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

java.lang.Object
  com.google.gwt.user.client.ui.UIObject
      com.google.gwt.user.client.ui.Widget
          com.google.gwt.user.client.ui.Panel
              com.google.gwt.user.client.ui.SimplePanel

All Implemented Interfaces:

EventListener, HasWidgets

Direct Known Subclasses:

FocusPanel, PopupPanel, ScrollPanel

public abstract class SimplePanel

extends Panel

Abstract base class for panels that contain only one widget.

Field Summary

Fields inherited from class java.lang.Object

typeId, typeName

Constructor Summary

protected	SimplePanel() Creates an empty panel that uses a DIV for its contents.
protected	SimplePanel(Element elem) Creates an empty panel that uses the specified browser element for its contents.

Method Summary

boolean	add(Widget w) Adds a new child widget to the panel.
void	clear() Removes all widgets from this panel.
protected Element	getContainerElement() Override this method to specify that an element other than the root element be the container for the panel's child widget.
Widget	getWidget(int index)
int	getWidgetCount()
int	getWidgetIndex(Widget child)
Iterator	iterator() Gets an iterator for the contained widgets.
boolean	remove(Widget w) Removes a widget from the panel.
protected void	setWidget(Widget w)

Methods inherited from class com.google.gwt.user.client.ui.Panel

adopt, disown, onAttach, onDetach

Methods inherited from class com.google.gwt.user.client.ui.Widget

getParent, isAttached, onBrowserEvent, onLoad

Methods inherited from class com.google.gwt.user.client.ui.UIObject

addStyleName, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleName, isVisible, isVisible, removeStyleName, setElement, setHeight, setPixelSize, setSize, setStyleName, setStyleName, setVisible, setVisible, setWidth, sinkEvents, toString, unsinkEvents

Methods inherited from class java.lang.Object

equals, finalize, hashCode

Constructor Detail

SimplePanel

protected SimplePanel()

Creates an empty panel that uses a DIV for its contents.

SimplePanel

protected SimplePanel(Element elem)

Creates an empty panel that uses the specified browser element for its contents.

Method Detail

add

public boolean add(Widget w)

Description copied from class: Panel

Adds a new child widget to the panel.

Specified by:

add in class Panel

Parameters:

w - the child widget to be added

Returns:

true on success (some panels place restrictions on how children may be added or inserted)

clear

public void clear()

Description copied from class: Panel

Removes all widgets from this panel.

Specified by:

clear in class Panel

getWidget

public Widget getWidget(int index)

getWidgetCount

public int getWidgetCount()

getWidgetIndex

public int getWidgetIndex(Widget child)

iterator

public Iterator iterator()

Description copied from interface: HasWidgets

Gets an iterator for the contained widgets.

remove

public boolean remove(Widget w)

Description copied from class: Panel

Removes a widget from the panel.

Specified by:

remove in class Panel

Parameters:

w - the widget to be removed

Returns:

true if the widget was present

getContainerElement

protected Element getContainerElement()

Override this method to specify that an element other than the root element be the container for the panel's child widget. This can be useful when you want to create a simple panel that decorates its contents.

Returns:

the element to be used as the panel's container

setWidget

protected void setWidget(Widget w)