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javax.swing
Class JPopupMenu
java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JPopupMenu
-
All Implemented Interfaces:
-
ImageObserver
,
MenuContainer
,
Serializable
,
Accessible
,
MenuElement
-
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.
Warning: Swing is not thread safe. For more information see
Swing's Threading Policy
.
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
TM
has been added to the java.beans package. Please see
XMLEncoder
.
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 |
addMenuKeyListener
(
MenuKeyListener
l)
Adds a MenuKeyListener to the popup 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 PopupMenuListeners that this popup menu will become invisible. |
protected void |
firePopupMenuWillBecomeVisible
()
Notifies PopupMenuListeners 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
Container.getComponent(int)
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. |
MenuKeyListener
[] |
getMenuKeyListeners
()
Returns an array of all the MenuKeyListeners added to this JPopupMenu with addMenuKeyListener(). |
PopupMenuListener
[] |
getPopupMenuListeners
()
Returns an array of all the PopupMenuListeners added to this JMenuItem with addPopupMenuListener(). |
SingleSelectionModel
|
getSelectionModel
()
Returns the model object that handles single selections. |
MenuElement
[] |
getSubElements
()
Returns an array of MenuElements 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)
Processes a key event forwarded from the MenuSelectionManager and changes the menu selection, if necessary, by using MenuSelectionManager's API. |
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 |
removeMenuKeyListener
(
MenuKeyListener
l)
Removes a MenuKeyListener from the 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
,
addVetoableChangeListener
,
computeVisibleRect
,
contains
,
createToolTip
,
disable
,
enable
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
fireVetoableChange
,
getActionForKeyStroke
,
getActionMap
,
getAlignmentX
,
getAlignmentY
,
getAncestorListeners
,
getAutoscrolls
,
getBaseline
,
getBaselineResizeBehavior
,
getBorder
,
getBounds
,
getClientProperty
,
getComponentGraphics
,
getComponentPopupMenu
,
getConditionForKeyStroke
,
getDebugGraphicsOptions
,
getDefaultLocale
,
getFontMetrics
,
getGraphics
,
getHeight
,
getInheritsPopupMenu
,
getInputMap
,
getInputMap
,
getInputVerifier
,
getInsets
,
getInsets
,
getListeners
,
getLocation
,
getMaximumSize
,
getMinimumSize
,
getNextFocusableComponent
,
getPopupLocation
,
getPreferredSize
,
getRegisteredKeyStrokes
,
getRootPane
,
getSize
,
getToolTipLocation
,
getToolTipText
,
getToolTipText
,
getTopLevelAncestor
,
getTransferHandler
,
getVerifyInputWhenFocusTarget
,
getVetoableChangeListeners
,
getVisibleRect
,
getWidth
,
getX
,
getY
,
grabFocus
,
isDoubleBuffered
,
isLightweightComponent
,
isManagingFocus
,
isOpaque
,
isOptimizedDrawingEnabled
,
isPaintingForPrint
,
isPaintingTile
,
isRequestFocusEnabled
,
isValidateRoot
,
paint
,
paintChildren
,
paintComponent
,
paintImmediately
,
paintImmediately
,
print
,
printAll
,
printBorder
,
printChildren
,
printComponent
,
processComponentKeyEvent
,
processKeyBinding
,
processMouseEvent
,
processMouseMotionEvent
,
putClientProperty
,
registerKeyboardAction
,
registerKeyboardAction
,
removeAncestorListener
,
removeNotify
,
removeVetoableChangeListener
,
repaint
,
repaint
,
requestDefaultFocus
,
requestFocus
,
requestFocus
,
requestFocusInWindow
,
requestFocusInWindow
,
resetKeyboardActions
,
reshape
,
revalidate
,
scrollRectToVisible
,
setActionMap
,
setAlignmentX
,
setAlignmentY
,
setAutoscrolls
,
setBackground
,
setBorder
,
setComponentPopupMenu
,
setDebugGraphicsOptions
,
setDefaultLocale
,
setDoubleBuffered
,
setEnabled
,
setFocusTraversalKeys
,
setFont
,
setForeground
