Module java.desktop

Package javax.swing.plaf.basic

Class BasicPopupMenuUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.PopupMenuUI

javax.swing.plaf.basic.BasicPopupMenuUI

Direct Known Subclasses:

SynthPopupMenuUI

public class BasicPopupMenuUI
extends PopupMenuUI

A Windows L&F implementation of PopupMenuUI. This implementation is a "combined" view/controller.

Field Summary

Fields

Modifier and Type	Field	Description
protected JPopupMenu	popupMenu	The instance of JPopupMenu.

Constructor Summary

Constructors

Constructor	Description
BasicPopupMenuUI()	Constructs a new instance of BasicPopupMenuUI.

Method Summary

Modifier and Type	Method	Description
static ComponentUI	createUI(JComponent x)	Constructs a new instance of BasicPopupMenuUI.
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.
boolean	isPopupTrigger(MouseEvent e)	Returns whether or not the given MouseEvent is the popup menu trigger event for the platform
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, getMaximumSize, getMinimumSize, getPreferredSize, paint, update

Methods inherited from class java.lang.Object

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

Methods inherited from class javax.swing.plaf.PopupMenuUI

getPopup

Field Detail

popupMenu

protected JPopupMenu popupMenu

The instance of JPopupMenu.

Constructor Detail

BasicPopupMenuUI

public BasicPopupMenuUI()

Constructs a new instance of BasicPopupMenuUI.

Method Detail

createUI

public static ComponentUI createUI(JComponent x)

Constructs a new instance of BasicPopupMenuUI.

Parameters:

x - a component

Returns:

a new instance of BasicPopupMenuUI

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

public 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.

isPopupTrigger

public boolean isPopupTrigger(MouseEvent e)

Description copied from class: PopupMenuUI

Returns whether or not the given MouseEvent is the popup menu trigger event for the platform

Overrides:

isPopupTrigger in class PopupMenuUI

Parameters:

e - a MouseEvent

Returns:

true if the MouseEvent e is the popup menu trigger