Class JList.AccessibleJList.AccessibleJListChild

java.lang.Object

javax.accessibility.AccessibleContext

javax.swing.JList.AccessibleJList.AccessibleJListChild

All Implemented Interfaces:

Accessible, AccessibleAction, AccessibleComponent

Enclosing class:

JList.AccessibleJList

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

This class implements accessibility support appropriate for list children.

Since:

1.2

Field Summary

Fields declared in 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

Fields declared in interface javax.accessibility.AccessibleAction

CLICK, DECREMENT, INCREMENT, TOGGLE_EXPAND, TOGGLE_POPUP

Constructor Summary

Constructors

Constructor	Description
AccessibleJListChild(JList<E> parent, int indexInParent)	Constructs an AccessibleJListChild.

Method Summary

Modifier and Type	Method	Description
void	addFocusListener(FocusListener l)	Adds the specified focus listener to receive focus events from this component.
boolean	contains(Point p)	Checks whether the specified point is within this object's bounds, where the point's x and y coordinates are defined to be relative to the coordinate system of the object.
boolean	doAccessibleAction(int i)	Performs the specified action on the object.
AccessibleAction	getAccessibleAction()	Gets the AccessibleAction associated with this object that supports one or more actions.
int	getAccessibleActionCount()	Returns the number of accessible actions available in this object If there are more than one, the first one is considered the "default" action of the object.
String	getAccessibleActionDescription(int i)	Returns a description of the specified action of the object.
Accessible	getAccessibleAt(Point p)	Returns the Accessible child, if one exists, contained at the local coordinate Point.
Accessible	getAccessibleChild(int i)	Returns the specified Accessible child of the object.
int	getAccessibleChildrenCount()	Returns the number of accessible children of the object.
AccessibleComponent	getAccessibleComponent()	Get the AccessibleComponent associated with this object.
AccessibleContext	getAccessibleContext()	Get the AccessibleContext for this object.
AccessibleIcon[]	getAccessibleIcon()	Returns the icon for the element renderer, as the only item of an array of AccessibleIcons or a null array if the renderer component contains no icons.
int	getAccessibleIndexInParent()	Gets the 0-based index of this object in its accessible parent.
AccessibleRole	getAccessibleRole()	Gets the role of this object.
AccessibleStateSet	getAccessibleStateSet()	Gets the state set of this object.
Color	getBackground()	Gets the background color of this object.
Rectangle	getBounds()	Gets the bounds of this object in the form of a Rectangle object.
Cursor	getCursor()	Gets the cursor of this object.
Font	getFont()	Gets the font of this object.
FontMetrics	getFontMetrics(Font f)	Gets the FontMetrics of this object.
Color	getForeground()	Gets the foreground color of this object.
Locale	getLocale()	Gets the locale of the component.
Point	getLocation()	Gets the location of the object relative to the parent in the form of a point specifying the object's top-left corner in the screen's coordinate space.
Point	getLocationOnScreen()	Returns the location of the object on the screen.
Dimension	getSize()	Returns the size of this object in the form of a Dimension object.
boolean	isEnabled()	Determines if the object is enabled.
boolean	isFocusTraversable()	Returns whether this object can accept focus or not.
boolean	isShowing()	Determines if the object is showing.
boolean	isVisible()	Determines if the object is visible.
void	removeFocusListener(FocusListener l)	Removes the specified focus listener so it no longer receives focus events from this component.
void	requestFocus()	Requests focus for this object.
void	setAccessibleDescription(String s)	Sets the accessible description of this object.
void	setAccessibleName(String s)	Sets the localized accessible name of this object.
void	setBackground(Color c)	Sets the background color of this object.
void	setBounds(Rectangle r)	Sets the bounds of this object in the form of a Rectangle object.
void	setCursor(Cursor c)	Sets the cursor of this object.
void	setEnabled(boolean b)	Sets the enabled state of the object.
void	setFont(Font f)	Sets the font of this object.
void	setForeground(Color c)	Sets the foreground color of this object.
void	setLocation(Point p)	Sets the location of the object relative to the parent.
void	setSize(Dimension d)	Resizes this object so that it has width and height.
void	setVisible(boolean b)	Sets the visible state of the object.

