javax.accessibility

Interface AccessibleValue

Known Implementing Classes:
AbstractButton.AccessibleAbstractButton, Button.AccessibleAWTButton, Checkbox.AccessibleAWTCheckbox, CheckboxMenuItem.AccessibleAWTCheckboxMenuItem, JButton.AccessibleJButton, JCheckBox.AccessibleJCheckBox, JCheckBoxMenuItem.AccessibleJCheckBoxMenuItem, JInternalFrame.AccessibleJInternalFrame, JInternalFrame.JDesktopIcon.AccessibleJDesktopIcon, JMenu.AccessibleJMenu, JMenuItem.AccessibleJMenuItem, JProgressBar.AccessibleJProgressBar, JRadioButton.AccessibleJRadioButton, JRadioButtonMenuItem.AccessibleJRadioButtonMenuItem, JScrollBar.AccessibleJScrollBar, JSlider.AccessibleJSlider, JSplitPane.AccessibleJSplitPane, JToggleButton.AccessibleJToggleButton, Menu.AccessibleAWTMenu, MenuItem.AccessibleAWTMenuItem, PopupMenu.AccessibleAWTPopupMenu, Scrollbar.AccessibleAWTScrollBar

public interface AccessibleValue

If an object implements this interface then it must be able to control a numerical value. For example, a scroll bar has a position represented by a number. Accessibility software can use the implementations of this interface to change the associated value.

The AccessibleContext.getAccessibleValue() method should return null if an object does not implement this interface.

Since:
1.2
See Also:
Accessible, AccessibleContext, AccessibleContext.getAccessibleValue()

Method Summary

Number
getCurrentAccessibleValue()
Gets the current value of this object, or null if it has not been set.
Number
getMaximumAccessibleValue()
Gets the maximum value in the range of this object, or null if there is no maximum.
Number
getMinimumAccessibleValue()
Gets the minimum value in the range of this object, or null if there is no minimum.
boolean
setCurrentAccessibleValue(Number number)
Sets the current value of this object.

Method Details

getCurrentAccessibleValue

public Number getCurrentAccessibleValue()
Gets the current value of this object, or null if it has not been set.
Returns:
the current value, or null

getMaximumAccessibleValue

public Number getMaximumAccessibleValue()
Gets the maximum value in the range of this object, or null if there is no maximum.
Returns:
the maximum

getMinimumAccessibleValue

public Number getMinimumAccessibleValue()
Gets the minimum value in the range of this object, or null if there is no minimum.
Returns:
the minimum

setCurrentAccessibleValue

public boolean setCurrentAccessibleValue(Number number)
Sets the current value of this object. Returns true if the number successfully changed.
Parameters:
number - the new value
Returns:
true on success

AccessibleValue.java -- aids in accessibly controlling values Copyright (C) 2002, 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.