,
setInheritsPopupMenu
,
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
,
addPropertyChangeListener
,
addPropertyChangeListener
,
applyComponentOrientation
,
areFocusTraversalKeysSet
,
countComponents
,
deliverEvent
,
doLayout
,
findComponentAt
,
findComponentAt
,
getComponent
,
getComponentAt
,
getComponentAt
,
getComponentCount
,
getComponents
,
getComponentZOrder
,
getContainerListeners
,
getFocusTraversalKeys
,
getFocusTraversalPolicy
,
getLayout
,
getMousePosition
,
insets
,
invalidate
,
isAncestorOf
,
isFocusCycleRoot
,
isFocusCycleRoot
,
isFocusTraversalPolicyProvider
,
isFocusTraversalPolicySet
,
layout
,
list
,
list
,
locate
,
minimumSize
,
paintComponents
,
preferredSize
,
printComponents
,
processContainerEvent
,
processEvent
,
remove
,
removeAll
,
removeContainerListener
,
setComponentZOrder
,
setFocusCycleRoot
,
setFocusTraversalPolicy
,
setFocusTraversalPolicyProvider
,
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
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
getBackground
,
getBounds
,
getColorModel
,
getComponentListeners
,
getComponentOrientation
,
getCursor
,
getDropTarget
,
getFocusCycleRootAncestor
,
getFocusListeners
,
getFocusTraversalKeysEnabled
,
getFont
,
getForeground
,
getGraphicsConfiguration
,
getHierarchyBoundsListeners
,
getHierarchyListeners
,
getIgnoreRepaint
,
getInputContext
,
getInputMethodListeners
,
getInputMethodRequests
,
getKeyListeners
,
getLocale
,
getLocation
,
getLocationOnScreen
,
getMouseListeners
,
getMouseMotionListeners
,
getMousePosition
,
getMouseWheelListeners
,
getName
,
getParent
,
getPeer
,
getPropertyChangeListeners
,
getPropertyChangeListeners
,
getSize
,
getToolkit
,
getTreeLock
,
gotFocus
,
handleEvent
,
hasFocus
,
hide
,
imageUpdate
,
inside
,
isBackgroundSet
,
isCursorSet
,
isDisplayable
,
isEnabled
,
isFocusable
,
isFocusOwner
,
isFocusTraversable
,
isFontSet
,
isForegroundSet
,
isLightweight
,
isMaximumSizeSet
,
isMinimumSizeSet
,
isPreferredSizeSet
,
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
,
processMouseWheelEvent
,
remove
,
removeComponentListener
,
removeFocusListener
,
removeHierarchyBoundsListener
,
removeHierarchyListener
,
removeInputMethodListener
,
removeKeyListener
,
removeMouseListener
,
removeMouseMotionListener
,
removeMouseWheelListener
,
removePropertyChangeListener
,
removePropertyChangeListener
,
repaint
,
repaint
,
repaint
,
resize
,
resize
,
setBounds
,
setBounds
,
setComponentOrientation
,
setCursor
,
setDropTarget
,
setFocusable
,
setFocusTraversalKeysEnabled
,
setIgnoreRepaint
,
setLocale
,
setLocation
,
setName
,
setSize
,
setSize
,
show
,
show
,
size
,
toString
,
transferFocus
,
transferFocusUpCycle
|
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.
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.
If focus events are enabled for a Component, the current KeyboardFocusManager determines whether or not a focus event should be dispatched to registered FocusListener objects. If the events are to be dispatched, the KeyboardFocusManager calls the Component's dispatchEvent method, which results in a call to the Component's processFocusEvent method.
If focus events are enabled for a Component, calling the Component's dispatchEvent method with a FocusEvent as the argument will result in a call to the Component's processFocusEvent method regardless of the current KeyboardFocusManager.
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
,
KeyboardFocusManager
,
Component.addFocusListener(java.awt.event.FocusListener)
,
Component.enableEvents(long)
,
Component.dispatchEvent(java.awt.AWTEvent)
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
,
KeyboardFocusManager
,
DefaultKeyboardFocusManager
,
Component.processEvent(java.awt.AWTEvent)
,
Component.dispatchEvent(java.awt.AWTEvent)
,
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.
