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

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.ComplexPanel
                  com.google.gwt.user.client.ui.AbsolutePanel

All Implemented Interfaces:

EventListener, HasWidgets, IndexedPanel

Direct Known Subclasses:

RootPanel

public class AbsolutePanel
extends ComplexPanel

An absolute panel positions all of its children absolutely, allowing them to overlap.

Note that this panel will not automatically resize itself to allow enough room for its absolutely-positioned children. It must be explicitly sized in order to make room for them.

Once a widget has been added to an absolute panel, the panel effectively "owns" the positioning of the widget. Any existing positioning attributes on the widget may be modified by the panel.

Constructor Summary

AbsolutePanel()
Creates an empty absolute panel.

Method Summary

void	add(Widget w) Adds a child widget to this panel.
void	add(Widget w, int left, int top) Adds a widget to the panel at the specified position.
int	getWidgetLeft(Widget w) Gets the position of the left outer border edge of the widget relative to the left outer border edge of the panel.
int	getWidgetTop(Widget w) Gets the position of the top outer border edge of the widget relative to the top outer border edge of the panel.
boolean	remove(Widget w) Overrides ComplexPanel.remove(Widget) to change the removed Widget's element back to static positioning.This is done so that any positioning changes to the widget that were done by the panel are undone when the widget is disowned from the panel.
void	setWidgetPosition(Widget w, int left, int top) Sets the position of the specified child widget.

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

add, adjustIndex, checkIndexBoundsForAccess, checkIndexBoundsForInsertion, getChildren, getWidget, getWidgetCount, getWidgetIndex, insert, insert, iterator, remove

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

adopt, adopt, clear, disown, doAttachChildren, doDetachChildren, onLoad, onUnload, orphan

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

getParent, isAttached, onAttach, onBrowserEvent, onDetach, removeFromParent, setElement

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

addStyleDependentName, addStyleName, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, removeStyleDependentName, removeStyleName, setHeight, setPixelSize, setSize, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, 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

AbsolutePanel

public AbsolutePanel()

Creates an empty absolute panel.

Method Detail

add

public void add(Widget w)

Adds a child widget to this panel.

Specified by:

add in interface HasWidgets

Overrides:

add in class Panel

Parameters:

w - the child widget to be added

See Also:

HasWidgets.add(Widget)

add

public void add(Widget w,
                int left,
                int top)

Adds a widget to the panel at the specified position. Setting a position of (-1, -1) will cause the child widget to be positioned statically.

Parameters:

w - the widget to be added

left - the widget's left position

top - the widget's top position

getWidgetLeft

public int getWidgetLeft(Widget w)

Gets the position of the left outer border edge of the widget relative to the left outer border edge of the panel.

Parameters:

w - the widget whose position is to be retrieved

Returns:

the widget's left position

getWidgetTop

public int getWidgetTop(Widget w)

Gets the position of the top outer border edge of the widget relative to the top outer border edge of the panel.

Parameters:

w - the widget whose position is to be retrieved

Returns:

the widget's top position

remove

public boolean remove(Widget w)

Overrides ComplexPanel.remove(Widget) to change the removed Widget's element back to static positioning.This is done so that any positioning changes to the widget that were done by the panel are undone when the widget is disowned from the panel.

Specified by:

remove in interface HasWidgets

Overrides:

remove in class ComplexPanel

Parameters:

w - the widget to be removed

Returns:

true if the child was present

setWidgetPosition

public void setWidgetPosition(Widget w,
                              int left,
                              int top)

Sets the position of the specified child widget. Setting a position of (-1, -1) will cause the child widget to be positioned statically.

Parameters:

w - the child widget to be positioned

left - the widget's left position

top - the widget's top position