Java javax.swing.plaf.basic Class BasicMenuItemUI（JDK8）

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Java™ Platform
Standard Ed. 8

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Summary:
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Field |
Constr |
Method

Detail:
Field |
Constr |
Method

java.lang.Object
- javax.swing.plaf.ComponentUI
- - javax.swing.plaf.ButtonUI
  - - javax.swing.plaf.MenuItemUI
    - - javax.swing.plaf.basic.BasicMenuItemUI

Direct Known Subclasses:

BasicCheckBoxMenuItemUI, BasicMenuUI, BasicRadioButtonMenuItemUI, SynthMenuItemUI
```
public class BasicMenuItemUI
extends MenuItemUI
```
BasicMenuItem implementation

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected class`	`BasicMenuItemUI.MouseInputHandler`

Field Summary

Fields
Modifier and Type	Field and Description
`protected String`	`acceleratorDelimiter` Accelerator delimiter string, such as `'+'` in `'Ctrl+C'`.
`protected Font`	`acceleratorFont`
`protected Color`	`acceleratorForeground`
`protected Color`	`acceleratorSelectionForeground`
`protected Icon`	`arrowIcon`
`protected Icon`	`checkIcon`
`protected int`	`defaultTextIconGap`
`protected Color`	`disabledForeground`
`protected MenuDragMouseListener`	`menuDragMouseListener`
`protected JMenuItem`	`menuItem`
`protected MenuKeyListener`	`menuKeyListener`
`protected MouseInputListener`	`mouseInputListener`
`protected boolean`	`oldBorderPainted`
`protected PropertyChangeListener`	`propertyChangeListener` `PropertyChangeListener` returned from `createPropertyChangeListener`.
`protected Color`	`selectionBackground`
`protected Color`	`selectionForeground`

Constructor Summary

Constructors

Constructor and Description

BasicMenuItemUI()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected MenuDragMouseListener`	`createMenuDragMouseListener(JComponent c)`
`protected MenuKeyListener`	`createMenuKeyListener(JComponent c)`
`protected MouseInputListener`	`createMouseInputListener(JComponent c)`
`protected PropertyChangeListener`	`createPropertyChangeListener(JComponent c)` Creates a `PropertyChangeListener` which will be added to the menu item.
`static ComponentUI`	`createUI(JComponent c)`
`protected void`	`doClick(MenuSelectionManager msm)` Call this method when a menu item is to be activated.
`Dimension`	`getMaximumSize(JComponent c)` Returns the specified component's maximum size appropriate for the look and feel.
`Dimension`	`getMinimumSize(JComponent c)` Returns the specified component's minimum size appropriate for the look and feel.
`MenuElement[]`	`getPath()`
`protected Dimension`	`getPreferredMenuItemSize(JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap)`
`Dimension`	`getPreferredSize(JComponent c)` Returns the specified component's preferred size appropriate for the look and feel.
`protected String`	`getPropertyPrefix()`
`protected void`	`installComponents(JMenuItem menuItem)`
`protected void`	`installDefaults()`
`protected void`	`installKeyboardActions()`
`protected void`	`installListeners()`
`void`	`installUI(JComponent c)` Configures the specified component appropriately for the look and feel.
`void`	`paint(Graphics g, JComponent c)` Paints the specified component appropriately for the look and feel.
`protected void`	`paintBackground(Graphics g, JMenuItem menuItem, Color bgColor)` Draws the background of the menu item.
`protected void`	`paintMenuItem(Graphics g, JComponent c, Icon checkIcon, Icon arrowIcon, Color background, Color foreground, int defaultTextIconGap)`
`protected void`	`paintText(Graphics g, JMenuItem menuItem, Rectangle textRect, String text)` Renders the text of the current menu item.
`protected void`	`uninstallComponents(JMenuItem menuItem)`
`protected void`	`uninstallDefaults()`
`protected void`	`uninstallKeyboardActions()`
`protected void`	`uninstallListeners()`
`void`	`uninstallUI(JComponent c)` Reverses configuration which was done on the specified component during `installUI`.
`void`	`update(Graphics g, JComponent c)` We draw the background in paintMenuItem() so override update (which fills the background of opaque components by default) to just call paint().

Methods inherited from class javax.swing.plaf.ComponentUI
contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior

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

- Field Detail
  - menuItem
```
protected JMenuItem menuItem
```
  - selectionBackground
```
protected Color selectionBackground
```
  - selectionForeground
```
protected Color selectionForeground
```
  - disabledForeground
```
protected Color disabledForeground
```
  - acceleratorForeground
```
protected Color acceleratorForeground
```
  - acceleratorSelectionForeground
```
protected Color acceleratorSelectionForeground
```
  - acceleratorDelimiter
```
protected String acceleratorDelimiter
```
    Accelerator delimiter string, such as '+' in 'Ctrl+C'.
    
