AccessibleAction (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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Java^TM 2 Platform
Standard Ed. 5.0

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javax.accessibility
Interface AccessibleAction

All Known Implementing Classes:: AbstractButton.AccessibleAbstractButton, AccessibleHyperlink, Button.AccessibleAWTButton, Checkbox.AccessibleAWTCheckbox, CheckboxMenuItem.AccessibleAWTCheckboxMenuItem, Choice.AccessibleAWTChoice, JButton.AccessibleJButton, JCheckBox.AccessibleJCheckBox, JCheckBoxMenuItem.AccessibleJCheckBoxMenuItem, JComboBox.AccessibleJComboBox, JEditorPane.AccessibleJEditorPane, JEditorPane.AccessibleJEditorPaneHTML, JEditorPane.JEditorPaneAccessibleHypertextSupport, JEditorPane.JEditorPaneAccessibleHypertextSupport.HTMLLink, JMenu.AccessibleJMenu, JMenuItem.AccessibleJMenuItem, JPasswordField.AccessibleJPasswordField, JRadioButton.AccessibleJRadioButton, JRadioButtonMenuItem.AccessibleJRadioButtonMenuItem, JSpinner.AccessibleJSpinner, JTextArea.AccessibleJTextArea, JTextComponent.AccessibleJTextComponent, JTextField.AccessibleJTextField, JToggleButton.AccessibleJToggleButton, JTree.AccessibleJTree.AccessibleJTreeNode, Menu.AccessibleAWTMenu, MenuItem.AccessibleAWTMenuItem, PopupMenu.AccessibleAWTPopupMenu

public interface AccessibleAction

The AccessibleAction interface should be supported by any object that can perform one or more actions. This interface provides the standard mechanism for an assistive technology to determine what those actions are as well as tell the object to perform them. Any object that can be manipulated should support this interface. Applications can determine if an object supports the AccessibleAction interface by first obtaining its AccessibleContext (see Accessible) and then calling the AccessibleContext.getAccessibleAction() method. If the return value is not null, the object supports this interface.

See Also:: Accessible, Accessible.getAccessibleContext(), AccessibleContext, AccessibleContext.getAccessibleAction()

Field Summary

static String DECREMENT
          An action which decrements a value.

static String INCREMENT
          An action which increments a value.

static String TOGGLE_EXPAND
          An action which causes a tree node to collapse if expanded and expand if collapsed.

Method Summary

boolean doAccessibleAction(int i)
          Performs the specified Action on the object

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.

Field Summary
`static String`	`DECREMENT` An action which decrements a value.
`static String`	`INCREMENT` An action which increments a value.
`static String`	`TOGGLE_EXPAND` An action which causes a tree node to collapse if expanded and expand if collapsed.

Method Summary
`boolean`	`doAccessibleAction(int i)` Performs the specified Action on the object
`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.

Field Detail

TOGGLE_EXPAND

static final String TOGGLE_EXPAND

An action which causes a tree node to collapse if expanded and expand if collapsed.

Since:: 1.5

INCREMENT

static final String INCREMENT

An action which increments a value.

Since:: 1.5

DECREMENT

static final String DECREMENT

An action which decrements a value.

Since:: 1.5

Method Detail

getAccessibleActionCount

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.

Returns:: the zero-based number of Actions in this object

getAccessibleActionDescription

String getAccessibleActionDescription(int i)

Returns a description of the specified action of the object.

Parameters:: i - zero-based index of the actions
Returns:: a String description of the action
See Also:: getAccessibleActionCount()

doAccessibleAction

boolean doAccessibleAction(int i)

Performs the specified Action on the object

Parameters:: i - zero-based index of actions
Returns:: true if the action was performed; otherwise false.
See Also:: getAccessibleActionCount()