-
-
-
Parameters:
-
menuItem - the JMenuItem to add
-
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.
-
-
-
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.
-
-
-
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.
-
-
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)
,
Container.validate()
,
Container.getComponentCount()
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 PopupMenuListeners added to this JMenuItem with addPopupMenuListener().
-
-
-
Returns:
-
all of the PopupMenuListeners added or an empty array if no listeners have been added
-
Since:
-
1.4
addMenuKeyListener
public void addMenuKeyListener(MenuKeyListener l)
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Adds a MenuKeyListener to the popup menu.
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Parameters:
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l - the MenuKeyListener to be added
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Since:
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1.5
removeMenuKeyListener
public void removeMenuKeyListener(MenuKeyListener l)
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Removes a MenuKeyListener from the popup menu.
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Parameters:
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l - the MenuKeyListener to be removed
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Since:
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1.5
getMenuKeyListeners
public MenuKeyListener[] getMenuKeyListeners()
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Returns an array of all the MenuKeyListeners added to this JPopupMenu with addMenuKeyListener().
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Returns:
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all of the MenuKeyListeners added or an empty array if no listeners have been added
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Since:
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1.5
firePopupMenuWillBecomeVisible
protected void firePopupMenuWillBecomeVisible()
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Notifies PopupMenuListeners that this popup menu will become visible.
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firePopupMenuWillBecomeInvisible
protected void firePopupMenuWillBecomeInvisible()
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Notifies PopupMenuListeners that this popup menu will become invisible.
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firePopupMenuCanceled
protected void firePopupMenuCanceled()
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Notifies PopupMenuListeners that this popup menu is cancelled.
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pack
public void pack()
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Lays out the container so that it uses the minimum space needed to display its contents.
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setVisible
public void setVisible(boolean b)
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Sets the visibility of the popup menu.
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Overrides:
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setVisible
in class
JComponent
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Parameters:
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b - true to make the popup visible, or false to hide it
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See Also:
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Component.isVisible()
isVisible
public boolean isVisible()
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Returns true if the popup menu is visible (currently being displayed).
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Overrides:
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isVisible
in class
Component
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Returns:
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true if the component is visible, false otherwise
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See Also:
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Component.setVisible(boolean)
setLocation
public void setLocation(int x,
int y)
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Sets the location of the upper left corner of the popup menu using x, y coordinates.
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Overrides:
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setLocation
in class
Component
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Parameters:
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x - the x coordinate of the popup's new position in the screen's coordinate space
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y - the y coordinate of the popup's new position in the screen's coordinate space
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See Also:
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Component.getLocation()
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Component.setBounds(int, int, int, int)
getInvoker
public Component getInvoker()
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Returns the component which is the 'invoker' of this popup menu.
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Returns:
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the Component in which the popup menu is displayed
setInvoker
public void setInvoker(Component invoker)
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Sets the invoker of this popup menu -- the component in which the popup menu menu is to be displayed.
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Parameters:
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invoker - the Component in which the popup menu is displayed
show
public void show(Component invoker,
int x,
int y)
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Displays the popup menu at the position x,y in the coordinate space of the component invoker.
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Parameters:
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invoker - the component in whose space the popup menu is to appear
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x - the x coordinate in invoker's coordinate space at which the popup menu is to be displayed
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y - the y coordinate in invoker's coordinate space at which the popup menu is to be displayed
getComponentAtIndex
@Deprecated
public Component getComponentAtIndex(int i)
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Deprecated.
replaced by
Container.getComponent(int)
getComponent(int i)
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Returns the component at the specified index.
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Parameters:
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i - the index of the component, where 0 is the first
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Returns:
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the Component at that index
getComponentIndex
public int getComponentIndex(Component c)
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Returns the index of the specified component.
