JPopupMenu (Java 2 Platform SE v1.4.1_"07")

Overview | Package | Class | Use | Tree | Deprecated | Index | Help

JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## javax.swing
Class JPopupMenu

    java.lang.Object
      |
      +--java.awt.Component
            |
            +--java.awt.Container
                  |
                  +--javax.swing.JComponent
                        |
                        +--javax.swing.JPopupMenu

All Implemented Interfaces:
  Accessible, ImageObserver, MenuContainer, MenuElement, Serializable

Direct Known Subclasses:
  BasicComboPopup

public class JPopupMenu
extends JComponent
implements Accessible, MenuElement

An implementation of a popup menu -- a small window that pops up and displays a series of choices. A `JPopupMenu` is used for the menu that appears when the user selects an item on the menu bar. It is also used for "pull-right" menu that appears when the selects a menu item that activates it. Finally, a `JPopupMenu` can also be used anywhere else you want a menu to appear. For example, when the user right-clicks in a specified area.

For information and examples of using popup menus, see How to Use Menus in The Java Tutorial. For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the `JPopupMenu` key assignments.

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`.

Nested Class Summary
`protected class` | `JPopupMenu.AccessibleJPopupMenu` This class implements accessibility support for the `JPopupMenu` class.
`static class` | `JPopupMenu.Separator` A popup menu-specific separator.

Nested classes inherited from class javax.swing.JComponent
``

Nested classes inherited from class java.awt.Container
``

Nested classes inherited from class java.awt.Component
`Component.BltBufferStrategy, Component.FlipBufferStrategy`

Field Summary

Fields inherited from class javax.swing.JComponent
`accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW`

Fields inherited from class java.awt.Component
`BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

Fields inherited from interface java.awt.image.ImageObserver
`ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH`

Constructor Summary
`JPopupMenu()` Constructs a `JPopupMenu` without an "invoker".
`JPopupMenu(String label)` Constructs a `JPopupMenu` with the specified title.