Methods declared in class javax.accessibility.AccessibleContext

addPropertyChangeListener, firePropertyChange, getAccessibleDescription, getAccessibleEditableText, getAccessibleName, getAccessibleParent, getAccessibleRelationSet, getAccessibleSelection, getAccessibleTable, getAccessibleText, getAccessibleValue, removePropertyChangeListener, setAccessibleParent

Methods declared in class java.lang.Object

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

Constructor Details

AccessibleJListChild

public AccessibleJListChild(JList<E> parent,
 int indexInParent)

Constructs an AccessibleJListChild.

Parameters:

parent - the parent

indexInParent - the index in the parent

Method Details

getAccessibleContext

public AccessibleContext getAccessibleContext()

Get the AccessibleContext for this object. In the implementation of the Java Accessibility API for this class, returns this object, which is its own AccessibleContext.

Specified by:

getAccessibleContext in interface Accessible

Returns:

this object

setAccessibleName

public void setAccessibleName(String s)

Description copied from class: AccessibleContext

Sets the localized accessible name of this object. Changing the name will cause a PropertyChangeEvent to be fired for the ACCESSIBLE_NAME_PROPERTY property.

Overrides:

setAccessibleName in class AccessibleContext

Parameters:

s - the new localized name of the object

See Also:

• AccessibleContext.getAccessibleName()
• AccessibleContext.addPropertyChangeListener(java.beans.PropertyChangeListener)

setAccessibleDescription

public void setAccessibleDescription(String s)

Description copied from class: AccessibleContext

Sets the accessible description of this object. Changing the name will cause a PropertyChangeEvent to be fired for the ACCESSIBLE_DESCRIPTION_PROPERTY property.

Overrides:

setAccessibleDescription in class AccessibleContext

Parameters:

s - the new localized description of the object

See Also:

• AccessibleContext.setAccessibleName(java.lang.String)
• AccessibleContext.addPropertyChangeListener(java.beans.PropertyChangeListener)

getAccessibleRole

public AccessibleRole getAccessibleRole()

Description copied from class: AccessibleContext

Gets the role of this object. The role of the object is the generic purpose or use of the class of this object. For example, the role of a push button is AccessibleRole.PUSH_BUTTON. The roles in AccessibleRole are provided so component developers can pick from a set of predefined roles. This enables assistive technologies to provide a consistent interface to various tweaked subclasses of components (e.g., use AccessibleRole.PUSH_BUTTON for all components that act like a push button) as well as distinguish between subclasses that behave differently (e.g., AccessibleRole.CHECK_BOX for check boxes and AccessibleRole.RADIO_BUTTON for radio buttons).

Note that the AccessibleRole class is also extensible, so custom component developers can define their own AccessibleRole's if the set of predefined roles is inadequate.

Specified by:

getAccessibleRole in class AccessibleContext

Returns:

an instance of AccessibleRole describing the role of the object

See Also:

• AccessibleRole

getAccessibleStateSet

public AccessibleStateSet getAccessibleStateSet()

Description copied from class: AccessibleContext

Gets the state set of this object. The AccessibleStateSet of an object is composed of a set of unique AccessibleStates. A change in the AccessibleStateSet of an object will cause a PropertyChangeEvent to be fired for the ACCESSIBLE_STATE_PROPERTY property.

Specified by:

getAccessibleStateSet in class AccessibleContext

Returns:

an instance of AccessibleStateSet containing the current state set of the object

See Also:

• AccessibleStateSet
• AccessibleState
• AccessibleContext.addPropertyChangeListener(java.beans.PropertyChangeListener)

getAccessibleIndexInParent

public int getAccessibleIndexInParent()

Description copied from class: AccessibleContext

Gets the 0-based index of this object in its accessible parent.

Specified by:

getAccessibleIndexInParent in class AccessibleContext

Returns:

the 0-based index of this object in its parent; -1 if this object does not have an accessible parent.

See Also:

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

getAccessibleChildrenCount

public int getAccessibleChildrenCount()

Description copied from class: AccessibleContext

Returns the number of accessible children of the object.

Specified by:

getAccessibleChildrenCount in class AccessibleContext

Returns:

the number of accessible children of the object.

getAccessibleChild

public Accessible getAccessibleChild(int i)

Description copied from class: AccessibleContext

Returns the specified Accessible child of the object. The Accessible children of an Accessible object are zero-based, so the first child of an Accessible child is at index 0, the second child is at index 1, and so on.

