BasicComboPopup

java.lang.Object
- java.awt.Component
- - java.awt.Container
  - - javax.swing.JComponent
    - - javax.swing.JPopupMenu
      - javax.swing.plaf.basic.BasicComboPopup

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible, MenuElement, ComboPopup

Direct Known Subclasses:

MetalComboBoxUI.MetalComboPopup
```
public class BasicComboPopup
extends JPopupMenu
implements ComboPopup
```
This is a basic implementation of the ComboPopup interface. This class represents the ui for the popup portion of the combo box.
All event handling is handled by listener classes created with the createxxxListener() methods and internal classes. You can change the behavior of this class by overriding the createxxxListener() methods and supplying your own event listeners or subclassing from the ones supplied in this class.

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™ has been added to the java.beans package. Please see XMLEncoder.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
`class`	`BasicComboPopup.InvocationKeyHandler` As of Java 2 platform v 1.4, this class is now obsolete and is only included for backwards API compatibility.
`protected class`	`BasicComboPopup.InvocationMouseHandler` A listener to be registered upon the combo box ( not its popup menu) to handle mouse events that affect the state of the popup menu.
`protected class`	`BasicComboPopup.InvocationMouseMotionHandler` This listener watches for dragging and updates the current selection in the list if it is dragging over the list.
`protected class`	`BasicComboPopup.ItemHandler` This listener watches for changes to the selection in the combo box.
`class`	`BasicComboPopup.ListDataHandler` As of 1.4, this class is now obsolete, doesn't do anything, and is only included for backwards API compatibility.
`protected class`	`BasicComboPopup.ListMouseHandler` This listener hides the popup when the mouse is released in the list.
`protected class`	`BasicComboPopup.ListMouseMotionHandler` This listener changes the selected item as you move the mouse over the list.
`protected class`	`BasicComboPopup.ListSelectionHandler` As of Java 2 platform v 1.4, this class is now obsolete, doesn't do anything, and is only included for backwards API compatibility.
`protected class`	`BasicComboPopup.PropertyChangeHandler` This listener watches for bound properties that have changed in the combo box.

Nested classes/interfaces inherited from class javax.swing.JPopupMenu
JPopupMenu.AccessibleJPopupMenu, JPopupMenu.Separator

Nested classes/interfaces inherited from class javax.swing.JComponent
JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container
Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field and Description
`protected Timer`	`autoscrollTimer` This protected field is implementation specific.
`protected JComboBox`	`comboBox`
`protected boolean`	`hasEntered`
`protected boolean`	`isAutoScrolling`
`protected ItemListener`	`itemListener` This protected field is implementation specific.
`protected KeyListener`	`keyListener` This protected field is implementation specific.
`protected JList`	`list` This protected field is implementation specific.
`protected ListDataListener`	`listDataListener` This protected field is implementation specific.
`protected MouseListener`	`listMouseListener` This protected field is implementation specific.
`protected MouseMotionListener`	`listMouseMotionListener` This protected field is implementation specific.
`protected ListSelectionListener`	`listSelectionListener` This protected field is implementation specific.
`protected MouseListener`	`mouseListener` This protected field is implementation specific.
`protected MouseMotionListener`	`mouseMotionListener` This protected field is implementation specific.
`protected PropertyChangeListener`	`propertyChangeListener` This protected field is implementation specific.
`protected static int`	`SCROLL_DOWN`
`protected static int`	`SCROLL_UP`
`protected int`	`scrollDirection`
`protected JScrollPane`	`scroller` This protected field is implementation specific.
`protected boolean`	`valueIsAdjusting` As of Java 2 platform v1.4 this previously undocumented field is no longer used.

Fields inherited from class javax.swing.JComponent
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
accessibleContext, 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