Method Summary
`JMenuItem` | `add(Action a)` Appends a new menu item to the end of the menu which dispatches the specified `Action` object.
`JMenuItem` | `add(JMenuItem menuItem)` Appends the specified menu item to the end of this menu.
`JMenuItem` | `add(String s)` Creates a new menu item with the specified text and appends it to the end of this menu.
`void` | `addPopupMenuListener(PopupMenuListener l)` Adds a `PopupMenu` listener.
`void` | `addSeparator()` Appends a new separator at the end of the menu.
`protected PropertyChangeListener` | `createActionChangeListener(JMenuItem b)` Returns a properly configured `PropertyChangeListener` which updates the control as changes to the `Action` occur.
`protected JMenuItem` | `createActionComponent(Action a)` Factory method which creates the `JMenuItem` for `Actions` added to the `JPopupMenu`.
`protected void` | `firePopupMenuCanceled()` Notifies `PopupMenuListeners` that this popup menu is cancelled.
`protected void` | `firePopupMenuWillBecomeInvisible()` Notifies `PopupMenuListener`s that this popup menu will become invisible.
`protected void` | `firePopupMenuWillBecomeVisible()` Notifies `PopupMenuListener`s that this popup menu will become visible.
`AccessibleContext` | `getAccessibleContext()` Gets the AccessibleContext associated with this JPopupMenu.
`Component` | `getComponent()` Returns this `JPopupMenu` component.
`Component` | `getComponentAtIndex(int i)` Deprecated. replaced by `getComponent(int i)`
`int` | `getComponentIndex(Component c)` Returns the index of the specified component.
`static boolean` | `getDefaultLightWeightPopupEnabled()` Gets the `defaultLightWeightPopupEnabled` property, which by default is `true`.
`Component` | `getInvoker()` Returns the component which is the 'invoker' of this popup menu.
`String` | `getLabel()` Returns the popup menu's label
`Insets` | `getMargin()` Returns the margin, in pixels, between the popup menu's border and its containees.
`PopupMenuListener[]` | `getPopupMenuListeners()` Returns an array of all the `PopupMenuListener`s added to this JMenuItem with addPopupMenuListener().
`SingleSelectionModel` | `getSelectionModel()` Returns the model object that handles single selections.
`MenuElement[]` | `getSubElements()` Returns an array of `MenuElement`s containing the submenu for this menu component.
`PopupMenuUI` | `getUI()` Returns the look and feel (L&F) object that renders this component.
`String` | `getUIClassID()` Returns the name of the L&F class that renders this component.
`void` | `insert(Action a, int index)` Inserts a menu item for the specified `Action` object at a given position.
`void` | `insert(Component component, int index)` Inserts the specified component into the menu at a given position.
`boolean` | `isBorderPainted()` Checks whether the border should be painted.
`boolean` | `isLightWeightPopupEnabled()` Gets the `lightWeightPopupEnabled` property.
`boolean` | `isPopupTrigger(MouseEvent e)` Returns true if the `MouseEvent` is considered a popup trigger by the `JPopupMenu`'s currently installed UI.
`boolean` | `isVisible()` Returns true if the popup menu is visible (currently being displayed).
`void` | `menuSelectionChanged(boolean isIncluded)` Messaged when the menubar selection changes to activate or deactivate this menu.
`void` | `pack()` Lays out the container so that it uses the minimum space needed to display its contents.
`protected void` | `paintBorder(Graphics g)` Paints the popup menu's border if the `borderPainted` property is `true`.
`protected String` | `paramString()` Returns a string representation of this `JPopupMenu`.
`protected void` | `processFocusEvent(FocusEvent evt)` Processes focus events occurring on this component by dispatching them to any registered `FocusListener` objects.
`protected void` | `processKeyEvent(KeyEvent evt)` Processes key stroke events such as mnemonics and accelerators.
`void` | `processKeyEvent(KeyEvent e, MenuElement[] path, MenuSelectionManager manager)` This method is required to conform to the `MenuElement` interface, but it not implemented.
`void` | `processMouseEvent(MouseEvent event, MenuElement[] path, MenuSelectionManager manager)` This method is required to conform to the `MenuElement` interface, but it not implemented.
`void` | `remove(int pos)` Removes the component at the specified index from this popup menu.
`void` | `removePopupMenuListener(PopupMenuListener l)` Removes a `PopupMenu` listener.
`void` | `setBorderPainted(boolean b)` Sets whether the border should be painted.
`static void` | `setDefaultLightWeightPopupEnabled(boolean aFlag)` Sets the default value of the `lightWeightPopupEnabled` property.
`void` | `setInvoker(Component invoker)` Sets the invoker of this popup menu -- the component in which the popup menu menu is to be displayed.
`void` | `setLabel(String label)` Sets the popup menu's label.
`void` | `setLightWeightPopupEnabled(boolean aFlag)` Sets the value of the `lightWeightPopupEnabled` property, which by default is `true`.
`void` | `setLocation(int x, int y)` Sets the location of the upper left corner of the popup menu using x, y coordinates.
`void` | `setPopupSize(Dimension d)` Sets the size of the Popup window using a `Dimension` object.
`void` | `setPopupSize(int width, int height)` Sets the size of the Popup window to the specified width and height.
`void` | `setSelected(Component sel)` Sets the currently selected component, This will result in a change to the selection model.
`void` | `setSelectionModel(SingleSelectionModel model)` Sets the model object to handle single selections.
`void` | `setUI(PopupMenuUI ui)` Sets the L&F object that renders this component.
`void` | `setVisible(boolean b)` Sets the visibility of the popup menu.
`void` | `show(Component invoker, int x, int y)` Displays the popup menu at the position x,y in the coordinate space of the component invoker.
`void` | `updateUI()` Resets the UI property to a value from the current look and feel.

