Class JTree.AccessibleJTree

javax.swing.JTree.AccessibleJTree

All Implemented Interfaces:: Serializable, EventListener, AccessibleComponent, AccessibleExtendedComponent, AccessibleSelection, TreeExpansionListener, TreeModelListener, TreeSelectionListener

Enclosing class:: JTree

protected class JTree.AccessibleJTree extends JComponent.AccessibleJComponent implements AccessibleSelection, TreeSelectionListener, TreeModelListener, TreeExpansionListener

This class implements accessibility support for the JTree class. It provides an implementation of the Java Accessibility API appropriate to tree user-interface elements.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans has been added to the java.beans package. Please see XMLEncoder.

Since:: 1.2

Nested Class Summary

Modifier and Type	Class	Description
`protected class`	`JTree.AccessibleJTree.AccessibleJTreeNode`	This class implements accessibility support for the `JTree` child.

Nested classes/interfaces declared in class JComponent.AccessibleJComponent

JComponent.AccessibleJComponent.AccessibleContainerHandler, JComponent.AccessibleJComponent.AccessibleFocusHandler

Modifier and Type	Class	Description
`protected class`	`JComponent.AccessibleJComponent.AccessibleContainerHandler`	Fire PropertyChange listener, if one is registered, when children added/removed.
`protected class`	`JComponent.AccessibleJComponent.AccessibleFocusHandler`	Deprecated. This class is no longer used or needed.

Nested classes/interfaces declared in class Component.AccessibleAWTComponent

Component.AccessibleAWTComponent.AccessibleAWTComponentHandler, Component.AccessibleAWTComponent.AccessibleAWTFocusHandler

Modifier and Type	Class	Description
`protected class`	`Component.AccessibleAWTComponent.AccessibleAWTComponentHandler`	Fire PropertyChange listener, if one is registered, when shown/hidden..
`protected class`	`Component.AccessibleAWTComponent.AccessibleAWTFocusHandler`	Fire PropertyChange listener, if one is registered, when focus events happen

Field Summary

Fields declared in class JComponent.AccessibleJComponent

accessibleFocusHandler

Modifier and Type	Field	Description
`protected FocusListener`	`accessibleFocusHandler`	Deprecated.

Fields declared in class Container.AccessibleAWTContainer

accessibleContainerHandler

Modifier and Type	Field	Description
`protected ContainerListener`	`accessibleContainerHandler`	The handler to fire `PropertyChange` when children are added or removed

Fields declared in class Component.AccessibleAWTComponent

accessibleAWTComponentHandler, accessibleAWTFocusHandler

Modifier and Type	Field	Description
`protected ComponentListener`	`accessibleAWTComponentHandler`	A component listener to track show/hide/resize events and convert them to PropertyChange events.
`protected FocusListener`	`accessibleAWTFocusHandler`	A listener to track focus events and convert them to PropertyChange events.