Constructors

Constructor and Description
`BasicComboPopup(JComboBox combo)`

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`protected void`	`autoScrollDown()` This protected method is implementation specific and should be private.
`protected void`	`autoScrollUp()` This protected method is implementation specific and should be private.
`protected Rectangle`	`computePopupBounds(int px, int py, int pw, int ph)` Calculate the placement and size of the popup portion of the combo box based on the combo box location and the enclosing screen bounds.
`protected void`	`configureList()` Configures the list which is used to hold the combo box items in the popup.
`protected void`	`configurePopup()` Configures the popup portion of the combo box.
`protected void`	`configureScroller()` Configures the scrollable portion which holds the list within the combo box popup.
`protected MouseEvent`	`convertMouseEvent(MouseEvent e)`
`protected ItemListener`	`createItemListener()` Creates an `ItemListener` which will be added to the combo box.
`protected KeyListener`	`createKeyListener()` Creates the key listener that will be added to the combo box.
`protected JList`	`createList()` Creates the JList used in the popup to display the items in the combo box model.
`protected ListDataListener`	`createListDataListener()` Creates a list data listener which will be added to the `ComboBoxModel`.
`protected MouseListener`	`createListMouseListener()` Creates a mouse listener that watches for mouse events in the popup's list.
`protected MouseMotionListener`	`createListMouseMotionListener()` Creates a mouse motion listener that watches for mouse motion events in the popup's list.
`protected ListSelectionListener`	`createListSelectionListener()` Creates a list selection listener that watches for selection changes in the popup's list.
`protected MouseListener`	`createMouseListener()` Creates a listener that will watch for mouse-press and release events on the combo box.
`protected MouseMotionListener`	`createMouseMotionListener()` Creates the mouse motion listener which will be added to the combo box.
`protected PropertyChangeListener`	`createPropertyChangeListener()` Creates a `PropertyChangeListener` which will be added to the combo box.
`protected JScrollPane`	`createScroller()` Creates the scroll pane which houses the scrollable list.
`protected void`	`delegateFocus(MouseEvent e)` This is is a utility method that helps event handlers figure out where to send the focus when the popup is brought up.
`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 BasicComboPopup.
`KeyListener`	`getKeyListener()` Implementation of ComboPopup.getKeyListener().
`JList`	`getList()` Implementation of ComboPopup.getList().
`MouseListener`	`getMouseListener()` Implementation of ComboPopup.getMouseListener().
`MouseMotionListener`	`getMouseMotionListener()` Implementation of ComboPopup.getMouseMotionListener().
`protected int`	`getPopupHeightForRowCount(int maxRowCount)` Retrieves the height of the popup based on the current ListCellRenderer and the maximum row count.
`void`	`hide()` Implementation of ComboPopup.hide().
`protected void`	`installComboBoxListeners()` This method adds the necessary listeners to the JComboBox.
`protected void`	`installComboBoxModelListeners(ComboBoxModel model)` Installs the listeners on the combo box model.
`protected void`	`installKeyboardActions()`
`protected void`	`installListListeners()` Adds the listeners to the list control.
`boolean`	`isFocusTraversable()` Overridden to unconditionally return false.
`void`	`show()` Implementation of ComboPopup.show().
`protected void`	`startAutoScrolling(int direction)` This protected method is implementation specific and should be private.
`protected void`	`stopAutoScrolling()` This protected method is implementation specific and should be private.
`protected void`	`togglePopup()` Makes the popup visible if it is hidden and makes it hidden if it is visible.
`protected void`	`uninstallComboBoxModelListeners(ComboBoxModel model)` Removes the listeners from the combo box model
`void`	`uninstallingUI()` Called when the UI is uninstalling.
`protected void`	`uninstallKeyboardActions()`
`protected void`	`updateListBoxSelectionForEvent(MouseEvent anEvent, boolean shouldScroll)` A utility method used by the event listeners.

Methods inherited from class javax.swing.JPopupMenu
add, add, add, addMenuKeyListener, addPopupMenuListener, addSeparator, createActionChangeListener, createActionComponent, getComponent, getComponentAtIndex, getComponentIndex, getDefaultLightWeightPopupEnabled, getInvoker, getLabel, getMargin, getMenuKeyListeners, getPopupMenuListeners, getSelectionModel, getSubElements, getUI, getUIClassID, insert, insert, isBorderPainted, isLightWeightPopupEnabled, isPopupTrigger, isVisible, menuSelectionChanged, pack, paintBorder, paramString, processFocusEvent, processKeyEvent, processKeyEvent, processMouseEvent, remove, removeMenuKeyListener, removePopupMenuListener, setBorderPainted, setDefaultLightWeightPopupEnabled, setInvoker, setLabel, setLightWeightPopupEnabled, setLocation, setPopupSize, setPopupSize, setSelected, setSelectionModel, setUI, setVisible, show, updateUI

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, isPaintingOrigin, 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, 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, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, 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, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

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

Methods inherited from interface javax.swing.plaf.basic.ComboPopup
isVisible

- Field Detail
  - comboBox
```
protected JComboBox comboBox
```
  - list
```
protected JList list
```
    This protected field is implementation specific. Do not access directly or override. Use the accessor methods instead.
    
