Interface MenuElement
- All Known Implementing Classes:
-
BasicComboPopup,BasicInternalFrameTitlePane.SystemMenuBar,JCheckBoxMenuItem,JMenu,JMenuBar,JMenuItem,JPopupMenu,JRadioButtonMenuItem,MetalComboBoxUI.MetalComboPopup
public interface MenuElement
Any component that can be placed into a menu should implement this interface. This interface is used by MenuSelectionManager to handle selection and navigation in menu hierarchies.
- Since:
- 1.2
Methods
| Modifier and Type | Method | Description |
|---|---|---|
Component | getComponent() | This method should return the |
MenuElement[] | getSubElements() | This method should return an array containing the sub-elements for the receiving menu element. |
void | menuSelectionChanged(boolean isIncluded) | Call by the |
void | processKeyEvent(KeyEvent event,
MenuElement[] path,
MenuSelectionManager manager) | Process a key event. |
void | processMouseEvent(MouseEvent event,
MenuElement[] path,
MenuSelectionManager manager) | Processes a mouse event. |
Methods
processMouseEvent
void processMouseEvent(MouseEvent event,
MenuElement[] path,
MenuSelectionManager manager) Processes a mouse event. event is a MouseEvent with source being the receiving element's component. path is the path of the receiving element in the menu hierarchy including the receiving element itself. manager is the MenuSelectionManagerfor the menu hierarchy. This method should process the MouseEvent and change the menu selection if necessary by using MenuSelectionManager's API Note: you do not have to forward the event to sub-components. This is done automatically by the MenuSelectionManager.
- Parameters:
-
event- aMouseEventto be processed -
path- the path of the receiving element in the menu hierarchy -
manager- theMenuSelectionManagerfor the menu hierarchy
processKeyEvent
void processKeyEvent(KeyEvent event,
MenuElement[] path,
MenuSelectionManager manager) Process a key event.
- Parameters:
-
event- aKeyEventto be processed -
path- the path of the receiving element in the menu hierarchy -
manager- theMenuSelectionManagerfor the menu hierarchy
menuSelectionChanged
void menuSelectionChanged(boolean isIncluded)
Call by the MenuSelectionManager when the MenuElement is added or removed from the menu selection.
- Parameters:
-
isIncluded- can be used to indicate if thisMenuElementis active (if it is a menu) or is on the part of the menu path that changed (if it is a menu item).
getSubElements
MenuElement[] getSubElements()
This method should return an array containing the sub-elements for the receiving menu element.
- Returns:
- an array of
MenuElements
getComponent
Component getComponent()
This method should return the java.awt.Component used to paint the receiving element. The returned component will be used to convert events and detect if an event is inside a MenuElement's component.
- Returns:
- the
Componentvalue
© 1993, 2020, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/MenuElement.html