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, SynthMenuItemUI

public class BasicMenuItemUI
extends MenuItemUI

BasicMenuItem implementation

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	BasicMenuItemUI.MouseInputHandler	Deprecated, for removal: This API element is subject to removal in a future version.

Field Summary

Fields

Modifier and Type	Field	Description
protected String	acceleratorDelimiter	Accelerator delimiter string, such as '+' in 'Ctrl+C'.
protected Font	acceleratorFont	The accelerator font.
protected Color	acceleratorForeground	The color of the accelerator foreground.
protected Color	acceleratorSelectionForeground	The color of the accelerator selection.
protected Icon	arrowIcon	The arrow icon.
protected Icon	checkIcon	The check icon.
protected int	defaultTextIconGap	The gap between the text and the icon.
protected Color	disabledForeground	The color of the disabled foreground.
protected MenuDragMouseListener	menuDragMouseListener	The instance of MenuDragMouseListener.
protected JMenuItem	menuItem	The instance of JMenuItem.
protected MenuKeyListener	menuKeyListener	The instance of MenuKeyListener.
protected MouseInputListener	mouseInputListener	The instance of MouseInputListener.
protected boolean	oldBorderPainted	The value represents if the old border is painted.
protected PropertyChangeListener	propertyChangeListener	PropertyChangeListener returned from createPropertyChangeListener.
protected Color	selectionBackground	The color of the selection background.
protected Color	selectionForeground	The color of the selection foreground.

Constructor Summary

Constructors

Constructor	Description
BasicMenuItemUI()	Constructs a BasicMenuItemUI.

Method Summary

Modifier and Type	Method	Description
protected MenuDragMouseListener	createMenuDragMouseListener(JComponent c)	Returns an instance of MenuDragMouseListener.
protected MenuKeyListener	createMenuKeyListener(JComponent c)	Returns an instance of MenuKeyListener.
protected MouseInputListener	createMouseInputListener(JComponent c)	Returns an instance of MouseInputListener.
protected PropertyChangeListener	createPropertyChangeListener(JComponent c)	Creates a PropertyChangeListener which will be added to the menu item.
static ComponentUI	createUI(JComponent c)	Returns a new instance of BasicMenuItemUI.
protected void	doClick(MenuSelectionManager msm)	Call this method when a menu item is to be activated.
MenuElement[]	getPath()	Returns a menu element path.
protected Dimension	getPreferredMenuItemSize(JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap)	Returns the preferred size of a menu item.
protected String	getPropertyPrefix()	Returns a property prefix.
protected void	installComponents(JMenuItem menuItem)	Registers the subcomponents of the menu.
protected void	installDefaults()	Installs default properties.
protected void	installKeyboardActions()	Registers keyboard action.
protected void	installListeners()	Registers listeners.
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)	Paints a menu item.
protected void	paintText(Graphics g, JMenuItem menuItem, Rectangle textRect, String text)	Renders the text of the current menu item.
protected void	uninstallComponents(JMenuItem menuItem)	Unregisters components.
protected void	uninstallDefaults()	Uninstalls default properties.
protected void	uninstallKeyboardActions()	Unregisters keyboard actions.
protected void	uninstallListeners()	Unregisters listeners.
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 declared in class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMaximumSize, getMinimumSize, getPreferredSize, installUI, paint, uninstallUI

Methods declared in class java.lang.Object

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

Field Details

menuItem

protected JMenuItem menuItem

The instance of JMenuItem.

selectionBackground

protected Color selectionBackground

The color of the selection background.

selectionForeground

protected Color selectionForeground

The color of the selection foreground.

disabledForeground

protected Color disabledForeground

The color of the disabled foreground.

acceleratorForeground

protected Color acceleratorForeground

The color of the accelerator foreground.

acceleratorSelectionForeground

protected Color acceleratorSelectionForeground

The color of the accelerator selection.

acceleratorDelimiter

protected String acceleratorDelimiter

Accelerator delimiter string, such as '+' in 'Ctrl+C'.