Methods inherited from class javax.swing.JComponent
`addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, unregisterKeyboardAction, update`

Methods inherited from class java.awt.Container
`add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree`

Methods inherited from class java.awt.Component
`action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle`

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

Constructor Detail

### JPopupMenu

    public JPopupMenu()

  Constructs a `JPopupMenu` without an "invoker".

### JPopupMenu

    public JPopupMenu(String label)

  Constructs a `JPopupMenu` with the specified title.

Parameters:
  `label` - the string that a UI may use to display as a title for the popup menu.

Method Detail

### setDefaultLightWeightPopupEnabled

    public static void setDefaultLightWeightPopupEnabled(boolean aFlag)

  Sets the default value of the `lightWeightPopupEnabled` property.

  Parameters:
    `aFlag` - `true` if popups can be lightweight, otherwise `false`
  See Also:
    `getDefaultLightWeightPopupEnabled()`, `setLightWeightPopupEnabled(boolean)`

### getDefaultLightWeightPopupEnabled

    public static boolean getDefaultLightWeightPopupEnabled()

  Gets the `defaultLightWeightPopupEnabled` property, which by default is `true`.

  Returns:
    the value of the `defaultLightWeightPopupEnabled` property
  See Also:
    `setDefaultLightWeightPopupEnabled(boolean)`

### getUI

    public PopupMenuUI getUI()

  Returns the look and feel (L&F) object that renders this component.

  Returns:
    the `PopupMenuUI` object that renders this component

### setUI

    public void setUI(PopupMenuUI ui)

  Sets the L&F object that renders this component.

  Parameters:
    `ui` - the new `PopupMenuUI` L&F object
  See Also:
    `UIDefaults.getUI(javax.swing.JComponent)`

### updateUI

    public void updateUI()

  Resets the UI property to a value from the current look and feel.

  Overrides:
    `updateUI` in class `JComponent`
  See Also:
    `JComponent.updateUI()`

### getUIClassID

    public String getUIClassID()

  Returns the name of the L&F class that renders this component.

  Overrides:
    `getUIClassID` in class `JComponent`
  Returns:
    the string "PopupMenuUI"
  See Also:
    `JComponent.getUIClassID()`, `UIDefaults.getUI(javax.swing.JComponent)`

### processFocusEvent

    protected void processFocusEvent(FocusEvent evt)

  Description copied from class: `Component`
  Processes focus events occurring on this component by dispatching them to any registered `FocusListener` objects.

  This method is not called unless focus events are enabled for this component. Focus events are enabled when one of the following occurs:

  - A `FocusListener` object is registered via `addFocusListener`.
  - Focus events are enabled via `enableEvents`.

  Note that if the event parameter is `null` the behavior is unspecified and may result in an exception.

  Overrides:
    `processFocusEvent` in class `Component`
  Parameters:
    `evt` - the focus event
  See Also:
    `FocusEvent`, `FocusListener`, `Component.addFocusListener(java.awt.event.FocusListener)`, `Component.enableEvents(long)`

### processKeyEvent

    protected void processKeyEvent(KeyEvent evt)

  Processes key stroke events such as mnemonics and accelerators.

  Overrides:
    `processKeyEvent` in class `JComponent`
  Parameters:
    `evt` - the key event to be processed
  See Also:
    `KeyEvent`, `KeyListener`, `Component.addKeyListener(java.awt.event.KeyListener)`, `Component.enableEvents(long)`, `Component.isShowing()`

### getSelectionModel

    public SingleSelectionModel getSelectionModel()

  Returns the model object that handles single selections.

  Returns:
    the `selectionModel` property
  See Also:
    `SingleSelectionModel`

### setSelectionModel

    public void setSelectionModel(SingleSelectionModel model)

  Sets the model object to handle single selections.

  Parameters:
    `model` - the new `SingleSelectionModel`
  See Also:
    `SingleSelectionModel`

### add

    public JMenuItem add(JMenuItem menuItem)

  Appends the specified menu item to the end of this menu.

  Returns:
    the `JMenuItem` added

### add

    public JMenuItem add(String s)

  Creates a new menu item with the specified text and appends it to the end of this menu.

