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## javax.swing.plaf.metal
Class MetalComboBoxUI

    java.lang.Object
      javax.swing.plaf.ComponentUI
          javax.swing.plaf.ComboBoxUI
              javax.swing.plaf.basic.BasicComboBoxUI
                  javax.swing.plaf.metal.MetalComboBoxUI

public class MetalComboBoxUI
extends BasicComboBoxUI

Metal UI for JComboBox

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the `java.beans` package. Please see `XMLEncoder`.

See Also:
  `MetalComboBoxEditor`, `MetalComboBoxButton`

Nested Class Summary
`class` | `MetalComboBoxUI.MetalComboBoxLayoutManager` This inner class is marked "public" due to a compiler bug.
`class` | `MetalComboBoxUI.MetalComboPopup` Deprecated. As of Java 2 platform v1.4.
`class` | `MetalComboBoxUI.MetalPropertyChangeListener` This inner class is marked "public" due to a compiler bug.

Nested classes inherited from class javax.swing.plaf.basic.BasicComboBoxUI
`BasicComboBoxUI.ComboBoxLayoutManager, BasicComboBoxUI.FocusHandler, BasicComboBoxUI.ItemHandler, BasicComboBoxUI.KeyHandler, BasicComboBoxUI.ListDataHandler, BasicComboBoxUI.PropertyChangeHandler`

Field Summary

Fields inherited from class javax.swing.plaf.basic.BasicComboBoxUI
`arrowButton, cachedMinimumSize, comboBox, currentValuePane, editor, focusListener, hasFocus, isMinimumSizeDirty, itemListener, keyListener, listBox, listDataListener, popup, popupKeyListener, popupMouseListener, popupMouseMotionListener, propertyChangeListener`

Constructor Summary
`MetalComboBoxUI()`

Method Summary
`void` | `configureEditor()` This protected method is implementation specific and should be private.
`protected JButton` | `createArrowButton()` Creates an button which will be used as the control to show or hide the popup portion of the combo box.
`protected ComboBoxEditor` | `createEditor()` Creates the default editor that will be used in editable combo boxes.
`protected LayoutManager` | `createLayoutManager()` Creates a layout manager for managing the components which make up the combo box.
`protected ComboPopup` | `createPopup()` Creates the popup portion of the combo box.
`PropertyChangeListener` | `createPropertyChangeListener()` Creates a `PropertyChangeListener` which will be added to the combo box.
`static ComponentUI` | `createUI(JComponent c)` Returns an instance of the UI delegate for the specified component.
`protected void` | `editablePropertyChanged(PropertyChangeEvent e)` Deprecated. As of Java 2 platform v1.4.
`Dimension` | `getMinimumSize(JComponent c)` The minumum size is the size of the display area plus insets plus the button.
`void` | `layoutComboBox(Container parent, MetalComboBoxUI.MetalComboBoxLayoutManager manager)`
`void` | `paint(Graphics g, JComponent c)` Paints the specified component appropriate for the look and feel.
`protected void` | `removeListeners()` Deprecated. As of Java 2 platform v1.4.
`void` | `unconfigureEditor()` This protected method is implementation specific and should be private.

Methods inherited from class javax.swing.plaf.basic.BasicComboBoxUI
`addEditor, configureArrowButton, createFocusListener, createItemListener, createKeyListener, createListDataListener, createRenderer, getAccessibleChild, getAccessibleChildrenCount, getDefaultSize, getDisplaySize, getInsets, getMaximumSize, getPreferredSize, installComponents, installDefaults, installKeyboardActions, installListeners, installUI, isFocusTraversable, isNavigationKey, isPopupVisible, paintCurrentValue, paintCurrentValueBackground, rectangleForCurrentValue, removeEditor, selectNextPossibleValue, selectPreviousPossibleValue, setPopupVisible, toggleOpenClose, unconfigureArrowButton, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners, uninstallUI`

Methods inherited from class javax.swing.plaf.ComponentUI
`contains, update`

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

Constructor Detail

### MetalComboBoxUI

    public MetalComboBoxUI()

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.

### 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 `BasicComboBoxUI`

### createEditor

    protected ComboBoxEditor createEditor()

  Description copied from class: `BasicComboBoxUI`
  Creates the default editor that will be used in editable combo boxes. A default editor will be used only if an editor has not been explicitly set with `setEditor`.

  Overrides:
    `createEditor` in class `BasicComboBoxUI`
  Returns:
    a `ComboBoxEditor` used for the combo box
  See Also:
    `JComboBox.setEditor(javax.swing.ComboBoxEditor)`

### createPopup

    protected ComboPopup createPopup()

  Description copied from class: `BasicComboBoxUI`
  Creates the popup portion of the combo box.

  Overrides:
    `createPopup` in class `BasicComboBoxUI`
  Returns:
    an instance of `ComboPopup`
  See Also:
    `ComboPopup`

### createArrowButton

    protected JButton createArrowButton()

  Description copied from class: `BasicComboBoxUI`
  Creates an button which will be used as the control to show or hide the popup portion of the combo box.

  Overrides:
    `createArrowButton` in class `BasicComboBoxUI`
  Returns:
    a button which represents the popup control

### createPropertyChangeListener

    public PropertyChangeListener createPropertyChangeListener()

  Description copied from class: `BasicComboBoxUI`
  Creates a `PropertyChangeListener` which will be added to the combo box. If this method returns null then it will not be added to the combo box.

  Overrides:
    `createPropertyChangeListener` in class `BasicComboBoxUI`
  Returns:
    an instance of a `PropertyChangeListener` or null

### editablePropertyChanged

    protected void editablePropertyChanged(PropertyChangeEvent e)

  Deprecated. As of Java 2 platform v1.4.

  As of Java 2 platform v1.4 this method is no longer used. Do not call or override. All the functionality of this method is in the MetalPropertyChangeListener.

### createLayoutManager

    protected LayoutManager createLayoutManager()

  Description copied from class: `BasicComboBoxUI`
  Creates a layout manager for managing the components which make up the combo box.

  Overrides:
    `createLayoutManager` in class `BasicComboBoxUI`
  Returns:
    an instance of a layout manager

### layoutComboBox

    public void layoutComboBox(Container parent,
                               MetalComboBoxUI.MetalComboBoxLayoutManager manager)

### removeListeners

    protected void removeListeners()

  Deprecated. As of Java 2 platform v1.4.

  As of Java 2 platform v1.4 this method is no longer used.

### configureEditor

    public void configureEditor()

  Description copied from class: `BasicComboBoxUI`
  This protected method is implementation specific and should be private. do not call or override.

  Overrides:
    `configureEditor` in class `BasicComboBoxUI`
  See Also:
    `BasicComboBoxUI.addEditor()`

### unconfigureEditor

    public void unconfigureEditor()

  Description copied from class: `BasicComboBoxUI`
  This protected method is implementation specific and should be private. Do not call or override.

  Overrides:
    `unconfigureEditor` in class `BasicComboBoxUI`
  See Also:
    `BasicComboBoxUI.addEditor()`

### getMinimumSize

    public Dimension getMinimumSize(JComponent c)

  Description copied from class: `BasicComboBoxUI`
  The minumum size is the size of the display area plus insets plus the button.

  Overrides:
    `getMinimumSize` in class `BasicComboBoxUI`

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