javax.swing.plaf.basic

Class BasicMenuBarUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.MenuBarUI

javax.swing.plaf.basic.BasicMenuBarUI

Direct Known Subclasses:

MetalMenuBarUI, SynthMenuBarUI

public class BasicMenuBarUI
extends MenuBarUI

A default L&F implementation of MenuBarUI. This implementation is a "combined" view/controller.

Field Summary

Fields

Modifier and Type	Field and Description
protected ChangeListener	changeListener The instance of ChangeListener.
protected ContainerListener	containerListener The instance of ContainerListener.
protected JMenuBar	menuBar The instance of JMenuBar.

Constructor Summary

Constructors

Constructor and Description
BasicMenuBarUI()

Method Summary

Modifier and Type	Method and Description
protected ChangeListener	createChangeListener() Returns an instance of ChangeListener.
protected ContainerListener	createContainerListener() Returns an instance of ContainerListener.
static ComponentUI	createUI(JComponent x) Returns a new instance of BasicMenuBarUI.
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.
protected void	installDefaults() Installs default properties.
protected void	installKeyboardActions() Registers keyboard actions.
protected void	installListeners() Registers listeners.
void	installUI(JComponent c) Configures the specified component appropriately for the look and feel.
protected void	uninstallDefaults() Uninstalls default properties.
protected void	uninstallKeyboardActions() Unregisters keyboard actions.
protected void	uninstallListeners() Unregisters listeners.
void	uninstallUI(JComponent c) Reverses configuration which was done on the specified component during installUI.

Methods inherited from class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getPreferredSize, paint, update

Methods inherited from class java.lang.Object

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

Field Detail

menuBar

protected JMenuBar menuBar

The instance of JMenuBar.

containerListener

protected ContainerListener containerListener

The instance of ContainerListener.

changeListener

protected ChangeListener changeListener

The instance of ChangeListener.

Constructor Detail

BasicMenuBarUI

public BasicMenuBarUI()

Method Detail

createUI

public static ComponentUI createUI(JComponent x)

Returns a new instance of BasicMenuBarUI.

Parameters:

x - a component

Returns:

a new instance of BasicMenuBarUI

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()

Installs default properties.

installListeners

protected void installListeners()

Registers listeners.

installKeyboardActions

protected void installKeyboardActions()

Registers keyboard actions.

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()

Uninstalls default properties.

uninstallListeners

protected void uninstallListeners()

Unregisters listeners.

uninstallKeyboardActions

protected void uninstallKeyboardActions()

Unregisters keyboard actions.

createContainerListener

protected ContainerListener createContainerListener()

Returns an instance of ContainerListener.

Returns:

an instance of ContainerListener

createChangeListener

protected ChangeListener createChangeListener()

Returns an instance of ChangeListener.

Returns:

an instance of ChangeListener

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)

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)