javax.swing

Class JList.AccessibleJList.AccessibleJListChild

java.lang.Object

javax.accessibility.AccessibleContext

javax.swing.JList.AccessibleJList.AccessibleJListChild

All Implemented Interfaces:

Accessible, AccessibleComponent

Enclosing class:

JList.AccessibleJList

protected class JList.AccessibleJList.AccessibleJListChild
extends AccessibleContext
implements Accessible, AccessibleComponent

Provides accessibility support for list elements in JLists.

Field Summary

Fields inherited from class javax.accessibility.AccessibleContext

ACCESSIBLE_ACTION_PROPERTY, ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY, ACCESSIBLE_CARET_PROPERTY, ACCESSIBLE_CHILD_PROPERTY, ACCESSIBLE_COMPONENT_BOUNDS_CHANGED, ACCESSIBLE_DESCRIPTION_PROPERTY, ACCESSIBLE_HYPERTEXT_OFFSET, ACCESSIBLE_INVALIDATE_CHILDREN, ACCESSIBLE_NAME_PROPERTY, ACCESSIBLE_SELECTION_PROPERTY, ACCESSIBLE_STATE_PROPERTY, ACCESSIBLE_TABLE_CAPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_HEADER_CHANGED, ACCESSIBLE_TABLE_MODEL_CHANGED, ACCESSIBLE_TABLE_ROW_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_ROW_HEADER_CHANGED, ACCESSIBLE_TABLE_SUMMARY_CHANGED, ACCESSIBLE_TEXT_ATTRIBUTES_CHANGED, ACCESSIBLE_TEXT_PROPERTY, ACCESSIBLE_VALUE_PROPERTY, ACCESSIBLE_VISIBLE_DATA_PROPERTY, accessibleDescription, accessibleName, accessibleParent

Constructor Summary

Constructors

Constructor and Description
JList.AccessibleJList.AccessibleJListChild(JList list, int index) Creates a new instance of AccessibleJListChild.

Method Summary

Methods

Modifier and Type	Method and Description
void	addFocusListener(FocusListener listener) Adds a focus listener to the parent list.
void	addPropertyChangeListener(PropertyChangeListener l) This method does nothing, list children are transient accessible objects which means that they don't fire property change events.
boolean	contains(Point point) Returns true if this list child covers the screen location point (relative to the JList coordinate system, false otherwise.
Accessible	getAccessibleAt(Point point) Returns null because list children do not have children themselves
Accessible	getAccessibleChild(int i) Returns null since list children don't have children themselves.
int	getAccessibleChildrenCount() Returns 0 since list children don't have children themselves.
AccessibleContext	getAccessibleContext() Returns the accessible context of this object.
int	getAccessibleIndexInParent() Returns the index of this list child within it's parent list.
AccessibleRole	getAccessibleRole() Returns the accessible role of this list item, which is AccessibleRole.LABEL.
AccessibleStateSet	getAccessibleStateSet() Returns the accessible state set of this list item.
Color	getBackground() Returns the background color for this list child.
Rectangle	getBounds() Returns the bounds of this list child.
Cursor	getCursor() Returns the cursor for this list child.
Font	getFont() Returns the font of the JList since it is not possible to set fonts for list children individually.
FontMetrics	getFontMetrics(Font font) Returns the font metrics for the specified font.
Color	getForeground() Returns the foreground color for this list child.
Locale	getLocale() Returns the locale of this component.
Point	getLocation() Returns the screen location of this list child relative to it's parent.
Point	getLocationOnScreen() Returns the absolute screen location of this list child.
Dimension	getSize() Returns the size of this list child.
boolean	isEnabled() Returns true if the parent JList is enabled, false otherwise.
boolean	isFocusTraversable() Returns true since list children are focus traversable.
boolean	isShowing() Returns true if this list child is currently showing on screen and false otherwise.
boolean	isVisible() Returns true if this list child is visible, false otherwise.
void	removeFocusListener(FocusListener listener) Removes a focus listener from the parent list.
void	removePropertyChangeListener(PropertyChangeListener l) This method does nothing, list children are transient accessible objects which means that they don't fire property change events.
void	requestFocus() Requests focus on the parent list.
void	setBackground(Color color) Calling this method has no effect, since the background color cannot be set on list children individually.
void	setBounds(Rectangle rectangle) Does nothing since the bounds cannot be set on list children individually.
void	setCursor(Cursor cursor) Sets the cursor for this list child.
void	setEnabled(boolean b) Does nothing since the enabled flag cannot be set for list children individually.
void	setFont(Font font) Does nothing since it is not possible to set the font on list children individually.
void	setForeground(Color color) Calling this method has no effect, since the foreground color cannot be set on list children individually.
void	setLocation(Point point) Does nothing since the screen location cannot be set on list children explictitly.
void	setSize(Dimension dimension) Does nothing since the size cannot be set on list children individually.
void	setVisible(boolean b) The value of the visible property cannot be modified, so this method does nothing.

