javax.swing.plaf.basic
Class BasicComboPopup

java.lang.Object
  extended by java.awt.Component
      extended by java.awt.Container
          extended by javax.swing.JComponent
              extended by javax.swing.JPopupMenu
                  extended by 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

UI Delegate for ComboPopup

See Also:
Serialized Form

Nested Class Summary
 class BasicComboPopup.InvocationKeyHandler
          This class is not used anymore
protected  class BasicComboPopup.InvocationMouseHandler
          InvocationMouseHandler is a listener that listens to mouse events occuring in the combo box.
protected  class BasicComboPopup.InvocationMouseMotionHandler
          InvocationMouseMotionListener is a mouse listener that listens to mouse dragging events occuring in the combo box.
protected  class BasicComboPopup.ItemHandler
          ItemHandler is an item listener that listens to selection events occuring in the combo box.
 class BasicComboPopup.ListDataHandler
          This class is not used any more.
protected  class BasicComboPopup.ListMouseHandler
          ListMouseHandler is a listener that listens to mouse events occuring in the combo box's list of items.
protected  class BasicComboPopup.ListMouseMotionHandler
          ListMouseMotionHandler listens to mouse motion events occuring in the combo box's list.
protected  class BasicComboPopup.ListSelectionHandler
          This class is not used anymore
protected  class BasicComboPopup.PropertyChangeHandler
          This class listens to changes occuring in the bound properties of 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.BltBufferStrategy, Component.FlipBufferStrategy
 
Field Summary
protected  Timer autoscrollTimer
           
protected  JComboBox comboBox
          ComboBox associated with this popup
protected  boolean hasEntered
          FIXME: Need to document
protected  boolean isAutoScrolling
          Indicates whether the scroll bar located in popup menu with comboBox's list of items is currently autoscrolling.
protected  ItemListener itemListener
          ItemListener listening to the selection changes in the combo box
protected  KeyListener keyListener
          This listener is not used
protected  JList list
          JList which is used to display item is the combo box
protected  ListDataListener listDataListener
          This listener is not used
protected  MouseListener listMouseListener
          MouseListener listening to mouse events occuring in the combo box's list.
protected  MouseMotionListener listMouseMotionListener
          MouseMotionListener listening to mouse motion events occuring in the combo box's list
protected  ListSelectionListener listSelectionListener
          This listener is not used
protected  MouseListener mouseListener
          MouseListener listening to mouse events occuring in the combo box
protected  MouseMotionListener mouseMotionListener
          MouseMotionListener listening to mouse motion events occuring in the combo box
protected  PropertyChangeListener propertyChangeListener
          PropertyChangeListener listening to changes occuring in the bound properties of the combo box
protected static int SCROLL_DOWN
          direction for scrolling down list of combo box's items
protected static int SCROLL_UP
          direction for scrolling up list of combo box's items
protected  int scrollDirection
          Indicates auto scrolling direction
protected  JScrollPane scroller
          JScrollPane that contains list portion of the combo box
protected  boolean valueIsAdjusting
          This field is not used
 
Fields inherited from class javax.swing.JPopupMenu
selectionModel
 
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
BasicComboPopup(JComboBox comboBox)
          Creates a new BasicComboPopup object.
 