Specified by:

getAccessibleChild in class AccessibleContext

Parameters:

i - zero-based index of child

Returns:

the Accessible child of the object

See Also:

• AccessibleContext.getAccessibleChildrenCount()

getLocale

public Locale getLocale()

Description copied from class: AccessibleContext

Gets the locale of the component. If the component does not have a locale, then the locale of its parent is returned.

Specified by:

getLocale in class AccessibleContext

Returns:

this component's locale. If this component does not have a locale, the locale of its parent is returned.

getAccessibleComponent

public AccessibleComponent getAccessibleComponent()

Get the AccessibleComponent associated with this object. In the implementation of the Java Accessibility API for this class, return this object, which is responsible for implementing the AccessibleComponent interface on behalf of itself.

Overrides:

getAccessibleComponent in class AccessibleContext

Returns:

this object

See Also:

• AccessibleComponent

getBackground

public Color getBackground()

Description copied from interface: AccessibleComponent

Gets the background color of this object.

Specified by:

getBackground in interface AccessibleComponent

Returns:

the background color, if supported, of the object; otherwise, null

See Also:

• AccessibleComponent.setBackground(java.awt.Color)

setBackground

public void setBackground(Color c)

Description copied from interface: AccessibleComponent

Sets the background color of this object.

Specified by:

setBackground in interface AccessibleComponent

Parameters:

c - the new color for the background

See Also:

• AccessibleComponent.getBackground()

getForeground

public Color getForeground()

Description copied from interface: AccessibleComponent

Gets the foreground color of this object.

Specified by:

getForeground in interface AccessibleComponent

Returns:

the foreground color, if supported, of the object; otherwise, null

See Also:

• AccessibleComponent.setForeground(java.awt.Color)

setForeground

public void setForeground(Color c)

Description copied from interface: AccessibleComponent

Sets the foreground color of this object.

Specified by:

setForeground in interface AccessibleComponent

Parameters:

c - the new color for the foreground

See Also:

• AccessibleComponent.getForeground()

getCursor

public Cursor getCursor()

Description copied from interface: AccessibleComponent

Gets the cursor of this object.

Specified by:

getCursor in interface AccessibleComponent

Returns:

the cursor, if supported, of the object; otherwise, null

See Also:

• AccessibleComponent.setCursor(java.awt.Cursor)

setCursor

public void setCursor(Cursor c)

Description copied from interface: AccessibleComponent

Sets the cursor of this object.

Specified by:

setCursor in interface AccessibleComponent

Parameters:

c - the new cursor for the object

See Also:

• AccessibleComponent.getCursor()

getFont

public Font getFont()

Description copied from interface: AccessibleComponent

Gets the font of this object.

Specified by:

getFont in interface AccessibleComponent

Returns:

the font, if supported, for the object; otherwise, null

See Also:

• AccessibleComponent.setFont(java.awt.Font)

setFont

public void setFont(Font f)

Description copied from interface: AccessibleComponent

Sets the font of this object.

Specified by:

setFont in interface AccessibleComponent

Parameters:

f - the new font for the object

See Also:

• AccessibleComponent.getFont()

getFontMetrics

public FontMetrics getFontMetrics(Font f)

Description copied from interface: AccessibleComponent

Gets the FontMetrics of this object.

Specified by:

getFontMetrics in interface AccessibleComponent

Parameters:

f - the font for which font metrics is to be obtained

Returns:

the FontMetrics, if supported, the object; otherwise, null

See Also:

• AccessibleComponent.getFont()

isEnabled

public boolean isEnabled()

Description copied from interface: AccessibleComponent

Determines if the object is enabled. Objects that are enabled will also have the AccessibleState.ENABLED state set in their AccessibleStateSets.

Specified by:

isEnabled in interface AccessibleComponent

Returns:

true if object is enabled; otherwise, false

See Also:

• AccessibleComponent.setEnabled(boolean)
• AccessibleContext.getAccessibleStateSet()
• AccessibleState.ENABLED
• AccessibleStateSet

setEnabled

public void setEnabled(boolean b)

Description copied from interface: AccessibleComponent

Sets the enabled state of the object.

