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

java.lang.Object
  extended bycom.google.gwt.user.client.ui.UIObject
      extended bycom.google.gwt.user.client.ui.Widget
          extended bycom.google.gwt.user.client.ui.Panel
              extended bycom.google.gwt.user.client.ui.ComplexPanel
                  extended bycom.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.
protected  void disown(Widget w)
          Calls the superclass' disown(Widget) method, and sets the the positioning of the widget to static.
 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.
 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, getChildren, getWidget, getWidgetCount, getWidgetIndex, insert, iterator, remove, remove
 
Methods inherited from class com.google.gwt.user.client.ui.Panel
adopt, clear, onAttach, onDetach
 
Methods inherited from class com.google.gwt.user.client.ui.Widget
getParent, isAttached, onBrowserEvent, onLoad, onUnload, removeFromParent, setElement
 
Methods inherited from class com.google.gwt.user.client.ui.UIObject
addStyleName, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getTitle, isVisible, isVisible, removeStyleName, resetStyleName, 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

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

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

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

disown

protected void disown(Widget w)
Calls the superclass' disown(Widget) method, and sets the the positioning of the widget to static. 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.

Overrides:
disown in class Panel
Parameters:
w - the widget to be disowned