Methods inherited from class javax.accessibility.AccessibleContext

firePropertyChange, getAccessibleAction, getAccessibleComponent, getAccessibleDescription, getAccessibleEditableText, getAccessibleIcon, getAccessibleName, getAccessibleParent, getAccessibleRelationSet, getAccessibleSelection, getAccessibleTable, getAccessibleText, getAccessibleValue, setAccessibleDescription, setAccessibleName, setAccessibleParent

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JList.AccessibleJList.AccessibleJListChild

public JList.AccessibleJList.AccessibleJListChild(JList list,
                                          int index)

Creates a new instance of AccessibleJListChild.

Parameters:

list - the list of which this is an accessible child

index - the list index for this child

Method Detail

getAccessibleContext

public AccessibleContext getAccessibleContext()

Returns the accessible context of this object. Returns this since AccessibleJListChilds are their own accessible contexts.

Specified by:

getAccessibleContext in interface Accessible

Returns:

the accessible context of this object, this

getBackground

public Color getBackground()

Returns the background color for this list child. This returns the background of the JList itself since the background cannot be set on list children individually

Specified by:

getBackground in interface AccessibleComponent

Returns:

the background color for this list child

See Also:

AccessibleComponent.setBackground(Color)

setBackground

public void setBackground(Color color)

Calling this method has no effect, since the background color cannot be set on list children individually.

Specified by:

setBackground in interface AccessibleComponent

Parameters:

color - not used here.

See Also:

AccessibleComponent.getBackground()

getForeground

public Color getForeground()

Returns the foreground color for this list child. This returns the background of the JList itself since the foreground cannot be set on list children individually.

Specified by:

getForeground in interface AccessibleComponent

Returns:

the background color for this list child

See Also:

AccessibleComponent.setForeground(Color)

setForeground

public void setForeground(Color color)

Calling this method has no effect, since the foreground color cannot be set on list children individually.

Specified by:

setForeground in interface AccessibleComponent

Parameters:

color - not used here.

See Also:

AccessibleComponent.getForeground()

getCursor

public Cursor getCursor()

Returns the cursor for this list child.

Specified by:

getCursor in interface AccessibleComponent

Returns:

the cursor for this list child

See Also:

AccessibleComponent.setCursor(Cursor)

setCursor

public void setCursor(Cursor cursor)

Sets the cursor for this list child.

Specified by:

setCursor in interface AccessibleComponent

Parameters:

cursor - the graphical representation of the cursor to use

See Also:

AccessibleComponent.getCursor()

getFont

public Font getFont()

Returns the font of the JList since it is not possible to set fonts for list children individually.

Specified by:

getFont in interface AccessibleComponent

Returns:

the font of the JList

See Also:

AccessibleComponent.setFont(Font)

setFont

public void setFont(Font font)

Does nothing since it is not possible to set the font on list children individually.

Specified by:

setFont in interface AccessibleComponent

Parameters:

font - not used here

See Also:

AccessibleComponent.getFont()

getFontMetrics

public FontMetrics getFontMetrics(Font font)

Returns the font metrics for the specified font. This method forwards to the parent JList.

