ValueLabel (GWT Javadoc)

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## com.google.gwt.user.client.ui
Class ValueLabel<T>

    java.lang.Object
      com.google.gwt.user.client.ui.UIObject
          com.google.gwt.user.client.ui.Widget
              com.google.gwt.user.client.ui.LabelBase<T>
                  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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