Method Summary
protected  void autoScrollDown()
          This method scrolls down list of combo box's and highlights item in the list that just became visible.
protected  void autoScrollUp()
          This method scrolls up list of combo box's items up and highlights that just became visible.
protected  Rectangle computePopupBounds(int px, int py, int pw, int ph)
          DOCUMENT ME!
protected  void configureList()
          This method configures the list of comboBox's items by setting default properties and installing listeners.
protected  void configurePopup()
          This method configures popup menu that will be used to display Scrollpane with list of items inside of it.
protected  void configureScroller()
          This method configures scroll pane to contain list of comboBox's items
protected  MouseEvent convertMouseEvent(MouseEvent e)
          DOCUMENT ME!
protected  ItemListener createItemListener()
          Creates new ItemListener that will listen to ItemEvents occuring in the combo box.
protected  KeyListener createKeyListener()
          KeyListener created in this method is not used anymore.
protected  JList createList()
          Creates JList that will be used to display items in the combo box.
protected  ListDataListener createListDataListener()
          Creates ListDataListener.
protected  MouseListener createListMouseListener()
          This method creates ListMouseListener to listen to mouse events occuring in the combo box's item list.
protected  MouseMotionListener createListMouseMotionListener()
          Creates ListMouseMotionlistener to listen to mouse motion events occuring in the combo box's list.
protected  ListSelectionListener createListSelectionListener()
          ListSelectionListener created in this method is not used anymore
protected  MouseListener createMouseListener()
          Creates MouseListener to listen to mouse events occuring in the combo box.
protected  MouseMotionListener createMouseMotionListener()
          Create Mouse listener that listens to mouse dragging events occuring in the combo box.
protected  PropertyChangeListener createPropertyChangeListener()
          Creates PropertyChangeListener to handle changes in the JComboBox's bound properties.
protected  JScrollPane createScroller()
          This method creates scroll pane that will contain the list of comboBox's items inside of it.
protected  void delegateFocus(MouseEvent e)
          This method helps to delegate focus to the right component in the JComboBox.
protected  void firePopupMenuCanceled()
          This method fires PopupMenuEvent indicating that combo box's popup list of items was closed without selection.
protected  void firePopupMenuWillBecomeInvisible()
          This method fires PopupMenuEvent indicating that combo box's popup list of items will become invisible.
protected  void firePopupMenuWillBecomeVisible()
          This method fires PopupMenuEvent indicating that combo box's popup list of items will become visible
 KeyListener getKeyListener()
          Returns KeyListener listening to key events occuring in the combo box.
 JList getList()
          Return list cointaining JComboBox's items
 MouseListener getMouseListener()
          Returns MouseListener that is listening to mouse events occuring in the combo box.
 MouseMotionListener getMouseMotionListener()
          Returns MouseMotionListener that is listening to mouse motion events occuring in the combo box.
protected  int getPopupHeightForRowCount(int maxRowCount)
          Returns required height of the popup such that number of items visible in it are equal to the maximum row count.
 void hide()
          This method hides drop down list of items
protected  void installComboBoxListeners()
           
protected  void installComboBoxModelListeners(ComboBoxModel model)
          This method installs listeners that will listen to changes occuring in the comb box's data model
protected  void installKeyboardActions()
          Installs the keyboard actions.
protected  void installListListeners()
          This method installs list listeners.
 boolean isFocusTraversable()
          This method always returns false to indicate that items in the combo box list are not focus traversable.
 void show()
          This method displays drow down list of combo box items on the screen.
protected  void startAutoScrolling(int direction)
          This method start scrolling combo box's list of items either up or down depending on the specified 'direction'
protected  void stopAutoScrolling()
          This method stops scrolling the combo box's list of items
protected  void togglePopup()
          This method displays combo box popup if the popup is not currently shown on the screen and hides it if it is currently visible
protected  void uninstallComboBoxModelListeners(ComboBoxModel model)
          This method uninstalls listeners that were listening to changes occuring in the comb box's data model
 void uninstallingUI()
          This method uninstalls the UI for the given JComponent.
protected  void uninstallKeyboardActions()
          This method uninstalls keyboard actions installed by the UI.
protected  void updateListBoxSelectionForEvent(MouseEvent anEvent, boolean shouldScroll)
          This method changes the selection in the list to the item over which the mouse is currently located.
 
Methods inherited from class javax.swing.JPopupMenu
add, add, add, addMenuKeyListener, addPopupMenuListener, addSeparator, createActionChangeListener, createActionComponent, getAccessibleContext, getComponent, getComponentAtIndex, getComponentIndex, getDefaultLightWeightPopupEnabled, getInvoker, getLabel, getMargin, getMenuKeyListeners, getPopupMenuListeners, getSelectionModel, getSubElements, getUI, getUIClassID, insert, insert, isBorderPainted, isLightWeightPopupEnabled, isPopupTrigger, isVisible, menuSelectionChanged, pack, paramString, 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, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, 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, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setNextFocusableComponent, setOpaque, 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, setFocusTraversalKeys, 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, firePropertyChange, 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, 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, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, 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, setMaximumSize, setMinimumSize, setName, setPreferredSize, 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

autoscrollTimer

protected Timer autoscrollTimer

comboBox

protected JComboBox comboBox
ComboBox associated with this popup


hasEntered

protected boolean hasEntered
FIXME: Need to document


isAutoScrolling

protected boolean isAutoScrolling
Indicates whether the scroll bar located in popup menu with comboBox's list of items is currently autoscrolling. This happens when mouse event originated in the combo box and is dragged outside of its bounds


itemListener

protected ItemListener itemListener
ItemListener listening to the selection changes in the combo box


keyListener

protected KeyListener keyListener
This listener is not used


list

protected JList list
JList which is used to display item is the combo box


listDataListener

protected ListDataListener listDataListener
This listener is not used


listMouseListener

protected MouseListener listMouseListener
MouseListener listening to mouse events occuring in the combo box's list.


