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java.awt
Class PopupMenu


java.lang.Object
  extended by java.awt.MenuComponent
      extended by java.awt.MenuItem
          extended by java.awt.Menu
              extended by java.awt.PopupMenu
All Implemented Interfaces:
MenuContainer , Serializable , Accessible 
public class PopupMenu
extends Menu

A class that implements a menu which can be dynamically popped up at a specified position within a component.

As the inheritance hierarchy implies, a PopupMenu can be used anywhere a Menu can be used. However, if you use a PopupMenu like a Menu (e.g., you add it to a MenuBar), then you cannot call show on that PopupMenu.

See Also:
Serialized Form

Nested Class Summary
protected  class PopupMenu.AccessibleAWTPopupMenu
          Inner class of PopupMenu used to provide default support for accessibility.
 
Nested classes/interfaces inherited from class java.awt. Menu
Menu.AccessibleAWTMenu
 
Nested classes/interfaces inherited from class java.awt. MenuItem
MenuItem.AccessibleAWTMenuItem
 
Nested classes/interfaces inherited from class java.awt. MenuComponent
MenuComponent.AccessibleAWTMenuComponent
 
Constructor Summary
PopupMenu ()
          Creates a new popup menu with an empty name.
PopupMenu ( String  label)
          Creates a new popup menu with the specified name.
 
Method Summary
 void addNotify ()
          Creates the popup menu's peer.
  AccessibleContext getAccessibleContext ()
          Gets the AccessibleContext associated with this PopupMenu.
  MenuContainer getParent ()
          Returns the parent container for this menu component.
 void show ( Component  origin, int x, int y)
          Shows the popup menu at the x, y position relative to an origin component.
 
Methods inherited from class java.awt. Menu
add , add , addSeparator , countItems , getItem , getItemCount , insert , insert , insertSeparator , isTearOff , paramString , remove , remove , removeAll , removeNotify
 
Methods inherited from class java.awt. MenuItem
addActionListener , deleteShortcut , disable , disableEvents , enable , enable , enableEvents , getActionCommand , getActionListeners , getLabel , getListeners , getShortcut , isEnabled , processActionEvent , processEvent , removeActionListener , setActionCommand , setEnabled , setLabel , setShortcut
 
Methods inherited from class java.awt. MenuComponent
dispatchEvent , getFont , getName , getPeer , getTreeLock , postEvent , setFont , setName , toString
 
Methods inherited from class java.lang. Object
clone , equals , finalize , getClass , hashCode , notify , notifyAll , wait , wait , wait
 
Methods inherited from interface java.awt. MenuContainer
getFont , postEvent
 

Constructor Detail

PopupMenu


public PopupMenu()
          throws HeadlessException
Creates a new popup menu with an empty name.

Throws:
HeadlessException - if GraphicsEnvironment.isHeadless() returns true.
See Also:
GraphicsEnvironment.isHeadless()

PopupMenu


public PopupMenu(String label)
          throws HeadlessException
Creates a new popup menu with the specified name.

Parameters:
label - a non-null string specifying the popup menu's label
Throws:
HeadlessException - if GraphicsEnvironment.isHeadless() returns true.
See Also:
GraphicsEnvironment.isHeadless()
Method Detail

getParent


public MenuContainer getParent()
Returns the parent container for this menu component.

Overrides:
getParent in class MenuComponent
Returns:
the menu component containing this menu component, or null if this menu component is the outermost component, the menu bar itself

addNotify


public void addNotify()
Creates the popup menu's peer. The peer allows us to change the appearance of the popup menu without changing any of the popup menu's functionality.

Overrides:
addNotify in class Menu

show


public void show(Component origin,
                 int x,
                 int y)
Shows the popup menu at the x, y position relative to an origin component. The origin component must be contained within the component hierarchy of the popup menu's parent. Both the origin and the parent must be showing on the screen for this method to be valid.

If this PopupMenu is being used as a Menu (i.e., it has a non-Component parent), then you cannot call this method on the PopupMenu.

Parameters:
origin - the component which defines the coordinate space
x - the x coordinate position to popup the menu
y - the y coordinate position to popup the menu
Throws:
NullPointerException - if the parent is null
IllegalArgumentException - if this PopupMenu has a non-Component parent
IllegalArgumentException - if the origin is not in the parent's heirarchy
RuntimeException - if the parent is not showing on screen

getAccessibleContext


public AccessibleContext getAccessibleContext()
Gets the AccessibleContext associated with this PopupMenu.

Specified by:
getAccessibleContext in interface Accessible
Overrides:
getAccessibleContext in class Menu
Returns:
the AccessibleContext of this PopupMenu
Since:
1.3