javax.swing

## Class JTree.AccessibleJTree

- java.lang.Object
- - javax.accessibility.AccessibleContext
  - - java.awt.Component.AccessibleAWTComponent
    - - java.awt.Container.AccessibleAWTContainer
      - - javax.swing.JComponent.AccessibleJComponent
        - - 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`.

### Nested Class Summary

Nested Classes
`protected class` `JTree.AccessibleJTree.AccessibleJTreeNode` This class implements accessibility support for the `JTree` child.

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

`JComponent.AccessibleJComponent.AccessibleContainerHandler, JComponent.AccessibleJComponent.AccessibleFocusHandler`

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

`Component.AccessibleAWTComponent.AccessibleAWTComponentHandler, Component.AccessibleAWTComponent.AccessibleAWTFocusHandler`

### Field Summary

### Fields inherited from class javax.swing.JComponent.AccessibleJComponent

`accessibleFocusHandler`

### Fields inherited from class java.awt.Container.AccessibleAWTContainer

`accessibleContainerHandler`

### Fields inherited from class java.awt.Component.AccessibleAWTComponent

`accessibleAWTComponentHandler, accessibleAWTFocusHandler`

### 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
`AccessibleJTree()`

### Method Summary

All Methods Instance Methods Concrete Methods
`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 inherited from class javax.swing.JComponent.AccessibleJComponent

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

### Methods inherited from class java.awt.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`

### Methods inherited from class javax.accessibility.AccessibleContext

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

### Methods inherited from class java.lang.Object

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

### Methods inherited from interface javax.accessibility.AccessibleComponent

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

### Constructor Detail

#### AccessibleJTree

    public AccessibleJTree()

### Method Detail

#### 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:
  `AccessibleRole`

#### 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:
  `AccessibleContext.getAccessibleChildrenCount()`

#### 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:
  `Component.AccessibleAWTComponent.getAccessibleParent()`

#### 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:
  `AccessibleSelection`

#### 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:
  `AccessibleSelection.getAccessibleSelectionCount()`

#### 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:
  `AccessibleContext.getAccessibleChild(int)`

#### 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:
  `AccessibleContext.getAccessibleChild(int)`

#### 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:
  `AccessibleContext.getAccessibleChild(int)`

#### 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`