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java.lang.Objectcom.google.gwt.user.client.ui.UIObject
com.google.gwt.user.client.ui.Widget
com.google.gwt.user.client.ui.Panel
public abstract class Panel
Abstract base class for all panels, which are widgets that can contain other widgets.
Constructor Summary | |
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Panel()
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Method Summary | |
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void |
add(Widget w)
Adds a child widget. |
protected void |
adopt(Widget w,
Element container)
This method must be called as part of the add method of any panel. |
void |
clear()
Removes all child widgets. |
protected void |
disown(Widget w)
This method must be called whenever a Widget is removed. |
protected void |
onAttach()
This method is called when a widget is attached to the browser's document. |
protected void |
onDetach()
This method is called when a widget is detached from the browser's document. |
Methods inherited from class com.google.gwt.user.client.ui.Widget |
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getParent, isAttached, onBrowserEvent, onLoad, removeFromParent |
Methods inherited from class com.google.gwt.user.client.ui.UIObject |
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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 |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface com.google.gwt.user.client.ui.HasWidgets |
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iterator, remove |
Constructor Detail |
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public Panel()
Method Detail |
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public void add(Widget w)
HasWidgets
add
in interface HasWidgets
w
- the widget to be addedpublic void clear()
HasWidgets
clear
in interface HasWidgets
protected void adopt(Widget w, Element container)
w
- the widget to be adoptedcontainer
- the element within which it will be containedprotected void disown(Widget w)
w
- the widget to be disownedprotected void onAttach()
Widget
Panel
. To receive
notification when a widget is attached to the document, override the
Widget.onLoad()
method.
onAttach
in class Widget
protected void onDetach()
Widget
Panel
.
onDetach
in class Widget
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