Specified by:

getFontMetrics in interface AccessibleComponent

Parameters:

font - the font for which the font metrics is queried

Returns:

the font metrics for the specified font

See Also:

AccessibleComponent.getFont()

isEnabled

public boolean isEnabled()

Returns true if the parent JList is enabled, false otherwise. The list children cannot have an enabled flag set individually.

Specified by:

isEnabled in interface AccessibleComponent

Returns:

true if the parent JList is enabled, false otherwise

See Also:

AccessibleComponent.setEnabled(boolean), AccessibleContext.getAccessibleStateSet(), AccessibleState.ENABLED

setEnabled

public void setEnabled(boolean b)

Does nothing since the enabled flag cannot be set for list children individually.

Specified by:

setEnabled in interface AccessibleComponent

Parameters:

b - not used here

See Also:

AccessibleComponent.isEnabled()

isVisible

public boolean isVisible()

Returns true if this list child is visible, false otherwise. The value of this property depends on JList.getFirstVisibleIndex() and JList.getLastVisibleIndex().

Specified by:

isVisible in interface AccessibleComponent

Returns:

true if this list child is visible, false otherwise

See Also:

AccessibleComponent.setVisible(boolean), AccessibleContext.getAccessibleStateSet(), AccessibleState.VISIBLE

setVisible

public void setVisible(boolean b)

The value of the visible property cannot be modified, so this method does nothing.

Specified by:

setVisible in interface AccessibleComponent

Parameters:

b - not used here

See Also:

AccessibleComponent.isVisible()

isShowing

public boolean isShowing()

Returns true if this list child is currently showing on screen and false otherwise. The list child is showing if it is visible and if it's parent JList is currently showing.

Specified by:

isShowing in interface AccessibleComponent

Returns:

true if this list child is currently showing on screen and false otherwise

See Also:

AccessibleComponent.isVisible(), AccessibleComponent.setVisible(boolean), AccessibleContext.getAccessibleStateSet(), AccessibleState.SHOWING

contains

public boolean contains(Point point)

Returns true if this list child covers the screen location point (relative to the JList coordinate system, false otherwise.

Specified by:

contains in interface AccessibleComponent

Parameters:

point - the Point to locate

Returns:

true if this list child covers the screen location point , false otherwise

See Also:

AccessibleComponent.getBounds()

getLocationOnScreen

public Point getLocationOnScreen()

Returns the absolute screen location of this list child.

Specified by:

getLocationOnScreen in interface AccessibleComponent

Returns:

the absolute screen location of this list child

See Also:

AccessibleComponent.getBounds(), AccessibleComponent.getLocation()

getLocation

public Point getLocation()

Returns the screen location of this list child relative to it's parent.

Specified by:

getLocation in interface AccessibleComponent

Returns:

the location of this list child relative to it's parent

See Also:

JList.indexToLocation(int)

setLocation

public void setLocation(Point point)

Does nothing since the screen location cannot be set on list children explictitly.

Specified by:

setLocation in interface AccessibleComponent

Parameters:

point - not used here

See Also:

AccessibleComponent.getLocation()

getBounds

public Rectangle getBounds()

Returns the bounds of this list child.

Specified by:

getBounds in interface AccessibleComponent

Returns:

the bounds of this list child

See Also:

JList.getCellBounds(int, int)

setBounds

public void setBounds(Rectangle rectangle)

Does nothing since the bounds cannot be set on list children individually.

Specified by:

setBounds in interface AccessibleComponent

Parameters:

rectangle - not used here

getSize

public Dimension getSize()

Returns the size of this list child.

Specified by:

getSize in interface AccessibleComponent

Returns:

the size of this list child

See Also:

AccessibleComponent.setSize(Dimension)

setSize

public void setSize(Dimension dimension)

Does nothing since the size cannot be set on list children individually.

Specified by:

setSize in interface AccessibleComponent

Parameters:

dimension - not used here

See Also:

AccessibleComponent.getSize()

getAccessibleAt

public Accessible getAccessibleAt(Point point)

Returns null because list children do not have children themselves

Specified by:

getAccessibleAt in interface AccessibleComponent

Parameters:

point - the location within this component's coordinate system

Returns:

null

isFocusTraversable

public boolean isFocusTraversable()

Returns true since list children are focus traversable.