Specified by:

setEnabled in interface AccessibleComponent

Parameters:

b - if true, enables this object; otherwise, disables it

See Also:

• AccessibleComponent.isEnabled()

isVisible

public boolean isVisible()

Description copied from interface: AccessibleComponent

Determines if the object is visible. Note: this means that the object intends to be visible; however, it may not be showing on the screen because one of the objects that this object is contained by is currently not visible. To determine if an object is showing on the screen, use AccessibleComponent.isShowing()

Objects that are visible will also have the AccessibleState.VISIBLE state set in their AccessibleStateSets.

Specified by:

isVisible in interface AccessibleComponent

Returns:

true if object is visible; otherwise, false

See Also:

• AccessibleComponent.setVisible(boolean)
• AccessibleContext.getAccessibleStateSet()
• AccessibleState.VISIBLE
• AccessibleStateSet

setVisible

public void setVisible(boolean b)

Description copied from interface: AccessibleComponent

Sets the visible state of the object.

Specified by:

setVisible in interface AccessibleComponent

Parameters:

b - if true, shows this object; otherwise, hides it

See Also:

• AccessibleComponent.isVisible()

isShowing

public boolean isShowing()

Description copied from interface: AccessibleComponent

Determines if the object is showing. This is determined by checking the visibility of the object and its ancestors. Note: this will return true even if the object is obscured by another (for example, it is underneath a menu that was pulled down).

Specified by:

isShowing in interface AccessibleComponent

Returns:

true if object is showing; otherwise, false

contains

public boolean contains(Point p)

Description copied from interface: AccessibleComponent

Checks whether the specified point is within this object's bounds, where the point's x and y coordinates are defined to be relative to the coordinate system of the object.

Specified by:

contains in interface AccessibleComponent

Parameters:

p - the point relative to the coordinate system of the object

Returns:

true if object contains point; otherwise false

See Also:

• AccessibleComponent.getBounds()

getLocationOnScreen

public Point getLocationOnScreen()

Description copied from interface: AccessibleComponent

Returns the location of the object on the screen.

Specified by:

getLocationOnScreen in interface AccessibleComponent

Returns:

the location of the object on screen; null if this object is not on the screen

See Also:

• AccessibleComponent.getBounds()
• AccessibleComponent.getLocation()

getLocation

public Point getLocation()

Description copied from interface: AccessibleComponent

Gets the location of the object relative to the parent in the form of a point specifying the object's top-left corner in the screen's coordinate space.

Specified by:

getLocation in interface AccessibleComponent

Returns:

An instance of Point representing the top-left corner of the object's bounds in the coordinate space of the screen; null if this object or its parent are not on the screen

See Also:

• AccessibleComponent.getBounds()
• AccessibleComponent.getLocationOnScreen()

setLocation

public void setLocation(Point p)

Description copied from interface: AccessibleComponent

Sets the location of the object relative to the parent.

Specified by:

setLocation in interface AccessibleComponent

Parameters:

p - the new position for the top-left corner

See Also:

• AccessibleComponent.getLocation()

getBounds

public Rectangle getBounds()

Description copied from interface: AccessibleComponent

Gets the bounds of this object in the form of a Rectangle object. The bounds specify this object's width, height, and location relative to its parent.

Specified by:

getBounds in interface AccessibleComponent

Returns:

A rectangle indicating this component's bounds; null if this object is not on the screen.

See Also:

• AccessibleComponent.contains(java.awt.Point)

setBounds

public void setBounds(Rectangle r)

Description copied from interface: AccessibleComponent

Sets the bounds of this object in the form of a Rectangle object. The bounds specify this object's width, height, and location relative to its parent.

Specified by:

setBounds in interface AccessibleComponent

Parameters:

r - rectangle indicating this component's bounds

See Also:

• AccessibleComponent.getBounds()

getSize

public Dimension getSize()

Description copied from interface: AccessibleComponent

Returns the size of this object in the form of a Dimension object. The height field of the Dimension object contains this object's height, and the width field of the Dimension object contains this object's width.

Specified by:

getSize in interface AccessibleComponent

Returns:

A Dimension object that indicates the size of this component; null if this object is not on the screen

See Also:

• AccessibleComponent.setSize(java.awt.Dimension)

setSize

public void setSize(Dimension d)

Description copied from interface: AccessibleComponent

Resizes this object so that it has width and height.