Fields declared in class 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

Modifier and Type	Field	Description
`static final String`	`ACCESSIBLE_ACTION_PROPERTY`	Constant used to indicate that the supported set of actions has changed.
`static final String`	`ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY`	Constant used to determine when the active descendant of a component has changed.
`static final String`	`ACCESSIBLE_CARET_PROPERTY`	Constant used to determine when the `accessibleText` caret has changed.
`static final String`	`ACCESSIBLE_CHILD_PROPERTY`	Constant used to determine when `Accessible` children are added/removed from the object.
`static final String`	`ACCESSIBLE_COMPONENT_BOUNDS_CHANGED`	`PropertyChangeEvent` which indicates that a change has occurred in a component's bounds.
`static final String`	`ACCESSIBLE_DESCRIPTION_PROPERTY`	Constant used to determine when the `AccessibleContext.accessibleDescription` property has changed.
`static final String`	`ACCESSIBLE_HYPERTEXT_OFFSET`	Constant used to indicate that a hypertext element has received focus.
`static final String`	`ACCESSIBLE_INVALIDATE_CHILDREN`	`PropertyChangeEvent` which indicates that a significant change has occurred to the children of a component like a tree or text.
`static final String`	`ACCESSIBLE_NAME_PROPERTY`	Constant used to determine when the `AccessibleContext.accessibleName` property has changed.
`static final String`	`ACCESSIBLE_SELECTION_PROPERTY`	Constant used to determine when the `accessibleSelection` has changed.
`static final String`	`ACCESSIBLE_STATE_PROPERTY`	Constant used to determine when the `accessibleStateSet` property has changed.
`static final String`	`ACCESSIBLE_TABLE_CAPTION_CHANGED`	Constant used to indicate that the table caption has changed.
`static final String`	`ACCESSIBLE_TABLE_COLUMN_DESCRIPTION_CHANGED`	Constant used to indicate that the column description has changed.
`static final String`	`ACCESSIBLE_TABLE_COLUMN_HEADER_CHANGED`	Constant used to indicate that the column header has changed.
`static final String`	`ACCESSIBLE_TABLE_MODEL_CHANGED`	Constant used to indicate that table data has changed.
`static final String`	`ACCESSIBLE_TABLE_ROW_DESCRIPTION_CHANGED`	Constant used to indicate that the row description has changed.
`static final String`	`ACCESSIBLE_TABLE_ROW_HEADER_CHANGED`	Constant used to indicate that the row header has changed.
`static final String`	`ACCESSIBLE_TABLE_SUMMARY_CHANGED`	Constant used to indicate that the table summary has changed.
`static final String`	`ACCESSIBLE_TEXT_ATTRIBUTES_CHANGED`	`PropertyChangeEvent` which indicates that text attributes have changed.
`static final String`	`ACCESSIBLE_TEXT_PROPERTY`	`PropertyChangeEvent` which indicates that text has changed.
`static final String`	`ACCESSIBLE_VALUE_PROPERTY`	Constant used to determine when the `accessibleValue` property has changed.
`static final String`	`ACCESSIBLE_VISIBLE_DATA_PROPERTY`	Constant used to determine when the visual appearance of the object has changed.
`protected String`	`accessibleDescription`	A localized String containing the description of the object.
`protected String`	`accessibleName`	A localized String containing the name of the object.
`protected Accessible`	`accessibleParent`	The accessible parent of this object.

Constructor Summary

Constructor	Description
`AccessibleJTree()`	Constructs `AccessibleJTree`

Method Summary

Modifier and Type	Method	Description
`void`	`addAccessibleSelection(int i)`	Adds the specified selected item in the object to the object's selection.
`void`	`clearAccessibleSelection()`	Clears the selection in the object, so that nothing in the object is selected.
`void`	`fireVisibleDataPropertyChange()`	Fire a visible data property change notification.
`Accessible`	`getAccessibleAt(Point p)`	Returns the `Accessible` child, if one exists, contained at the local coordinate `Point`.
`Accessible`	`getAccessibleChild(int i)`	Return the nth Accessible child of the object.
`int`	`getAccessibleChildrenCount()`	Returns the number of top-level children nodes of this JTree.
`int`	`getAccessibleIndexInParent()`	Get the index of this object in its accessible parent.
`AccessibleRole`	`getAccessibleRole()`	Get the role of this object.
`AccessibleSelection`	`getAccessibleSelection()`	Get the AccessibleSelection associated with this object.
`Accessible`	`getAccessibleSelection(int i)`	Returns an Accessible representing the specified selected item in the object.
`int`	`getAccessibleSelectionCount()`	Returns the number of items currently selected.
`boolean`	`isAccessibleChildSelected(int i)`	Returns true if the current child of this object is selected.
`void`	`removeAccessibleSelection(int i)`	Removes the specified selected item in the object from the object's selection.
`void`	`selectAllAccessibleSelection()`	Causes every selected item in the object to be selected if the object supports multiple selections.
`void`	`treeCollapsed(TreeExpansionEvent e)`	Tree Collapsed notification.
`void`	`treeExpanded(TreeExpansionEvent e)`	Tree Model Expansion notification.
`void`	`treeNodesChanged(TreeModelEvent e)`	Tree Model Node change notification.
`void`	`treeNodesInserted(TreeModelEvent e)`	Tree Model Node change notification.
`void`	`treeNodesRemoved(TreeModelEvent e)`	Tree Model Node change notification.
`void`	`treeStructureChanged(TreeModelEvent e)`	Tree Model structure change change notification.
`void`	`valueChanged(TreeSelectionEvent e)`	Tree Selection Listener value change method.