    See Also:
    
    getList(), createList()
  - scroller
```
protected JScrollPane scroller
```
    This protected field is implementation specific. Do not access directly or override. Use the create method instead
    
    See Also:
    
    createScroller()
  - valueIsAdjusting
```
protected boolean valueIsAdjusting
```
    As of Java 2 platform v1.4 this previously undocumented field is no longer used.
  - mouseMotionListener
```
protected MouseMotionListener mouseMotionListener
```
    This protected field is implementation specific. Do not access directly or override. Use the accessor or create methods instead.
    
    See Also:
    
    getMouseMotionListener(), createMouseMotionListener()
  - mouseListener
```
protected MouseListener mouseListener
```
    This protected field is implementation specific. Do not access directly or override. Use the accessor or create methods instead.
    
    See Also:
    
    getMouseListener(), createMouseListener()
  - keyListener
```
protected KeyListener keyListener
```
    This protected field is implementation specific. Do not access directly or override. Use the accessor or create methods instead.
    
    See Also:
    
    getKeyListener(), createKeyListener()
  - listSelectionListener
```
protected ListSelectionListener listSelectionListener
```
    This protected field is implementation specific. Do not access directly or override. Use the create method instead.
    
    See Also:
    
    createListSelectionListener()
  - listMouseListener
```
protected MouseListener listMouseListener
```
    This protected field is implementation specific. Do not access directly or override. Use the create method instead.
    
    See Also:
    
    createListMouseListener()
  - listMouseMotionListener
```
protected MouseMotionListener listMouseMotionListener
```
    This protected field is implementation specific. Do not access directly or override. Use the create method instead
    
    See Also:
    
    createListMouseMotionListener()
  - propertyChangeListener
```
protected PropertyChangeListener propertyChangeListener
```
    This protected field is implementation specific. Do not access directly or override. Use the create method instead
    
    See Also:
    
    createPropertyChangeListener()
  - listDataListener
```
protected ListDataListener listDataListener
```
    This protected field is implementation specific. Do not access directly or override. Use the create method instead
    
    See Also:
    
    createListDataListener()
  - itemListener
```
protected ItemListener itemListener
```
    This protected field is implementation specific. Do not access directly or override. Use the create method instead
    
    See Also:
    
    createItemListener()
  - autoscrollTimer
```
protected Timer autoscrollTimer
```
    This protected field is implementation specific. Do not access directly or override.
  - hasEntered
```
protected boolean hasEntered
```
  - isAutoScrolling
```
protected boolean isAutoScrolling
```
  - scrollDirection
```
protected int scrollDirection
```
  - SCROLL_UP
```
protected static final int SCROLL_UP
```
    See Also:
    