    Since:
    
    1.7
  - defaultTextIconGap
```
protected int defaultTextIconGap
```
  - acceleratorFont
```
protected Font acceleratorFont
```
  - mouseInputListener
```
protected MouseInputListener mouseInputListener
```
  - menuDragMouseListener
```
protected MenuDragMouseListener menuDragMouseListener
```
  - menuKeyListener
```
protected MenuKeyListener menuKeyListener
```
  - propertyChangeListener
```
protected PropertyChangeListener propertyChangeListener
```
    PropertyChangeListener returned from createPropertyChangeListener. You should not need to access this field, rather if you want to customize the PropertyChangeListener override createPropertyChangeListener.
    
    Since:
    
    1.6
    
    See Also:
    
    createPropertyChangeListener(javax.swing.JComponent)
  - arrowIcon
```
protected Icon arrowIcon
```
  - checkIcon
```
protected Icon checkIcon
```
  - oldBorderPainted
```
protected boolean oldBorderPainted
```
- Constructor Detail
  - BasicMenuItemUI
```
public BasicMenuItemUI()
```
- Method Detail
  - createUI
```
public static ComponentUI createUI(JComponent c)
```
  - installUI
```
public void installUI(JComponent c)
```
    Description copied from class: ComponentUI
    Configures the specified component appropriately for the look and feel. This method is invoked when the ComponentUI instance is being installed as the UI delegate on the specified component. This method should completely configure the component for the look and feel, including the following:
    1. Install default property values for color, fonts, borders, icons, opacity, etc. on the component. Whenever possible, property values initialized by the client program should not be overridden.
    2. Install a LayoutManager on the component if necessary.
    3. Create/add any required sub-components to the component.
    4. Create/install event listeners on the component.
    5. Create/install a PropertyChangeListener on the component in order to detect and respond to component property changes appropriately.
    6. Install keyboard UI (mnemonics, traversal, etc.) on the component.
    7. Initialize any appropriate instance data.
    Overrides:
    
    installUI in class ComponentUI
    
    Parameters:
    
    c - the component where this UI delegate is being installed
    
    See Also:
    
    ComponentUI.uninstallUI(javax.swing.JComponent), JComponent.setUI(javax.swing.plaf.ComponentUI), JComponent.updateUI()
  - installDefaults
```
protected void installDefaults()
```
  - installComponents
```
protected void installComponents(JMenuItem menuItem)
```
    Since:
    
    1.3
  - getPropertyPrefix
```
protected String getPropertyPrefix()
```
  - installListeners
```
protected void installListeners()
```
  - installKeyboardActions
```
protected void installKeyboardActions()
```
  - uninstallUI
```
public void uninstallUI(JComponent c)
```
    Description copied from class: ComponentUI
    Reverses configuration which was done on the specified component during installUI. This method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component. This method should undo the configuration performed in installUI, being careful to leave the JComponent instance in a clean state (no extraneous listeners, look-and-feel-specific property objects, etc.). This should include the following:
    1. Remove any UI-set borders from the component.
    2. Remove any UI-set layout managers on the component.
    3. Remove any UI-added sub-components from the component.
    4. Remove any UI-added event/property listeners from the component.
    5. Remove any UI-installed keyboard UI from the component.
    6. Nullify any allocated instance data objects to allow for GC.
    Overrides:
    
    uninstallUI in class ComponentUI
    
    Parameters:
    
    c - the component from which this UI delegate is being removed; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
    
    See Also:
    
    ComponentUI.installUI(javax.swing.JComponent), JComponent.updateUI()
  - uninstallDefaults
```
protected void uninstallDefaults()
```
  - uninstallComponents
```
protected void uninstallComponents(JMenuItem menuItem)
```
    Since:
    
    1.3
  - uninstallListeners
```
protected void uninstallListeners()
```
  - uninstallKeyboardActions
```
protected void uninstallKeyboardActions()
```
  - createMouseInputListener
```
protected MouseInputListener createMouseInputListener(JComponent c)
```
  - createMenuDragMouseListener
```
protected MenuDragMouseListener createMenuDragMouseListener(JComponent c)
```
  - createMenuKeyListener
```
protected MenuKeyListener createMenuKeyListener(JComponent c)
```
  - createPropertyChangeListener
```
protected PropertyChangeListener createPropertyChangeListener(JComponent c)
```
    Creates a PropertyChangeListener which will be added to the menu item. If this method returns null then it will not be added to the menu item.
    
    Returns:
    
    an instance of a PropertyChangeListener or null
    
    Since:
    
    1.6
  - getMinimumSize
```
public Dimension getMinimumSize(JComponent c)
```
    Description copied from class: ComponentUI
    
    Returns the specified component's minimum size appropriate for the look and feel. If null is returned, the minimum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.
    
    Overrides:
    
    getMinimumSize in class ComponentUI
    
    Parameters:
    
    c - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
    
    Returns:
    
    a Dimension object or null
    
    See Also:
    
    JComponent.getMinimumSize(), LayoutManager.minimumLayoutSize(java.awt.Container), ComponentUI.getPreferredSize(javax.swing.JComponent)
  - getPreferredSize
```
public Dimension getPreferredSize(JComponent c)
```
    Description copied from class: ComponentUI
    
    Returns the specified component's preferred size appropriate for the look and feel. If null is returned, the preferred size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method returns null.
    
