Class PopupMenu

java.lang.Object

java.awt.MenuComponent

java.awt.MenuItem

java.awt.Menu

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

Nested Classes

Modifier and Type	Class	Description
protected class	PopupMenu.AccessibleAWTPopupMenu	Inner class of PopupMenu used to provide default support for accessibility.

Nested classes/interfaces inherited from class Menu

Menu.AccessibleAWTMenu

Nested classes/interfaces inherited from class MenuItem

MenuItem.AccessibleAWTMenuItem

Nested classes/interfaces inherited from class MenuComponent

MenuComponent.AccessibleAWTMenuComponent

Constructor Summary

Constructors

Constructor	Description
PopupMenu()	Creates a new popup menu with an empty name.
PopupMenu(String label)	Creates a new popup menu with the specified name.

Method Summary

Modifier and Type	Method	Description
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 Menu

add, add, addSeparator, countItems, getItem, getItemCount, insert, insert, insertSeparator, isTearOff, paramString, remove, remove, removeAll, removeNotify

Methods inherited from class 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 MenuComponent

dispatchEvent, getFont, getName, getTreeLock, postEvent, setFont, setName, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface MenuContainer

getFont, postEvent

Constructor Details

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 Details

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 hierarchy

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