BasicMenuItemUI (Java 2 Platform SE v1.4.1_"07")

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JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

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## javax.swing.plaf.basic
Class BasicMenuItemUI

    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

public class BasicMenuItemUI
extends MenuItemUI

BasicMenuItem implementation

Nested Class Summary
`protected class` | `BasicMenuItemUI.MouseInputHandler`

Field Summary
`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 Color` | `selectionBackground`
`protected Color` | `selectionForeground`

Constructor Summary
`BasicMenuItemUI()`

Method Summary
`protected MenuDragMouseListener` | `createMenuDragMouseListener(JComponent c)`
`protected MenuKeyListener` | `createMenuKeyListener(JComponent c)`
`protected MouseInputListener` | `createMouseInputListener(JComponent c)`
`static ComponentUI` | `createUI(JComponent c)` Returns an instance of the UI delegate for the specified component.
`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 appropriate for the look and feel.
`void` | `paint(Graphics g, JComponent c)` Paints the specified component appropriate 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`

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

### defaultTextIconGap

    protected int defaultTextIconGap

### acceleratorFont

    protected Font acceleratorFont

### mouseInputListener

    protected MouseInputListener mouseInputListener

### menuDragMouseListener

    protected MenuDragMouseListener menuDragMouseListener

### menuKeyListener

    protected MenuKeyListener menuKeyListener

### 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)

  Description copied from class: `ComponentUI`
  Returns an instance of the UI delegate for the specified component. Each subclass must provide its own static `createUI` method that returns an instance of that UI delegate subclass. If the UI delegate subclass is stateless, it may return an instance that is shared by multiple components. If the UI delegate is stateful, then it should return a new instance per component. The default implementation of this method throws an error, as it should never be invoked.

### installUI

    public void installUI(JComponent c)

  Description copied from class: `ComponentUI`
  Configures the specified component appropriate 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 any 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)

### 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 appropriate 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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JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

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