Specified by:

setSize in interface AccessibleComponent

Parameters:

d - The dimension specifying the new size of the object

See Also:

• AccessibleComponent.getSize()

getAccessibleAt

public Accessible getAccessibleAt(Point p)

Description copied from interface: AccessibleComponent

Returns the Accessible child, if one exists, contained at the local coordinate Point.

Specified by:

getAccessibleAt in interface AccessibleComponent

Parameters:

p - The point relative to the coordinate system of this object

Returns:

the Accessible, if it exists, at the specified location; otherwise null

isFocusTraversable

public boolean isFocusTraversable()

Description copied from interface: AccessibleComponent

Returns whether this object can accept focus or not. Objects that can accept focus will also have the AccessibleState.FOCUSABLE state set in their AccessibleStateSets.

Specified by:

isFocusTraversable in interface AccessibleComponent

Returns:

true if object can accept focus; otherwise false

See Also:

• AccessibleContext.getAccessibleStateSet()
• AccessibleState.FOCUSABLE
• AccessibleState.FOCUSED
• AccessibleStateSet

requestFocus

public void requestFocus()

Description copied from interface: AccessibleComponent

Requests focus for this object. If this object cannot accept focus, nothing will happen. Otherwise, the object will attempt to take focus.

Specified by:

requestFocus in interface AccessibleComponent

See Also:

• AccessibleComponent.isFocusTraversable()

addFocusListener

public void addFocusListener(FocusListener l)

Description copied from interface: AccessibleComponent

Adds the specified focus listener to receive focus events from this component.

Specified by:

addFocusListener in interface AccessibleComponent

Parameters:

l - the focus listener

See Also:

• AccessibleComponent.removeFocusListener(java.awt.event.FocusListener)

removeFocusListener

public void removeFocusListener(FocusListener l)

Description copied from interface: AccessibleComponent

Removes the specified focus listener so it no longer receives focus events from this component.

Specified by:

removeFocusListener in interface AccessibleComponent

Parameters:

l - the focus listener

See Also:

• AccessibleComponent.addFocusListener(java.awt.event.FocusListener)

getAccessibleIcon

public AccessibleIcon[] getAccessibleIcon()

Returns the icon for the element renderer, as the only item of an array of AccessibleIcons or a null array if the renderer component contains no icons.

Overrides:

getAccessibleIcon in class AccessibleContext

Returns:

an array containing the accessible icon or a null array if none

Since:

1.3

See Also:

• AccessibleIcon

getAccessibleAction

public AccessibleAction getAccessibleAction()

Gets the AccessibleAction associated with this object that supports one or more actions.

Overrides:

getAccessibleAction in class AccessibleContext

Implementation Requirements:

Returns the AccessibleAction for this AccessibleJListChild as follows: First getListCellRendererComponent of the ListCellRenderer for the component at the "index in parent" of this child is called. Then its AccessibleContext is fetched and that AccessibleContext's AccessibleAction is returned. Note that if an AccessibleAction is not found using this process then this object with its implementation of the AccessibleAction interface is returned.

Returns:

AccessibleAction if supported by object; else return null

Since:

9

See Also:

• AccessibleAction

doAccessibleAction

public boolean doAccessibleAction(int i)

Performs the specified action on the object.

Specified by:

doAccessibleAction in interface AccessibleAction

Implementation Requirements:

If i == 0 selects this AccessibleJListChild by calling JList.this.setSelectedIndex(indexInParent) and then returns true; otherwise returns false.

Parameters:

i - zero-based index of actions

Returns:

true if the action was performed; otherwise false

Since:

9

See Also:

• AccessibleAction.getAccessibleActionCount()

getAccessibleActionDescription

public String getAccessibleActionDescription(int i)

Returns a description of the specified action of the object.

Specified by:

getAccessibleActionDescription in interface AccessibleAction

Implementation Requirements:

If i == 0 returns the action description fetched from UIManager.getString("AbstractButton.clickText"); otherwise returns null.

Parameters:

i - zero-based index of the actions

Returns:

a String description of the action

Since:

9

See Also:

• AccessibleAction.getAccessibleActionCount()

getAccessibleActionCount

public int getAccessibleActionCount()

Returns the number of accessible actions available in this object If there are more than one, the first one is considered the "default" action of the object.

Specified by:

getAccessibleActionCount in interface AccessibleAction

Implementation Requirements:

Returns 1, i.e. there is only one action.

Returns:

the zero-based number of actions in this object

Since:

9