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Parameters:
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c - the Component to find
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Returns:
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the index of the component, where 0 is the first; or -1 if the component is not found
setPopupSize
public void setPopupSize(Dimension d)
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Sets the size of the Popup window using a Dimension object. This is equivalent to setPreferredSize(d).
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Parameters:
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d - the Dimension specifying the new size of this component.
setPopupSize
public void setPopupSize(int width,
int height)
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Sets the size of the Popup window to the specified width and height. This is equivalent to setPreferredSize(new Dimension(width, height)).
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Parameters:
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width - the new width of the Popup in pixels
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height - the new height of the Popup in pixels
setSelected
public void setSelected(Component sel)
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Sets the currently selected component, This will result in a change to the selection model.
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Parameters:
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sel - the Component to select
isBorderPainted
public boolean isBorderPainted()
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Checks whether the border should be painted.
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Returns:
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true if the border is painted, false otherwise
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See Also:
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setBorderPainted(boolean)
setBorderPainted
public void setBorderPainted(boolean b)
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Sets whether the border should be painted.
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Parameters:
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b - if true, the border is painted.
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See Also:
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isBorderPainted()
paintBorder
protected void paintBorder(Graphics g)
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Paints the popup menu's border if the borderPainted property is true.
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Overrides:
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paintBorder
in class
JComponent
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Parameters:
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g - the Graphics object
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See Also:
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JComponent.paint(java.awt.Graphics)
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JComponent.setBorder(javax.swing.border.Border)
getMargin
public Insets getMargin()
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Returns the margin, in pixels, between the popup menu's border and its containees.
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Returns:
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an Insets object containing the margin values.
paramString
protected String paramString()
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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.
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Overrides:
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paramString
in class
JComponent
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Returns:
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a string representation of this JPopupMenu.
getAccessibleContext
public AccessibleContext getAccessibleContext()
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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.
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Specified by:
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getAccessibleContext
in interface
Accessible
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Overrides:
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getAccessibleContext
in class
JComponent
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Returns:
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an AccessibleJPopupMenu that serves as the AccessibleContext of this JPopupMenu
processMouseEvent
public void processMouseEvent(MouseEvent event,
MenuElement[] path,
MenuSelectionManager manager)
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This method is required to conform to the MenuElement interface, but it not implemented.
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Specified by:
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processMouseEvent
in interface
MenuElement
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See Also:
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MenuElement.processMouseEvent(MouseEvent, MenuElement[], MenuSelectionManager)
processKeyEvent
public void processKeyEvent(KeyEvent e,
MenuElement[] path,
MenuSelectionManager manager)
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Processes a key event forwarded from the MenuSelectionManager and changes the menu selection, if necessary, by using MenuSelectionManager's API.
Note: you do not have to forward the event to sub-components. This is done automatically by the MenuSelectionManager.
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Specified by:
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processKeyEvent
in interface
MenuElement
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Parameters:
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e - a KeyEvent
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path - the MenuElement path array
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manager - the MenuSelectionManager
menuSelectionChanged
public void menuSelectionChanged(boolean isIncluded)
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Messaged when the menubar selection changes to activate or deactivate this menu. This implements the javax.swing.MenuElement interface. Overrides MenuElement.menuSelectionChanged.
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Specified by:
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menuSelectionChanged
in interface
MenuElement
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Parameters:
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isIncluded - true if this menu is active, false if it is not
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See Also:
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MenuElement.menuSelectionChanged(boolean)
getSubElements
public MenuElement[] getSubElements()
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Returns an array of MenuElements 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.
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Specified by:
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getSubElements
in interface
MenuElement
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Returns:
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an array of MenuElement objects
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See Also:
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MenuElement.getSubElements()
getComponent
public Component getComponent()
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Returns this JPopupMenu component.
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Specified by:
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getComponent
in interface
MenuElement
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Returns:
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this JPopupMenu object
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See Also:
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MenuElement.getComponent()
isPopupTrigger
public boolean isPopupTrigger(MouseEvent e)
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Returns true if the MouseEvent is considered a popup trigger by the JPopupMenu's currently installed UI.
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Returns:
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true if the mouse event is a popup trigger
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Since:
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1.3