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java.lang.Objectcom.google.gwt.user.client.ui.UIObject
com.google.gwt.user.client.ui.Widget
The base class for the majority of user-interface objects. Widget adds
support for receiving events from the browser and being added directly to
panels.
| Constructor Summary | |
Widget()
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| Method Summary | |
Widget |
getParent()
Gets this widget's parent panel. |
boolean |
isAttached()
Determines whether this widget is currently attached to the browser's document (i.e., there is an unbroken chain of widgets between this widget and the underlying browser document). |
protected void |
onAttach()
This method is called when a widget is attached to the browser's document. |
void |
onBrowserEvent(Event event)
Fired whenever a browser event is received. |
protected void |
onDetach()
This method is called when a widget is detached from the browser's document. |
protected void |
onLoad()
This method is called when the widget becomes attached to the browser's document. |
void |
removeFromParent()
Removes this widget from its parent widget. |
| Methods inherited from class com.google.gwt.user.client.ui.UIObject |
addStyleName, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleName, getTitle, isVisible, isVisible, removeStyleName, setElement, setHeight, setPixelSize, setSize, setStyleName, setStyleName, setTitle, setVisible, setVisible, setWidth, sinkEvents, toString, unsinkEvents |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
public Widget()
| Method Detail |
public Widget getParent()
public boolean isAttached()
true if the widget is attachedpublic void onBrowserEvent(Event event)
EventListener
onBrowserEvent in interface EventListenerevent - the event receivedprotected void onLoad()
protected void onAttach()
Panel. To receive
notification when a widget is attached to the document, override the
onLoad() method.
protected void onDetach()
Panel.
public void removeFromParent()
java.lang.IllegalStateException - if this widget's parent does not support
removal (e.g. Composite)
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