MenuBar (Datasystems API)

java.lang.Object
- java.awt.Component
- - java.awt.Container
  - - javax.swing.JComponent
    - - javax.swing.JMenuBar
      - org.openide.awt.MenuBar

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable
```
public class MenuBar
extends javax.swing.JMenuBar
implements java.io.Externalizable
```
An extended version of swing's JMenuBar. This menubar can load its content from the folder where its "disk image" is stored.
Moreover, menu is Externalizable to restore its persistent state with minimal storage expensiveness. The MenuBar recognizes following objects in the folder:
- subfolders - they're turned into top-level JMenu instances
- instances of Component - they're added directly to the menubar.
- instances of Presenter.Toolbar - their toolbar presenter is added to the menubar.
before OpenAPI version 3.2, only subfolders were recognized.
In subfolders the following objects are recognized and added to submenus:
- nested subfolders - they're turned into submenus
- instances of Presenter.Menu
- instances of JMenuItem
- instances of JSeparator
- instances of Action
- executable DataObjects
See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class java.awt.Component
  java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy
- Nested classes/interfaces inherited from class java.awt.Container
  java.awt.Container.AccessibleAWTContainer
- Nested classes/interfaces inherited from class javax.swing.JComponent
  javax.swing.JComponent.AccessibleJComponent
- Nested classes/interfaces inherited from class javax.swing.JMenuBar
  javax.swing.JMenuBar.AccessibleJMenuBar

Field Summary
- Fields inherited from class java.awt.Component
  accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
- Fields inherited from interface java.awt.image.ImageObserver
  ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
- Fields inherited from class javax.swing.JComponent
  listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Constructor Summary

Constructors
Constructor	Description
`MenuBar()`	Don't call this constructor or this class will not get initialized properly.
`MenuBar(DataFolder folder)`	Creates a new `MenuBar` from given folder.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addImpl(java.awt.Component c, java.lang.Object constraint, int idx)`
`int`	`getMenuCount()`
`boolean`	`isOpaque()`
`void`	`readExternal(java.io.ObjectInput in)`	Restores contents of this object from the specified stream.
`void`	`updateUI()`
`void`	`waitFinished()`	Blocks until the menubar is completely created.
`void`	`writeExternal(java.io.ObjectOutput out)`	Saves the contents of this object to the specified stream.

Methods inherited from class java.awt.Component
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

Methods inherited from class javax.swing.JComponent
addAncestorListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class javax.swing.JMenuBar
add, addNotify, getAccessibleContext, getComponent, getComponentAtIndex, getComponentIndex, getHelpMenu, getMargin, getMenu, getSelectionModel, getSubElements, getUI, getUIClassID, isBorderPainted, isSelected, menuSelectionChanged, paintBorder, paramString, processKeyBinding, processKeyEvent, processMouseEvent, removeNotify, setBorderPainted, setHelpMenu, setMargin, setSelected, setSelectionModel, setUI

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - MenuBar
```
public MenuBar()
```
    Don't call this constructor or this class will not get initialized properly. This constructor is only for externalization.
  - MenuBar
```
public MenuBar(DataFolder folder)
```
    Creates a new MenuBar from given folder.
    
    Parameters:
    
    folder - The folder from which to create the content of the menubar. If the parameter is null, default menu folder is obtained.
- Method Detail
  - isOpaque
```
public boolean isOpaque()
```
    Overrides:
    
    isOpaque in class javax.swing.JComponent
  - updateUI
```
public void updateUI()
```
    Overrides:
    
    updateUI in class javax.swing.JMenuBar
  - getMenuCount
```
public int getMenuCount()
```
    Overrides:
    
    getMenuCount in class javax.swing.JMenuBar
  - addImpl
```
public void addImpl(java.awt.Component c,
                    java.lang.Object constraint,
                    int idx)
```
    Overrides:
    
    addImpl in class java.awt.Container
  - waitFinished
```
public void waitFinished()
```
    Blocks until the menubar is completely created.
  - writeExternal
```
public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException
```
    Saves the contents of this object to the specified stream.
    
    Specified by:
    
    writeExternal in interface java.io.Externalizable
    
    Throws:
    
    java.io.IOException - Includes any I/O exceptions that may occur
  - readExternal
```
public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException
```
    Restores contents of this object from the specified stream.
    
    Specified by:
    
    readExternal in interface java.io.Externalizable
    
    Throws:
    
    java.lang.ClassNotFoundException - If the class for an object being restored cannot be found.
    
    java.io.IOException

Class MenuBar

Nested Class Summary

Nested classes/interfaces inherited from class java.awt.Component

Nested classes/interfaces inherited from class java.awt.Container

Nested classes/interfaces inherited from class javax.swing.JComponent

Nested classes/interfaces inherited from class javax.swing.JMenuBar

Field Summary

Fields inherited from class java.awt.Component

Fields inherited from interface java.awt.image.ImageObserver

Fields inherited from class javax.swing.JComponent

Constructor Summary

Method Summary

Methods inherited from class java.awt.Component

Methods inherited from class java.awt.Container

Methods inherited from class javax.swing.JComponent

Methods inherited from class javax.swing.JMenuBar

Methods inherited from class java.lang.Object

Constructor Detail

MenuBar

MenuBar

Method Detail

isOpaque

updateUI

getMenuCount

addImpl

waitFinished

writeExternal

readExternal