it in the select element.
 void setValue(T value, boolean fireEvents)
          Sets this object's value.
 
Methods inherited from class com.google.gwt.user.client.ui.Composite
getWidget, initWidget, isAttached, onAttach, onBrowserEvent, onDetach, performDetachedInitialization, render, render, resolvePotentialElement, setWidget, wrapElement
 
Methods inherited from class com.google.gwt.user.client.ui.Widget
addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, doAttachChildren, doDetachChildren, fireEvent, getHandlerCount, getLayoutData, getParent, isOrWasAttached, onLoad, onUnload, removeFromParent, setLayoutData, sinkEvents
 
Methods inherited from class com.google.gwt.user.client.ui.UIObject
addStyleDependentName, addStyleName, ensureDebugId, ensureDebugId, ensureDebugId, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString, unsinkEvents
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface com.google.gwt.event.shared.HasHandlers
fireEvent
 

Constructor Detail

ValueListBox

public ValueListBox(Renderer<T> renderer)

ValueListBox

public ValueListBox(Renderer<T> renderer,
                    ProvidesKey<T> keyProvider)
Method Detail

addValueChangeHandler

public HandlerRegistration addValueChangeHandler(ValueChangeHandler<T> handler)
Description copied from interface: HasValueChangeHandlers
Adds a ValueChangeEvent handler.

Specified by:
addValueChangeHandler in interface HasValueChangeHandlers<T>
Parameters:
handler - the handler
Returns:
the registration for the event

asEditor

public TakesValueEditor<T> asEditor()
Returns a TakesValueEditor backed by the ValueListBox.

Specified by:
asEditor in interface IsEditor<TakesValueEditor<T>>
Returns:
an Editor of type E

getValue

public T getValue()
Description copied from interface: HasValue
Gets this object's value.

Specified by:
getValue in interface TakesValue<T>
Specified by:
getValue in interface HasValue<T>
Returns:
the object's value
See Also:
TakesValue.setValue(V)

setAcceptableValues

public void setAcceptableValues(java.util.Collection<T> newValues)
Description copied from interface: HasConstrainedValue
Set the acceptable values.

Specified by:
setAcceptableValues in interface HasConstrainedValue<T>
Parameters:
newValues - the acceptible values

setValue

public void setValue(T value)
Set the value and display it in the select element. Add the value to the acceptable set if it is not already there.

Specified by:
setValue in interface TakesValue<T>
Specified by:
setValue in interface HasValue<T>
Parameters:
value - the object's new value
See Also:
TakesValue.getValue()

setValue

public void setValue(T value,
                     boolean fireEvents)
Description copied from interface: HasValue
Sets this object's value. Fires ValueChangeEvent when fireEvents is true and the new value does not equal the existing value.

It is acceptable to fail assertions or throw (documented) unchecked exceptions in response to bad values.

Specified by:
setValue in interface HasValue<T>
Parameters:
value - the object's new value
fireEvents - fire events if true and value is new
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