W3cubDocs

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 JavaBeans has been added to the java.beans package. Please see XMLEncoder.

See Also:

Nested Class Summary

Modifier and Type	Class	Description
`class`	`MetalComboBoxUI.MetalComboBoxLayoutManager`	This class should be treated as a "protected" inner class.
`class`	`MetalComboBoxUI.MetalComboPopup`	Deprecated. As of Java 2 platform v1.4.
`class`	`MetalComboBoxUI.MetalPropertyChangeListener`	This class should be treated as a "protected" inner class.

Nested classes/interfaces declared in class javax.swing.plaf.basic.BasicComboBoxUI

BasicComboBoxUI.ComboBoxLayoutManager, BasicComboBoxUI.FocusHandler, BasicComboBoxUI.ItemHandler, BasicComboBoxUI.KeyHandler, BasicComboBoxUI.ListDataHandler, BasicComboBoxUI.PropertyChangeHandler

Field Summary

Fields declared in class javax.swing.plaf.basic.BasicComboBoxUI

arrowButton, cachedMinimumSize, comboBox, currentValuePane, editor, focusListener, hasFocus, isMinimumSizeDirty, itemListener, keyListener, listBox, listDataListener, padding, popup, popupKeyListener, popupMouseListener, popupMouseMotionListener, propertyChangeListener, squareButton

Constructor Summary

Constructor	Description
`MetalComboBoxUI()`	Constructs a `MetalComboBoxUI`.

Method Summary

Modifier and Type	Method	Description
`void`	`configureEditor()`	This protected method is implementation specific and should be private.
`PropertyChangeListener`	`createPropertyChangeListener()`	Creates a `PropertyChangeListener` which will be added to the combo box.
`static ComponentUI`	`createUI(JComponent c)`	Constructs an instance of `MetalComboBoxUI`.
`protected void`	`editablePropertyChanged(PropertyChangeEvent e)`	Deprecated. As of Java 2 platform v1.4.
`int`	`getBaseline(JComponent c, int width, int height)`	Returns the baseline.
`void`	`layoutComboBox(Container parent, MetalComboBoxUI.MetalComboBoxLayoutManager manager)`	Lays out the `JComboBox` in the `parent` container.
`void`	`paintCurrentValue(Graphics g, Rectangle bounds, boolean hasFocus)`	If necessary paints the currently selected item.
`void`	`paintCurrentValueBackground(Graphics g, Rectangle bounds, boolean hasFocus)`	If necessary paints the background of the currently selected item.
`protected void`	`removeListeners()`	Deprecated. As of Java 2 platform v1.4.
`void`	`unconfigureEditor()`	This protected method is implementation specific and should be private.

Methods declared in class javax.swing.plaf.basic.BasicComboBoxUI

addEditor, configureArrowButton, createArrowButton, createEditor, createFocusListener, createItemListener, createKeyListener, createLayoutManager, createListDataListener, createPopup, createRenderer, getBaselineResizeBehavior, getDefaultSize, getDisplaySize, getInsets, getMinimumSize, getSizeForComponent, installComponents, installDefaults, installKeyboardActions, installListeners, isFocusTraversable, isNavigationKey, isPopupVisible, rectangleForCurrentValue, removeEditor, selectNextPossibleValue, selectPreviousPossibleValue, setPopupVisible, toggleOpenClose, unconfigureArrowButton, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners

Methods declared in class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getMaximumSize, getPreferredSize, installUI, paint, uninstallUI, update

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MetalComboBoxUI

public MetalComboBoxUI()

Constructs a MetalComboBoxUI.

Method Details

createUI

public static ComponentUI createUI(JComponent c)

Constructs an instance of MetalComboBoxUI.

Parameters:: c - a component
Returns:: an instance of MetalComboBoxUI

paintCurrentValue

public void paintCurrentValue(Graphics g, Rectangle bounds, boolean hasFocus)

If necessary paints the currently selected item.

Overrides:: paintCurrentValue in class BasicComboBoxUI
Parameters:: g - Graphics to paint to; bounds - Region to paint current value to; hasFocus - whether or not the JComboBox has focus
Throws:: NullPointerException - if any of the arguments are null.
Since:: 1.5

paintCurrentValueBackground

public void paintCurrentValueBackground(Graphics g, Rectangle bounds, boolean hasFocus)

If necessary paints the background of the currently selected item.

Overrides:: paintCurrentValueBackground in class BasicComboBoxUI
Parameters:: g - Graphics to paint to; bounds - Region to paint background to; hasFocus - whether or not the JComboBox has focus
Throws:: NullPointerException - if any of the arguments are null.
Since:: 1.5

getBaseline

public int getBaseline(JComponent c, int width, int height)

Returns the baseline.

Overrides:

getBaseline in class BasicComboBoxUI

Parameters:

c - JComponent baseline is being requested for

width - the width to get the baseline for

height - the height to get the baseline for

Returns:

baseline or a value < 0 indicating there is no reasonable baseline

Throws:

NullPointerException - if c is null

IllegalArgumentException - if width or height is < 0

Since:

1.6

See Also:

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

@Deprecated 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.

Parameters:: e - an instance of PropertyChangeEvent

layoutComboBox

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

Lays out the JComboBox in the parent container.

Parameters:: parent - a container; manager - an instance of MetalComboBoxLayoutManager

removeListeners

@Deprecated 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:

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:

© 1993, 2023, 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/21/docs/api/java.desktop/javax/swing/plaf/metal/MetalComboBoxUI.html