    Constant Field Values
  - SCROLL_DOWN
```
protected static final int SCROLL_DOWN
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - BasicComboPopup
```
public BasicComboPopup(JComboBox combo)
```
- Method Detail
  - show
```
public void show()
```
    Implementation of ComboPopup.show().
  - hide
```
public void hide()
```
    Implementation of ComboPopup.hide().
  - getList
```
public JList getList()
```
    Implementation of ComboPopup.getList().
  - getMouseListener
```
public MouseListener getMouseListener()
```
    Implementation of ComboPopup.getMouseListener().
    
    Specified by:
    
    getMouseListener in interface ComboPopup
    
    Returns:
    
    a MouseListener or null
    
    See Also:
    
    ComboPopup.getMouseListener()
  - getMouseMotionListener
```
public MouseMotionListener getMouseMotionListener()
```
    Implementation of ComboPopup.getMouseMotionListener().
    
    Specified by:
    
    getMouseMotionListener in interface ComboPopup
    
    Returns:
    
    a MouseMotionListener or null
    
    See Also:
    
    ComboPopup.getMouseMotionListener()
  - getKeyListener
```
public KeyListener getKeyListener()
```
    Implementation of ComboPopup.getKeyListener().
    
    Specified by:
    
    getKeyListener in interface ComboPopup
    
    Returns:
    
    a KeyListener or null
    
    See Also:
    
    ComboPopup.getKeyListener()
  - uninstallingUI
```
public void uninstallingUI()
```
    Called when the UI is uninstalling. Since this popup isn't in the component tree, it won't get it's uninstallUI() called. It removes the listeners that were added in addComboBoxListeners().
  - uninstallComboBoxModelListeners
```
protected void uninstallComboBoxModelListeners(ComboBoxModel model)
```
    Removes the listeners from the combo box model
    
    Parameters:
    
    model - The combo box model to install listeners
    
    See Also:
    
    installComboBoxModelListeners(javax.swing.ComboBoxModel)
  - uninstallKeyboardActions
```
protected void uninstallKeyboardActions()
```
  - firePopupMenuWillBecomeVisible
```
protected void firePopupMenuWillBecomeVisible()
```
    Description copied from class: JPopupMenu
    
    Notifies PopupMenuListeners that this popup menu will become visible.
  - firePopupMenuWillBecomeInvisible
```
protected void firePopupMenuWillBecomeInvisible()
```
    Description copied from class: JPopupMenu
    
    Notifies PopupMenuListeners that this popup menu will become invisible.
  - firePopupMenuCanceled
```
protected void firePopupMenuCanceled()
```
    Description copied from class: JPopupMenu
    
    Notifies PopupMenuListeners that this popup menu is cancelled.
  - createMouseListener
```
protected MouseListener createMouseListener()
```
    Creates a listener that will watch for mouse-press and release events on the combo box. Warning: When overriding this method, make sure to maintain the existing behavior.
    
    Returns:
    
    a MouseListener which will be added to the combo box or null
  - createMouseMotionListener
```
protected MouseMotionListener createMouseMotionListener()
```
    Creates the mouse motion listener which will be added to the combo box. Warning: When overriding this method, make sure to maintain the existing behavior.
    
    Returns:
    
    a MouseMotionListener which will be added to the combo box or null
  - createKeyListener
```
protected KeyListener createKeyListener()
```
    Creates the key listener that will be added to the combo box. If this method returns null then it will not be added to the combo box.
    
    Returns:
    
    a KeyListener or null
  - createListSelectionListener
```
protected ListSelectionListener createListSelectionListener()
```
    Creates a list selection listener that watches for selection changes in the popup's list. If this method returns null then it will not be added to the popup list.
    
    Returns:
    
    an instance of a ListSelectionListener or null
  - createListDataListener
```
protected ListDataListener createListDataListener()
```
    Creates a list data listener which will be added to the ComboBoxModel. If this method returns null then it will not be added to the combo box model.
    
    Returns:
    
    an instance of a ListDataListener or null
  - createListMouseListener
```
protected MouseListener createListMouseListener()
```
    Creates a mouse listener that watches for mouse events in the popup's list. If this method returns null then it will not be added to the combo box.
    
    Returns:
    
    an instance of a MouseListener or null
  - createListMouseMotionListener
```
protected MouseMotionListener createListMouseMotionListener()
```
    Creates a mouse motion listener that watches for mouse motion events in the popup's list. If this method returns null then it will not be added to the combo box.
    
    Returns:
    
    an instance of a MouseMotionListener or null
  - createPropertyChangeListener
```
protected PropertyChangeListener createPropertyChangeListener()
```
    Creates a PropertyChangeListener which will be added to the combo box. If this method returns null then it will not be added to the combo box.
    
    Returns:
    
    an instance of a PropertyChangeListener or null
  - createItemListener
```
protected ItemListener createItemListener()
```
    Creates an ItemListener which will be added to the combo box. If this method returns null then it will not be added to the combo box.
    Subclasses may override this method to return instances of their own ItemEvent handlers.
    
    Returns:
    
    an instance of an ItemListener or null
  - createList
```
protected JList createList()
```
    Creates the JList used in the popup to display the items in the combo box model. This method is called when the UI class is created.
    
    Returns:
    
    a JList used to display the combo box items
  - configureList
```
protected void configureList()
```
    Configures the list which is used to hold the combo box items in the popup. This method is called when the UI class is created.
    
    See Also:
    
    createList()
  - installListListeners
```
protected void installListListeners()
```
    Adds the listeners to the list control.
  - createScroller
```
protected JScrollPane createScroller()
```
