- java.lang.Object
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- java.awt.MenuComponent
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- java.awt.MenuItem
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- java.awt.Menu
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- java.awt.PopupMenu
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- 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
PopupMenucan be used anywhere aMenucan be used. However, if you use aPopupMenulike aMenu(e.g., you add it to aMenuBar), then you cannot callshowon thatPopupMenu.- See Also:
- Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description protected classPopupMenu.AccessibleAWTPopupMenuInner class of PopupMenu used to provide default support for accessibility.-
Nested classes/interfaces declared in class java.awt.Menu
Menu.AccessibleAWTMenu
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Nested classes/interfaces declared in class java.awt.MenuItem
MenuItem.AccessibleAWTMenuItem
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Nested classes/interfaces declared in class java.awt.MenuComponent
MenuComponent.AccessibleAWTMenuComponent
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidaddNotify()Creates the popup menu's peer.AccessibleContextgetAccessibleContext()Gets theAccessibleContextassociated with thisPopupMenu.voidshow(Component origin, int x, int y)Shows the popup menu at the x, y position relative to an origin component.-
Methods declared in class java.awt.Menu
add, add, addSeparator, countItems, getItem, getItemCount, insert, insert, insertSeparator, isTearOff, paramString, remove, remove, removeAll, removeNotify
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Methods declared in class java.awt.MenuItem
addActionListener, deleteShortcut, disable, disableEvents, enable, enable, enableEvents, getActionCommand, getActionListeners, getLabel, getListeners, getShortcut, isEnabled, processActionEvent, processEvent, removeActionListener, setActionCommand, setEnabled, setLabel, setShortcut
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Methods declared in class java.awt.MenuComponent
dispatchEvent, getFont, getName, getParent, getTreeLock, postEvent, setFont, setName, toString
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Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods declared in interface java.awt.MenuContainer
getFont, postEvent
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Constructor Detail
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PopupMenu
public PopupMenu() throws HeadlessExceptionCreates a new popup menu with an empty name.- Throws:
HeadlessException- if GraphicsEnvironment.isHeadless() returns true.- See Also:
GraphicsEnvironment.isHeadless()
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PopupMenu
public PopupMenu(String label) throws HeadlessException
Creates a new popup menu with the specified name.- Parameters:
label- a non-nullstring specifying the popup menu's label- Throws:
HeadlessException- if GraphicsEnvironment.isHeadless() returns true.- See Also:
GraphicsEnvironment.isHeadless()
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Method Detail
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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.
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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
PopupMenuis being used as aMenu(i.e., it has a non-Componentparent), then you cannot call this method on thePopupMenu.- Parameters:
origin- the component which defines the coordinate spacex- the x coordinate position to popup the menuy- the y coordinate position to popup the menu- Throws:
NullPointerException- if the parent isnullIllegalArgumentException- if thisPopupMenuhas a non-ComponentparentIllegalArgumentException- if the origin is not in the parent's hierarchyRuntimeException- if the parent is not showing on screen
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getAccessibleContext
public AccessibleContext getAccessibleContext()
Gets theAccessibleContextassociated with thisPopupMenu.- Specified by:
getAccessibleContextin interfaceAccessible- Overrides:
getAccessibleContextin classMenu- Returns:
- the
AccessibleContextof thisPopupMenu - Since:
- 1.3
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