Specified by:

isFocusTraversable in interface AccessibleComponent

Returns:

true

See Also:

AccessibleContext.getAccessibleStateSet(), AccessibleState.FOCUSABLE, AccessibleState.FOCUSED

requestFocus

public void requestFocus()

Requests focus on the parent list. List children cannot request focus individually.

Specified by:

requestFocus in interface AccessibleComponent

See Also:

AccessibleComponent.isFocusTraversable(), AccessibleState.FOCUSED

addFocusListener

public void addFocusListener(FocusListener listener)

Adds a focus listener to the parent list. List children do not have their own focus management.

Specified by:

addFocusListener in interface AccessibleComponent

Parameters:

listener - the focus listener to add

See Also:

AccessibleComponent.removeFocusListener(FocusListener)

removeFocusListener

public void removeFocusListener(FocusListener listener)

Removes a focus listener from the parent list. List children do not have their own focus management.

Specified by:

removeFocusListener in interface AccessibleComponent

Parameters:

listener - the focus listener to remove

See Also:

AccessibleComponent.addFocusListener(FocusListener)

getAccessibleRole

public AccessibleRole getAccessibleRole()

Returns the accessible role of this list item, which is AccessibleRole.LABEL.

Specified by:

getAccessibleRole in class AccessibleContext

Returns:

AccessibleRole.LABEL

See Also:

AccessibleRole

getAccessibleStateSet

public AccessibleStateSet getAccessibleStateSet()

Returns the accessible state set of this list item.

Specified by:

getAccessibleStateSet in class AccessibleContext

Returns:

the accessible state set of this list item

See Also:

AccessibleState, AccessibleStateSet, AccessibleContext.addPropertyChangeListener(PropertyChangeListener)

getAccessibleIndexInParent

public int getAccessibleIndexInParent()

Returns the index of this list child within it's parent list.

Specified by:

getAccessibleIndexInParent in class AccessibleContext

Returns:

the index of this list child within it's parent list

See Also:

AccessibleContext.getAccessibleParent(), AccessibleContext.getAccessibleChildrenCount(), AccessibleContext.getAccessibleChild(int)

getAccessibleChildrenCount

public int getAccessibleChildrenCount()

Returns 0 since list children don't have children themselves.

Specified by:

getAccessibleChildrenCount in class AccessibleContext

Returns:

0

See Also:

AccessibleContext.getAccessibleChild(int)

getAccessibleChild

public Accessible getAccessibleChild(int i)

Returns null since list children don't have children themselves.

Specified by:

getAccessibleChild in class AccessibleContext

Parameters:

i - the 0-based index to get

Returns:

null

See Also:

AccessibleContext.getAccessibleChildrenCount()

getLocale

public Locale getLocale()

Returns the locale of this component. This call is forwarded to the parent list since list children don't have a separate locale setting.

Specified by:

getLocale in class AccessibleContext

Returns:

the locale of this component

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener l)

This method does nothing, list children are transient accessible objects which means that they don't fire property change events.

Overrides:

addPropertyChangeListener in class AccessibleContext

Parameters:

l - not used here

See Also:

AccessibleContext.ACCESSIBLE_NAME_PROPERTY, AccessibleContext.ACCESSIBLE_DESCRIPTION_PROPERTY, AccessibleContext.ACCESSIBLE_STATE_PROPERTY, AccessibleContext.ACCESSIBLE_VALUE_PROPERTY, AccessibleContext.ACCESSIBLE_SELECTION_PROPERTY, AccessibleContext.ACCESSIBLE_TEXT_PROPERTY, AccessibleContext.ACCESSIBLE_VISIBLE_DATA_PROPERTY, AccessibleContext.removePropertyChangeListener(PropertyChangeListener)

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener l)

This method does nothing, list children are transient accessible objects which means that they don't fire property change events.

Overrides:

removePropertyChangeListener in class AccessibleContext

Parameters:

l - not used here

See Also:

AccessibleContext.addPropertyChangeListener(PropertyChangeListener)