listMouseMotionListener

protected MouseMotionListener listMouseMotionListener
MouseMotionListener listening to mouse motion events occuring in the combo box's list


listSelectionListener

protected ListSelectionListener listSelectionListener
This listener is not used


mouseListener

protected MouseListener mouseListener
MouseListener listening to mouse events occuring in the combo box


mouseMotionListener

protected MouseMotionListener mouseMotionListener
MouseMotionListener listening to mouse motion events occuring in the combo box


propertyChangeListener

protected PropertyChangeListener propertyChangeListener
PropertyChangeListener listening to changes occuring in the bound properties of the combo box


SCROLL_DOWN

protected static final int SCROLL_DOWN
direction for scrolling down list of combo box's items

See Also:
Constant Field Values

SCROLL_UP

protected static final int SCROLL_UP
direction for scrolling up list of combo box's items

See Also:
Constant Field Values

scrollDirection

protected int scrollDirection
Indicates auto scrolling direction


scroller

protected JScrollPane scroller
JScrollPane that contains list portion of the combo box


valueIsAdjusting

protected boolean valueIsAdjusting
This field is not used

Constructor Detail

BasicComboPopup

public BasicComboPopup(JComboBox comboBox)
Creates a new BasicComboPopup object.

Parameters:
comboBox - the combo box with which this popup should be associated
Method Detail

show

public void show()
This method displays drow down list of combo box items on the screen.

Specified by:
show in interface ComboPopup
Overrides:
show in class Component

hide

public void hide()
This method hides drop down list of items

Specified by:
hide in interface ComboPopup
Overrides:
hide in class Component

getList

public JList getList()
Return list cointaining JComboBox's items

Specified by:
getList in interface ComboPopup
Returns:
list cointaining JComboBox's items

getMouseListener

public MouseListener getMouseListener()
Returns MouseListener that is listening to mouse events occuring in the combo box.

Specified by:
getMouseListener in interface ComboPopup
Returns:
MouseListener

getMouseMotionListener

public MouseMotionListener getMouseMotionListener()
Returns MouseMotionListener that is listening to mouse motion events occuring in the combo box.

Specified by:
getMouseMotionListener in interface ComboPopup
Returns:
MouseMotionListener

getKeyListener

public KeyListener getKeyListener()
Returns KeyListener listening to key events occuring in the combo box. This method returns null because KeyHandler is not longer used.

Specified by:
getKeyListener in interface ComboPopup
Returns:
KeyListener

uninstallingUI

public void uninstallingUI()
This method uninstalls the UI for the given JComponent.

Specified by:
uninstallingUI in interface ComboPopup

uninstallComboBoxModelListeners

protected void uninstallComboBoxModelListeners(ComboBoxModel model)
This method uninstalls listeners that were listening to changes occuring in the comb box's data model

Parameters:
model - data model for the combo box from which to uninstall listeners

uninstallKeyboardActions

protected void uninstallKeyboardActions()
This method uninstalls keyboard actions installed by the UI.


firePopupMenuWillBecomeVisible

protected void firePopupMenuWillBecomeVisible()
This method fires PopupMenuEvent indicating that combo box's popup list of items will become visible

Overrides:
firePopupMenuWillBecomeVisible in class JPopupMenu

firePopupMenuWillBecomeInvisible

protected void firePopupMenuWillBecomeInvisible()
This method fires PopupMenuEvent indicating that combo box's popup list of items will become invisible.

Overrides:
firePopupMenuWillBecomeInvisible in class JPopupMenu

firePopupMenuCanceled

protected void firePopupMenuCanceled()
This method fires PopupMenuEvent indicating that combo box's popup list of items was closed without selection.

Overrides:
firePopupMenuCanceled in class JPopupMenu

createMouseListener

protected MouseListener createMouseListener()
Creates MouseListener to listen to mouse events occuring in the combo box. Note that this listener doesn't listen to mouse events occuring in the popup portion of the combo box, it only listens to main combo box part.

Returns:
new MouseMotionListener that listens to mouse events occuring in the combo box

createMouseMotionListener

protected MouseMotionListener createMouseMotionListener()
Create Mouse listener that listens to mouse dragging events occuring in the combo box. This listener is responsible for changing the selection in the combo box list to the component over which mouse is being currently dragged

Returns:
new MouseMotionListener that listens to mouse dragging events occuring in the combo box

createKeyListener

protected KeyListener createKeyListener()
KeyListener created in this method is not used anymore.

