javax.swing.plaf.basic

Class BasicComboPopup

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPopupMenu

javax.swing.plaf.basic.BasicComboPopup

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible, javax.swing.MenuElement, ComboPopup

public class BasicComboPopup
extends javax.swing.JPopupMenu
implements ComboPopup

UI Delegate for ComboPopup

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
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

javax.swing.JPopupMenu.AccessibleJPopupMenu, javax.swing.JPopupMenu.Separator

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

javax.swing.JComponent.AccessibleJComponent

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

java.awt.Container.AccessibleAWTContainer

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

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field and Description
protected javax.swing.Timer	autoscrollTimer
protected javax.swing.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 java.awt.event.ItemListener	itemListener ItemListener listening to the selection changes in the combo box
protected java.awt.event.KeyListener	keyListener This listener is not used
protected javax.swing.JList	list JList which is used to display item is the combo box
protected javax.swing.event.ListDataListener	listDataListener This listener is not used
protected java.awt.event.MouseListener	listMouseListener MouseListener listening to mouse events occuring in the combo box's list.
protected java.awt.event.MouseMotionListener	listMouseMotionListener MouseMotionListener listening to mouse motion events occuring in the combo box's list
protected javax.swing.event.ListSelectionListener	listSelectionListener This listener is not used
protected java.awt.event.MouseListener	mouseListener MouseListener listening to mouse events occuring in the combo box
protected java.awt.event.MouseMotionListener	mouseMotionListener MouseMotionListener listening to mouse motion events occuring in the combo box
protected java.beans.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 javax.swing.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

Constructors

Constructor and Description
BasicComboPopup(javax.swing.JComboBox comboBox) Creates a new BasicComboPopup object.

Method Summary

Methods

Modifier and Type	Method and Description
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 java.awt.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 java.awt.event.MouseEvent	convertMouseEvent(java.awt.event.MouseEvent e) DOCUMENT ME!
protected java.awt.event.ItemListener	createItemListener() Creates new ItemListener that will listen to ItemEvents occuring in the combo box.
protected java.awt.event.KeyListener	createKeyListener() KeyListener created in this method is not used anymore.
protected javax.swing.JList	createList() Creates JList that will be used to display items in the combo box.
protected javax.swing.event.ListDataListener	createListDataListener() Creates ListDataListener.
protected java.awt.event.MouseListener	createListMouseListener() This method creates ListMouseListener to listen to mouse events occuring in the combo box's item list.
protected java.awt.event.MouseMotionListener	createListMouseMotionListener() Creates ListMouseMotionlistener to listen to mouse motion events occuring in the combo box's list.
protected javax.swing.event.ListSelectionListener	createListSelectionListener() ListSelectionListener created in this method is not used anymore
protected java.awt.event.MouseListener	createMouseListener() Creates MouseListener to listen to mouse events occuring in the combo box.
protected java.awt.event.MouseMotionListener	createMouseMotionListener() Create Mouse listener that listens to mouse dragging events occuring in the combo box.
protected java.beans.PropertyChangeListener	createPropertyChangeListener() Creates PropertyChangeListener to handle changes in the JComboBox's bound properties.
protected javax.swing.JScrollPane	createScroller() This method creates scroll pane that will contain the list of comboBox's items inside of it.
protected void	delegateFocus(java.awt.event.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
java.awt.event.KeyListener	getKeyListener() Returns KeyListener listening to key events occuring in the combo box.
javax.swing.JList	getList() Return list cointaining JComboBox's items
java.awt.event.MouseListener	getMouseListener() Returns MouseListener that is listening to mouse events occuring in the combo box.
java.awt.event.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(javax.swing.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(javax.swing.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(java.awt.event.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 javax.swing.Timer autoscrollTimer

comboBox

protected javax.swing.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 java.awt.event.ItemListener itemListener

ItemListener listening to the selection changes in the combo box

keyListener

protected java.awt.event.KeyListener keyListener

This listener is not used

list

protected javax.swing.JList list

JList which is used to display item is the combo box

listDataListener

protected javax.swing.event.ListDataListener listDataListener

This listener is not used

listMouseListener

protected java.awt.event.MouseListener listMouseListener

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

listMouseMotionListener

protected java.awt.event.MouseMotionListener listMouseMotionListener

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

listSelectionListener

protected javax.swing.event.ListSelectionListener listSelectionListener

This listener is not used

mouseListener

protected java.awt.event.MouseListener mouseListener

MouseListener listening to mouse events occuring in the combo box

mouseMotionListener

protected java.awt.event.MouseMotionListener mouseMotionListener

MouseMotionListener listening to mouse motion events occuring in the combo box

propertyChangeListener

protected java.beans.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 javax.swing.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(javax.swing.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 java.awt.Component

hide

public void hide()

This method hides drop down list of items

Specified by:

hide in interface ComboPopup

Overrides:

hide in class java.awt.Component

getList

public javax.swing.JList getList()

Return list cointaining JComboBox's items

Specified by:

getList in interface ComboPopup

Returns:

list cointaining JComboBox's items

getMouseListener

public java.awt.event.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 java.awt.event.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 java.awt.event.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(javax.swing.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 javax.swing.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 javax.swing.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 javax.swing.JPopupMenu

createMouseListener

protected java.awt.event.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 java.awt.event.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 java.awt.event.KeyListener createKeyListener()

KeyListener created in this method is not used anymore.

Returns:

KeyListener that does nothing

createListSelectionListener

protected javax.swing.event.ListSelectionListener createListSelectionListener()

ListSelectionListener created in this method is not used anymore

Returns:

ListSelectionListener that does nothing

createListDataListener

protected javax.swing.event.ListDataListener createListDataListener()

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

Returns:

null

createListMouseListener

protected java.awt.event.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 java.awt.event.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 java.beans.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 java.awt.event.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 javax.swing.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 javax.swing.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(javax.swing.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 java.awt.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(java.awt.event.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 java.awt.event.MouseEvent convertMouseEvent(java.awt.event.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 java.awt.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(java.awt.event.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!