  Parameters:
    `s` - the string for the menu item to be added

### add

    public JMenuItem add(Action a)

  Appends a new menu item to the end of the menu which dispatches the specified `Action` object. As of JDK 1.3, this is no longer the preferred method for adding `Actions` to a container. Instead it is recommended to configure a control with an action using `setAction`, and then add that control directly to the `Container`.

  Parameters:
    `a` - the `Action` to add to the menu
  Returns:
    the new menu item
  See Also:
    `Action`

### createActionComponent

    protected JMenuItem createActionComponent(Action a)

  Factory method which creates the `JMenuItem` for `Actions` added to the `JPopupMenu`. As of JDK 1.3, this is no longer the preferred method, instead it is recommended to configure a control with an action using `setAction`, and then adding that control directly to the `Container`.

  Parameters:
    `a` - the `Action` for the menu item to be added
  Returns:
    the new menu item
  Since:
    1.3
  See Also:
    `Action`

### createActionChangeListener

    protected PropertyChangeListener createActionChangeListener(JMenuItem b)

  Returns a properly configured `PropertyChangeListener` which updates the control as changes to the `Action` occur. As of JDK 1.3, this is no longer the preferred method for adding `Actions` to a container. Instead it is recommended to configure a control with an action using `setAction`, and then add that control directly to the `Container`.

### remove

    public void remove(int pos)

  Removes the component at the specified index from this popup menu.

  Overrides:
    `remove` in class `Container`
  Parameters:
    `pos` - the position of the item to be removed
  Throws:
    `IllegalArgumentException` - if the value of `pos` < 0, or if the value of `pos` is greater than the number of items
  See Also:
    `Container.add(java.awt.Component)`

### setLightWeightPopupEnabled

    public void setLightWeightPopupEnabled(boolean aFlag)

  Sets the value of the `lightWeightPopupEnabled` property, which by default is `true`. By default, when a look and feel displays a popup, it can choose to use a lightweight (all-Java) popup. Lightweight popup windows are more efficient than heavyweight (native peer) windows, but lightweight and heavyweight components do not mix well in a GUI. If your application mixes lightweight and heavyweight components, you should disable lightweight popups. Some look and feels might always use heavyweight popups, no matter what the value of this property.

  Parameters:
    `aFlag` - `false` to disable lightweight popups
  See Also:
    `isLightWeightPopupEnabled()`

### isLightWeightPopupEnabled

    public boolean isLightWeightPopupEnabled()

  Gets the `lightWeightPopupEnabled` property.

  Returns:
    the value of the `lightWeightPopupEnabled` property
  See Also:
    `setLightWeightPopupEnabled(boolean)`

### getLabel

    public String getLabel()

  Returns the popup menu's label

  Returns:
    a string containing the popup menu's label
  See Also:
    `setLabel(java.lang.String)`

### setLabel

    public void setLabel(String label)

  Sets the popup menu's label. Different look and feels may choose to display or not display this.

  Parameters:
    `label` - a string specifying the label for the popup menu
  See Also:
    `setLabel(java.lang.String)`

### addSeparator

    public void addSeparator()

  Appends a new separator at the end of the menu.

### insert

    public void insert(Action a,
                       int index)

  Inserts a menu item for the specified `Action` object at a given position.

  Parameters:
    `a` - the `Action` object to insert
    `index` - specifies the position at which to insert the `Action`, where 0 is the first
  Throws:
    `IllegalArgumentException` - if `index` < 0
  See Also:
    `Action`

### insert

    public void insert(Component component,
                       int index)

  Inserts the specified component into the menu at a given position.

  Parameters:
    `component` - the `Component` to insert
    `index` - specifies the position at which to insert the component, where 0 is the first
  Throws:
    `IllegalArgumentException` - if `index` < 0

### addPopupMenuListener

    public void addPopupMenuListener(PopupMenuListener l)

  Adds a `PopupMenu` listener.

