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## com.google.gwt.user.client.ui
Class Button

    java.lang.Object
      com.google.gwt.user.client.ui.UIObject
          com.google.gwt.user.client.ui.Widget
              com.google.gwt.user.client.ui.FocusWidget
                  com.google.gwt.user.client.ui.ButtonBase
                      com.google.gwt.user.client.ui.Button

All Implemented Interfaces:
  HasAllDragAndDropHandlers, HasAllFocusHandlers, HasAllGestureHandlers, HasAllKeyHandlers, HasAllMouseHandlers, HasAllTouchHandlers, HasBlurHandlers, HasClickHandlers, HasDoubleClickHandlers, HasDragEndHandlers, HasDragEnterHandlers, HasDragHandlers, HasDragLeaveHandlers, HasDragOverHandlers, HasDragStartHandlers, HasDropHandlers, HasFocusHandlers, HasGestureChangeHandlers, HasGestureEndHandlers, HasGestureStartHandlers, HasKeyDownHandlers, HasKeyPressHandlers, HasKeyUpHandlers, HasMouseDownHandlers, HasMouseMoveHandlers, HasMouseOutHandlers, HasMouseOverHandlers, HasMouseUpHandlers, HasMouseWheelHandlers, HasTouchCancelHandlers, HasTouchEndHandlers, HasTouchMoveHandlers, HasTouchStartHandlers, HasAttachHandlers, HasHandlers, HasSafeHtml, EventListener, Focusable, HasEnabled, HasFocus, HasHTML, HasText, HasVisibility, IsWidget, SourcesClickEvents, SourcesFocusEvents, SourcesKeyboardEvents, SourcesMouseEvents

Direct Known Subclasses:
  ResetButton, SubmitButton

    public class Button

extends ButtonBase

A standard push-button widget.

### CSS Style Rules

.gwt-Button
  the outer element

### Example

>     public class ButtonExample implements EntryPoint {

>       public void onModuleLoad() {
>         // Make a new button that does something when you click it.
>         Button b = new Button("Jump!", new ClickHandler() {
>           public void onClick(ClickEvent event) {
>             Window.alert("How high?");
>           }
>         });

>         // Add it to the root panel.
>         RootPanel.get().add(b);
>       }
>     }

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.Widget
`eventsToSink`

Fields inherited from class com.google.gwt.user.client.ui.UIObject
`DEBUG_ID_PREFIX, MISSING_ELEMENT_ERROR, SETELEMENT_TWICE_ERROR`

Constructor Summary
`` | `Button()` Creates a button with no caption.
`protected` | `Button(Element element)` This constructor may be used by subclasses to explicitly use an existing element.
`` | `Button(SafeHtml html)` Creates a button with the given HTML caption.
`` | `Button(SafeHtml html, ClickHandler handler)` Creates a button with the given HTML caption and click listener.
`` | `Button(java.lang.String html)` Creates a button with the given HTML caption.
`` | `Button(java.lang.String html, ClickHandler handler)` Creates a button with the given HTML caption and click listener.
`` | `Button(java.lang.String html, ClickListener listener)` Deprecated. Use `Button(String, ClickHandler)` instead

Method Summary
`void` | `click()` Programmatic equivalent of the user clicking the button.
`protected ButtonElement` | `getButtonElement()` Get the underlying button element.
`static Button` | `wrap(Element element)` Creates a Button widget that wraps an existing <button> element.

Methods inherited from class com.google.gwt.user.client.ui.ButtonBase
`getHTML, getText, setHTML, setHTML, setText`

Methods inherited from class com.google.gwt.user.client.ui.FocusWidget
`addBlurHandler, addClickHandler, addClickListener, addDoubleClickHandler, addDragEndHandler, addDragEnterHandler, addDragHandler, addDragLeaveHandler, addDragOverHandler, addDragStartHandler, addDropHandler, addFocusHandler, addFocusListener, addGestureChangeHandler, addGestureEndHandler, addGestureStartHandler, addKeyboardListener, addKeyDownHandler, addKeyPressHandler, addKeyUpHandler, addMouseDownHandler, addMouseListener, addMouseMoveHandler, addMouseOutHandler, addMouseOverHandler, addMouseUpHandler, addMouseWheelHandler, addMouseWheelListener, addTouchCancelHandler, addTouchEndHandler, addTouchMoveHandler, addTouchStartHandler, getFocusImpl, getTabIndex, isEnabled, onAttach, removeClickListener, removeFocusListener, removeKeyboardListener, removeMouseListener, removeMouseWheelListener, setAccessKey, setEnabled, setFocus, setTabIndex`

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, 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`

Methods inherited from interface com.google.gwt.event.shared.HasHandlers
`fireEvent`

Constructor Detail

### Button

    public Button()

  Creates a button with no caption.

### Button

    public Button(SafeHtml html)

  Creates a button with the given HTML caption.

  Parameters:
    `html` - the HTML caption

### Button

    public Button(java.lang.String html)

  Creates a button with the given HTML caption.

  Parameters:
    `html` - the HTML caption

### Button

    @Deprecated
    public Button(java.lang.String html,
                             ClickListener listener)

  Deprecated. Use `Button(String, ClickHandler)` instead

  Creates a button with the given HTML caption and click listener.

  Parameters:
    `html` - the HTML caption
    `listener` - the click listener

### Button

    public Button(SafeHtml html,
                  ClickHandler handler)

  Creates a button with the given HTML caption and click listener.

  Parameters:
    `html` - the html caption
    `handler` - the click handler

### Button

    public Button(java.lang.String html,
                  ClickHandler handler)

  Creates a button with the given HTML caption and click listener.

  Parameters:
    `html` - the HTML caption
    `handler` - the click handler

### Button

    protected Button(Element element)

  This constructor may be used by subclasses to explicitly use an existing element. This element must be a <button> element.

  Parameters:
    `element` - the element to be used

Method Detail

### wrap

    public static Button wrap(Element element)

  Creates a Button widget that wraps an existing <button> element. 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

### click

    public void click()

  Programmatic equivalent of the user clicking the button.

### getButtonElement

    protected ButtonElement getButtonElement()

  Get the underlying button element.

  Returns:
    the `ButtonElement`

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