Methods declared in class JComponent.AccessibleJComponent

addPropertyChangeListener, getAccessibleDescription, getAccessibleKeyBinding, getAccessibleName, getAccessibleStateSet, getBorderTitle, getTitledBorderText, getToolTipText, removePropertyChangeListener

Modifier and Type	Method	Description
`void`	`addPropertyChangeListener(PropertyChangeListener listener)`	Adds a PropertyChangeListener to the listener list.
`String`	`getAccessibleDescription()`	Gets the accessible description of this object.
`AccessibleKeyBinding`	`getAccessibleKeyBinding()`	Returns key bindings associated with this object
`String`	`getAccessibleName()`	Gets the accessible name of this object.
`AccessibleStateSet`	`getAccessibleStateSet()`	Gets the state of this object.
`protected String`	`getBorderTitle(Border b)`	Recursively search through the border hierarchy (if it exists) for a TitledBorder with a non-null title.
`String`	`getTitledBorderText()`	Returns the titled border text
`String`	`getToolTipText()`	Returns the tool tip text
`void`	`removePropertyChangeListener(PropertyChangeListener listener)`	Removes a PropertyChangeListener from the listener list.

Methods declared in class Component.AccessibleAWTComponent

addFocusListener, contains, getAccessibleComponent, getAccessibleParent, getBackground, getBounds, getCursor, getFont, getFontMetrics, getForeground, getLocale, getLocation, getLocationOnScreen, getSize, isEnabled, isFocusTraversable, isShowing, isVisible, removeFocusListener, requestFocus, setBackground, setBounds, setCursor, setEnabled, setFont, setForeground, setLocation, setSize, setVisible

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.
`AccessibleComponent`	`getAccessibleComponent()`	Gets the `AccessibleComponent` associated with this object if one exists.
`Accessible`	`getAccessibleParent()`	Gets the `Accessible` parent 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()`	Returns the locale of this object.
`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`	`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 cursor)`	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 AccessibleContext

firePropertyChange, getAccessibleAction, getAccessibleEditableText, getAccessibleIcon, getAccessibleRelationSet, getAccessibleTable, getAccessibleText, getAccessibleValue, setAccessibleDescription, setAccessibleName, setAccessibleParent

Modifier and Type	Method	Description
`void`	`firePropertyChange(String propertyName, Object oldValue, Object newValue)`	Support for reporting bound property changes.
`AccessibleAction`	`getAccessibleAction()`	Gets the `AccessibleAction` associated with this object that supports one or more actions.
`AccessibleEditableText`	`getAccessibleEditableText()`	Gets the `AccessibleEditableText` associated with this object presenting editable text on the display.
`AccessibleIcon[]`	`getAccessibleIcon()`	Gets the `AccessibleIcons` associated with an object that has one or more associated icons.
`AccessibleRelationSet`	`getAccessibleRelationSet()`	Gets the `AccessibleRelationSet` associated with an object.
`AccessibleTable`	`getAccessibleTable()`	Gets the `AccessibleTable` associated with an object.
`AccessibleText`	`getAccessibleText()`	Gets the `AccessibleText` associated with this object presenting text on the display.
`AccessibleValue`	`getAccessibleValue()`	Gets the `AccessibleValue` associated with this object that supports a `Numerical` value.
`void`	`setAccessibleDescription(String s)`	Sets the accessible description of this object.
`void`	`setAccessibleName(String s)`	Sets the localized accessible name of this object.
`void`	`setAccessibleParent(Accessible a)`	Sets the `Accessible` parent of this object.

Methods declared in class Object

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

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

AccessibleJTree

public AccessibleJTree()

Constructs AccessibleJTree

Method Details

valueChanged

public void valueChanged(TreeSelectionEvent e)

Tree Selection Listener value change method. Used to fire the property change

Specified by:: valueChanged in interface TreeSelectionListener
Parameters:: e - ListSelectionEvent

fireVisibleDataPropertyChange

public void fireVisibleDataPropertyChange()

Fire a visible data property change notification. A 'visible' data property is one that represents something about the way the component appears on the display, where that appearance isn't bound to any other property. It notifies screen readers that the visual appearance of the component has changed, so they can notify the user.

treeNodesChanged

public void treeNodesChanged(TreeModelEvent e)

Tree Model Node change notification.

Specified by:: treeNodesChanged in interface TreeModelListener
Parameters:: e - a Tree Model event

treeNodesInserted

public void treeNodesInserted(TreeModelEvent e)

Tree Model Node change notification.

Specified by:: treeNodesInserted in interface TreeModelListener
Parameters:: e - a Tree node insertion event

treeNodesRemoved

public void treeNodesRemoved(TreeModelEvent e)

Tree Model Node change notification.