  Parameters:
    `l` - the `PopupMenuListener` to add

### removePopupMenuListener

    public void removePopupMenuListener(PopupMenuListener l)

  Removes a `PopupMenu` listener.

  Parameters:
    `l` - the `PopupMenuListener` to remove

### getPopupMenuListeners

    public PopupMenuListener[] getPopupMenuListeners()

  Returns an array of all the `PopupMenuListener`s added to this JMenuItem with addPopupMenuListener().

  Returns:
    all of the `PopupMenuListener`s added or an empty array if no listeners have been added
  Since:
    1.4

### firePopupMenuWillBecomeVisible

    protected void firePopupMenuWillBecomeVisible()

  Notifies `PopupMenuListener`s that this popup menu will become visible.

### firePopupMenuWillBecomeInvisible

    protected void firePopupMenuWillBecomeInvisible()

  Notifies `PopupMenuListener`s that this popup menu will become invisible.

### firePopupMenuCanceled

    protected void firePopupMenuCanceled()

  Notifies `PopupMenuListeners` that this popup menu is cancelled.

### pack

    public void pack()

  Lays out the container so that it uses the minimum space needed to display its contents.

### setVisible

    public void setVisible(boolean b)

  Sets the visibility of the popup menu.

  Overrides:
    `setVisible` in class `JComponent`
  Parameters:
    `b` - true to make the popup visible, or false to hide it

### isVisible

    public boolean isVisible()

  Returns true if the popup menu is visible (currently being displayed).

  Overrides:
    `isVisible` in class `Component`
  Returns:
    `true` if the component is visible, `false` otherwise
  See Also:
    `Component.setVisible(boolean)`

### setLocation

    public void setLocation(int x,
                            int y)

  Sets the location of the upper left corner of the popup menu using x, y coordinates.

  Overrides:
    `setLocation` in class `Component`
  Parameters:
    `x` - the x coordinate of the popup's new position
    `y` - the y coordinate of the popup's new position
  See Also:
    `Component.getLocation()`, `Component.setBounds(int, int, int, int)`

### getInvoker

    public Component getInvoker()

  Returns the component which is the 'invoker' of this popup menu.

  Returns:
    the `Component` in which the popup menu is displayed

### setInvoker

    public void setInvoker(Component invoker)

  Sets the invoker of this popup menu -- the component in which the popup menu menu is to be displayed.

  Parameters:
    `invoker` - the `Component` in which the popup menu is displayed

### show

    public void show(Component invoker,
                     int x,
                     int y)

  Displays the popup menu at the position x,y in the coordinate space of the component invoker.

  Parameters:
    `invoker` - the component in whose space the popup menu is to appear
    `x` - the x coordinate in invoker's coordinate space at which the popup menu is to be displayed
    `y` - the y coordinate in invoker's coordinate space at which the popup menu is to be displayed

### getComponentAtIndex

    public Component getComponentAtIndex(int i)

  Deprecated. replaced by `getComponent(int i)`

  Returns the component at the specified index.

  Parameters:
    `i` - the index of the component, where 0 is the first
  Returns:
    the `Component` at that index

### getComponentIndex

    public int getComponentIndex(Component c)

  Returns the index of the specified component.

  Returns:
    the index of the component, where 0 is the first; or -1 if the component is not found

### setPopupSize

    public void setPopupSize(Dimension d)

  Sets the size of the Popup window using a `Dimension` object. This is equivalent to `setPreferredSize(d)`.

  Parameters:
    `d` - the `Dimension` specifying the new size of this component.

### setPopupSize

    public void setPopupSize(int width,
                             int height)

  Sets the size of the Popup window to the specified width and height. This is equivalent to `setPreferredSize(new Dimension(width, height))`.

### setSelected

    public void setSelected(Component sel)

  Sets the currently selected component, This will result in a change to the selection model.

  Parameters:
    `sel` - the `Component` to select

### isBorderPainted

    public boolean isBorderPainted()

  Checks whether the border should be painted.