    Creates the scroll pane which houses the scrollable list.
  - configureScroller
```
protected void configureScroller()
```
    Configures the scrollable portion which holds the list within the combo box popup. This method is called when the UI class is created.
  - configurePopup
```
protected void configurePopup()
```
    Configures the popup portion of the combo box. This method is called when the UI class is created.
  - installComboBoxListeners
```
protected void installComboBoxListeners()
```
    This method adds the necessary listeners to the JComboBox.
  - installComboBoxModelListeners
```
protected void installComboBoxModelListeners(ComboBoxModel model)
```
    Installs the listeners on the combo box model. Any listeners installed on the combo box model should be removed in uninstallComboBoxModelListeners.
    
    Parameters:
    
    model - The combo box model to install listeners
    
    See Also:
    
    uninstallComboBoxModelListeners(javax.swing.ComboBoxModel)
  - installKeyboardActions
```
protected void installKeyboardActions()
```
  - isFocusTraversable
```
public boolean isFocusTraversable()
```
    Overridden to unconditionally return false.
    
    Overrides:
    
    isFocusTraversable in class Component
    
    Returns:
    
    true if this Component is focusable; false otherwise
    
    See Also:
    
    Component.setFocusable(boolean)
  - startAutoScrolling
```
protected void startAutoScrolling(int direction)
```
    This protected method is implementation specific and should be private. do not call or override.
  - stopAutoScrolling
```
protected void stopAutoScrolling()
```
    This protected method is implementation specific and should be private. do not call or override.
  - autoScrollUp
```
protected void autoScrollUp()
```
    This protected method is implementation specific and should be private. do not call or override.
  - autoScrollDown
```
protected void autoScrollDown()
```
    This protected method is implementation specific and should be private. do not call or override.
  - getAccessibleContext
```
public AccessibleContext getAccessibleContext()
```
    Gets the AccessibleContext associated with this BasicComboPopup. The AccessibleContext will have its parent set to the ComboBox.
    
    Specified by:
    
    getAccessibleContext in interface Accessible
    
    Overrides:
    
    getAccessibleContext in class JPopupMenu
    
    Returns:
    
    an AccessibleContext for the BasicComboPopup
    
    Since:
    
    1.5
  - delegateFocus
```
protected void delegateFocus(MouseEvent e)
```
    This is is a utility method that helps event handlers figure out where to send the focus when the popup is brought up. The standard implementation delegates the focus to the editor (if the combo box is editable) or to the JComboBox if it is not editable.
  - togglePopup
```
protected void togglePopup()
```
    Makes the popup visible if it is hidden and makes it hidden if it is visible.
  - convertMouseEvent
```
protected MouseEvent convertMouseEvent(MouseEvent e)
```
  - getPopupHeightForRowCount
```
protected int getPopupHeightForRowCount(int maxRowCount)
```
    Retrieves the height of the popup based on the current ListCellRenderer and the maximum row count.
  - computePopupBounds
```
protected Rectangle computePopupBounds(int px,
                                       int py,
                                       int pw,
                                       int ph)
```
    Calculate the placement and size of the popup portion of the combo box based on the combo box location and the enclosing screen bounds. If no transformations are required, then the returned rectangle will have the same values as the parameters.
    
    Parameters:
    
    px - starting x location
    
    py - starting y location
    
    pw - starting width
    
    ph - starting height
    
    Returns:
    
    a rectangle which represents the placement and size of the popup
  - updateListBoxSelectionForEvent
```
protected void updateListBoxSelectionForEvent(MouseEvent anEvent,
                                              boolean shouldScroll)
```
    A utility method used by the event listeners. Given a mouse event, it changes the list selection to the list item below the mouse.

Class BasicComboPopup

Nested Class Summary

Nested Classes

Nested classes/interfaces inherited from class javax.swing.JPopupMenu

Nested classes/interfaces inherited from class javax.swing.JComponent

Nested classes/interfaces inherited from class java.awt.Container

Nested classes/interfaces inherited from class java.awt.Component

Field Summary

Fields

Fields inherited from class javax.swing.JComponent

Fields inherited from class java.awt.Component

Fields inherited from interface java.awt.image.ImageObserver

Constructor Summary

Constructors

Method Summary

Methods inherited from class javax.swing.JPopupMenu

Methods inherited from class javax.swing.JComponent

Methods inherited from class java.awt.Container

Methods inherited from class java.awt.Component

Methods inherited from class java.lang.Object

Methods inherited from interface javax.swing.plaf.basic.ComboPopup

Field Detail

comboBox

list

scroller

valueIsAdjusting

mouseMotionListener

mouseListener

keyListener

listSelectionListener

listMouseListener

listMouseMotionListener

propertyChangeListener

listDataListener

itemListener

autoscrollTimer

hasEntered

isAutoScrolling

scrollDirection

SCROLL_UP

SCROLL_DOWN

Constructor Detail

BasicComboPopup

Method Detail

show

hide

getList

getMouseListener

getMouseMotionListener

getKeyListener

uninstallingUI

uninstallComboBoxModelListeners

uninstallKeyboardActions

firePopupMenuWillBecomeVisible

firePopupMenuWillBecomeInvisible

firePopupMenuCanceled

createMouseListener

createMouseMotionListener

createKeyListener

createListSelectionListener

createListDataListener

createListMouseListener

createListMouseMotionListener

createPropertyChangeListener

createItemListener

createList

configureList

installListListeners

createScroller

configureScroller

configurePopup

installComboBoxListeners

installComboBoxModelListeners

installKeyboardActions

isFocusTraversable

startAutoScrolling

stopAutoScrolling

autoScrollUp

autoScrollDown

getAccessibleContext