Returns:
KeyListener that does nothing

createListSelectionListener

protected ListSelectionListener createListSelectionListener()
ListSelectionListener created in this method is not used anymore

Returns:
ListSelectionListener that does nothing

createListDataListener

protected ListDataListener createListDataListener()
Creates ListDataListener. This method returns null, because ListDataHandler class is obsolete and is no longer used.

Returns:
null

createListMouseListener

protected MouseListener createListMouseListener()
This method creates ListMouseListener to listen to mouse events occuring in the combo box's item list.

Returns:
MouseListener to listen to mouse events occuring in the combo box's items list.

createListMouseMotionListener

protected MouseMotionListener createListMouseMotionListener()
Creates ListMouseMotionlistener to listen to mouse motion events occuring in the combo box's list. This listener is responsible for highlighting items in the list when mouse is moved over them.

Returns:
MouseMotionListener that handles mouse motion events occuring in the list of the combo box.

createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener()
Creates PropertyChangeListener to handle changes in the JComboBox's bound properties.

Returns:
PropertyChangeListener to handle changes in the JComboBox's bound properties.

createItemListener

protected ItemListener createItemListener()
Creates new ItemListener that will listen to ItemEvents occuring in the combo box.

Returns:
ItemListener to listen to ItemEvents occuring in the combo box.

createList

protected JList createList()
Creates JList that will be used to display items in the combo box.

Returns:
JList that will be used to display items in the combo box.

configureList

protected void configureList()
This method configures the list of comboBox's items by setting default properties and installing listeners.


installListListeners

protected void installListListeners()
This method installs list listeners.


createScroller

protected JScrollPane createScroller()
This method creates scroll pane that will contain the list of comboBox's items inside of it.

Returns:
JScrollPane

configureScroller

protected void configureScroller()
This method configures scroll pane to contain list of comboBox's items


configurePopup

protected void configurePopup()
This method configures popup menu that will be used to display Scrollpane with list of items inside of it.


installComboBoxListeners

protected void installComboBoxListeners()

installComboBoxModelListeners

protected void installComboBoxModelListeners(ComboBoxModel model)
This method installs listeners that will listen to changes occuring in the comb box's data model

Parameters:
model - data model for the combo box for which to install listeners

installKeyboardActions

protected void installKeyboardActions()
Installs the keyboard actions.


isFocusTraversable

public boolean isFocusTraversable()
This method always returns false to indicate that items in the combo box list are not focus traversable.

Overrides:
isFocusTraversable in class Component
Returns:
false
See Also:
Component.setFocusable(boolean)

startAutoScrolling

protected void startAutoScrolling(int direction)
This method start scrolling combo box's list of items either up or down depending on the specified 'direction'

Parameters:
direction - of the scrolling.

stopAutoScrolling

protected void stopAutoScrolling()
This method stops scrolling the combo box's list of items


autoScrollUp

protected void autoScrollUp()
This method scrolls up list of combo box's items up and highlights that just became visible.


autoScrollDown

protected void autoScrollDown()
This method scrolls down list of combo box's and highlights item in the list that just became visible.


delegateFocus

protected void delegateFocus(MouseEvent e)
This method helps to delegate focus to the right component in the JComboBox. If the comboBox is editable then focus is sent to ComboBoxEditor, otherwise it is delegated to JComboBox.

Parameters:
e - MouseEvent

togglePopup

protected void togglePopup()
This method displays combo box popup if the popup is not currently shown on the screen and hides it if it is currently visible


convertMouseEvent

protected MouseEvent convertMouseEvent(MouseEvent e)
DOCUMENT ME!

Parameters:
e - DOCUMENT ME!
Returns:
DOCUMENT ME!

getPopupHeightForRowCount

protected int getPopupHeightForRowCount(int maxRowCount)
Returns required height of the popup such that number of items visible in it are equal to the maximum row count. By default comboBox.maximumRowCount=8

Parameters:
maxRowCount - number of maximum visible rows in the combo box's popup list of items
Returns:
height of the popup required to fit number of items equal to JComboBox.maximumRowCount.

computePopupBounds

protected Rectangle computePopupBounds(int px,
                                       int py,
                                       int pw,
                                       int ph)
DOCUMENT ME!

Parameters:
px - DOCUMENT ME!
py - DOCUMENT ME!
pw - DOCUMENT ME!
ph - DOCUMENT ME!
Returns:
DOCUMENT ME!

updateListBoxSelectionForEvent

protected void updateListBoxSelectionForEvent(MouseEvent anEvent,
                                              boolean shouldScroll)
This method changes the selection in the list to the item over which the mouse is currently located.

Parameters:
anEvent - MouseEvent
shouldScroll - DOCUMENT ME!