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com.google.gwt.user.client.ui
Class ValueLabel<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.LabelBase<T>
              extended by com.google.gwt.user.client.ui.ValueLabel<T>
Type Parameters:
T - the value type.
All Implemented Interfaces:
IsEditor<LeafValueEditor<T>>, HasAttachHandlers, HasHandlers, HasDirectionEstimator, EventListener, TakesValue<T>, HasAutoHorizontalAlignment, HasHorizontalAlignment, HasVisibility, HasWordWrap, IsWidget
Direct Known Subclasses:
DateLabel, NumberLabel
public class ValueLabel<T>
extends LabelBase<T>
implements TakesValue<T>, IsEditor<LeafValueEditor<T>>

A label displaying its value through a renderer.

Nested Class Summary
 
Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject
UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled
 
Nested classes/interfaces inherited from interface com.google.gwt.user.client.ui.HasHorizontalAlignment
HasHorizontalAlignment.AutoHorizontalAlignmentConstant, HasHorizontalAlignment.HorizontalAlignmentConstant
 
Field Summary
 
Fields inherited from class com.google.gwt.user.client.ui.LabelBase
directionalTextHelper
 
Fields inherited from class com.google.gwt.user.client.ui.Widget
eventsToSink
 
Fields inherited from class com.google.gwt.user.client.ui.UIObject
DEBUG_ID_PREFIX, MISSING_ELEMENT_ERROR, SETELEMENT_TWICE_ERROR
 
Fields inherited from interface com.google.gwt.user.client.ui.HasAutoHorizontalAlignment
ALIGN_CONTENT_END, ALIGN_CONTENT_START
 
Fields inherited from interface com.google.gwt.user.client.ui.HasHorizontalAlignment
ALIGN_CENTER, ALIGN_DEFAULT, ALIGN_JUSTIFY, ALIGN_LEFT, ALIGN_LOCALE_END, ALIGN_LOCALE_START, ALIGN_RIGHT
 
Constructor Summary
  ValueLabel()
           
protected ValueLabel(Element element, Renderer<? super T> renderer)
          This constructor may be used by subclasses to explicitly use an existing element.
  ValueLabel(Renderer<? super T> renderer)
          Creates an empty value label.
 
Method Summary
 LeafValueEditor<T> asEditor()
          Returns the Editor encapsulated by the view object.
 T getValue()
          Returns the current value.
 void setValue(T value)
          Sets the value.
static
<T> ValueLabel<T>
wrap(Element element, Renderer<? super T> renderer)
          Creates a ValueLabel widget that wraps an existing <span> element.
static
<T> ValueLabel<T>
wrap(Element element, Renderer<? super T> renderer, Parser<? extends T> parser)
          Creates a ValueLabel widget that wraps an existing <span> element.
 
Methods inherited from class com.google.gwt.user.client.ui.LabelBase
getAutoHorizontalAlignment, getDirectionEstimator, getHorizontalAlignment, getWordWrap, setAutoHorizontalAlignment, setDirectionEstimator, setDirectionEstimator, setHorizontalAlignment, setWordWrap, updateHorizontalAlignment
 
Methods inherited from class com.google.gwt.user.client.ui.Widget
addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, doAttachChildren, doDetachChildren, ensureHandlers, fireEvent, getHandlerCount, getHandlerManager, getLayoutData, getParent, isAttached, isOrWasAttached, onAttach, onBrowserEvent, onDetach, onLoad, onUnload, removeFromParent, replaceElement, setLayoutData, setParent, sinkEvents, unsinkEvents
 
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, resolvePotentialElement, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ValueLabel

public ValueLabel()

ValueLabel

@UiConstructor
public ValueLabel(Renderer<? super T> renderer)
Creates an empty value label.

Parameters:
renderer -

ValueLabel

protected ValueLabel(Element element,
                     Renderer<? super T> renderer)
This constructor may be used by subclasses to explicitly use an existing element. This element must be either a <span> or a <div> element.

Parameters:
element - the element to be used
Method Detail

wrap

public static <T> ValueLabel<T> wrap(Element element,
                                     Renderer<? super T> renderer)
Creates a ValueLabel widget that wraps an existing <span> element.

The ValueLabel's value will be null, whether the element being wrapped has content or not. Use wrap(Element, Renderer, Parser) to parse the initial element's content to initialize the ValueLabel's value.

This element must already be attached to the document. If the element is removed from the document, you must call RootPanel.detachNow(Widget).

Parameters:
element - the element to be wrapped
renderer - the renderer used to render values into the element

wrap

public static <T> ValueLabel<T> wrap(Element element,
                                     Renderer<? super T> renderer,
                                     Parser<? extends T> parser)
                          throws java.text.ParseException
Creates a ValueLabel widget that wraps an existing <span> element.

The ValueLabel's value will be initialized with the element's content, passed through the parser.

This element must already be attached to the document. If the element is removed from the document, you must call RootPanel.detachNow(Widget).

Parameters:
element - the element to be wrapped
renderer - the renderer used to render values into the element
parser - the parser used to initialize the ValueLabel's value from the element's content
Throws:
java.text.ParseException

asEditor

public LeafValueEditor<T> asEditor()
Description copied from interface: IsEditor
Returns the Editor encapsulated by the view object.

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

getValue

public T getValue()
Description copied from interface: TakesValue
Returns the current value.

Specified by:
getValue in interface TakesValue<T>
Returns:
the value as an object of type V
See Also:
TakesValue.setValue(V)

setValue

public void setValue(T value)
Description copied from interface: TakesValue
Sets the value.

Specified by:
setValue in interface TakesValue<T>
Parameters:
value - a value object of type V
See Also:
TakesValue.getValue()
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