Specified by:: treeNodesRemoved in interface TreeModelListener
Parameters:: e - a Tree node(s) removal event

treeStructureChanged

public void treeStructureChanged(TreeModelEvent e)

Tree Model structure change change notification.

Specified by:: treeStructureChanged in interface TreeModelListener
Parameters:: e - a Tree Model event

treeCollapsed

public void treeCollapsed(TreeExpansionEvent e)

Tree Collapsed notification.

Specified by:: treeCollapsed in interface TreeExpansionListener
Parameters:: e - a TreeExpansionEvent

treeExpanded

public void treeExpanded(TreeExpansionEvent e)

Tree Model Expansion notification.

Specified by:: treeExpanded in interface TreeExpansionListener
Parameters:: e - a Tree node insertion event

getAccessibleRole

public AccessibleRole getAccessibleRole()

Get the role of this object.

Overrides:

getAccessibleRole in class JComponent.AccessibleJComponent

Returns:

an instance of AccessibleRole describing the role of the object

See Also:

getAccessibleAt

public Accessible getAccessibleAt(Point p)

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

Specified by:: getAccessibleAt in interface AccessibleComponent
Overrides:: getAccessibleAt in class Container.AccessibleAWTContainer
Parameters:: p - point in local coordinates of this Accessible
Returns:: the Accessible, if it exists, at the specified location; else null

getAccessibleChildrenCount

public int getAccessibleChildrenCount()

Returns the number of top-level children nodes of this JTree. Each of these nodes may in turn have children nodes.

Overrides:: getAccessibleChildrenCount in class JComponent.AccessibleJComponent
Returns:: the number of accessible children nodes in the tree.

getAccessibleChild

public Accessible getAccessibleChild(int i)

Return the nth Accessible child of the object.

Overrides:

getAccessibleChild in class JComponent.AccessibleJComponent

Parameters:

i - zero-based index of child

Returns:

the nth Accessible child of the object

See Also:

getAccessibleIndexInParent

public int getAccessibleIndexInParent()

Get the index of this object in its accessible parent.

Overrides:

getAccessibleIndexInParent in class Component.AccessibleAWTComponent

Returns:

the index of this object in its parent. Since a JTree top-level object does not have an accessible parent.

See Also:

getAccessibleSelection

public AccessibleSelection getAccessibleSelection()

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

Overrides:

getAccessibleSelection in class AccessibleContext

Returns:

this object

See Also:

getAccessibleSelectionCount

public int getAccessibleSelectionCount()

Returns the number of items currently selected. If no items are selected, the return value will be 0.

Specified by:: getAccessibleSelectionCount in interface AccessibleSelection
Returns:: the number of items currently selected.

getAccessibleSelection

public Accessible getAccessibleSelection(int i)

Returns an Accessible representing the specified selected item in the object. If there isn't a selection, or there are fewer items selected than the integer passed in, the return value will be null.

Specified by:

getAccessibleSelection in interface AccessibleSelection

Parameters:

i - the zero-based index of selected items

Returns:

an Accessible containing the selected item

See Also:

isAccessibleChildSelected

public boolean isAccessibleChildSelected(int i)

Returns true if the current child of this object is selected.

Specified by:

isAccessibleChildSelected in interface AccessibleSelection

Parameters:

i - the zero-based index of the child in this Accessible object.

Returns:

true if the current child of this object is selected; else false

See Also:

addAccessibleSelection

public void addAccessibleSelection(int i)

Adds the specified selected item in the object to the object's selection. If the object supports multiple selections, the specified item is added to any existing selection, otherwise it replaces any existing selection in the object. If the specified item is already selected, this method has no effect.

Specified by:

addAccessibleSelection in interface AccessibleSelection

Parameters:

i - the zero-based index of selectable items

See Also:

removeAccessibleSelection

public void removeAccessibleSelection(int i)

Removes the specified selected item in the object from the object's selection. If the specified item isn't currently selected, this method has no effect.

Specified by:

removeAccessibleSelection in interface AccessibleSelection

Parameters:

i - the zero-based index of selectable items

See Also:

clearAccessibleSelection

public void clearAccessibleSelection()

Clears the selection in the object, so that nothing in the object is selected.

Specified by:: clearAccessibleSelection in interface AccessibleSelection

selectAllAccessibleSelection

public void selectAllAccessibleSelection()

Causes every selected item in the object to be selected if the object supports multiple selections.

Specified by:: selectAllAccessibleSelection in interface AccessibleSelection

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