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

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.FocusWidget
              extended by com.google.gwt.user.client.ui.ButtonBase
                  extended by 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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GWT 2.7.0
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