    Overrides:
    
    getPreferredSize in class ComponentUI
    
    Parameters:
    
    c - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
    
    See Also:
    
    JComponent.getPreferredSize(), LayoutManager.preferredLayoutSize(java.awt.Container)
  - getMaximumSize
```
public Dimension getMaximumSize(JComponent c)
```
    Description copied from class: ComponentUI
    
    Returns the specified component's maximum size appropriate for the look and feel. If null is returned, the maximum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.
    
    Overrides:
    
    getMaximumSize in class ComponentUI
    
    Parameters:
    
    c - the component whose maximum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
    
    Returns:
    
    a Dimension object or null
    
    See Also:
    
    JComponent.getMaximumSize(), LayoutManager2.maximumLayoutSize(java.awt.Container)
  - getPreferredMenuItemSize
```
protected Dimension getPreferredMenuItemSize(JComponent c,
                                             Icon checkIcon,
                                             Icon arrowIcon,
                                             int defaultTextIconGap)
```
  - update
```
public void update(Graphics g,
                   JComponent c)
```
    We draw the background in paintMenuItem() so override update (which fills the background of opaque components by default) to just call paint().
    
    Overrides:
    
    update in class ComponentUI
    
    Parameters:
    
    g - the Graphics context in which to paint
    
    c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
    
    See Also:
    
    ComponentUI.paint(java.awt.Graphics, javax.swing.JComponent), JComponent.paintComponent(java.awt.Graphics)
  - paint
```
public void paint(Graphics g,
                  JComponent c)
```
    Description copied from class: ComponentUI
    
    Paints the specified component appropriately for the look and feel. This method is invoked from the ComponentUI.update method when the specified component is being painted. Subclasses should override this method and use the specified Graphics object to render the content of the component.
    
    Overrides:
    
    paint in class ComponentUI
    
    Parameters:
    
    g - the Graphics context in which to paint
    
    c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
    
    See Also:
    
    ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)
  - paintMenuItem
```
protected void paintMenuItem(Graphics g,
                             JComponent c,
                             Icon checkIcon,
                             Icon arrowIcon,
                             Color background,
                             Color foreground,
                             int defaultTextIconGap)
```
  - paintBackground
```
protected void paintBackground(Graphics g,
                               JMenuItem menuItem,
                               Color bgColor)
```
    Draws the background of the menu item.
    
    Parameters:
    
    g - the paint graphics
    
    menuItem - menu item to be painted
    
    bgColor - selection background color
    
    Since:
    
    1.4
  - paintText
```
protected void paintText(Graphics g,
                         JMenuItem menuItem,
                         Rectangle textRect,
                         String text)
```
    Renders the text of the current menu item.
    
    Parameters:
    
    g - graphics context
    
    menuItem - menu item to render
    
    textRect - bounding rectangle for rendering the text
    
    text - string to render
    
    Since:
    
    1.4
  - getPath
```
public MenuElement[] getPath()
```
  - doClick
```
protected void doClick(MenuSelectionManager msm)
```
    Call this method when a menu item is to be activated. This method handles some of the details of menu item activation such as clearing the selected path and messaging the JMenuItem's doClick() method.
    
    Parameters:
    
    msm - A MenuSelectionManager. The visual feedback and internal bookkeeping tasks are delegated to this MenuSelectionManager. If null is passed as this argument, the MenuSelectionManager.defaultManager is used.
    
    Since:
    
    1.4
    
    See Also:
    
    MenuSelectionManager, AbstractButton.doClick(int)

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Java™ Platform
Standard Ed. 8

All Classes

Summary:
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Field |
Constr |
Method

Detail:
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Java javax.swing.plaf.basic Class BasicMenuItemUI（JDK8）

Class BasicMenuItemUI

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class javax.swing.plaf.ComponentUI

Methods inherited from class java.lang.Object

Field Detail

menuItem

selectionBackground

selectionForeground

disabledForeground

acceleratorForeground

acceleratorSelectionForeground

acceleratorDelimiter

defaultTextIconGap

acceleratorFont

mouseInputListener

menuDragMouseListener

menuKeyListener

propertyChangeListener

arrowIcon

checkIcon

oldBorderPainted

Constructor Detail

BasicMenuItemUI

Method Detail

createUI

installUI

installDefaults

installComponents

getPropertyPrefix

installListeners

installKeyboardActions

uninstallUI

uninstallDefaults

uninstallComponents

uninstallListeners

uninstallKeyboardActions

createMouseInputListener

createMenuDragMouseListener

createMenuKeyListener

createPropertyChangeListener

getMinimumSize

getPreferredSize

getMaximumSize

getPreferredMenuItemSize

update

paint

paintMenuItem

paintBackground

paintText

getPath

doClick