  Returns:
    true if the border is painted, false otherwise
  See Also:
    `setBorderPainted(boolean)`

### setBorderPainted

    public void setBorderPainted(boolean b)

  Sets whether the border should be painted.

  Parameters:
    `b` - if true, the border is painted.
  See Also:
    `isBorderPainted()`

### paintBorder

    protected void paintBorder(Graphics g)

  Paints the popup menu's border if the `borderPainted` property is `true`.

  Overrides:
    `paintBorder` in class `JComponent`
  Parameters:
    `g` - the `Graphics` object
  See Also:
    `JComponent.paint(java.awt.Graphics)`, `JComponent.setBorder(javax.swing.border.Border)`

### getMargin

    public Insets getMargin()

  Returns the margin, in pixels, between the popup menu's border and its containees.

  Returns:
    an `Insets` object containing the margin values.

### paramString

    protected String paramString()

  Returns a string representation of this `JPopupMenu`. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be `null`.

  Overrides:
    `paramString` in class `JComponent`
  Returns:
    a string representation of this `JPopupMenu`.

### getAccessibleContext

    public AccessibleContext getAccessibleContext()

  Gets the AccessibleContext associated with this JPopupMenu. For JPopupMenus, the AccessibleContext takes the form of an AccessibleJPopupMenu. A new AccessibleJPopupMenu instance is created if necessary.

  Specified by:
    `getAccessibleContext` in interface `Accessible`
  Overrides:
    `getAccessibleContext` in class `JComponent`
  Returns:
    an AccessibleJPopupMenu that serves as the AccessibleContext of this JPopupMenu

### processMouseEvent

    public void processMouseEvent(MouseEvent event,
                                  MenuElement[] path,
                                  MenuSelectionManager manager)

  This method is required to conform to the `MenuElement` interface, but it not implemented.

  Specified by:
    `processMouseEvent` in interface `MenuElement`
  See Also:
    `MenuElement.processMouseEvent(MouseEvent, MenuElement[], MenuSelectionManager)`

### processKeyEvent

    public void processKeyEvent(KeyEvent e,
                                MenuElement[] path,
                                MenuSelectionManager manager)

  This method is required to conform to the `MenuElement` interface, but it not implemented.

  Specified by:
    `processKeyEvent` in interface `MenuElement`
  See Also:
    `MenuElement.processKeyEvent(KeyEvent, MenuElement[], MenuSelectionManager)`

### menuSelectionChanged

    public void menuSelectionChanged(boolean isIncluded)

  Messaged when the menubar selection changes to activate or deactivate this menu. This implements the `javax.swing.MenuElement` interface. Overrides `MenuElement.menuSelectionChanged`.

  Specified by:
    `menuSelectionChanged` in interface `MenuElement`
  Parameters:
    `isIncluded` - true if this menu is active, false if it is not
  See Also:
    `MenuElement.menuSelectionChanged(boolean)`

### getSubElements

    public MenuElement[] getSubElements()

  Returns an array of `MenuElement`s containing the submenu for this menu component. It will only return items conforming to the `JMenuElement` interface. If popup menu is `null` returns an empty array. This method is required to conform to the `MenuElement` interface.

  Specified by:
    `getSubElements` in interface `MenuElement`
  Returns:
    an array of `MenuElement` objects
  See Also:
    `MenuElement.getSubElements()`

### getComponent

    public Component getComponent()

  Returns this `JPopupMenu` component.

  Specified by:
    `getComponent` in interface `MenuElement`
  Returns:
    this `JPopupMenu` object
  See Also:
    `MenuElement.getComponent()`

### isPopupTrigger

    public boolean isPopupTrigger(MouseEvent e)

  Returns true if the `MouseEvent` is considered a popup trigger by the `JPopupMenu`'s currently installed UI.

  Returns:
    true if the mouse event is a popup trigger
  Since:
    1.3

Overview | Package | Class | Use | Tree | Deprecated | Index | Help

JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.