Since:

1.7

defaultTextIconGap

protected int defaultTextIconGap

The gap between the text and the icon.

acceleratorFont

protected Font acceleratorFont

The accelerator font.

mouseInputListener

protected MouseInputListener mouseInputListener

The instance of MouseInputListener.

menuDragMouseListener

protected MenuDragMouseListener menuDragMouseListener

The instance of MenuDragMouseListener.

menuKeyListener

protected MenuKeyListener menuKeyListener

The instance of MenuKeyListener.

propertyChangeListener

protected PropertyChangeListener propertyChangeListener

PropertyChangeListener returned from createPropertyChangeListener. You should not need to access this field, rather if you want to customize the PropertyChangeListener override createPropertyChangeListener.

Since:

1.6

See Also:

• createPropertyChangeListener(javax.swing.JComponent)

arrowIcon

protected Icon arrowIcon

The arrow icon.

checkIcon

protected Icon checkIcon

The check icon.

oldBorderPainted

protected boolean oldBorderPainted

The value represents if the old border is painted.

Constructor Details

BasicMenuItemUI

public BasicMenuItemUI()

Constructs a BasicMenuItemUI.

Method Details

createUI

public static ComponentUI createUI(JComponent c)

Returns a new instance of BasicMenuItemUI.

Parameters:

c - a component

Returns:

a new instance of BasicMenuItemUI

installDefaults

protected void installDefaults()

Installs default properties.

installComponents

protected void installComponents(JMenuItem menuItem)

Registers the subcomponents of the menu.

Parameters:

menuItem - a menu item

Since:

1.3

getPropertyPrefix

protected String getPropertyPrefix()

Returns a property prefix.

Returns:

a property prefix

installListeners

protected void installListeners()

Registers listeners.

installKeyboardActions

protected void installKeyboardActions()

Registers keyboard action.

uninstallDefaults

protected void uninstallDefaults()

Uninstalls default properties.

uninstallComponents

protected void uninstallComponents(JMenuItem menuItem)

Unregisters components.

Parameters:

menuItem - a menu item

Since:

1.3

uninstallListeners

protected void uninstallListeners()

Unregisters listeners.

uninstallKeyboardActions

protected void uninstallKeyboardActions()

Unregisters keyboard actions.

createMouseInputListener

protected MouseInputListener createMouseInputListener(JComponent c)

Returns an instance of MouseInputListener.

Parameters:

c - a component

Returns:

an instance of MouseInputListener

createMenuDragMouseListener

protected MenuDragMouseListener createMenuDragMouseListener(JComponent c)

Returns an instance of MenuDragMouseListener.

Parameters:

c - a component

Returns:

an instance of MenuDragMouseListener

createMenuKeyListener

protected MenuKeyListener createMenuKeyListener(JComponent c)

Returns an instance of MenuKeyListener.

Parameters:

c - a component

Returns:

an instance of MenuKeyListener

createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener(JComponent c)

Creates a PropertyChangeListener which will be added to the menu item. If this method returns null then it will not be added to the menu item.

Parameters:

c - a component

Returns:

an instance of a PropertyChangeListener or null

Since:

1.6

getPreferredMenuItemSize

protected Dimension getPreferredMenuItemSize(JComponent c,
 Icon checkIcon,
 Icon arrowIcon,
 int defaultTextIconGap)

Returns the preferred size of a menu item.

Parameters:

c - a component

checkIcon - a check icon

arrowIcon - an arrow icon

defaultTextIconGap - a gap between a text and an icon

Returns:

the preferred size of a menu item

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)

paintMenuItem

protected void paintMenuItem(Graphics g,
 JComponent c,
 Icon checkIcon,
 Icon arrowIcon,
 Color background,
 Color foreground,
 int defaultTextIconGap)

Paints a menu item.

Parameters:

g - an instance of Graphics

c - a component

checkIcon - a check icon

arrowIcon - an arrow icon

background - a background color

foreground - a foreground color

defaultTextIconGap - a gap between a text and an icon

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()

Returns a menu element path.

Returns:

a menu element path

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)